Climate Catastrophe: Graphs and Commentary

Ongoing essay: updated regularly, last updated October 14, 2021

Climate data from NOAA (version V) unless otherwise stated.

Disclaimer: I am NOT a climate scientist!


A note on the name change

It seems that the names, “Global Warming” and “Climate Change” have recently been superseded by names like “Climate Crisis,” “Climate Emergency” and “Global Heating.” I don't think any of these names really express the gravity of the situation; so as long as we are changing names, let's go with the far more descriptive “Climate Catastrophe.”

* See below for discussion of Crisis and Catastrophe


Recent Climate Highlights

Some September 2021 Highlights

1. September 2021 was the fifth warmest September on record with an anomaly of 0.90°C warmer than the 20th Century average. September 2021 was 0.04°C behind 2015, 2016, 2019 and 2020 which were all tied for warmest September on record.

2. The last seven 12-month periods ending in September (2015-2021) were the seven warmest on record. Seventh place September 2018 was 0.08°C. warmer than Septembers 2014 and 2010 which tied for eighth warmest.

3. The average concentration of carbon dioxide in the atmosphere in September 2021 increased by 1.78 ppm over September 2020 as measured at the Mauna Loa site. The 12 month running average (October 2020 through September 2021) was 415.88 ppm. Atmospheric CO2 concentrations continue to increase in the neighborhood of 0.2 ppm per month in spite of the much-touted pandemic-induced decrease in industrial activity.

4. The El Niño / La Niña (ONI) index decreased to -0.5 (barely in the La Niña range) for the three month period, July, 2021 though September, 2021. The La Niña episode that began in August 2020 and ended in May 2021 appears to be returning for the 2021-22 season.

La Niña conditions (index of -0.5 or lower) tend to bring cooler global temperatures, while El Niño conditions (index of 0.5 or higher) tend to bring warmer temperatures.

5. Western North America (Mexico, United States and Canada) continues to suffer from intense drought and wildfires.

6. Hurricane Nicholas came ashore in Eastern Texas and caused more flooding to areas that had not yet recovered from Hurricane Ida, which came ashore in the final days of August. Ida crossed the Eastern United States and caused tremendous flooding in the Northeast in early September.

7. China continued to experience both flooding and drought in September.

Some August 2021 Highlights

1. August 2021 was the sixth warmest August on record with an anomaly of 0.90°C warmer than the 20th Century average. August 2021 was 0.07°C behind first place August 2016. August 2015, 2017, 2019 and 2020 were also somewhat warmer than August 2021. This is a fall from July 2021 which was tied with July 2019 for the most anomolously warm July since record-keeping began.

2. The last seven 12-month periods ending in August (2015-2021) were the seven warmest on record. Seventh place August 2018 was 0.08°C. warmer than eighth place August 2010.

3. The average concentration of carbon dioxide in the atmosphere in August 2021 increased by 1.69 ppm over August 2020 as measured at the Mauna Loa site. The 12 month running average (September 2020 through August 2021) was 415.73 ppm. Atmospheric CO2 concentrations continue to increase in the neighborhood of 0.2 ppm per month in spite of the much-touted pandemic-induced decrease in industrial activity.

4. The El Niño / La Niña (ONI) index held steady at -0.4 (neutral conditions) for the three month period, June, 2021 though August, 2021. The La Niña episode that began last August and ended in May is considered likely to return in the Fall.

La Niña conditions (index of -0.5 or lower) tend to bring cooler global temperatures, while El Niño conditions (index of 0.5 or higher) tend to bring warmer temperatures.

5. Summer 2021 was the warmest summer ever in the lower 48 United States beating out the dust-bowl summer of 1936 by an insignificant margin.

6. On August 14, it rained at the summit of the Greenland ice sheet for the first time in recorded history.

7. Hurricane Ida came ashore on the gulf coast causing intense flooding and damage. It then crossed to the northeastern United States where it caused even more intense flooding. Ida was responsible for 77 deaths and a minimum of $43 Billion of damage.

8. The year-long drought in Mexico, US, Canada, China, Brazil and elsewhere continues to wreak havoc with the world's food supply and cause devastating fires.


“But if the watchman see the sword come, and blow not the trumpet, and the people be not warned: if the sword come and take any person from among them, he is taken away in his iniquity: but his blood will I require at the watchman's hand.*” —Ezekiel 33:6 (KJV)

* I will hold the watchman accountable for his death.



How to read this graph:
This graph compares each month separately to the 20th Century average (for months of that same name only) and ranks them separately. In other words: The month of March is compared only to other Marches. The month of September is compared only to other Septembers.

For example: The warmest March, June and October are all colored red. The second warmest January, April and December are all colored orange. The February colored light blue (2013) is between the 11th and 15th warmest Februaries inclusive and is 0.66° C. warmer than the average of all Februaries in the 20th Century. The December colored yellow (2018) is the third warmest December and is 0.88° C. warmer than the average of all Decembers in the 20th Century. Etc.

When there is a tie, the tying months are all given the highest rank. For example, Septembers: 2015, 2016, 2019 and 2020 are all colored red (warmest). No September is colored orange (second warmest) yellow (third warmest) or light green (fourth warmest).
Some points to note:
1. The data for this graph come from the National Oceanic and Atmospheric Administration (NOAA)'s climate at a glance section.

2. This graph gives the Earth's approximate average surface temperature for each month. Needless to say, distilling the world's climate into one number per month is a gross over-simplification. Further, surface temperature is only part of the story. Temperatures in the upper atmosphere and ocean depths contribute to surface anomalies through convection and heat exchange.

3. Temperature anomalies are not necessarily distributed equally around the globe. The maps in this article from the Washington Post shows global cool and warm spots. The Arctic has warmed to a far greater degree than average. The North Atlantic where a weakened Gulf Stream terminates has actually cooled.

4. June 2021 was the fifth warmest June overall, but the warmest June over land. As the warmest June in North America, it was responsible for the Pacific northwest heat dome which killed over 600 people and is thought to be the most extreme heat event that Planet Earth has experienced since record keeping began.

5. Some historic data changed significantly in May, 2019 as NOAA transitioned to using its Version V dataset and model. June, 2019 brought many small changes, probably due to NOAA fine-tuning its new dataset. Generally, data change only slightly (at most one or two hundredths of a degree) month to month, as NOAA refines its models and data-crunching techniques.

6. Every month since February 2008 has an anomaly (distance from the 20th Century average) above 0.4° C. The last month with a negative anomaly was Dec. 1984. The highest anomaly was 1.31° C. in March 2016, roughly equivalent to 1.51°C. above the 1850-1900 average which the IPCC refers to as “pre-industrial” levels.

7. This graph shows a short term rising trend from 2008 to the present with a large bump during the 2014-2016 monster El Niño episode, smaller bumps during the moderate 2009-2010 El Niño and the weak 2019-2020 El Niño and a significant dip during the 2020-2021 moderate La Niña episode. It also shows wide variation from month to month; but the rising trend is still discernible at a glance. 2005 (not shown) was the warmest year to date before this graph. It has since been surpassed by 2010, 2014, 2015 and 2016 (in that order) as the warmest year to date.

8. July 2021 was tied with July 2020, July 2019 and July 2016 for the warmest July on record. Since July tends to be the warmest month of the year, July 2021 is likely tied for the warmest month on record too.

9. All of the three highest ranking months of each name (including ties) lie within the latest 77 months. All of the latest 82 months, except February 2021, are within the top ten warmest with that name and have an anomaly greater than or equal to 0.75°C. above the 20th Century average.

10. Other models, such as ERA5 which is now used at the Copernicus Climate Change Service give somewhat different results. ERA5 tends to rate recent months warmer than NOAA's model. For example, ERA5 rated November 2020 the warmest November on record by 0.13°C. NOAA rates November 2020 second warmest, 0.05°C. behind November 2015. Copernicus gives a rough comparison of several popular climate models here.

Which model is correct? All and none. Models are simply simplifications of the real world. No model of a complex system is exact (otherwise it wouldn't be a model). Complex mathematical models are full of assumptions and educated guesses. Nevertheless, short of clairvoyance, they appear to be the best we have; so yes, use them and refine them; but one would be wise not to put too much trust in them.

11. The last seven 12-month periods ending in September (2015-2021) have been the seven warmest on record. The seventh warmest 12-month period ending in September (2018) was 0.08°C warmer than Septembers 2014 and 2010 which were tied for eighth warmest. The 9 warmest 12-month periods ending in September all lie within the last 12 years.
12. Temperatures appear to have risen about 0.27° C. over the last ten years (difference between average anomaly of 36 months ending in September, 2021 and average anomaly of 36 months ending in September, 2011).
Why is this graph important?
1. This is a “you can't see the forest for the trees” graph. Forests are important; but so are individual trees. Indeed, there is no forest without the trees.

2. This graph allows you to see the present in detail. (present here meaning the approximate average monthly surface temperature over the latest 13+ years.)

3. You can get a similar graph from
NOAA's Climate at a Glance section; but I like the way this graph presents the data. I think the white spaces and the color coding increase readability.

4. Why 13+ years? Why not some other period like 7 or 15 years? No particular reason. With a longer period the lines get squished together and are harder to read. Shorter periods show less data. This started out as a ten year graph but has grown longer as I add months.

5. I intend to update this graph around the 15th of each month after NOAA comes out with a new month of global climate data.

6. How did I get into this? In 2016 my favorite website for news, Common Dreams, used to report the NOAA data month after month as they set new records. They stopped when September 2016 fell to second place. Being curious, I went to the NOAA site and wondered why it wasn't reported as news that the three warmest Septembers on record were in 2015, 2016 and 2014 (in that order). After a few months of silence, I decided to start reporting this data myself. (Sept. 2016 has since been upgraded to tied for warmest September with Septembers 2015, 2019 and 2020.)

A longer term temperature graph — 52+ years


1. This 52+ year graph of 12 month overlapping periods measures the temperature anomaly from the 20th Century average. The colors refer to the El Niño / La Niña condition during the three month interval centered on the final month of the 12 month period.

2. El Niño / La Niña (ENSO) refers to cyclical changes in atmospheric and oceanic circulation patterns over the tropical Pacific Ocean. El Niño episodes usually bring warmer global surface temperatures; La Niña episodes usually bring cooler surface temperatures. There is a brief explanation of El Niño and La Niña here.
An ONI (Oceanic Niño Index) is computed for each overlapping period of three consecutive months based of conditions in the tropical Pacific Ocean. If the ONI index is at least 0.5 (at most -0.5) the three-month period is considered an El Niño (La Niña) period. Five or more consecutive El Niño (La Niña) periods are considered an El Niño (La Niña) episode. An El Niño episode is very strong (strong, moderate, weak) if it contains three El Niño periods with index at least 2.0 (1.5, 1.0, 0.5). A La Niña episode is strong (moderate, weak) if it contains three La Niña periods with index at most -1.5 (-1.0, -0.5). These classifications are somewhat arbitrary.
3. The ENSO condition can cause significant changes in global surface temperatures. The table below gives estimates of annual global surface temperatures for the last six calendar years, assuming neutral ENSO conditions had prevailed throughout. According to these estimates, year 2020 would have been the warmest year on record by 0.03°C.


4. This graph is surprisingly smooth in spite of all the crests and troughs.

5. Exceptionally high temperature crests have followed the two very strong El Niño episodes of 1997-98 and 2014-16. Surface temperatures have fallen after the end of these El Niño episodes but remained much higher than before the El Niño episode began. This happened to a lesser extent after the moderate El Niño episode of 2009-2010.

6. Temperatures fell over the first half of 2021 as we experienced a moderate La Niña episode. However the fall is not nearly as precipitous as would be expected from the historical record. Since the end of the La Niña episode in May temperatures have leveled off.

7. This graph consists of a progression of waves (heat waves) with increasingly high crests and troughs. Crests and troughs are marked with black dots and connected with black lines.
Crests are local maxima which are greater than or equal to all readings to the left. Troughs are local minima that are lower than or equal to all readings to the right. If more than one crest lies between two troughs only the rightmost crest is marked. If more than one trough lies between two crests only the leftmost trough is marked.
8. Crests have increased from a height of 0.22° C. (above the 20th Century average) in 1973 to 1.06° C. in 2016. Troughs increased from a height of -0.10° C. in 1976 to 0.81° C. in 2018. 12-month running temperature averages increased after the 2018 trough until mid-2020 when they leveled off, and then fell to just above the 2018 trough before leveling off again in mid-2021. On the whole, temperatures appear to be accelerating at a super-linear rate.

9. Climate-wise, extrapolation and longterm prediction are a very risky endeavor. However, looking at the two graphs above, I would not be surprised to see us exceed 1.30° C. above the 20th Century average (roughly equivalent to what the IPCC refers to as 1.5° C. above pre-industrial levels) within a decade.

10. In short: We're in terrible trouble. We better do something quick.

Another 52+ year graph — CO2 in the atmosphere


1. The data for this graph come from the average monthly readings for CO2 in the atmosphere, taken at the Mauna Loa site in Hawaii. Each line in the graph is a weighted average of 12 consecutive months. (E.g.: The line for March 2018 is the weighted average of April 2017 through March 2018.)
Note: In February 2021, NOAA updated its monthly readings from the WMO CO2 X2007 scale to the WMO CO2 X2019 scale. Due to this change in scale, some monthly readings have changed by as much as 0.32 ppm (parts per million) and some 12 month averages have changed as much as 0.25 ppm. The entire graph above has been updated to the X2019 scale which is described here.
2. The average at Mauna Loa for the most recent 12 months is 415.88 ppm. The global average is thought to be slightly less than the readings at Mauna Loa.

3. CO2 (and other greenhouse gases like methane) in the atmosphere act like a one way glass allowing incoming electromagnetic radiation from the sun to pass through the atmosphere, but trapping outgoing radiation from the Earth, thereby warming the planet.

4. For each month since the end of 1974, the change in the 12 month running average from month to month has been positive. The monthly change since 1968 ranges from -28 to 348 ppb (parts per billion). The average yearly increase over the period covered by this graph (since 1968) is 1.76 ppm (parts per million).

5. The increase in CO2 from the 12 months ending in September 2020 to the 12 months ending in September 2021 is 2.29 ppm, 30% above the average 12-month increase since 1968. (We have a lot of work to do if we are to meet the goal of the December 2015 Paris Climate Agreement.)

6. The monthly record for the year for CO2 in the atmosphere is typically set in May, when northern hemisphere trees come out of dormancy and begin to sequester CO2 in earnest. CO2 concentrations in the atmosphere typically fall from June through September and then rise again from October through May as northern hemisphere trees go into winter dormancy.

7. One usually sees these graphs of CO2 in the atmosphere as a succession of waves rising higher each year; but I like this graph of 12 month running averages, because it shows the steady month to month increases of CO2 in the atmosphere. Also, the almost solid gray at the bottom of the graph gives the impression of CO2 rising and filling the atmosphere. Some folks like the waves better and liken them to the rhythm of the Earth breathing.

8. In addition, the graph above demonstrates through its concavity that the change in the running 12 month average of CO2 in the atmosphere has been increasing.
A very short term, 1 year, graph of CO2 in the atmosphere



1. This graph of 30-day average concentrations of CO2 in the atmosphere at Mauna Loa begins in December 2019 and runs through January 2, 2021.
Note: This graph and commentary refer to the WMO CO2 X2007 scale. NOAA has not yet released daily averages during this period according to the more recent WMO CO2 X2019 scale.
2. During the period, December through May, concentrations of CO2 in the atmosphere should be expected to increase, leveling off or beginning to decrease toward the end of May.

3. In December, the 2019 novel coronavirus, now named SARS-CoV-2 or commonly, the COVID-19 virus or just the coronavirus, was confirmed. The ensuing epidemic, now a worldwide pandemic, caused a sharp decrease of economic activity in China where the pandemic started.

4. 30-day average concentrations of CO2 appear to have quickly responded, beginning to level off in mid-February, peaking at 414.21 ppm during the 30 days ending on February 25, and falling to 413.84 ppm by the 30 days ending on March 13. This cannot easily be explained by simple natural variation (see
Some Indications That COVID-19 May Have Affected Atmospheric CO2 Concentrations in February and March, 2020).

5. 30-day average concentrations of CO2 rose again to 414.57 by the 30 days ending on April 1 and 416.30 by the 30 days ending on May 1, seeming to make up for the mid-February through mid-March decrease. The most likely explanation seems to be the resurgence of economic activity in China concomitant to the Chinese bringing the COVID-19 pandemic under control in China. The blue area on the graph represents expected atmospheric CO2 concentrations between February and April inclusive that do not appear in the record.
Note: “Experts” claim that this dip in CO2 concentrations could not possibly be caused by the pandemic induced economic slowdown; however, to my knowledge, they have no other explanation to offer, except natural variation, which seems highly unlikely.
6. If these conjectures hold, it is possible that we could reverse global warming by simply suspending much of our economic activity. It would seem that CO2 concentrations in the atmosphere did not respond to the pandemic in other countries the way they did in China.

7. While some toot a decrease in anthropogenic CO2 emissions on account of the COVID-19 pandemic, it should be noted that this has had little, if any, overall effect on atmospheric CO2. Average atmospheric CO2 concentrations rose by 2.36 ppm in February 2020 over February 2019 and by a similar amount in each subsequent month through December 2020. By comparison, the 52+ year average 12-month increase is 1.76 ppm. (See previous graph.) We appear to be walking backwards.

8. I find this graph of 30-day running averages interesting as it contains short-term information that gets lost in viewing only monthly graphs. This graph shows well that concentrations of CO2 in the atmosphere rose sharply in April and hit a maximum of 417.13 ppm over the 30-day period ending on May 28, after which concentrations leveled off and then fell to 411.07 by the 30-day period ending on October 16. Concentrations began to rise again after mid-October as expected.

9. The above graph is surprisingly smooth expect for the “missing piece” for the 30-day periods between late February and early April. I liken the missing piece to the bite of a huge dragon. My wife thinks it is more like the nibbles of a bevy of bunnies.
The missing graphs

Here should go historic graphs on global land use, droughts, desertification, floods, cyclones, wildfires, etc. Sadly, I have no such graphs, and not even the data to make them. Maybe later.

1. Climate v. weather: Weather is what you see outside your window. It changes hour by hour, day by day. Climate is the sum total of weather (and other factors) over a period of years, decades, centuries or longer. Yes, it changes too; but in most cases, slowly. Anthropogenic climate change is climate change caused by human activities.

2. Weather is by nature extremely variable and extreme events have, until recently, been by nature rare. This makes it difficult to attribute any particular extreme weather event to climate change. And because such events are rare, it is difficult to achieve statistical significance. Another difficulty is that minor differences in weather related variables can make the difference between a devastating event (like Hurricane Harvey in 2017) and an event that causes far less destruction (like Hurricane Barry in 2019).

3. Lately, extreme weather events have become more extreme and more common. Consider: five years in a row of devastating fires in California; exceptional heat, drought, floods and fires during both Australia's 2018-19 and 2019-20 summer; record-breaking heatwaves in the Arctic, a record breaking 2020 Atlantic hurricane season; and much much more. Climate models can explain these events. I've yet to see any other reasonable explanation.

4. The June 2021 heat dome over western North America may have been the most extreme heat event ever recorded on Earth. Climate models predict that the June 2021 western North American heat dome would have been close to impossible without the help of anthropogenic climate change.

5. Climate models, however, can be wrong. The June 2021 heat dome over the northwestern United States and southwestern Canada was beyond even the worst cases predicted by climate models. Science tends to err toward the conservative.

6. I think that no one has understood the relationship between climate and weather better than Joseph Conrad, who wrote in
Typhoon (1902):
“Had he been informed by an indisputable authority that the end of the world was to be finally accomplished by a catastrophic disturbance of the atmosphere, he would have assimilated the information under the simple idea of dirty weather, and no other, because he had no experience of cataclysms, and belief does not necessarily imply comprehension.”
Conrad's Captain MacWhirr sailed his ship into the eye of a typhoon, and then brought her battered and bruised into port. Would that the captains of our Ships of State could show such dedication and tenacity.

1. This graph (also from NOAA data) of 36 month overlapping averages (each 36 month period ending in the month with the same name as the latest month for which data is available) from 1880 to the present shows a longer term rising trend, with an increasing rate of warming in recent years.

2. I like 36 month overlapping graphs. I think they smooth the data, but not too much. You can view 12 month or 60 month overlapping graphs at
NOAA's Climate at a Glance section too.

3. There have been various pronouncements that global warming stopped in 1998 (or some other recent year) and global cooling began. This graph demonstrates clearly, without the need for any statistical analysis, that no such thing has happened.

4. Data previous to the 1960s are from surface-based measurements and probably not as accurate as data from later years which include satellite-based measurements.

5. This graph begins about a century after the start of the “industrial revolution” and well into the 1850-1900 period that the IPCC refers to as “pre-industrial.” It details the sharp and increasing rise in global temperatures with the development of technology from around 1910 to the present.

6. This graph also details an even sharper unprecedented rise in global temperatures beginning around mid-2014 and continuing through mid-2016; and then a leveling off of global temperatures after mid-2016.
Some notes on the IPCC and 1.5° C.
The Intergovernmental Panel on Climate Change (IPCC)

1. Thousands of scientists contribute to the assessments of the Intergovernmental Panel on Climate Change (IPCC). Good science is not done by committee — never has and likely never will be. If Albert Einstein had to work with a committee like the IPCC, we might still be struggling without a theory of general relativity.

2. The
“IPCC Special Report on Global Warming of 1.5°C” (2018) notes that there are few direct temperature measurements from before the industrial revolution, so they declare that they will use 1850-1900, the earliest period from which there exist near-global observations to represent the “pre-industrial” period which ended a century earlier. I don't get it. Why don't they just drop the “pre-industrial” and say they are measuring warming from the latter half of the 19th Century? And just how do they know that 1850-1900 is a good representation of pre-industrial temperatures when there are so few direct measurements?

3. I think “pre-industrial” should mean before the start of the industrial revolution which is generally considered to have begun sometime between 1750 and 1800. I find this conflating of the second half of the 19th Century with pre-industrial times confusing at best and perhaps even a deliberate obfuscation. (Sorry folks. Consider this as coming from an unrepentant paranoid conspiracy theorist.)

How do you convert anomaly from the 20th Century average to anomaly from the 1850-1900 average?

1. It ain't easy.

2. Copernicus Climate Change Service estimates its new base period, 1991-2020 as 0.82° C. warmer than the 1850-1900 average. With NOAA's data, I computed Copernicus's base period at 0.62° C. above the 20th Century average. Subtracting, I get 0.20° C., so I add 0.20° C. to NOAA's anomaly from the 20th Century to get a rough estimate of anomaly from the 1850-1900 average. (Sorry folks, but that's the best I can do.)

3. I'm still no closer to an anomaly from real pre-industrial times (before 1750 more or less).

4. Whereas the temperature differences between pre-industrial times and 1850-1900 are thought to be negligible and we estimate the 20th Century average at 0.20° C. above the 1850-1900 period, the latest ten years (2011-2020) measure an average 0.82° C. above the 20th Century average. Who says global warming is a hoax?

Why 1.5° C.?

1. Based on the recommendations of the IPCC, the Paris Climate Agreement seeks to limit global warming to 1.5°C. above pre-industial (later redefined as 1850-1900) levels. So what's the big deal about 1.5° C. anyway?

2. If (unlike yours truly) you are a normal human being, your body temperature is probably around 37° C. (98.6° F.) Now raise your body temperature 1.5° C. At 38.5° C. (101.3° F.) you are probably feeling sick and better go to bed and drink plenty of fluids. Now raise your temperature another 0.5° C. At 39° C. (102.2° F.) you are feeling terribly weak, dizzy and disoriented. Suppose your temperature goes up yet another 2° C. At 41° C. (105.8° F.) you will die, if your body temperature does not come down very quickly.

3. The analogy is not exact. Gaia (The Living Earth) is much more resilient than we puny humans. She has weathered wilder swings in temperature than this. The climate at 4° C. above pre-industrial levels would be very inhospitable to human “civilization,” with monster hurricanes, floods, droughts, and other extreme weather events which would dwarf anything on Earth today. A 4° C. rise in temperature would cause crop failures, famine, disease, and likely, wars over Earth's dwindling resources. It's very unlikely that many of us would survive a 4° C. rise in the Earth's temperature.

4. In truth, I think it misguided to focus on 1.5°, 2.0° or any other number. I think it misguided to focus on the late 19th Century, pre-industrial times, or any other period. It is distracting. We already know what needs to be done; and we know that it needs to be done now. It is quite clear and simple. We must all work together now to stop warming the Earth. We must focus on drastically reducing our carbon footprint immediately. That means giving up our addictions to fighting wars, burning fossil fuels, eating meat, building with concrete, wearing fashion clothing, having lots of babies, traveling by air, etc. etc. etc. It means planting trees, nurturing forests, walking and riding bicycles, eating locally raised foods, etc. etc. etc. Are we ready to do all that? Nothing less will do. It's hard to give up so many addictions all at once; but it may just save us from extinction.

An Exercise: Especially for Climate Change Skeptics

1. Estimate from the graphs and commentary above the probability that if we continue with business as usual, the result will be the collapse of our “global civilization.” 1%? 5%? 10%? 20%? 50%? 90%? 99%?

2. Think about at what percentage value you would recommend that the world take action to reduce global warming. 1%? 5%? 10%? 20%? 50%? 90%? 99%?

3. Think about your answers to the two questions above.
Can Science save us?
1. Well, uh, Science got us into this mess. Scientists taught us how (in the words of Joseph Conrad) “To tear treasure out of the bowels of the land ..., with no more moral purpose at the back of it than there is in burglars breaking into a safe.” But they taught us much more than that. They taught us how to make lots of money by burning the treasure and fouling the air. They also taught us how to make bombs which would render the Earth uninhabitable by humans for years to come, and oh so much more.

2. So can Science save us? When someone tells you they can clean up the mess they made, but you have to pay them to do it, beware. Now we're told that scientists can geo-engineer the planet to keep it cool. Lots of money to be made on geo-engineering, which, judging by all past experiences, will create even bigger problems, that scientists will be very happy to solve for an ever-increasing price.

3. In general, scientists seem unable to grasp the magnitude of what they have wrought. They appear stuck in outdated thought patterns. Can we turn this around? Theoretically, I think, Yes. In practice, Unlikely.

4. I am forever indebted to
Robert C. Koehler for introducing me to this Arhuaco saying, “When you go to dig your fields, or make a pot from clay, you are disturbing the balance of things. When you walk, you are moving the air, breathing it in and out. Therefore you must make payments.” We have been disturbing the balance for a long time, without even a thought about paying for what we take. Payment is long overdue. Nature is foreclosing.
Discussion of Climate Crisis and Climate Catastrophe
1. Global Warming and Climate Change are objective criteria. We can measure temperature today and compare it with measurements taken 50 years ago. Likewise with rainfall, wind velocity, cloud cover, chemical makeup of the atmosphere and other factors, all of which influence climate. The terms Global Warming and Climate Change have served us well. I suggest we stick with them. There is a consensus, not only among scientists, but among all people, particularly young people, that the world is warming and the climate changing.

2. Crisis is a different matter. Crisis is subjective. Crisis implies a turning point. How do you measure degrees of Crisis? Likewise with Catastrophe. A Catastrophe is a terrible event. How do you measure degrees of terribleness? If one doesn't take advantage of a Crisis to turn in the proper direction, one can easily create a Catastrophe.

3. Indeed, that is exactly what has happened with our climate. I've been hearing for some 20 years that the Earth is warming and we must take action now. I'm still hearing it 20 years later. I think we are well past the Crisis stage and into Catastrophe. So what is to be done?

4. Let's revisit Joseph Conrad's Captain MacWhirr. Sitting in the chart room with his ship in the eye of the typhoon, he finally realizes the folly of what he has done. He understands that the worst is to come and his ship is likely to go down with all hands on board. He says to himself, half aloud, “I shouldn't like to lose her.” And indeed, he does not. Against all odds, he sails his ship safely to port, battered and bruised.

5. Like Captain MacWhirr, I, too, “shouldn't like to lose her.” And Captain MacWhirr has sound advice for us: “Don't you be put out by anything. ... Keep her facing it ... Facing it — always facing it — that's the way to get through. ... Face it. ... Keep a cool head.”

6. It is difficult to tell people that we are in the proverbial eye of the typhoon and the worst is to come; yet, tell them we must. How are we to face the looming Catastrophe, if we ignore its true nature?

7. Panic would not be helpful. We must face the looming catastrophe with a cool head.

“Facing it — always facing it — that's the way to get through.”

The Future
1. Many have wondered what will happen to mankind as the climate continues to warm. Some say we will continue with business as usual; others say we will join the dodos and the dinosaurs. I suspect somewhere in between. Our current “civilization” is certainly unsustainable; but I see no reason why, with the grace of God, a few of us can't continue to live on Earth in much the same way as our ancestors did during the Pleistocene, which ended about 11,300 years ago.

2. Personally, I don't think this would be a bad outcome. If we are to survive at all, we must learn our place in the greater scheme of things.

“Yet will I leave a remnant, that ye may have some that shall escape the sword among the nations, ... and they shall lothe themselves for the evils which they have committed in all their abominations.” —Ezekiel 6:8-9 (KJV)
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Unlike the graphs above, the graphs below are based on “proxy data.” That is: global temperatures are inferred from things like tree rings, ice cores, the makeup of the shells of sea critters, type of flora and fauna in the fossil record, etc.

Needless to say the graphs below may not be all that accurate; and the further back in time we go, the less accurate they are likely to be. Nevertheless they seem to be the best we have; so let's go with them.

1. This graph is derived from research by Michael Mann published in 2008.

2. The baseline, 1961 to 1990 average, is approximately 0.14° C. higher than the Twentieth Century average used in the first three temperature graphs above. The scale is Fahrenheit instead of Celsius (1.8° F. = 1.0° C.). The dark gray band represents probable uncertainty.

1. This graph is from research by Shaun Marcott et al. published in 2013 and represents a probable reconstruction of temperatures over the last 11,300 years (Holocene).

2. During the Holocene, mankind learned to domesticate animals, build cities, develop written languages, cut down forests, burn fossil fuels, fight wars etc.

3. The baseline, 1961 to 1990 average, is the same as the previous graph and is approximately 0.14° C. higher than the Twentieth Century average used in the first three temperature graphs above.

4. The gray squiggly lines at the right represent the previous graph superimposed on Marcott's findings.

5. The wide band represents probable uncertainty.

6. This graph shows global temperatures rising 0.5 to 1.0° C. until 7000 years ago and then falling back to a low close to the start of the Holocene. This low is generally called the “Little Ice Age” which lasted, roughly, from around 1500 to around 1900. From the Little Ice Age onward temperatures have risen sharply.

7. One problem with this graph is that the right end of the x-axis (labeled 0) is “the present.” Which year is the present? This is important with temperatures rising by perhaps 0.27° C. in the last decade.

8. It appears from this graph and the temperature graphs presented above that we surpassed the previous Holocene maximum temperature in 2015 and remain above it.

1. This graph represents a possible reconstruction of temperatures during the ice ages and the interglacial periods. (Pleistocene)

2. The scale is Fahrenheit instead of Celsius (1.8° F. = 1.0° C.) and the baseline is the average over the past millennium.

3. The Pleistocene was a succession of wide swings in temperature between ice ages and interglacials, according to this graph by as much as 16° C.

4. I have found it difficult to reconcile this graph with the previous graphs. Since the data come from ice cores, likely they do not reflect global temperatures as a whole.

5. Modern man evolved during this period, probable around 250,000 years ago. Around 50,000 years ago he began to develop more advanced technology and migrated throughout Eurasia, Africa and then Australia and even later, the Americas.

6. Since modern man has been able to survive in almost every ecosystem on the planet, it appears very likely that he will be able to survive in at least some future ecosystem.

7. The same can not be said about “civilization.” “Civilization” developed under some very specific climatic conditions that are unlikely to exist on Earth in the near future.

8. I suspect, if we have not already done so, we will surpass the highest interglacial temperatures soon. (Keep in mind that the temperature has probably risen about 0.27° C. (0.49° F.) over the past decade. (See graphs above.)

1. I don't know where this graph comes from originally. It is all over the internet.

2. 65 million years ago marks the probable demise of the dinosaurs.

3. Temperatures in the Eocene, some 50 million years ago were likely considerably higher than they are today.

4. There are no known “great extinctions” during the Eocene. Indeed, life seems to have thrived during the warm period in the early Eocene.

5. Atmospheric carbon dioxide is thought to have also been much higher during the Eocene than today.

6. The Eocene might give us some clues as to what might happen on Earth in the near future.

1. I don't know where this graph comes from either. It is also all over the internet.

2. The combination of linear and logarithmic scales on the x-axis is somewhat confusing, but allows for extra detail to be shown in more recent times.

3. 542 million years, back to the Cambrian, is a long time. Planet Earth has weathered a lot of changes. May she also weather this one.

4. Looking at these graphs, one should realize how hard it is to predict the future. Science talks in probabilities. There are few certainties in Science.

More discussion of these and other temperature graphs to be added later

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