Global warming report UN circa 1989

[Seth]

Here's a few images taken directly from articles that you linked. The articles even say that those anomalies don't negate the average upward trend. I'm guessing you didn't actually look at anything more than the titles.

[Al Agnew]

The global temp average for one year, or even several years in a row like the quote Seth just posted that 2018 was behind 2015-2017, is NOT how you gauge the warming of the planet.  The deniers kept saying for more than a decade that warming had not occurred since 1997.  Because up until 2015, 1997 had been the warmest year on record.  But 1997 was an anomaly, considerably warmer than any previous year.  But if you averaged out the temperatures by decade, the decade of the 1990s, even with 1997 factored in, was not as warm as the 2000s, and the 2000s were not as warm as the 2010s have been.  

And there are MANY other indicators of warming besides global temperature averages.  Shrinking glaciers, ocean acidification and coral bleaching, changing plant growth zones, melting permafrost, are just a few of these other pieces of evidence.  And the reason that "climate change" is a better name for it than "global warming" is because the changes entail far more than just warming.  And the warming is and will be uneven.  The whole planet isn't and won't uniformly warm.  In fact, there is some possibility that parts of the planet might actually cool, while other parts warm.

If you want to read a good book that shows the relationship of CO2 to climate change, and how past rapid climate changes have been catastrophic for the planet, try "The Ends of the World--Volcanic Apocalypses, Lethal Oceans, and our Quest to Understand Earth's Past Mass Extinctions", by Peter Brannen.  It answers the question often posed by deniers of why the climate has changed before humans appeared on the planet, and how CO2 got so high before.  It also paints a scenario of what major climate change would be like, for us and for the natural world.  

We are engaged in a global experiment which has no precedent in human history.  So CO2 is a minor part of the atmosphere?  Yet significant changes in CO2 are correlated with major changes in the climate.  Here is what I think is the crucial fact:  The fossil fuels we are burning were deposited over hundreds of millions of years, sequestered underground from plants which collected carbon dying over those many millions of years.  All those millions of years of carbon deposits are now being put back into the carbon cycle and into the atmosphere in a period of at most a couple HUNDRED years.  Hundreds of millions of years of carbon deposition, released in hundreds of years. CO2 comes from many natural processes, and you can consider those natural sources as the "background rate" of carbon in the atmosphere, and going through the carbon cycle.  We are adding those millions of years of sequestered carbon back into the cycle, over and above the background rate.   

[MoCarp]

If you look at the numbers, we are at 400 ppm of CO2 up from about 280 ppm about 1850....*1850 is an important date as the end of a several hundred year cooling “the little ice age” anthropomorphic climate change is said to have started at the birth of the Industrial Age. However the highest jump in co2 was in the 60’s from 325 ppm to about 400 a jump of 75 ppm in 50 years...that’s 75 cents vs a million pennies, tiny trace gasses...if you look at the data, we have yet to reach warming events (at least 4) in man’s historical past...well before coal fired electrical plants, steel mills, and automobiles...yes the rate of co2 has jumped, but our ability to track is far better than during the Minoan warming....the human population exhaling co2 has jumped billions just over the last 2000 years, add methane and other greenhouse gases...so it boils down to how would you reduce greenhouse gases to 1850 levels? And are those costs worth the gamble when we don’t understand why we had previous warming ( and cooling) in mans past?. Time is vast we still are learning...

the time of cleopatra is closer to the iPhone than to the building of the great pyramid, here we are predicting changes that have occurred many times in the past...what do we know? Our climate has been extremely stable over the last 5k years...yet we know know we have fluctuated wildly before that time...what causes climate change for sure? Getting smacked by an asteroid/comet, and large or cumulative volcanic eruptions, anthropomorphic climate change hasn’t been proven overtime yet...below are some graphs to ponder

[MoCarp]

Some interesting reading

https://en.wikipedia.org/wiki/Year_Without_a_Summer

 

https://escholarship.org/uc/item/8fj3d8mc

[MoCarp]

paleo eocene thermal maximum

 

https://www.climate.gov/news-features/climate-qa/whats-hottest-earths-ever-been

[MoCarp]

It seems Mars has been warming as well

 

 

Red Planet Heats Up: Ice Age Ending on Mars

https://www.space.com/33001-mars-ice-age-ending-now.html

[BLUEWATER]

Did man made global warming cause an end to the last ice age?

'The last Ice Age, known as the Pleistocene Epoch, began almost 1.8 million years ago and lasted until approximately 11,700 years ago.'

[Al Agnew]

2 hours ago, BLUEWATER said:

Did man made global warming cause an end to the last ice age?

'The last Ice Age, known as the Pleistocene Epoch, began almost 1.8 million years ago and lasted until approximately 11,700 years ago.'

Point of fact...we did NOT come out of the Pleistocene "Ice Age" 11,700 years ago.  We are still in it.  Long term ice ages are punctuated by periods of warmer and colder climate, the cold spells bringing glaciation, the warm spells causing glaciation to retreat.  We are in one of the interglacial warmer periods within the Pleistocene.  Does that mean that we are naturally warming at the rate and extent we see?  No.  Just because there are natural causes of climate cycles, including natural increases and decreases in CO2, doesn't mean our current warming is entirely or even substantially natural.  "Natural" CO2 levels rising has been posited as the cause, or a cause, of previous warming.  Natural increase of CO2 is caused by extensive volcanic eruptions, exposure of carbon-rich rock to the air.  The uplifting of mountain ranges due to plate tectonics results in more carbon rich rock being exposed and eroded, leading to more CO2 in the atmosphere.  But we know how slowly, in human terms, that happens.  Obviously plate tectonics can't explain the current rise in CO2 at the rate it's happening, nor climate change at the rate it's happening.  Neither, of course, can volcanic eruptions, which are far, far less extensive than they have been in the past when they increased CO2 enough to change the climate globally for millions of years.  Nope, we know why CO2 is rising, now, and it's us.

[MoCarp]

Some studies suggest the low co2 of the past was because less life on the planet, humans for sure are many billions more that the ice age past...

[MoCarp]

Al, it can be argued that the only way to reduce mans co2 footprint is de-population, and so far the doom gloom of the media pushes the hippie green agenda... the hot weather in Alaska is all over the news, yet have you heard of the record cold in Australia? NO!!!! This makes the second winter in a row that records are being set, ironically weather models suggest onset of ice age conditions show short extremely hot summers, we still don’t understand why, be funny if they eliminated carbon from our lives only to see a global ice age, build co2 plants in an effort to warm the planet woops 

 

https://www.abc.net.au/news/2019-05-31/cold-morning-in-southern-queensland/11166790