Global Warming Is Accelerating – Jim Hansen and Team 0225.rtf
The full article by Hansen et al. article is at
https://www.tandfonline.com/doi/epdf/10.1080/00139157.2025.2434494?needAccess=true
or here:
Global Warming Has Accelerated - Hansen 0125.pdf
The figure below, from Tselioudis (2024), shows that loss of cloud cover has been greater (more blue, back and gray) in the tropical North and South Atlantic Oceans than in the tropical North and South Pacific.
The area low (%) in cloud cover in the tropical North Pacific grew from 11% to 21% from 1984 to 2018, which is 10° of latitude. In the tropical South Pacific, the area low in cloud cover grew from 1° north to 21°south in 1984 (22° of latitude) to 6°N to 29°S over the same span, area low in cloud cover namely by 35° of latitude. That's 13° of growth. That 13° was a greater gain in the tropical South Pacific than the 10° for tropical North Pacific.
In the tropical North Atlantic, over the same time period, the area low in cloud cover grew from 19° of latitude to 41°, (again, 22° of latitude change) over 34 years, In the tropical South Atlantic, the area low in cloud cover increased by 21 to 34° of latitude, which is also 13° of latitude over 34 years.
The narrow equatorial zone, with thicker (and thue more reflective) clouds shrank from 12% to 5% over the 34 years, or by 7%.
In the mid-latitudes in the north Pacific, the area of dense (brown and red) cloud cover shrank from 20% to 17%, or by 3%. In the Pacific's southern mid-latitudes, the area of dense cloud cover stayed at 26%.
In the mid-latitudes in the North Atlantic, the area of dense (brown and red) cloud cover shrank from 25% to 18%, for 7% shrinkage. In the South Atlantic md-latitudes, dense cloud cover shrank by perhaps only 1% over the 35 years.
Below left, the observations are the 3rd (right-most) of the 3 yellow to red graphs below. The High ECS model (left-most of the 3) much more clearly matches OBSERVATIONs than does the middle (Low ECS) graph. This is clearest in southern winter toward 60°S and in northern winter toward 60°N. In addition, the 10-30°S patch from May to December in the High ECS model is a better match to observation than is the Low ECS (middle of 3) map/graph.
The Earth Is Getting Brighter. That’s Good News for Solar. 0425.rtf
Decreasing Cloud Cover Explains the Last 2 Years of Record Heat 0225.rtf
Clean Air Policies Unintentionally Drive Up Wetland Methane Emissions 0225.rtf
Global Warming Has Accelerated - Hansen 0125 PDF.pdf
Global Warming Has Accelerated- Hansen 0125.html
Hottest January on Record Mystifies Climate Scientists 0225.rtf
Click for moreWhat We Learned from the Hottest Year on Record, with Record Low Cloud Cover 0125.rtf
Fewer Low Clouds Explain the Unusually Sudden Temperature Rise in 2023 - 1224.rtf
Is It Clouds, Shipping or a Volcano? Potential Reasons for Record Heat 1224.rtf
Earth Has Warmed Faster than Expected. Why? Clouds. 1224.rtf
Ocean Life Thriving due to Saharan Dust Blown from 1,000s of Kilometers Away 0924.rtf
Cloud Cover Is Easier to Affect than Previously Thought 0524.rtf
The Weirdest Reason the Poles Are Warming So Fast? Invisible Clouds 1123.rtf
Trees Release Sesquiterpene, Making Clouds, Messing with Climate Calculations 0923.rtf
What Happens in Antarctica, Doesn’t Stay in Antarctica 0823.rtf
We’re 60 Years Too Late to Stop Global Warming, Sea Level Rises 1120.rtf
Dust Storms Are on the Rise in the Southwest. That Could Harm Health. 0723.rtf
Investigating the Enigma of Clouds and Climate Change 0817.rtf
Why Clouds Are the Key to New Troubling Projections on Warming 0220.rtf
As the World Warms, Clouds Could Disappear 0319.rtf
More Frequent Dust Storms Could Be in Our Future 0523.rtf
How Does Albedo Affect Climate? 0423.rtf
Atmospheric Mineral Dust May Have Hidden True Extent of Global Heating 0123.rtf
Clouds, One of Climate Change’s Great Mysteries Is Finally Being Solved 1222.rtf
Snow and Ice Loss Causing Arctic to Reflect Less Heat 1119.rtf
Do Aerosols Make More Clouds or Brighter Clouds? 0822.rtf
Bigger Dust Storms Are Happening More Frequently 0622.rtf
Climate Change Is Making Earth Dimmer 1021.rtf - Due mostly to fewer bright clouds in northeast Pacific, off US.
Climate-Driven Changes in Clouds Are Likely to Amplify Global Warming 0721.rtf
Greener Aviation Fuel Create Fewer Contrails, Reducing Global Warming 0621.rtf
Satellite Observations Show Marine Clouds Amplify Global Warming 0621.rtf - take 1
Warm Clouds Are Cooling Earth, Confounding Climate Models 0621.rtf - take 2 - However, the amount of warm clouds has been increasing, while the amount of cold clouds has been decreasing.
Scientists Aren’t Sure What Will Happen to Clouds as the Planet Warms 0521.rtf
Cloud-Making Aerosol Could Devastate Polar Sea Ice 0221.rtf
Causes of Higher Climate Sensitivity in CMIP6 Models 0120.rtf - clouds; abstract +
Climate Worst-Case Scenarios May Not Go Far Enough, Cloud Data Shows 0620.rtf - Clouds provide a substantial amplifying feedback. Climate sensitivity is about 5°C for doubled CO2, not 3°.
Plane Contrails Have a Surprising Effect on Global Warming 0320.rtf
Clouds in New Climate Models Suggest Paris Goals May Be Out of Reach 0120.rtf - summary of study whose abstract is above
A World of Searing Heat and Melted Ice Caps- Climate Model of Early Eocene Is ‘Scary - Near PETM events, global surface temperature was ~ 14°C warmer then now. Climate became increasingly sensitive to CO2 at higher temperatures. "Their model showed how clouds played a huge role in global temperatures."
Finding’ for Earth’s Future 0919.rtf
What Climate Change Means for Globe-Traveling Saharan Dust 0719.rtf
How Dust from Receding Glaciers Is Affecting the Climate 0619.rtf
Dust from Melting Glaciers Could Create Clouds 0319.rtf
Very High CO2 Could Suppress Cooling Clouds, Climate Model Warns 0219.rtf
Climate Change Will Bring Cloud-Free Skies, for Disastrous ‘Feedback Loop’ 0219.rtf
4 Things That Could Kill Us Before the Cloud Apocalypse Does 0219.rtf
Why Clouds Are the Key to New Troubling Projections on Warming 0220.rtf - Newer global climate models (GCMs) do a much better job of handling clouds, for which droplet size is very important, as is large scale (10s to 100s of kilometers): micro and macro in the same model.
These newer GCMs find that clouds diminish as Earth's surface warms. See reasons in the figures below: How Climate Change Breaks Up Clouds.
Thus, they have an amplifying effect on warming. Note cloud figures with trend lines, farther below. This means that the warming feedback concerning clouds has been considerably underestimated. And that holding global surface warming to an acceptable level is far more difficult than most scientists thought during 1980-2015.
The likelihood of catastrophic warming is much higher than we thought. Earth's carbon budget remaining to keep warming under 2°C is far less than zero.
And legacy carbon in the air is very dangerous and CO2 removal is paramount.
The trend thru 2012, below was -.00064 (-.06399%) per year. Loss of cloud cover, thru 2018, may have speeded up a bit.
Global Warming Tidings Get a Boost, after Cloudy Climate Issue Cleared Up 0716.rtf - take 1 on study
Cosmic Rays & Clouds 0500.pdf - broadly similar to, and precursor to, Tim Patterson's article and graphs above
Swedish Climate Study Icebreaker Reaches North Pole to Study Clouds 0818.rtf
Climate Change Is Making Nighttime Clouds More Visible 0718.rtf
Thinning Clouds Increase California’s Wildfires 0618.rtf
Study Reveals Forests Have Yet Another Climate-Protection Superpower 0118.rtf
Clouds Aren’t a Climate Thermostat, Won’t Save Us from Global Warming 1217.rtf
Clearing Clouds of Uncertainty - Zelinka 1017.rtf
The Surprising Effect of Ocean Waves on Global Climate 0817.rtf
Ocean Warming due to Plankton Collapse 0616.rtf
Scientists Dim Sunlight, Suck Up CO2 to Cool Planet 0717.rtf
Global Warming Tidings Get a Boost, after Cloudy Climate Issue Cleared Up 0716.rtf
The World’s Clouds Are in Different Places than They Were 30 Years Ago 0716.rtf
Findings from Making Own Clouds Require Rethink on Speed of Warming 0516.rtf
Clouds Play Lesser Role in Curbing Warming, Study Finds 0416.rtf
Clearing Up Dust's Effect on Climate 1215.rtf
Tiny Sea Creatures Are Making Clouds over the Southern Ocean 0715.rtf
Man-Made Pollutants Increase the Cooling Effect of Saharan Dust 0415.rtf
Changes in Water Vapor and Clouds Are Amplifying Global Warming 0415.rtf
Cosmic Rays Add Little to Climate Change 1113.rtf
Clouds of (Slightly Less) Unknowing 1013.rtf
Pollution Yields Larger, Deeper, Longer-Lived Clouds, So Colder Days, Warmer Nights 1113.rtf
Ocean Acidification Makes Plankton Emit Less Cloud-Seeding Compounds 0813.rtf
Clouds Feedback Amplifies Warming 0809.rtf
Clouds Amplify Warming 0709.rtf
Researchers Unmask Climate Secrets of Sea Spray and Clouds 0413.rtf
Bacteria Survive at High Altitudes, Seed Clouds 0113.rtf
Skeptic Torch Lights Way to New Science on Clouds 1212.rtf
Positive Feedback from Low Level Clouds 0709.rtf
More Hi Clouds Warmed Earth, 2000-4 0106.rtf
Clearing Clouds of Uncertainty - Zelinka 1017.rtf - original scientific paper, 2 of 3 figures omitted. See just below.
In Zelinka's graph below, the big dots are for central estimates, thick bars for standard deviations, thin bars for range, among 18 models.
Below are 2 cloud cover trend graphs by Dr. Fry, one by temperature and one by time.
Below are 2 cloudiness graphs from the World Meteorlogical Organization, c. 2009
Investigating the Enigma of Clouds and Climate Change 0817 - With warming, clouds are migrating toward the poles.
Clouds have their greatest cooling impact around the equator, because of the higher sun angle (overhead more often).
The World’s Clouds Are in Different Places than They Were 30 Years Ago 0716 - take 2 on study
The table above shows that, since 1985, cloud cover has been increasing in the tropics and sub-polar regions, especially 10°N to 10° S. In the sub-tropics and temperate regions (25-45 or 50°, latitude), it has been decreasing.
US emissions peaked in 1973 (at 30.56), Europe's in 1980 (at 60.44), and China's in 2006 (at 37.78). China passed the US in 1994 and Europe in 1999. India passed China in 2021 and may not have peaked yet.
A graph further below shows estimated SO4 emissions, including non-human ones (40 MT from dimrthyl sulfide for sea surf organisms, plus episodic ones from volcanoes (rough estimates)). SO4 has 1.5 tims the molecular weight of SO2, so the vertical scale below is 1.5 times as high.
Clean Air Policies Unintentionally Drive Up Wetland Methane Emissions 0225.rtf
Hottest January on Record Mystifies Climate Scientists 0225 .rtf
Is It Clouds, Shipping or a Volcano? Potential Reasons for Record Heat 1224.rtf
Are We Underestimating Global Warming? 0924.rtf
Climate Scientists Baffled by Unexpected Pace of Heating 0824.rtf
We’ve Been Accidentally Cooling the Planet — and It’s About to Stop 0624.rtf
‘Termination Shock’. Cut in Ship Pollution Sparked Global Heating Spurt. 0524.rtf
Less Sea Ice Means More Arctic Trees—Which Means Trouble 0324.rtf
Click for moreThe Disagreement between 2 Climate Scientists That Will Decide Our Future 1223.rtf
Is Climate Change Speeding Up? Here’s What Jim Hansen, Scientists Say. 1223.rtf
More Frequent Dust Storms Could Be in Our Future 0523.rtf
Dust Storms Are on the Rise in the Southwest. That Could Harm Health. 0723.rtf
Tiny Aerosols Pose a Big Predicament in a Warming World 1122.rtf
The Terrible Paradox of Air Pollution and Climate Change 0923.rtf
Dark Brown Carbon Is One Nasty Wildfire Pollutant We’ve Been Ignoring 0823.rtf
Emission Cuts Could ‘Unmask’ Deadly Face of Climate Change 0623.rtf
James Hansen Warns of a Short-Term Climate Shock, with 2° of Warming by 2050 - 0523.rtf
How Does Albedo Affect Climate? 0423.rtf
Arctic Amplification Mechanisms and Need for Solar Radiation Management - PRAG 1222.doc
Cleaner Air Is Now Adding to Global Warming 0722.rtf
Do Aerosols Make More Clouds or Brighter Clouds? 0822.rtf
Aerosol Emissions Masked Global Warming’s Supercharging of Tropical Storms 0522.rtf
Aerosols from Burning Fossil Fuels Are Masking Global Warming 0622.rtf
Protecting the Beasts of the Land and Sea Could Help Fight Climate Change 0322.rtf
Forests’ Climate-Cooling Effect Is Greater than Previously Known 0322.rtf
Aerosol Pollution Is Destabilizing Earth’s Climate and Threatens Our Health 0322.rtf
Covid Shutdown Linked to Record Rainfall in China 0222.rtf
Soot Is Accelerating Snow Melt in Popular Parts of Antarctica 0222.rtf
Will Tonga Volcanic Eruption Affect Global Climate? 0122.rtf - not much. Tonga’s SO2 emissions were only 2% of Pinatubo’s. But it put lots of water vapor in the air, for a short time.
Global and Regional Trends of Atmospheric Sulfur 0119.rtf
Global Warming Rate over Next 25 Years Could Double the Previous 50’s - Hansen 0921.rtf
Tropical Climate Change Is a Puzzle—Could Aerosols Be a Piece? 0921.rtf
NASA Direct Measurements, including Aerosols, Show Humans Cause Climate Change 0421.rtf
Earth Warmed as Virus Reduced CO2 and Sulfur Emissions 0221.rtf
Human Aerosol Cooling Obscures 1:4 of Global Heating since 1750 - 0121.rtf
Severe 2019-20 Australia Wildfires Slightly Cooled Earth, like a Volcanic Eruption 1220.rtf
In an Odd Twist, Cleaner Air in China May Mean a Warmer Earth 0920.rtf - subtract sulfates, unmasking warming
Climate Change Caused Havoc 2000 Years Ago 0720.rtf - sulfates in stratosphere from volcano in Alaska caused famine in China and Mediterranean basin, falls of Ptolemaic dynasty and Roman Republic
Will Tonga Volcanic Eruption Affect Global Climate? 0122 - not much. Tonga’s SO2 emissions were only 2% of Pinatubo’s. But it put lots of water vapor in the air, for a short time.
The SO4 from SO2 Emissions graph / estimated data is drawn from a 2000 IPCC figure for SO4 concentrations in Greenland ice and from a dabtabase on global industrial SO2 emissions. It uses interpolation and estimated contributions from major volcanoes.
Figure 8.2 (in part) from the IPCC 5th Assessment, WGI.
Tg = million tonnes
Particulate Matter’s Cooling Role on Earth Is Stronger than Previously Thought 1219.rtf
Cleaning Up China's Dirty Air Would Give Solar Energy a Huge Boost 0719.rtf
Pollution in India Could Reshape Monsoons 0119.rtf
Global and Regional Trends of Atmospheric Sulfur 0119.rtf
How Air Pollution Has Put a Brake on Global Warming 0318.rtf - 0.5 to 1.1°C, according to Samset et al. (take 2, take 1 below)
Why Aerosols Pose a Deadly Climate Change Threat 0218.rtf - Sulfate aerosols have masked up to 1/2 of warming to date.
Overlooked Tiny Air Pollutants Can Have Major Climate Impact 0118.rtf
Cleaning Up Air Pollution May Strengthen Global Warming 0118.rtf
India to Introduce Clean Fuels Faster to Combat Delhi Smog Crisis 1117.rtf - Cut sulfur in diesel and gasoline by 80%.
How Air Pollution Is Causing the World’s ‘3rd Pole’ to Melt 0816.rtf
Sulfate Aerosols Implicated in Global Warming Slowdown 0616.rtf
How Cleaner Air Could Actually Make Global Warming Worse 0316.rtf
Why the Sahel Rains Failed – and Why They May Return 0116.rtf - sulfate pollution over the Atlantic dampened evaporation
Meeting a Global Carbon Limit Is Cheaper Than Avoiding One - Mann 1115.rtf
Massive Wildfires by Lake Baikal Send Soot to Arctic, Greenland 0815.rtf
Man-Made Pollutants Increase the Cooling Effect of Saharan Dust 0415.rtf
Humans Polluted the Air long Before Industrial Revolution, Study Finds 0215.rtf
Small Volcanic Eruptions Could Be Masking Global Warming 0115.rtf
Mysteries in Fire and Ice 1214.rtf
Yak Dung Is Making Climate Change Worse 1214.rtf
Small Volcanoes May Be Slowing Down Global Warming 1114.rtf
Cooker Reduces Black Carbon Problem 0913.rtf - also on Energy Use page, under Other
What’s the Role of Sulfate Aerosols in Climate Change? 0913.rtf
Oil and Gas Production Drives Arctic Ice Melt 0913.rtf
How Soot Killed the Little Ice Age 0913.rtf
IPCC Sulfates & GHG Levels.pdf
Volcanic Eruptions by Size, over History.rtf
Plant Particles Slow Global Warming 0413.rtf
Volcanic Activity Linked to recent Dip in Global Warming 0313.rtf
Volcanic Origin for Little Ice Age 0112.rtf
Pollution Cools, Worsens South Asia Smog 0112.rtf
Rising Air Pollution Worsens Drought and Flooding 1111.rtf
Small Volcanoes Cool Climate 0711.rtf
Asian Emissions Have Masked Recent Warming 0711.rtf
Iceland Eruption to Cool Earth Short Term 0410.rtf
Aerosols Cloud Climate Picture 1009.rtf
Sulfate Aerosol Increases & China 0809.rtf
Giant Asian Smog Cloud Masks Warming 1108.rtf
Faustian Bargain & Aerosols - Hansen 0313.pdf
Aerosol Cooling Effect on Climate May Be Overstated 0513.rtf
IPCC Sulfate & GHG Levels.jpg
Particulate Matter’s Cooling Role on Earth Is Stronger than Previously Thought 1219.rtf
Less Sea Ice Means More Arctic Trees—Which Means Trouble 0324.rtf
What Happens in Antarctica, Doesn’t Stay in Antarctica 0823.rtf
Protecting the Beasts of the Land and Sea Could Help Fight Climate Change 0322.rtf
Forests’ Climate-Cooling Effect Is Greater than Previously Known 0322.rtf
We’re 60 Years Too Late to Stop Global Warming, Sea Level Rises 1120.rtf
Section Map: Heat