New Feedback Phenomenon Found to Drive Increasing Drought and Aridity

Alex Wierbinski's picture

By Alex Wierbinski - Posted on 09 September 2019



Finding an Extreme Land-Atmospheric Feedback Loop

New Feedback Phenomenon Found to Drive Increasing Drought and Aridity,
Columbia University School of Engineering and Applied Science, September 2, 2019.


A Drier Future
" indicates that the world will experience more frequent and more extreme drought and aridity than currently experienced in the coming century, exacerbated by both climate change and land-atmosphere processes."

Land-Atmosphere Processes
"Concurrent soil drought and atmospheric aridity is a time period when soil moisture is extremely low and vapor pressure deficit is extremely high."

"The researchers demonstrate that concurrent soil drought and atmospheric aridity are largely driven by a series of land-atmosphere processes and feedback loops."

New Area of Study
"Most groups have been focused on assessing concurrent drought and heatwaves, but we are finding stronger coupling between drought and aridity than between drought and heatwaves."

A Deadly Process to Nature
"...very low soil moisture, and atmospheric aridity, represented by very high vapor pressure deficit, a combination of high temperature and low atmospheric humidity, are the two main stressors that drive widespread vegetation mortality and reduced terrestrial carbon uptake."

In a Feedback Loop
"The team discovered that the feedback of soil drought on the atmosphere is largely responsible for increasing the frequency and intensity of atmospheric aridity. In addition, the soil moisture-precipitation feedback contributes to more frequent extreme low precipitation and soil moisture conditions in most regions. These feedback loops lead to a high probability of concurrent soil drought and extreme aridity."

A Deadly Process for Man
"Concurrent soil drought and atmospheric aridity have dramatic impacts on natural vegetation, agriculture, industry, and public health."

Grim Future
"Future intensification of concurrent soil drought and atmospheric aridity would be disastrous for ecosystems and greatly impact all aspects of our lives."

Increasing with Global Warming
These..."land-atmosphere feedbacks would further intensify concurrent soil drought and atmospheric aridity in a warmer climate."

Towards Better Models
"It's critical that we better quantify and evaluate the representation of these processes in our climate models. Accurate model representation of both soil moisture variability and the associated feedbacks is crucial if we are to provide reliable simulations of the frequency, duration, and intensity of compound drought and aridity events and of their changes in a warmer climate."



Extreme Weather

August 2019
Europe Frequently Frying During Summer of 2019



About this July European Heatwave


107 in Europe Breaks Records

EURO INFERNO Europe heatwave 2019: Which countries have been affected and how many people have died?
The Sun, July 26, 2019.

July 2019 Heatwave,


Abouth the June European Heatwave

Early June 2019 Heatwave Tortures Europe
Heatwave Scorches Europe


Japan Frying

July-August 2019 Deadly Heatwave

Japan Heat Wave Kills at Least 57 People; Over 18,000 Hospitalized,
The Weather Channel, August 7, 2019.

May 2019 Deadly Heatwave

Japan Heat Wave Kills 5 People, Hospitalizes Nearly 600,
The Weather Channel, August 7, 2019.


Recent Heatwave Research


Dec 2018
More Coordinated Global-Scale Heatwaves in Our Future


July 2018
Climate-Driven Anthropocene: Killing Ourselves and Everything Else with Heatwaves


June 2018
Already Hot Lands Getting Much Hotter: Florides to FRY in HEATWAVES


May 2018
Nighttime temps rising quickest


Sept 2017
Hottest and Hotter Years Almost Every Year



More Heatwave Research

June 2019
Africa to Fry Under Any of the Current Climate "Scenarios"

Aug 2018
2018 Climate Change News: North China Plain Rapidly Becoming Uninhabitable


KARMA IS COMING: Global Warming Will Fry the Whole Middle East


Climate Crash News, Weird Weather: Heat Wave-a-topia, More Heat Waves Coming

Extreme Weather Increasing

Melbourne and Sydney should prepare for 123 degrees F

What a year: Extreme heat, rain, record number of 100-degree days

Scripps says climate change may represent "existential" threat to humanity

Continuing Hottest Records Shattered


Future Prospects


Climate Change News. Not an Improving Situation: Improved Climate Modeling Sees the Grim Future of the US: More Extremes Here

Worse Models Fit Reality the Best?

Two Degrees Already Baked In

Improved Models Show Grim Future




News of Man & Nature, September 2019








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climate change, global warming, news, research, concurrent, drought, soil drought, aridity, atmospheric aridity, feedback loop


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