Current:Home > ContactExtreme floods and droughts worsening with climate change, study finds-DB Wealth Institute B2 Reviews & Ratings
Extreme floods and droughts worsening with climate change, study finds
lotradecoin partnership announcements View Date:2024-12-25 15:53:02
The intensity of extreme drought and rainfall has "sharply" increased over the past 20 years, according to a study published Monday in the journal Nature Water. These aren't merely tough weather events, they are leading to extremes such as crop failure, infrastructure damage, even humanitarian crises and conflict.
The big picture on water comes from data from a pair of satellites known as GRACE, or Gravity Recovery and Climate Experiment, that were used to measure changes in Earth's water storage — the sum of all the water on and in the land, including groundwater, surface water, ice, and snow.
"It's incredible that we can now monitor the pulse of continental water from outer space," said Park Williams, a bioclimatologist at the University of California, Los Angeles who was not involved with the study.
"I have a feeling when future generations look back and try to determine when humanity really began understanding the planet as a whole, this will be one of the studies highlighted," he said.
The researchers say the data confirms that both frequency and intensity of rainfall and droughts are increasing due to burning fossil fuels and other human activity that releases greenhouse gases.
- The Invisible Problem: Understanding how carbon is warming the Earth
"I was surprised to see how well correlated the global intensity was with global mean temperatures," said Matthew Rodell, study author and deputy director of Earth sciences for hydrosphere, biosphere, and geophysics at NASA Goddard Space Flight Center.
The strong link between these climate extremes and rising global average temperatures means continued global warming will mean more drought and rainstorms that are worse by many measures — more frequent, more severe, longer and larger.
Researchers looked at 1,056 events from 2002-2021 using a novel algorithm that identifies where the land is much wetter or drier than normal.
That showed the most extreme rains keep happening in sub-Saharan Africa, at least through December 2021, the end of the data. The rainfall extremes also took place in central and eastern North America from 2018-2021, and Australia during 2011-2012.
The most intense droughts were a record-breaking one in northeastern South America from 2015-2016; an event in the Cerrado region of Brazil that began in 2019 and continues; and the ongoing drought in the American Southwest that has caused dangerously low water levels in two of the biggest U.S. reservoirs, Lake Mead and Lake Powell. Those remain low despite heavy rains this year.
Drought events outnumbered heavy rain events by 10%. Their geographic extents and how long they lasted were similar.
A warmer atmosphere increases the rate at which water evaporates during dry periods. It also holds more water vapor, which fuels heavy rainfall events.
The study noted that infrastructure like airports and sewage treatment plants that were designed to withstand once-in-a-100-year events are becoming more challenged as these extremes happen more often and with more intensity.
"Looking forward into the future, in terms of managing water resources and flood control, we should be anticipating that the wetter extremes will be wetter and the dry extremes will get drier," said Richard Seager, a climate scientist at the Lamont Doherty Earth Observatory at Columbia University, who was not involved with the study.
Seager said it's a mistake to assume that future wet and dry extremes can be managed the same as in the past because "everything's going to get amplified on both ends of the dry-wet spectrum."
According to the U.S. National Integrated Drought Information System, 20% of the annual economic losses from extreme weather events in the U.S. are from floods and droughts.
In 2022, the U.S. alone experienced 18 extreme weather events that each caused damage of $1 billion or more. That included the toll from Hurricane Ian, the third costliest U.S. hurricane on record, with $112.9 billion in damage and over 100 deaths, and by $22.2 billion in damage from the drought stretching across much of the West and Midwest.
Lake Mead, the nation's largest reservoir by volume, which spans the Nevada-Arizona border, sank to record-low water levels last summer.
But after years of growing concerns about the megadrought in the West threatening water supplies, a relentless series of storms driven by atmospheric rivers in recent weeks dumped huge amounts of rain and snowfall across California.
A drastic swing between extreme drought and unprecedented flooding, dubbed "weather whiplash," is becoming common in some regions.
Water stress is expected to significantly affect poor, disenfranchised communities as well as ecosystems that have been underfunded and exploited.
For example, the United Nations has said that Somalia is experiencing its longest and most severe drought, an event that has caused the deaths of millions of livestock and widespread hunger. Venezuela, a country that has faced years of political and economic crises, resorted to nationwide power cuts during April 2016 as a result of the drought conditions affecting water levels of the Guri Dam.
As for solutions, using floodwaters to replenish depleted aquifers and improving the health of agricultural soil so it can absorb water better and store more carbon are just a few methods that could improve water resiliency in a warming world, the study says.
- In:
- Climate Change
- Science
- Flooding
- Drought
veryGood! (4111)
Related
- Get Designer Michael Kors Bags on Sale Including a $398 Purse for $59 & More Deals Starting at $49
- Suspected arson attack in Nice, France kills 7 members of same family, including 3 children
- Too old to work? Some Americans on the job late in life bristle at calls for Biden to step aside
- Judge turns down ex-Rep. George Santos’ request to nix some charges ahead of fraud trial
- Judge tells Google to brace for shakeup of Android app store as punishment for running a monopoly
- Detroit’s giant slide is back. There will probably be fewer bruises this time
- U.S. journalist Evan Gershkovich's trial resumes in Russia on spying charges roundly denounced as sham
- 'Skywalkers' looks at dangerous sport of climbing tall buildings, illegally
- As Baltimore’s Sewer System Buckles Under Extreme Weather, City Refuses to Help Residents With Cleanup Efforts
- Three courts agree that a woman deemed wrongfully convicted should be freed. She still isn’t.
Ranking
- White House says deals struck to cut prices of popular Medicare drugs that cost $50 billion yearly
- Adidas Apologizes for Bella Hadid Ad Campaign Referencing 1972 Munich Olympics
- Get an Extra 70% Off J.Crew Sale Styles, an Extra 20% Off Pottery Barn Clearance & More Weekend Deals
- FACT FOCUS: A look at claims made at the Republican National Convention as Trump accepts nomination
- What Conservation Coalitions Have Learned from an Aspen Tree
- A History of Kim Kardashian and Ivanka Trump's Close Friendship
- Tech outage halts surgeries, medical treatments across the US
- Rachel Lindsay's Ex Bryan Abasolo Says He Was “Psychologically Beaten Down Before Meeting Divorce Coach
Recommendation
-
Charlie Sheen’s Daughter Sami Sheen Undergoes Plastic Surgery for Droopy Nose
-
Back-to-school shopping 2024 sales tax holidays: See which 17 states offer them.
-
Tennessee will remove HIV-positive people convicted of sex work from violent sex offender list
-
Nominations for National Guard leaders languish, triggering concerns as top officers retire
-
Police identify suspect in break-in of Trump campaign office in Virginia
-
Seattle police officer fired over vile comments after death of woman fatally struck by police SUV
-
Kylie Jenner’s Italian Vacation With Kids Stormi and Aire Is Proof They're Living La Dolce Vita
-
Rare orange lobster, found at Red Lobster, gets cool name and home at Denver aquarium