Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Brèves → Brèves 2022 → New study shows robust increases in atmospheric thirst across much of U.S. during past 40 years

New study shows robust increases in atmospheric thirst across much of U.S. during past 40 years

ScienceDaily (April 6, 2022)

Titre : New study shows robust increases in atmospheric thirst across much of U.S. during past 40 years

Largest changes centered over Rio Grande region of Southwestern U.S.

ScienceDaily (April 6, 2022)

Résumé
In arid Western states, the climate is growing warmer and drier, leading to increased demand for water resources from humans and ecosystems. Now, the atmosphere across much of the U.S. is also demanding a greater share of water than it used to, according to a new study.

The study was published in the Journal of Hydrometeorology and assessed trends in evaporative demand across the U.S. during a 40-year period from 1980-2020 using five datasets. Evaporative demand, sometimes described as "atmospheric thirst," is a measure of the potential loss of water from the earth’s surface to the atmosphere based on variables including temperature, humidity, wind speed, and solar radiation.

The team’s findings showed substantial increases in atmospheric thirst across much of the Western U.S. during the past 40 years, with the largest and most robust increases in an area centered around the Rio Grande and Lower Colorado rivers. These regions have experienced changes on the order of two-to-three standard deviations from what was seen during the baseline period of 1980-2000.

Story Source  : Desert Research Institute

Annonce (ScienceDaily)

Page publiée le 13 janvier 2023