Anthropogenic Warming Has Ushered in an Era of Temperature-dominated Droughts in the Western United States

Overview

Journal Sci Adv

Specialties Biology
Science

Date 2024 Nov 6

PMID 39504363

Authors

Yizhou Zhuang

Rong Fu

Joel Lisonbee

Amanda M Sheffield

Britt A Parker

Genoveva Deheza

Affiliations

Soon will be listed here.

Abstract

Historically, meteorological drought in the western United States (WUS) has been driven primarily by precipitation deficits. However, our observational analysis shows that, since around 2000, rising surface temperature and the resulting high evaporative demand have contributed more to drought severity (62%) and coverage (66%) over the WUS than precipitation deficit. This increase in evaporative demand during droughts, mostly attributable to anthropogenic warming according to analyses of both observations and climate model simulations, is the main cause of the increased drought severity and coverage. The unprecedented 2020-2022 WUS drought exemplifies this shift in drought drivers, with high evaporative demand accounting for 61% of its severity, compared to 39% from precipitation deficit. Climate model simulations corroborate this shift and project that, under the fossil-fueled development scenario (SSP5-8.5), droughts like the 2020-2022 event will transition from a one-in-more-than-a-thousand-year event in the pre-2022 period to a 1-in-60-year event by the mid-21st century and to a 1-in-6-year event by the late-21st century.

References

Dobrowski S, Abatzoglou J, Swanson A, Greenberg J, Mynsberge A, Holden Z . The climate velocity of the contiguous United States during the 20th century. Glob Chang Biol. 2013; 19(1):241-51. DOI: 10.1111/gcb.12026. View

Faranda D, Messori G, Jezequel A, Vrac M, Yiou P . Atmospheric circulation compounds anthropogenic warming and impacts of climate extremes in Europe. Proc Natl Acad Sci U S A. 2023; 120(13):e2214525120. PMC: 10068780. DOI: 10.1073/pnas.2214525120. View

Swain D, Horton D, Singh D, Diffenbaugh N . Trends in atmospheric patterns conducive to seasonal precipitation and temperature extremes in California. Sci Adv. 2016; 2(4):e1501344. PMC: 4820386. DOI: 10.1126/sciadv.1501344. View

Miralles D, Gentine P, Seneviratne S, Teuling A . Land-atmospheric feedbacks during droughts and heatwaves: state of the science and current challenges. Ann N Y Acad Sci. 2018; 1436(1):19-35. PMC: 6378599. DOI: 10.1111/nyas.13912. View

Zhou S, Williams A, Berg A, Cook B, Zhang Y, Hagemann S . Land-atmosphere feedbacks exacerbate concurrent soil drought and atmospheric aridity. Proc Natl Acad Sci U S A. 2019; 116(38):18848-18853. PMC: 6754607. DOI: 10.1073/pnas.1904955116. View

Martin J, Pederson G, Woodhouse C, Cook E, McCabe G, Anchukaitis K . Increased drought severity tracks warming in the United States' largest river basin. Proc Natl Acad Sci U S A. 2020; 117(21):11328-11336. PMC: 7260967. DOI: 10.1073/pnas.1916208117. View

Grossiord C, Buckley T, Cernusak L, Novick K, Poulter B, Siegwolf R . Plant responses to rising vapor pressure deficit. New Phytol. 2020; 226(6):1550-1566. DOI: 10.1111/nph.16485. View

Schwalm C, Glendon S, Duffy P . RCP8.5 tracks cumulative CO emissions. Proc Natl Acad Sci U S A. 2020; 117(33):19656-19657. PMC: 7443890. DOI: 10.1073/pnas.2007117117. View

Huang S, Leng G, Huang Q, Xie Y, Liu S, Meng E . The asymmetric impact of global warming on US drought types and distributions in a large ensemble of 97 hydro-climatic simulations. Sci Rep. 2017; 7(1):5891. PMC: 5517487. DOI: 10.1038/s41598-017-06302-z. View

10.

Zhuang Y, Fu R, Santer B, Dickinson R, Hall A . Quantifying contributions of natural variability and anthropogenic forcings on increased fire weather risk over the western United States. Proc Natl Acad Sci U S A. 2021; 118(45). PMC: 8609294. DOI: 10.1073/pnas.2111875118. View

11.

Horton D, Johnson N, Singh D, Swain D, Rajaratnam B, Diffenbaugh N . Contribution of changes in atmospheric circulation patterns to extreme temperature trends. Nature. 2015; 522(7557):465-9. DOI: 10.1038/nature14550. View

12.

Chiang F, Mazdiyasni O, Aghakouchak A . Evidence of anthropogenic impacts on global drought frequency, duration, and intensity. Nat Commun. 2021; 12(1):2754. PMC: 8115225. DOI: 10.1038/s41467-021-22314-w. View

13.

Abatzoglou J, Williams A . Impact of anthropogenic climate change on wildfire across western US forests. Proc Natl Acad Sci U S A. 2016; 113(42):11770-11775. PMC: 5081637. DOI: 10.1073/pnas.1607171113. View

14.

Stevenson S, Coats S, Touma D, Cole J, Lehner F, Fasullo J . Twenty-first century hydroclimate: A continually changing baseline, with more frequent extremes. Proc Natl Acad Sci U S A. 2022; 119(12):e2108124119. PMC: 8944869. DOI: 10.1073/pnas.2108124119. View

15.

Fontes C, Dawson T, Jardine K, McDowell N, Gimenez B, Anderegg L . Dry and hot: the hydraulic consequences of a climate change-type drought for Amazonian trees. Philos Trans R Soc Lond B Biol Sci. 2018; 373(1760). PMC: 6178441. DOI: 10.1098/rstb.2018.0209. View

16.

Harris I, Osborn T, Jones P, Lister D . Version 4 of the CRU TS monthly high-resolution gridded multivariate climate dataset. Sci Data. 2020; 7(1):109. PMC: 7125108. DOI: 10.1038/s41597-020-0453-3. View

17.

Diffenbaugh N, Swain D, Touma D . Anthropogenic warming has increased drought risk in California. Proc Natl Acad Sci U S A. 2015; 112(13):3931-6. PMC: 4386330. DOI: 10.1073/pnas.1422385112. View

18.

Moore G, Edgar C, Vogel J, Washington-Allen R, March R, Zehnder R . Tree mortality from an exceptional drought spanning mesic to semiarid ecoregions. Ecol Appl. 2016; 26(2):602-11. DOI: 10.1890/15-0330. View

19.

Grotjahn R, Huynh J . Contiguous US summer maximum temperature and heat stress trends in CRU and NOAA Climate Division data plus comparisons to reanalyses. Sci Rep. 2018; 8(1):11146. PMC: 6057947. DOI: 10.1038/s41598-018-29286-w. View

20.

Hartmann H, Adams H, Anderegg W, Jansen S, Zeppel M . Research frontiers in drought-induced tree mortality: crossing scales and disciplines. New Phytol. 2015; 205(3):965-969. DOI: 10.1111/nph.13246. View