Rapid intensification of the emerging southwestern North American megadrought in 2020–2021

Mankin, J. S. et al. NOAA Drought Task Force Report on the 2020–2021 Southwestern U.S. Drought (NOAA Drought Task Force, MAPP and NIDIS, 2021); https://www.drought.gov/sites/default/files/2021-09/NOAA-Drought-Task-Force-IV-Southwest-Drought-Report-9-23-21.pdf

H.R.2030—Colorado River Drought Contingency Plan Authorization Act (US House of Representatives, 2019); https://www.congress.gov/bill/116th-congress/house-bill/2030

Svoboda, M. et al. The Drought Monitor. Bull. Am. Meteorol. Soc. 83, 1181–1190 (2002).

Article 

Google Scholar 

Cook, E. R. et al. Megadroughts in North America: placing IPCC projections of hydroclimatic change in a long-term palaeoclimate context. J. Quat. Sci. 25, 48–61 (2010).

Article 

Google Scholar 

Williams, A. P. et al. Large contribution from anthropogenic warming to a developing North American megadrought. Science 368, 314–318 (2020).

CAS 
Article 

Google Scholar 

Cook, B. I. et al. North American megadroughts in the Common Era: reconstructions and simulations. WIREs Clim. Change 7, 411–432 (2016).

Article 

Google Scholar 

Woodhouse, C. A. & Overpeck, J. T. 2000 years of drought variability in the central United States. Bull. Am. Meteorol. Soc. 79, 2693–2714 (1998).

Article 

Google Scholar 

Breshears, D. D. et al. Regional vegetation die-off in response to global-change-type drought. Proc. Natl Acad. Sci. USA 102, 15144–15148 (2005).

CAS 
Article 

Google Scholar 

Williams, A. P. et al. Temperature as a potent driver of regional forest drought stress and tree mortality. Nat. Clim. Change 3, 292–297 (2013).

Article 

Google Scholar 

Eyring, V. et al. Overview of the Coupled Model Intercomparison Project Phase 6 (CMIP6) experimental design and organization. Geosci. Model Dev. 9, 1937–1958 (2016).

Barnett, T. P., Adam, J. C. & Lettenmaier, D. P. Potential impacts of a warming climate on water availability in snow-dominated regions. Nature 438, 303–309 (2005).

CAS 
Article 

Google Scholar 

Das, T., Pierce, D. W., Cayan, D. R., Vano, J. A. & Lettenmaier, D. P. The importance of warm season warming to western US streamflow changes. Geophys. Res. Lett. 38, L23403 (2011).

Article 

Google Scholar 

Milly, P. C. D. & Dunne, K. A. Colorado River flow dwindles as warming-driven loss of reflective snow energizes evaporation. Science 367, 1252–1255 (2020).

CAS 
Article 

Google Scholar 

Pascolini-Campbell, M., Reager, J. T., Chandanpurkar, H. A. & Rodell, M. A 10 per cent increase in global land evapotranspiration from 2003 to 2019. Nature 593, 543–547 (2021).

CAS 
Article 

Google Scholar 

Udall, B. & Overpeck, J. The twenty‐first century Colorado River hot drought and implications for the future. Water Resour. Res. 53, 2404–2418 (2017).

Article 

Google Scholar 

Cook, B. I. et al. Uncertainties, limits, and benefits of climate change mitigation for soil moisture drought in southwestern North America. Earth’s Future 9, e2021EF002014 (2021).

Article 

Google Scholar 

Ault, T. R., Mankin, J. S., Cook, B. I. & Smerdon, J. E. Relative impacts of mitigation, temperature, and precipitation on 21st-century megadrought risk in the American Southwest. Sci. Adv. 2, e1600873 (2016).

Article 

Google Scholar 

Woodhouse, C. A., Meko, D. M., MacDonald, G. M. & Stahle, D. W. A 1,200-year perspective of 21st century drought in southwestern North America. Proc. Natl Acad. Sci. USA 107, 21283–21288 (2010).

CAS 
Article 

Google Scholar 

Lepley, K. et al. A multi-century Sierra Nevada snowpack reconstruction modeled using upper-elevation coniferous tree rings (California, USA). Holocene 30, 1266–1278 (2020).

Article 

Google Scholar 

Williams, A. P. et al. Tree rings and observations suggest no stable cycles in Sierra Nevada cool-season precipitation. Water Resour. Res. 57, e2020WR028599 (2021).

Article 

Google Scholar