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Title: ENSO's Changing Influence on Temperature, Precipitation, and Wildfire in a Warming Climate

Journal Article · · Geophysical Research Letters
DOI:https://doi.org/10.1029/2018gl079022· OSTI ID:1511151

On interannual to decadal time scales, the climate mode with many of the strongest societal impacts is the El Niño–Southern Oscillation (ENSO). However, quantifying ENSO's changes in a warming climate remains a formidable challenge, due to both the noise arising from internal variability and the complexity of air-sea feedbacks in the tropical Pacific Ocean. In this paper, we use large (≥30-member) ensembles of climate simulations to show that anthropogenic climate change can produce systematic increases in ENSO teleconnection strength over many land regions, driving increased interannual variability in regional temperature extremes and wildfire frequency. As the spatial character of this intensification exhibits strong land-ocean contrasts, a causal role for land-atmosphere feedbacks is suggested. The identified increase in variance occurs in multiple model ensembles, independent of changes in sea surface temperature variance. In conclusion, this suggests that in addition to changes in the overall likelihoods of heat and wildfire extremes, the variability in these events may also be a robust feature of future climate.

Research Organization:
University Corporation for Atmospheric Research, Boulder, CO (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0012711
OSTI ID:
1511151
Alternate ID(s):
OSTI ID: 1471133
Journal Information:
Geophysical Research Letters, Vol. 45, Issue 17; ISSN 0094-8276
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 89 works
Citation information provided by
Web of Science

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Will Landscape Fire Increase in the Future? A Systems Approach to Climate, Fire, Fuel, and Human Drivers journal February 2019
Uncovering the Pattern of Forced Sea Level Rise in the Satellite Altimeter Record journal May 2019
The Response of Tropical Organized Convection to El Niño Warming journal August 2019
Hurricanes, El Niño and harmful algal blooms in two sub-tropical Florida estuaries: Direct and indirect impacts journal February 2020
Altimeter-era emergence of the patterns of forced sea-level rise in climate models and implications for the future journal December 2018
Effects of atmospheric oscillations on infectious diseases: the case of Chagas disease in Chile journal January 2019
Event-Based Integrated Assessment of Environmental Variables and Wildfire Severity through Sentinel-2 Data journal November 2019
Asymmetric Response of Land Storage to ENSO Phase and Duration journal October 2019