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Title: Maximizing ENSO as a source of western US hydroclimate predictability

Journal Article · · Climate Dynamics

Abstract Until recently, the El Niño–Southern Oscillation (ENSO) was considered a reliable source of winter precipitation predictability in the western US, with a historically strong link between extreme El Niño events and extremely wet seasons. However, the 2015–2016 El Niño challenged our understanding of the ENSO-precipitation relationship. California precipitation was near-average during the 2015–2016 El Niño, which was characterized by warm sea surface temperature (SST) anomalies of similar magnitude compared to the extreme 1997–1998 and 1982–1983 El Niño events. We demonstrate that this precipitation response can be explained by El Niño’s spatial pattern, rather than internal atmospheric variability. In addition, observations and large-ensembles of regional and global climate model simulations indicate that extremes in seasonal and daily precipitation during strong El Niño events are better explained using the ENSO Longitude Index (ELI), which captures the diversity of ENSO’s spatial patterns in a single metric, compared to the traditional Niño3.4 index, which measures SST anomalies in a fixed region and therefore fails to capture ENSO diversity. The physically-based ELI better explains western US precipitation variability because it tracks the zonal shifts in tropical Pacific deep convection that drive teleconnections through the response in the extratropical wave-train, integrated vapor transport, and atmospheric rivers. This research provides evidence that ELI improves the value of ENSO as a predictor of California’s seasonal hydroclimate extremes compared to traditional ENSO indices, especially during strong El Niño events.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23), Climate and Environmental Sciences Division (SC-23.1 )
Grant/Contract Number:
AC02-05CH11231; SC0016605
OSTI ID:
1619322
Alternate ID(s):
OSTI ID: 1581377
Journal Information:
Climate Dynamics, Journal Name: Climate Dynamics Vol. 54 Journal Issue: 1-2; ISSN 0930-7575
Publisher:
Springer Science + Business MediaCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 40 works
Citation information provided by
Web of Science

References (97)

Defining Snow Drought and Why It Matters journal February 2017
A comparative evaluation of impact of domain size and parameterization scheme on simulation of tropical cyclones in the Bay of Bengal: DOMAIN SIZE AND PARAMETERIZATION SCHEME journal January 2014
Predictable and Unpredictable Aspects of U.S. West Coast Rainfall and El Niño: Understanding the 2015/16 Event journal May 2019
The Uneven Response of Different Snow Measures to Human-Induced Climate Warming journal June 2013
Predictability and Prediction of Southern California Rains during Strong El Niño Events: A Focus on the Failed 2016 Winter Rains journal January 2018
Winter 2015/16 Atmospheric and Precipitation Anomalies over North America: El Niño Response and the Role of Noise journal March 2018
The Northern Hemisphere Extratropical Atmospheric Circulation Response to ENSO: How Well Do We Know It and How Do We Evaluate Models Accordingly? journal July 2017
The Atmospheric Bridge: The Influence of ENSO Teleconnections on Air–Sea Interaction over the Global Oceans journal August 2002
El Niño, La Niña, and the Nonlinearity of Their Teleconnections journal August 1997
Increasing precipitation volatility in twenty-first-century California journal April 2018
The impact of global warming on the tropical Pacific Ocean and El Niño journal May 2010
Planetary-Scale Atmospheric Phenomena Associated with the Southern Oscillation journal April 1981
Observing and Predicting the 2015/16 El Niño journal July 2017
Extreme California Rains During Winter 2015/16: A Change in El Niño Teleconnection? journal January 2018
The Global Precipitation Climatology Project (GPCP) Combined Precipitation Dataset journal January 1997
A composite study of the MJO influence on the surface air temperature and precipitation over the Continental United States journal February 2011
Tropical Pacific Ocean heat content variations and ENSO persistence barriers journal January 2003
Projected increases and shifts in rain-on-snow flood risk over western North America journal August 2018
Extended Reconstructed Sea Surface Temperature, Version 5 (ERSSTv5): Upgrades, Validations, and Intercomparisons journal October 2017
Quantifying the effect of interannual ocean variability on the attribution of extreme climate events to human influence journal January 2017
NCEP–DOE AMIP-II Reanalysis (R-2) journal November 2002
Understanding ENSO Diversity journal June 2015
Dynamics of Landfalling Atmospheric Rivers over the North Pacific in 30 Years of MERRA Reanalysis journal September 2014
Prediction of the Midlatitude Response to Strong Madden-Julian Oscillation Events on S2S Time Scales: PREDICTION OF Z500 AT S2S TIME SCALES journal January 2018
How Well Do We Know ENSO’s Climate Impacts over North America, and How Do We Evaluate Models Accordingly? journal July 2018
Dramatic declines in snowpack in the western US journal March 2018
ENSO in the CMIP5 Simulations: Life Cycles, Diversity, and Responses to Climate Change journal January 2017
Locking of El Niño’s Peak Time to the End of the Calendar Year in the Delayed Oscillator Picture of ENSO journal September 1998
ENSO as an Integrating Concept in Earth Science journal December 2006
Diversity of ENSO Events Unified by Convective Threshold Sea Surface Temperature: A Nonlinear ENSO Index journal September 2018
TempestExtremes: a framework for scale-insensitive pointwise feature tracking on unstructured grids journal January 2017
Attribution of Declining Western U.S. Snowpack to Human Effects journal December 2008
ARTMIP-early start comparison of atmospheric river detection tools: how many atmospheric rivers hit northern California’s Russian River watershed? journal September 2018
A basis set for exploration of sensitivity to prescribed ocean conditions for estimating human contributions to extreme weather in CAM5.1-1degree journal March 2018
Increasing western US forest wildfire activity: sensitivity to changes in the timing of spring journal June 2016
The Modern-Era Retrospective Analysis for Research and Applications, Version 2 (MERRA-2) journal July 2017
ENSO Diversity from an Atmospheric Perspective journal June 2019
Recent progress on two types of El Niño: Observations, dynamics, and future changes journal January 2014
The Relationship between California Rainfall and ENSO Events journal November 1989
Drought triggered tree mortality in mixed conifer forests in Yosemite National Park, California, USA journal October 2005
ERA-20C: An Atmospheric Reanalysis of the Twentieth Century journal June 2016
Changes in atmospheric rivers and moisture transport over the Northeast Pacific and western North America in response to ENSO diversity journal March 2017
El Niño–Southern Oscillation complexity journal July 2018
Atmospheric Response Patterns Associated with Tropical Forcing journal August 2002
Winter Storm Conditions Leading to Excessive Runoff above California’s Oroville Dam during January and February 2017 journal January 2019
What is the variability in US west coast winter precipitation during strong El Niño events? journal December 2016
Roles of SST versus Internal Atmospheric Variability in Winter Extreme Precipitation Variability along the U.S. West Coast journal October 2018
An Overview of the Global Historical Climatology Network-Daily Database journal July 2012
Assessment of precipitation anomalies in California using TRMM and MERRA data journal August 2015
Declining Mountain Snowpack in Western North America* journal January 2005
Slower snowmelt in a warmer world journal February 2017
A Proposed Algorithm for Moisture Fluxes from Atmospheric Rivers journal March 1998
ATMOSPHERIC TELECONNECTIONS FROM THE EQUATORIAL PACIFIC 1 journal March 1969
Metrics for understanding large-scale controls of multivariate temperature and precipitation variability journal April 2019
Atmospheric Rivers, Floods and the Water Resources of California journal March 2011
Improved Historical Temperature and Precipitation Time Series for U.S. Climate Divisions journal May 2014
Seasonal Noise Versus Subseasonal Signal: Forecasts of California Precipitation During the Unusual Winters of 2015-2016 and 2016-2017: S2S Forecast of CA Precipitation journal September 2017
Hydrometeorological characteristics of rain‐on‐snow events associated with atmospheric rivers journal March 2016
Western U.S. Extreme Precipitation Events and Their Relation to ENSO and PDO in CCSM4 journal June 2013
Global patterns of ENSO-induced precipitation journal May 2000
Mountain hydrology of the western United States: MOUNTAIN HYDROLOGY OF THE WESTERN US journal August 2006
The importance of ENSO nonlinearities in tropical pacific response to external forcing journal December 2016
Potential for western US seasonal snowpack prediction journal January 2018
ENSO Atmospheric Teleconnections and Their Response to Greenhouse Gas Forcing journal February 2018
Global Climatic Anomalies Associated with Extremes in the Southern Oscillation journal September 1989
A probabilistic gridded product for daily precipitation extremes over the United States journal February 2019
The Global Precipitation Climatology Project (GPCP) Monthly Analysis (New Version 2.3) and a Review of 2017 Global Precipitation journal April 2018
Linking Atmospheric River Hydrological Impacts on the U.S. West Coast to Rossby Wave Breaking journal May 2017
Assessing the climate-scale variability of atmospheric rivers affecting western North America: Atmospheric River Climate-Scale Behavior journal August 2017
All-Season Climatology and Variability of Atmospheric River Frequencies over the North Pacific journal July 2016
Tropical Ocean Contributions to California’s Surprisingly Dry El Niño of 2015/16 journal December 2017
On the Fragile Relationship Between El Niño and California Rainfall journal January 2018
ENSO representation in climate models: from CMIP3 to CMIP5 journal April 2013
GPCC Full Data Reanalysis Version 7.0: Monthly Land-Surface Precipitation from Rain Gauges built on GTS based and Historic Data dataset January 2016
ENSO and Hydrologic Extremes in the Western United States* journal September 1999
Transients and the Extratropical Response to El Niño journal January 1989
An Improved In Situ and Satellite SST Analysis for Climate journal July 2002
Projecting 21st century snowpack trends in western USA mountains using variable-resolution CESM journal March 2017
Climatological Characteristics of Atmospheric Rivers and Their Inland Penetration over the Western United States journal February 2014
A time-split nonhydrostatic atmospheric model for weather research and forecasting applications journal March 2008
Cold Tongue and Warm Pool ENSO Events in CMIP5: Mean State and Future Projections journal April 2014
Does El Niño intensity matter for California precipitation? journal January 2016
Characterizing the influence of atmospheric river orientation and intensity on precipitation distributions over North Coastal California: ARs and Precipitation Over North Coastal CA journal September 2017
Atmospheric River Tracking Method Intercomparison Project (ARTMIP): project goals and experimental design journal January 2018
Interannual Climate Variability and Snowpack in the Western United States journal May 1996
The ‘spring predictability barrier’ for ENSO predictions and its possible mechanism: results from a fully coupled model journal May 2012
A Scale to Characterize the Strength and Impacts of Atmospheric Rivers journal February 2019
Global and Regional Scale Precipitation Patterns Associated with the El Niño/Southern Oscillation journal August 1987
Prediction of atmospheric rivers over the North Pacific and its connection to ENSO in the North American multi-model ensemble (NMME) journal November 2017
Extreme snowfall events linked to atmospheric rivers and surface air temperature via satellite measurements: EXTREME SNOWFALL AND ATMOSPHERIC RIVERS journal October 2010
El Niño's impact on California precipitation: seasonality, regionality, and El Niño intensity journal May 2016
Understanding El Niño in Ocean–Atmosphere General Circulation Models: Progress and Challenges journal March 2009
Tropical Influences on California Precipitation journal March 1998
Causes of recent changes in western North American snowpack journal May 2011
NCEP–DOE AMIP-II Reanalysis (R-2) journal November 2002
An Introduction to Statistical Modeling of Extreme Values journal November 2002
El Niño's impact on California precipitation: seasonality, regionality, and El Niño intensity text January 2016

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