Evolving Impacts of Multiyear La Niña Events on Atmospheric Circulation and U.S. Drought

Okumura, Yuko M.; DiNezio, Pedro; Deser, Clara

doi:10.1002/2017GL075034

i

Evolving Impacts of Multiyear La Niña Events on Atmospheric Circulation and U.S. Drought

2017
By Okumura, Yuko M. ; DiNezio, Pedro ; Deser, Clara
Source Geophysical Research Letters 44(22): 11614-11623, 2017

Details

Journal Title:

Geophysical Research Letters
Personal Author:

Okumura, Yuko M. ; DiNezio, Pedro ; Deser, Clara
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; CPO (Climate Program Office)
Description:

Wintertime precipitation over the southern U.S. is known to decrease with interannual cooling of the equatorial Pacific associated with La Niña, which often persists 2 years or longer. Composite analysis based on a suite of observational and reanalysis data sets covering the period 1901–2012 reveals distinct evolution of atmospheric teleconnections and U.S. precipitation anomalies during multiyear La Niña events. In particular, atmospheric circulation anomalies strengthen and become more zonally elongated over the North Pacific in the second winter compared to the first winter. U.S. precipitation deficits also remain large, while the region of reduced precipitation shifts northeastward in the second winter. This occurs despite a significant weakening of the equatorial Pacific cooling in the second winter and suggests that the large‐scale atmospheric circulation is more sensitive to tropical sea surface temperature anomalies of broader meridional extent. Given the extended climatic impacts, accurate prediction of La Niña duration is crucial.
Source:

Geophysical Research Letters 44(22): 11614-11623, 2017
DOI:

https://doi.org/10.1002/2017GL075034
Document Type:

Journal Article
Funding:

Grant no. NA16OAR4310201 ; Grant no. NA14OAR4310227 ; Grant no. NA14OAR4310228 ; Grant no. NA14OAR4310229 ; Grant no. NA17OAR4310149 ; Grant no. NA17OAR4310145
Place as Subject:

United States
Rights Information:

Other
Compliance:

Submitted
Download URL:

https://repository.library.noaa.gov/view/noaa/28205/noaa_28205_DS1.pdf
File Type:

[PDF - 3.22 MB]
Collection(s):

Office of Oceanic and Atmospheric Research (OAR)
Main Document Checksum:

urn:sha256:3a70ea6c20d48ac83e10fc18df66cad83e688ce07d37cddac97c6c3cf08a288e

ON THIS PAGE

Details Related Documents

Found an issue?

Send us an email at:

publishinghd@cdc.gov

The NOAA IR serves as an archival repository of NOAA-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by NOAA or funded partners. As a repository, the NOAA IR retains documents in their original published format to ensure public access to scientific information.