Springtime ENSO phase evolution and its relation to rainfall in the continental U.S.

Sang Ki Lee, Brian E Mapes, Chunzai Wang, David B. Enfield, Scott J. Weaver

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Springtime El Niño-Southern Oscillation (ENSO) phase evolution and associated U.S. rainfall variability are explored by performing composite analysis of observational data. Although the tropical Pacific ENSO sea surface temperature anomalies are weaker and less coherent in boreal spring compared to those in winter, there are unique and significant patterns of U.S. rainfall anomalies frequently appearing during the onset and decay phases of ENSO. In early spring of a decaying El Niño, the atmospheric jet stream and associated storm track shift southward, causing more frequent wet conditions across the southern U.S. and dry conditions in a belt south and east of the Ohio River. In late spring of a developing El Niño, the synoptic activity over the U.S. reduces overall and the southwesterly low-level winds that carry moist air from the Gulf of Mexico to the U.S. shift westward, causing a similar dipole of rainfall anomalies between the southern U.S. and the Ohio Valley. Key Points Springtime ENSO phase evolution and its relation to U.S. rainfall is explored Coherent springtime ENSO SST anomalies exist in the central tropical Pacific Significant patterns of U.S. rainfall anomalies covary with ENSO phase in spring

Original languageEnglish (US)
Pages (from-to)1673-1680
Number of pages8
JournalGeophysical Research Letters
Volume41
Issue number5
DOIs
StatePublished - Mar 16 2014

Fingerprint

Southern Oscillation
rainfall
anomalies
anomaly
Ohio River (US)
sea surface temperature
Gulf of Mexico
jet stream
storm track
shift
temperature anomaly
winter
valleys
dipoles
valley
composite materials
air
decay
river

Keywords

  • ENSO evolution in spring
  • ENSO teleconnection
  • U.S. rainfall in spring

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Geophysics

Cite this

Springtime ENSO phase evolution and its relation to rainfall in the continental U.S. / Lee, Sang Ki; Mapes, Brian E; Wang, Chunzai; Enfield, David B.; Weaver, Scott J.

In: Geophysical Research Letters, Vol. 41, No. 5, 16.03.2014, p. 1673-1680.

Research output: Contribution to journalArticle

Lee, Sang Ki ; Mapes, Brian E ; Wang, Chunzai ; Enfield, David B. ; Weaver, Scott J. / Springtime ENSO phase evolution and its relation to rainfall in the continental U.S. In: Geophysical Research Letters. 2014 ; Vol. 41, No. 5. pp. 1673-1680.
@article{3981c63bc8f544f19c2aba5cb5038fa7,
title = "Springtime ENSO phase evolution and its relation to rainfall in the continental U.S.",
abstract = "Springtime El Ni{\~n}o-Southern Oscillation (ENSO) phase evolution and associated U.S. rainfall variability are explored by performing composite analysis of observational data. Although the tropical Pacific ENSO sea surface temperature anomalies are weaker and less coherent in boreal spring compared to those in winter, there are unique and significant patterns of U.S. rainfall anomalies frequently appearing during the onset and decay phases of ENSO. In early spring of a decaying El Ni{\~n}o, the atmospheric jet stream and associated storm track shift southward, causing more frequent wet conditions across the southern U.S. and dry conditions in a belt south and east of the Ohio River. In late spring of a developing El Ni{\~n}o, the synoptic activity over the U.S. reduces overall and the southwesterly low-level winds that carry moist air from the Gulf of Mexico to the U.S. shift westward, causing a similar dipole of rainfall anomalies between the southern U.S. and the Ohio Valley. Key Points Springtime ENSO phase evolution and its relation to U.S. rainfall is explored Coherent springtime ENSO SST anomalies exist in the central tropical Pacific Significant patterns of U.S. rainfall anomalies covary with ENSO phase in spring",
keywords = "ENSO evolution in spring, ENSO teleconnection, U.S. rainfall in spring",
author = "Lee, {Sang Ki} and Mapes, {Brian E} and Chunzai Wang and Enfield, {David B.} and Weaver, {Scott J.}",
year = "2014",
month = "3",
day = "16",
doi = "10.1002/2013GL059137",
language = "English (US)",
volume = "41",
pages = "1673--1680",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "American Geophysical Union",
number = "5",

}

TY - JOUR

T1 - Springtime ENSO phase evolution and its relation to rainfall in the continental U.S.

AU - Lee, Sang Ki

AU - Mapes, Brian E

AU - Wang, Chunzai

AU - Enfield, David B.

AU - Weaver, Scott J.

PY - 2014/3/16

Y1 - 2014/3/16

N2 - Springtime El Niño-Southern Oscillation (ENSO) phase evolution and associated U.S. rainfall variability are explored by performing composite analysis of observational data. Although the tropical Pacific ENSO sea surface temperature anomalies are weaker and less coherent in boreal spring compared to those in winter, there are unique and significant patterns of U.S. rainfall anomalies frequently appearing during the onset and decay phases of ENSO. In early spring of a decaying El Niño, the atmospheric jet stream and associated storm track shift southward, causing more frequent wet conditions across the southern U.S. and dry conditions in a belt south and east of the Ohio River. In late spring of a developing El Niño, the synoptic activity over the U.S. reduces overall and the southwesterly low-level winds that carry moist air from the Gulf of Mexico to the U.S. shift westward, causing a similar dipole of rainfall anomalies between the southern U.S. and the Ohio Valley. Key Points Springtime ENSO phase evolution and its relation to U.S. rainfall is explored Coherent springtime ENSO SST anomalies exist in the central tropical Pacific Significant patterns of U.S. rainfall anomalies covary with ENSO phase in spring

AB - Springtime El Niño-Southern Oscillation (ENSO) phase evolution and associated U.S. rainfall variability are explored by performing composite analysis of observational data. Although the tropical Pacific ENSO sea surface temperature anomalies are weaker and less coherent in boreal spring compared to those in winter, there are unique and significant patterns of U.S. rainfall anomalies frequently appearing during the onset and decay phases of ENSO. In early spring of a decaying El Niño, the atmospheric jet stream and associated storm track shift southward, causing more frequent wet conditions across the southern U.S. and dry conditions in a belt south and east of the Ohio River. In late spring of a developing El Niño, the synoptic activity over the U.S. reduces overall and the southwesterly low-level winds that carry moist air from the Gulf of Mexico to the U.S. shift westward, causing a similar dipole of rainfall anomalies between the southern U.S. and the Ohio Valley. Key Points Springtime ENSO phase evolution and its relation to U.S. rainfall is explored Coherent springtime ENSO SST anomalies exist in the central tropical Pacific Significant patterns of U.S. rainfall anomalies covary with ENSO phase in spring

KW - ENSO evolution in spring

KW - ENSO teleconnection

KW - U.S. rainfall in spring

UR - http://www.scopus.com/inward/record.url?scp=84894721797&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84894721797&partnerID=8YFLogxK

U2 - 10.1002/2013GL059137

DO - 10.1002/2013GL059137

M3 - Article

VL - 41

SP - 1673

EP - 1680

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

IS - 5

ER -