How the annual cycle affects the extratropical response to ENSO

Daeho Jin, Benjamin Kirtman

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The relationship between tropical remote forcing and seasonality in the extratropics is examined with a set of numerical experiments that use prescribed sea surface temperature (SST) in the tropical Pacific and a simple thermodynamic slab mixed-layer model outside the prescribed region coupled to an atmospheric general circulation model. The numerical experiments use an idealized El Nio-Southern Oscillation (ENSO) evolution where the peak phase (with respect to the annual cycle) can be arbitrarily shifted. In this case, we shift the phase of ENSO by 6 months. An ENSO composite analysis indicates that the extratropical remote response is phase locked with the local season, not ENSO. Pacific basin zonal mean cross section shows that the tropical atmosphere continuously responds to the prescribed SST forcing, but the atmospheric bridge connecting to the extratropics occurs in specific seasons.

Original languageEnglish (US)
Article numberD06102
JournalJournal of Geophysical Research C: Oceans
Volume115
Issue number6
DOIs
StatePublished - 2010

Fingerprint

Southern Oscillation
annual cycle
cycles
sea surface temperature
Experiments
Atmospheric General Circulation Models
Thermodynamics
phase response
Temperature
Composite materials
atmospheric general circulation model
mixed layer
seasonality
slab
slabs
cross section
thermodynamics
experiment
atmospheres
composite materials

ASJC Scopus subject areas

  • Atmospheric Science
  • Geophysics
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

Cite this

How the annual cycle affects the extratropical response to ENSO. / Jin, Daeho; Kirtman, Benjamin.

In: Journal of Geophysical Research C: Oceans, Vol. 115, No. 6, D06102, 2010.

Research output: Contribution to journalArticle

@article{e9b249f6300f450d835bd713875f4566,
title = "How the annual cycle affects the extratropical response to ENSO",
abstract = "The relationship between tropical remote forcing and seasonality in the extratropics is examined with a set of numerical experiments that use prescribed sea surface temperature (SST) in the tropical Pacific and a simple thermodynamic slab mixed-layer model outside the prescribed region coupled to an atmospheric general circulation model. The numerical experiments use an idealized El Nio-Southern Oscillation (ENSO) evolution where the peak phase (with respect to the annual cycle) can be arbitrarily shifted. In this case, we shift the phase of ENSO by 6 months. An ENSO composite analysis indicates that the extratropical remote response is phase locked with the local season, not ENSO. Pacific basin zonal mean cross section shows that the tropical atmosphere continuously responds to the prescribed SST forcing, but the atmospheric bridge connecting to the extratropics occurs in specific seasons.",
author = "Daeho Jin and Benjamin Kirtman",
year = "2010",
doi = "10.1029/2009JD012660",
language = "English (US)",
volume = "115",
journal = "Journal of Geophysical Research: Oceans",
issn = "2169-9275",
publisher = "Wiley-Blackwell",
number = "6",

}

TY - JOUR

T1 - How the annual cycle affects the extratropical response to ENSO

AU - Jin, Daeho

AU - Kirtman, Benjamin

PY - 2010

Y1 - 2010

N2 - The relationship between tropical remote forcing and seasonality in the extratropics is examined with a set of numerical experiments that use prescribed sea surface temperature (SST) in the tropical Pacific and a simple thermodynamic slab mixed-layer model outside the prescribed region coupled to an atmospheric general circulation model. The numerical experiments use an idealized El Nio-Southern Oscillation (ENSO) evolution where the peak phase (with respect to the annual cycle) can be arbitrarily shifted. In this case, we shift the phase of ENSO by 6 months. An ENSO composite analysis indicates that the extratropical remote response is phase locked with the local season, not ENSO. Pacific basin zonal mean cross section shows that the tropical atmosphere continuously responds to the prescribed SST forcing, but the atmospheric bridge connecting to the extratropics occurs in specific seasons.

AB - The relationship between tropical remote forcing and seasonality in the extratropics is examined with a set of numerical experiments that use prescribed sea surface temperature (SST) in the tropical Pacific and a simple thermodynamic slab mixed-layer model outside the prescribed region coupled to an atmospheric general circulation model. The numerical experiments use an idealized El Nio-Southern Oscillation (ENSO) evolution where the peak phase (with respect to the annual cycle) can be arbitrarily shifted. In this case, we shift the phase of ENSO by 6 months. An ENSO composite analysis indicates that the extratropical remote response is phase locked with the local season, not ENSO. Pacific basin zonal mean cross section shows that the tropical atmosphere continuously responds to the prescribed SST forcing, but the atmospheric bridge connecting to the extratropics occurs in specific seasons.

UR - http://www.scopus.com/inward/record.url?scp=77950104532&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77950104532&partnerID=8YFLogxK

U2 - 10.1029/2009JD012660

DO - 10.1029/2009JD012660

M3 - Article

VL - 115

JO - Journal of Geophysical Research: Oceans

JF - Journal of Geophysical Research: Oceans

SN - 2169-9275

IS - 6

M1 - D06102

ER -