Atmosphere-ocean coupled process along coastal areas of the Yellow and East China seas in winter

Shinsuke Iwasaki, Atsuhiko Isobe, Shin'Ichiro Kako

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

A regional atmosphere-ocean coupled model is developed, based on the Pennsylvania State University- National Center for Atmospheric Research Mesoscale Model in conjunction with the Princeton Ocean Model, to investigate atmosphere-ocean coupled processes that might occur over the Yellow and East China Sea shelves in winter. To examine how the coupled processes actually work in the ocean, sea surface temperatures (SSTs) computed in both coupled and uncoupled models are compared with SSTs synthesized from multiple satellite observations. The results indicate that the coupled model significantly improves the negative SST bias in shallow waters around the Chinese coast produced by the uncoupled model. Cool and dry northerly winds from the Asian landmass reduce SST in these shallow waters through intensive upward heat loss. Thereafter, the horizontal gradient of sea level pressure (SLP) around the Chinese coast moderates because the land-ocean heat contrast weakens owing to the reduced SST in the coastal waters. As a result, the wind speed weakens, in line with the moderated horizontal SLP gradient. Moreover, northerly winds can reduce the transport of cool and dry air from the Asian landmass. Hence, upward heat flux around the coastal waters is reduced because of the weakening of the northerly winds and the decreased cool and dry air. This negative feedback thereby suppresses excessive SST cooling along the Chinese coast during winter.

Original languageEnglish
Pages (from-to)155-167
Number of pages13
JournalJournal of Climate
Volume27
Issue number1
DOIs
Publication statusPublished - Jan 1 2014

Fingerprint

sea surface temperature
atmosphere
winter
ocean
sea level pressure
coastal water
coast
shallow water
shelf sea
air
pressure gradient
heat flux
sea
coastal area
wind velocity
cooling

All Science Journal Classification (ASJC) codes

  • Atmospheric Science

Cite this

Atmosphere-ocean coupled process along coastal areas of the Yellow and East China seas in winter. / Iwasaki, Shinsuke; Isobe, Atsuhiko; Kako, Shin'Ichiro.

In: Journal of Climate, Vol. 27, No. 1, 01.01.2014, p. 155-167.

Research output: Contribution to journalArticle

@article{b61e745a134e4f59bd349a0214bd9b58,
title = "Atmosphere-ocean coupled process along coastal areas of the Yellow and East China seas in winter",
abstract = "A regional atmosphere-ocean coupled model is developed, based on the Pennsylvania State University- National Center for Atmospheric Research Mesoscale Model in conjunction with the Princeton Ocean Model, to investigate atmosphere-ocean coupled processes that might occur over the Yellow and East China Sea shelves in winter. To examine how the coupled processes actually work in the ocean, sea surface temperatures (SSTs) computed in both coupled and uncoupled models are compared with SSTs synthesized from multiple satellite observations. The results indicate that the coupled model significantly improves the negative SST bias in shallow waters around the Chinese coast produced by the uncoupled model. Cool and dry northerly winds from the Asian landmass reduce SST in these shallow waters through intensive upward heat loss. Thereafter, the horizontal gradient of sea level pressure (SLP) around the Chinese coast moderates because the land-ocean heat contrast weakens owing to the reduced SST in the coastal waters. As a result, the wind speed weakens, in line with the moderated horizontal SLP gradient. Moreover, northerly winds can reduce the transport of cool and dry air from the Asian landmass. Hence, upward heat flux around the coastal waters is reduced because of the weakening of the northerly winds and the decreased cool and dry air. This negative feedback thereby suppresses excessive SST cooling along the Chinese coast during winter.",
author = "Shinsuke Iwasaki and Atsuhiko Isobe and Shin'Ichiro Kako",
year = "2014",
month = "1",
day = "1",
doi = "10.1175/JCLI-D-13-00117.1",
language = "English",
volume = "27",
pages = "155--167",
journal = "Journal of Climate",
issn = "0894-8755",
publisher = "American Meteorological Society",
number = "1",

}

TY - JOUR

T1 - Atmosphere-ocean coupled process along coastal areas of the Yellow and East China seas in winter

AU - Iwasaki, Shinsuke

AU - Isobe, Atsuhiko

AU - Kako, Shin'Ichiro

PY - 2014/1/1

Y1 - 2014/1/1

N2 - A regional atmosphere-ocean coupled model is developed, based on the Pennsylvania State University- National Center for Atmospheric Research Mesoscale Model in conjunction with the Princeton Ocean Model, to investigate atmosphere-ocean coupled processes that might occur over the Yellow and East China Sea shelves in winter. To examine how the coupled processes actually work in the ocean, sea surface temperatures (SSTs) computed in both coupled and uncoupled models are compared with SSTs synthesized from multiple satellite observations. The results indicate that the coupled model significantly improves the negative SST bias in shallow waters around the Chinese coast produced by the uncoupled model. Cool and dry northerly winds from the Asian landmass reduce SST in these shallow waters through intensive upward heat loss. Thereafter, the horizontal gradient of sea level pressure (SLP) around the Chinese coast moderates because the land-ocean heat contrast weakens owing to the reduced SST in the coastal waters. As a result, the wind speed weakens, in line with the moderated horizontal SLP gradient. Moreover, northerly winds can reduce the transport of cool and dry air from the Asian landmass. Hence, upward heat flux around the coastal waters is reduced because of the weakening of the northerly winds and the decreased cool and dry air. This negative feedback thereby suppresses excessive SST cooling along the Chinese coast during winter.

AB - A regional atmosphere-ocean coupled model is developed, based on the Pennsylvania State University- National Center for Atmospheric Research Mesoscale Model in conjunction with the Princeton Ocean Model, to investigate atmosphere-ocean coupled processes that might occur over the Yellow and East China Sea shelves in winter. To examine how the coupled processes actually work in the ocean, sea surface temperatures (SSTs) computed in both coupled and uncoupled models are compared with SSTs synthesized from multiple satellite observations. The results indicate that the coupled model significantly improves the negative SST bias in shallow waters around the Chinese coast produced by the uncoupled model. Cool and dry northerly winds from the Asian landmass reduce SST in these shallow waters through intensive upward heat loss. Thereafter, the horizontal gradient of sea level pressure (SLP) around the Chinese coast moderates because the land-ocean heat contrast weakens owing to the reduced SST in the coastal waters. As a result, the wind speed weakens, in line with the moderated horizontal SLP gradient. Moreover, northerly winds can reduce the transport of cool and dry air from the Asian landmass. Hence, upward heat flux around the coastal waters is reduced because of the weakening of the northerly winds and the decreased cool and dry air. This negative feedback thereby suppresses excessive SST cooling along the Chinese coast during winter.

UR - http://www.scopus.com/inward/record.url?scp=84892458831&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84892458831&partnerID=8YFLogxK

U2 - 10.1175/JCLI-D-13-00117.1

DO - 10.1175/JCLI-D-13-00117.1

M3 - Article

AN - SCOPUS:84892458831

VL - 27

SP - 155

EP - 167

JO - Journal of Climate

JF - Journal of Climate

SN - 0894-8755

IS - 1

ER -