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Summer High Temperature Extremes in Southeast China: Bonding with the El Nino-Southern Oscillation and East Asian Summer Monsoon Coupled System

Wang, W. W.; Zhou, W. and Chen, Deliang (2014) In Journal of Climate 27(11). p.4122-4138
Abstract
This study investigates summer high temperature extremes (HTEs) in southeast China and their linkage with the El Nino-Southem Oscillation (ENSO) and atmospheric circulations in the East Asian summer monsoon (EASM). An interdecadal change in HTEs associated with the abrupt shift of the ENSO monsoon climate in the late 1980s is demonstrated. Before this interdecadal shift, the interannual variability of HTEs was linked mainly to temperature adjustments associated with the meridional displacement of the East Asian jet stream (EAJS), whereas after the shift HTEs were found to follow an ENSO cycle, which may be due to intensified and persistent ENSO activities, tropical Indian Ocean (TIO) warming, and changes in atmospheric teleconnections.... (More)
This study investigates summer high temperature extremes (HTEs) in southeast China and their linkage with the El Nino-Southem Oscillation (ENSO) and atmospheric circulations in the East Asian summer monsoon (EASM). An interdecadal change in HTEs associated with the abrupt shift of the ENSO monsoon climate in the late 1980s is demonstrated. Before this interdecadal shift, the interannual variability of HTEs was linked mainly to temperature adjustments associated with the meridional displacement of the East Asian jet stream (EAJS), whereas after the shift HTEs were found to follow an ENSO cycle, which may be due to intensified and persistent ENSO activities, tropical Indian Ocean (TIO) warming, and changes in atmospheric teleconnections. Impacts of the EAJS, the South Asian high (SAH), and the western North Pacific subtropical high (WNPSH) on HTEs are further investigated based on empirical orthogonal function (EOF) analysis. It is found that mainly the first leading EOF mode with a homogeneous spatial pattern shows dominance before the interdecadal shift, whereas both of the first two leading EOF modes show dominance after the interdecadal shift. A possible mechanism of how HTEs in southeast China are linked to the EAJS, the SAH, and the WNPSH in the ENSO-monsoon coupled system is proposed. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Climate
volume
27
issue
11
pages
4122 - 4138
publisher
American Meteorological Society
external identifiers
  • scopus:84901826498
ISSN
1520-0442
DOI
10.1175/jcli-d-13-00545.1
project
MERGE
language
English
LU publication?
no
id
17132c81-a2a1-41be-ae53-9a7b205bf34c (old id 7515670)
date added to LUP
2015-07-08 14:40:26
date last changed
2017-11-05 04:44:39
@article{17132c81-a2a1-41be-ae53-9a7b205bf34c,
  abstract     = {This study investigates summer high temperature extremes (HTEs) in southeast China and their linkage with the El Nino-Southem Oscillation (ENSO) and atmospheric circulations in the East Asian summer monsoon (EASM). An interdecadal change in HTEs associated with the abrupt shift of the ENSO monsoon climate in the late 1980s is demonstrated. Before this interdecadal shift, the interannual variability of HTEs was linked mainly to temperature adjustments associated with the meridional displacement of the East Asian jet stream (EAJS), whereas after the shift HTEs were found to follow an ENSO cycle, which may be due to intensified and persistent ENSO activities, tropical Indian Ocean (TIO) warming, and changes in atmospheric teleconnections. Impacts of the EAJS, the South Asian high (SAH), and the western North Pacific subtropical high (WNPSH) on HTEs are further investigated based on empirical orthogonal function (EOF) analysis. It is found that mainly the first leading EOF mode with a homogeneous spatial pattern shows dominance before the interdecadal shift, whereas both of the first two leading EOF modes show dominance after the interdecadal shift. A possible mechanism of how HTEs in southeast China are linked to the EAJS, the SAH, and the WNPSH in the ENSO-monsoon coupled system is proposed.},
  author       = {Wang, W. W. and Zhou, W. and Chen, Deliang},
  issn         = {1520-0442},
  language     = {eng},
  number       = {11},
  pages        = {4122--4138},
  publisher    = {American Meteorological Society},
  series       = {Journal of Climate},
  title        = {Summer High Temperature Extremes in Southeast China: Bonding with the El Nino-Southern Oscillation and East Asian Summer Monsoon Coupled System},
  url          = {http://dx.doi.org/10.1175/jcli-d-13-00545.1},
  volume       = {27},
  year         = {2014},
}