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Interannual teleconnections between the summer North Atlantic Oscillation and the East Asian summer monsoon

Linderholm, Hans; Ou, TH; Jeong, Jee-Hoon; Folland, C. K.; Gong, D.; Liu, H.; Liu, Y. and Chen, Deliang (2011) In Journal of Geophysical Research: Atmospheres 116. p.13107-13107
Abstract
Here we present a study of the relationship between July-August (JA) mean climate over China, which is strongly linked to the East Asian summer monsoon (EASM), and the summer (JA) North Atlantic Oscillation (SNAO). The variations of temperature, precipitation, and cloud cover related to the SNAO were analyzed for the period 1951-2002 using gridded data sets as well as instrumental data from 160 stations in China. It was shown that the major patterns of summer climate over China are highly connected with the interannual variation of the SNAO, supporting a teleconnection between the North Atlantic region and East Asia. Based on the analyses of the daily and monthly reanalysis data sets, we propose possible mechanisms of this teleconnection.... (More)
Here we present a study of the relationship between July-August (JA) mean climate over China, which is strongly linked to the East Asian summer monsoon (EASM), and the summer (JA) North Atlantic Oscillation (SNAO). The variations of temperature, precipitation, and cloud cover related to the SNAO were analyzed for the period 1951-2002 using gridded data sets as well as instrumental data from 160 stations in China. It was shown that the major patterns of summer climate over China are highly connected with the interannual variation of the SNAO, supporting a teleconnection between the North Atlantic region and East Asia. Based on the analyses of the daily and monthly reanalysis data sets, we propose possible mechanisms of this teleconnection. Changes in the position of the North Atlantic storm tracks and transient eddy activity associated with the positive (negative) SNAO phase contribute downstream to negative (positive) sea level pressure anomalies in northeastern East Asia. In negative SNAO years, a stationary wave pattern is excited from the southern SNAO center over northwestern Europe to northeastern East Asia. However, during positive SNAO years, a stationary wave pattern is excited extending from the SNAO center across the central Eurasian continent at around 40 degrees N and downstream to the southeast. This may explain a connection between the positive SNAO and atmospheric circulation in middle and southeastern China. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Geophysical Research: Atmospheres
volume
116
pages
13107 - 13107
publisher
Wiley-Blackwell
external identifiers
  • scopus:79960533770
ISSN
2169-8996
DOI
10.1029/2010JD015235
project
BECC
language
English
LU publication?
no
id
92664cf1-b7eb-40d0-a64b-fdc09bbf8011 (old id 4448606)
date added to LUP
2014-05-23 12:11:20
date last changed
2017-09-17 04:18:47
@article{92664cf1-b7eb-40d0-a64b-fdc09bbf8011,
  abstract     = {Here we present a study of the relationship between July-August (JA) mean climate over China, which is strongly linked to the East Asian summer monsoon (EASM), and the summer (JA) North Atlantic Oscillation (SNAO). The variations of temperature, precipitation, and cloud cover related to the SNAO were analyzed for the period 1951-2002 using gridded data sets as well as instrumental data from 160 stations in China. It was shown that the major patterns of summer climate over China are highly connected with the interannual variation of the SNAO, supporting a teleconnection between the North Atlantic region and East Asia. Based on the analyses of the daily and monthly reanalysis data sets, we propose possible mechanisms of this teleconnection. Changes in the position of the North Atlantic storm tracks and transient eddy activity associated with the positive (negative) SNAO phase contribute downstream to negative (positive) sea level pressure anomalies in northeastern East Asia. In negative SNAO years, a stationary wave pattern is excited from the southern SNAO center over northwestern Europe to northeastern East Asia. However, during positive SNAO years, a stationary wave pattern is excited extending from the SNAO center across the central Eurasian continent at around 40 degrees N and downstream to the southeast. This may explain a connection between the positive SNAO and atmospheric circulation in middle and southeastern China.},
  author       = {Linderholm, Hans and Ou, TH and Jeong, Jee-Hoon and Folland, C. K. and Gong, D. and Liu, H. and Liu, Y. and Chen, Deliang},
  issn         = {2169-8996},
  language     = {eng},
  pages        = {13107--13107},
  publisher    = {Wiley-Blackwell},
  series       = {Journal of Geophysical Research: Atmospheres},
  title        = {Interannual teleconnections between the summer North Atlantic Oscillation and the East Asian summer monsoon},
  url          = {http://dx.doi.org/10.1029/2010JD015235},
  volume       = {116},
  year         = {2011},
}