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Impact of ENSO regimes on developing- and decaying-phase precipitation during rainy season in China

Cao, Qing; Hao, Zhenchun; Yuan, Feifei LU ; Su, Zhenkuan; Berndtsson, Ronny LU ; Hao, Jie and Nyima, Tsring (2017) In Hydrology and Earth System Sciences 21(11). p.5415-5426
Abstract

This study investigated the influence of five El Niño-Southern Oscillation (ENSO) types on rainy-season precipitation in China: central Pacific warming (CPW), eastern Pacific cooling (EPC), eastern Pacific warming (EPW), conventional ENSO and ENSO Modoki. The multi-scale moving t test was applied to determine the onset and withdrawal of rainy season. Results showed that the precipitation anomaly can reach up to 30 % above average precipitation during decaying CPW and EPW phases. Developing EPW could cause decreasing precipitation over large areas in China with 10-30 % lower than average precipitation in most areas. Conventional El Niño in the developing phase had the largest influence on ENSO-related precipitation among developing ENSO... (More)

This study investigated the influence of five El Niño-Southern Oscillation (ENSO) types on rainy-season precipitation in China: central Pacific warming (CPW), eastern Pacific cooling (EPC), eastern Pacific warming (EPW), conventional ENSO and ENSO Modoki. The multi-scale moving t test was applied to determine the onset and withdrawal of rainy season. Results showed that the precipitation anomaly can reach up to 30 % above average precipitation during decaying CPW and EPW phases. Developing EPW could cause decreasing precipitation over large areas in China with 10-30 % lower than average precipitation in most areas. Conventional El Niño in the developing phase had the largest influence on ENSO-related precipitation among developing ENSO and ENSO Modoki regimes. Decaying ENSO also showed a larger effect on precipitation anomalies, compared to decaying ENSO Modoki. The difference between rainy-season precipitation under various ENSO regimes may be attributed to the combined influence of anti-cyclone in the western North Pacific and the Indian monsoon. Stronger monsoon and anti-cyclone are associated with enhanced rainy-season precipitation. The results suggest a certain predictability of rainy-season precipitation related to ENSO regimes.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Hydrology and Earth System Sciences
volume
21
issue
11
pages
12 pages
publisher
European Geophysical Society
external identifiers
  • scopus:85032968779
ISSN
1027-5606
DOI
10.5194/hess-21-5415-2017
language
English
LU publication?
yes
id
cc34520d-6d3c-48be-b942-0a948fbb55d4
date added to LUP
2017-11-16 07:57:00
date last changed
2018-01-07 12:25:56
@article{cc34520d-6d3c-48be-b942-0a948fbb55d4,
  abstract     = {<p>This study investigated the influence of five El Niño-Southern Oscillation (ENSO) types on rainy-season precipitation in China: central Pacific warming (CPW), eastern Pacific cooling (EPC), eastern Pacific warming (EPW), conventional ENSO and ENSO Modoki. The multi-scale moving t test was applied to determine the onset and withdrawal of rainy season. Results showed that the precipitation anomaly can reach up to 30 % above average precipitation during decaying CPW and EPW phases. Developing EPW could cause decreasing precipitation over large areas in China with 10-30 % lower than average precipitation in most areas. Conventional El Niño in the developing phase had the largest influence on ENSO-related precipitation among developing ENSO and ENSO Modoki regimes. Decaying ENSO also showed a larger effect on precipitation anomalies, compared to decaying ENSO Modoki. The difference between rainy-season precipitation under various ENSO regimes may be attributed to the combined influence of anti-cyclone in the western North Pacific and the Indian monsoon. Stronger monsoon and anti-cyclone are associated with enhanced rainy-season precipitation. The results suggest a certain predictability of rainy-season precipitation related to ENSO regimes.</p>},
  author       = {Cao, Qing and Hao, Zhenchun and Yuan, Feifei and Su, Zhenkuan and Berndtsson, Ronny and Hao, Jie and Nyima, Tsring},
  issn         = {1027-5606},
  language     = {eng},
  month        = {11},
  number       = {11},
  pages        = {5415--5426},
  publisher    = {European Geophysical Society},
  series       = {Hydrology and Earth System Sciences},
  title        = {Impact of ENSO regimes on developing- and decaying-phase precipitation during rainy season in China},
  url          = {http://dx.doi.org/10.5194/hess-21-5415-2017},
  volume       = {21},
  year         = {2017},
}