Impact of ENSO regimes on developing- and decaying-phase precipitation during rainy season in China
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 <i>t</i&...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2017-11-01
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| Series: | Hydrology and Earth System Sciences |
| Online Access: | https://www.hydrol-earth-syst-sci.net/21/5415/2017/hess-21-5415-2017.pdf |
| Summary: | 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
<i>t</i> 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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| ISSN: | 1027-5606 1607-7938 |