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

Research output: Contribution to journalArticle

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 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.

Details

Authors
Organisations
External organisations
  • Hohai University
  • Nanjing Hydraulic Research Institute
  • Investigation Bureau of Hydrology and Water Resources
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Oceanography, Hydrology, Water Resources
Original languageEnglish
Pages (from-to)5415-5426
Number of pages12
JournalHydrology and Earth System Sciences
Volume21
Issue number11
Publication statusPublished - 2017 Nov 6
Publication categoryResearch
Peer-reviewedYes