主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

Journal of Meteorology and Environment ›› 2024, Vol. 40 ›› Issue (4): 37-45.doi: 10.3969/j.issn.1673-503X.2024.04.005

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Assessment and analysis of climate trend predictions for precipitation in May of 2022 in Jiangxi province

Ya’nan LIU1(),Qiong WU2,*(),Yong LI2   

  1. 1. Jiangxi Institute of Meteorological Science, Nanchang 330046, China
    2. Jiangxi Climate Center, Nanchang 330046, China
  • Received:2023-02-20 Online:2024-08-28 Published:2024-10-11
  • Contact: Qiong WU E-mail:changelyn2022@163.com;wuqioong@foxmail.com

Abstract:

Based on datasets from ground observations and NCEP reanalysis, the climate prediction derived from the dynamic model was evaluated towards the precipitation in Jiangxi province in May of 2022, using the Tibetan Plateau snow cover anomaly index and atmospheric circulation index. Additionally, the predictive signals and their applications were also analyzed. The results showed that the model prediction of "above-normal precipitation in southern Jiangxi province" is generally accurate, and the prediction of "a concentration period of precipitation in Jiangxi province, with some areas experiencing floods" matches the reality. The precipitation processes in May are predicted well, though the drought severity in northern and central areas is underestimated to some extent. Prediction at the early stage combines the impacts of several predictive signals, including the La Niña event, the excessive snow cover anomaly over Tibetan Plateau in the preceding winter, and the sea surface temperature changes in Indian Ocean, on the precipitation trend in May of 2022 for Jiangxi province. However, it underestimates the influence of La Niña on the whole area and overestimates the impact of the excessive snow cover anomaly over Tibetan Plateau on the northern area, resulting in certain prediction deviations.

Key words: La Niña, Snow cover over Tibetan Plateau, Warm sea surface temperature in Indian Ocean

CLC Number: