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

气象与环境学报 ›› 2021, Vol. 37 ›› Issue (3): 57-64.doi: 10.3969/j.issn.1673-503X.2021.03.008

• 论文 • 上一篇    下一篇

全球变暖趋缓背景下辽宁夏季降水变化及水汽输送特征

常姝婷(),白雪,曲梓祎,温舟,徐玉秀,高铭,张翠艳*()   

  1. 锦州市气象局, 辽宁 锦州 121000
  • 收稿日期:2019-12-29 出版日期:2021-06-30 发布日期:1900-01-01
  • 通讯作者: 张翠艳 E-mail:13897861158@163.com;zhangcuiyan2008@163.com
  • 作者简介:常姝婷, 女, 1995年生, 工程师, 主要从事短期气候变化方面的研究, E-mail: 13897861158@163.com
  • 基金资助:
    国家重点研发计划项目(2018YFC1507305);中国气象局预报员专项(CMAYBY2019-024);辽宁省气象局重点科研项目(201802)

Analysis of precipitation variation and water vapor flux characteristics in summer under the background of global warming in Liaoning province

Shu-ting CHANG(),Xue BAI,Zi-yi QU,Zhou WEN,Yu-xiu XU,Ming GAO,Cui-yan ZHANG*()   

  1. Jinzhou Meteorological Service, Jinzhou 121000, China
  • Received:2019-12-29 Online:2021-06-30 Published:1900-01-01
  • Contact: Cui-yan ZHANG E-mail:13897861158@163.com;zhangcuiyan2008@163.com

摘要:

利用中国气象数据网提供的中国地面气候资料日值数据集(V3.0)中的降水数据以及ERA-Interim逐月再分析资料对全球变暖趋缓背景下(1998年后)辽宁夏季降水变化特征及水汽输送对其的影响进行研究。结果表明:全球增暖减缓背景下,辽宁夏季降水量存在一定的增加趋势,但趋势较弱,其中辽宁南部降水的增加趋势较其他地区显著,对辽宁整体降水变化的贡献程度相对较高。辽宁南北边界的夏季水汽通量与降水量呈现高度的正相关性。其中,南边界的相关性程度最显著。辽宁上空纬向水汽净输入量对降水的贡献较小,经向水汽通量对于降水的贡献较纬向高且其高值区主要位于辽宁东部及南部地区的对流层低层,对当地降水存在影响。辽宁南部对流层整层的经向水汽通量与辽宁降水量存在显著正相关,通过分析大气环流背景场的变化对辽宁经向水汽输送的影响分析,西太平洋副热带高压脊线的逐渐北移是造成辽宁经向水汽通量增加的重要因素,从而直接影响辽宁降水量的变化趋势,导致辽宁夏季降水在全球变暖减缓背景下存在一定的增加趋势。

关键词: 年际变化, 纬向水汽输送, 经向水汽输送

Abstract:

Based on the precipitation data from the daily surface climate data set (V3.0) provided by China Meteorological Data Network and the monthly reanalysis data from ERA (European centre for medium-range weather forecasts Re-Analysis) Interim, the characteristics of summer precipitation and the influence of water vapor transport over Liaoning province under the background of global warming since 1999 were studied.The results show that under the background of slowing down of global warming, the summer precipitation in Liaoning province has a certain increasing trend, but the trend is weak.The increasing trend of precipitation in the southern part of Liaoning province is more significant than that in other regions, which contributes a high degree to the overall precipitation change in Liaoning province.There is a high positive correlation between water vapor flux and precipitation over the northern and southern border of Liaoning province in summer.The southern boundary has the most significant correlation.The contribution of meridional water vapor flux to precipitation is higher than that of zonal water vapor flux, and the high-value area is mainly located in the lower troposphere of eastern and southern Liaoning province, which has an impact on local precipitation.The meridional water vapor flux in the troposphere of southern Liaoning province has a significantly positive correlation with precipitation in Liaoning province.Based on the analysis of the influence of atmospheric circulation background field on the water vapor flux the northward movement of western Pacific subtropical high ridge is an important factor causing the increase of water vapor flux in Liaoning province which directly affects precipitation variation and results in an increasing trend of precipitation in summer in Liaoning province under the background of global warming.

Key words: Interannual variability, Zonal water vapor flux, Meridional water vapor flux

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