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中国夏季风影响过渡区与其他地区蒸发皿蒸发量趋势相反的原因
作者:
作者单位:

1.兰州大学大气科学学院, 兰州730000;2.中国气象局兰州干旱气象研究所/甘肃省干旱气候变化与减灾重点实验室/中国气象局干旱气候变化与减灾重点开放实验室, 兰州730020;3.甘肃省气象局, 兰州730020;4.甘肃省气象信息与技术装备保障中心, 兰州 730020

作者简介:

杨司琪,女,1993年出生,硕士研究生,主要从事陆—气相互作用等方面的研究。E-mail: yangsq1993@163.com

通讯作者:

张强,E-mail: zhangqiang@cma.gov.cn

基金项目:

国家自然科学基金项目41630426


The Reason of Trends in Pan Evaporation in the Summer Monsoon Transition Region Contrary to Those of Other Regions in China
Author:
Affiliation:

1.College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000;2.Institute of Arid Meteorology, China Meteorological Administration/Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province/Key Open Laboratory of Arid Climatic Change and Disaster Reduction, China Meteorological Administration, Lanzhou 730020;3.Gansu Provincial Meteorological Bureau, Lanzhou 730020;4.Gansu Provincial Meteorological Information and Technic Support and Equipment Center, Lanzhou 730020

Fund Project:

National Natural Science Foundation of China Grant 41630426National Natural Science Foundation of China (Grant 41630426)

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    摘要:

    夏季风影响过渡区是天气和气候的敏感区,随着全球和区域的变暖,该区域特殊的气候环境响应引起人们重点关注。以南昌、定西、乌鲁木齐作为夏季风影响区、夏季风影响过渡区以及非夏季风影响区的代表站,通过对比中国夏季风影响过渡区和其他地区50年来温度、日照时数、相对湿度、降水量、低云量、风速的变化趋势,以及分析各气象因子单独变化对蒸发皿蒸发量的影响,发现在夏季风影响过渡区各个气象因子的变化均使蒸发皿蒸发量增加,而在其他地区,只有温度变化会使蒸发皿蒸发量增加,其他各因子的变化均会造成蒸发皿蒸发量的下降。贡献度更直观的反映各气象因子对不同地区蒸发皿蒸发的作用。结果表明温度变化对夏季风影响过渡区蒸发皿蒸发变率的贡献最大,贡献度为48.93%。风速变化对夏季风影响区蒸发皿蒸发变率的贡献最大,贡献度为51.54%。降水变化对非夏季风影响区蒸发皿蒸发变率的贡献最大,贡献度为58.57%。此外,低云量的变化对夏季风影响过渡区、夏季风影响区和非夏季风影响区的贡献均达到20%以上。因此,不同地区影响蒸发皿蒸发的最主要的因子是不同的,但低云量对任何地区蒸发皿蒸发的影响都非常重要。

    Abstract:

    The summer monsoon transition region is a sensitive region of weather and climate. With global warming, its special climatic environmental response has drawn more attention. Nanchang station, Dingxi station, and Ürümqi station are representative of the summer monsoon region, the summer monsoon transition region, and the non-monsoon region, respectively. Temperature, sunshine duration, relative humidity, precipitation, low cloud cover, and wind speed were compared between the summer monsoon transition region and other regions of China over the past 50 years. Trends in pan evaporation for each changing meteorological factor were analyzed. The authors found that, in the summer monsoon transition region, any single meteorological factor change would lead to increasing trends in pan evaporation. However, in the other regions, only air temperature change led to increasing pan evaporation; changes in other factors caused a decrease in pan evaporation. The contribution rate intuitively reflected the effect of each meteorological factor. Results showed that temperature had the greatest contribution to pan evaporation in the summer monsoon transition region with a contribution rate of 48.93%. Wind speed had the greatest contribution to pan evaporation in the summer monsoon region, with a contribution rate of 51.54%. Precipitation contributed the most to pan evaporation in the non-monsoon region, with a contribution rate of 58.57%. In addition, the contribution of low cloud cover reached more than 20% regardless of the region. Therefore, the main factors affecting pan evaporation were different for each different region, while the effect of low cloud cover was significant for all regions.

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杨司琪,张强,奚小霞,乔梁.中国夏季风影响过渡区与其他地区蒸发皿蒸发量趋势相反的原因.大气科学,2019,43(6):1441~1450 YANG Siqi,ZHANG Qiang,XI Xiaoxia,QIAO Liang.The Reason of Trends in Pan Evaporation in the Summer Monsoon Transition Region Contrary to Those of Other Regions in China.Chinese Journal of Atmospheric Sciences (in Chinese),2019,43(6):1441~1450

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  • 收稿日期:2018-11-13
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  • 在线发布日期: 2019-11-14
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