Arid Zone Research ›› 2021, Vol. 38 ›› Issue (1): 22-28.doi: 10.13866/j.azr.2021.01.03

• Pan-Third Pole Environment and Green Silk Road • Previous Articles     Next Articles

Analysis of precipitation change and its contribution in the rainy season in the northeast Qinghai-Tibet Plateau from 1961 to 2017

YANG Zhaoming1(),ZHANG Tiaofeng1,2()   

  1. 1. Qinghai climate center, Xining 810001, Qinghai, China
    2. College of Atmospheric Science, Lanzhou University, Lanzhou 730000, Gansu, China
  • Received:2020-04-23 Revised:2020-09-14 Online:2021-01-15 Published:2021-03-05
  • Contact: Tiaofeng ZHANG E-mail:88111686@qq.com;ztf_qhzx@163.com

Abstract:

The study on the characteristics of precipitation in the Qinghai-Tibet Plateau under the background of climate warming is of great significance for revealing the impact of climate change on agriculture, animal husbandry, and ecological environment. Based on the daily precipitation data of 53 meteorological observation stations from May to September of 1961-2017, the characteristics of rainy season precipitation in the northeast Qinghai-Tibet Plateau and the relative contribution of changes in precipitation of different grades in precipitation increment were analyzed. The results showed that the rainy season precipitation in the arid region in the northeast of the Qinghai-Tibet Plateau increased and that in the semi-arid and semi-humid regions became extreme from 1961 to 2017. Precipitation intensity has generally increased in most areas. Further analysis showed that the change in rainy season precipitation in the northeast of the Qinghai-Tibet Plateau is caused by the change in precipitation intensity, and the increase in contribution of moderate rainfall grade precipitation is greater than that of other grade precipitation. The trend of precipitation extremization in the east of the semi-humid and semi-arid regions was obviously enhanced. The results are helpful in understanding the climatic effect of change in ecological environment on the northeast of Qinghai-Tibet Plateau.

Key words: Northeast Qinghai-Tibet Plateau, classified precipitation, precipitation, contribution