Analysis of Dry-Wet Climate Change Characteristics and Main Influencing Factors in Main Grain Producing Area of Tibet from 1980 to 2021  

作　　者：Sangbu ZHUJIE Cunjie ZHANG Puchi ZHAXI Deji BAIMA Lamu NIMA Ciwang PINGCUO 

机构地区：[1]Nanmulin Meteorological Bureau of Tibet Autonomous Region,Shigatse 857000,China [2]National Climate Center,Beijing 100089,China [3]Shigatse Agricultural Science Research and Promotion Center,Shigatse 857000,China [4]Dingri County Meteorological Bureau of Tibet Autonomous Region,Shigatse 857000,China

出　　处：《Agricultural Biotechnology》2024年第2期43-49,63,共8页农业生物技术（英文版）

基　　金：Supported by Natural Science Foundation of Tibet Autonomous Region(XZ202001ZR0082G);National Key Research and Development Program of China(2020YFA0608203);Key Research and Development of Science and Technology Program of Tibet Autonomous Region(CGZH2024000002)。

摘　　要：Based on the daily meteorological observation data of seven meteorological stations in southern Tibet from 1980 to 2021 (April-October), the temporal and spatial variation characteristics and influencing factors of aridity index ( AI ) in the growing season of major grain producing areas in Tibet were studied by using climate tendency rate, Mann-Kendal test, Morlet wavelet analysis, GIS hybrid interpolation method, Pearson correlation coefficient, contribution rate analysis and other methods. The results showed that the average AI in the main grain producing areas of Tibet was 1.7, which belonged to the semi-arid area, and the overall trend was decreasing (humidifying) (-0.036/10 a). The linear decreasing trend was different in different regions, and the area around Lhatse County was the most significant (-0.26/10 a). AI had no obvious abrupt change, and had long- and medium-term fluctuation characteristics of 24 years, 6 years. The spatial distribution was uneven, and had the characteristics of ‘shrinking arid area and expanding humid area . The contribution rates of the main climate influencing factors of AI varied in different regions. In general, the contribution rates after quantification was as follows: precipitation (34.9%)>relative humidity (28.4%)>sunshine (19.9%)>maximum temperature (12.4%).

关 键 词：TIBET Main production area CLIMATE ARIDITY Contribution rate 

分 类 号：F326.13[经济管理—产业经济]