Spatially diff erentiated changes in regional climate and underlying drivers in southwestern China  

作　　者：Meng Wang Chao Jiang Osbert Jianxin Sun 

机构地区：[1]School of Ecology and Nature Conservation,Beijing Forestry University,Beijing,100083,People’s Republic of China [2]Institute of Forestry and Climate Change Research,Beijing Forestry University,Beijing,100083,People’s Republic of China

出　　处：《Journal of Forestry Research》2022年第3期755-765,共11页林业研究（英文版）

基　　金：This research was funded by Ministry of Science and Technology of China(Grant No.2016YFC0502104).

摘　　要：The climate in Southwest China are predominantly under the influences of three contrasting climate systems, namely the East Asian monsoon, the South Asian monsoon, and the westerlies. However, it is unclear if the diversified climate systems, in combination with the complex terrain and varying vegetation types, would result in contrasting patterns of changes in climate across the region. Based on the CRU TS data for the period 1901−2017, we examined the spatiotemporal characteristics of the regional climate, and identified types of climate change patterns and drivers. Overall, the region experienced significant increases in annual mean temperature during 1901−2017, with occurrence of a significant turning point in 1954 for a more pronounced warming (0.16 ℃/10 a). The annual precipitation fluctuated greatly over the study period without apparent trend, albeit the occurrence of a significant turning point in 1928 for a slight increase in the later period (1.19 mm/10 a). Spatially the multi-year averages of selective climate variables during 1901–2017 displayed a trend of decreases from southeast to northwest, but with increasing variability. We identified five major climate change types across the study region, including warmer (T^(+)), drier (P^(−)), warmer-drier (T^(+)P^(−)), warmer-wetter (T^(+)P^(+)), and no significant changes (NSC). The type T^(+)P^(+) mainly occurred in the western parts over the plateau sub-frigid semiarid ecozone (77.0%) and the plateau sub-frigid semihumid ecozone (19.9%). The central parts of the region are characterized by the type T^(+), corresponding to six ecozones, including the mid-subtropical humid ecozone (33.1%), the plateau temperate humid-semihumid ecozone (28.8%), the plateau sub-rigid semihumid ecozone (9.5%), the southern subtropical humid ecozone (8.1%), the plateau sub-frigid arid ecozone (7.3%), and the plateau temperate semiarid ecozone (6.6%). No significant change in climate was detected for the eastern parts over the mid-subtropical humid ecozone (67.3%

关 键 词：Climate change Ecozone Regional climate TOPOGRAPHY VEGETATION 

分 类 号：P467[天文地球—大气科学及气象学]