South drying and north wetting over the Tibetan Plateau modulated by a zonal temperature dipole across timescales  

作　　者：Ru-Cong YU Jian LI Ming-Ming ZHANG Ni-Na LI Yin ZHAO 

机构地区：[1]State Key Laboratory of Severe Weather and Institute of Tibetan Plateau Meteorology,Chinese Academy of Meteorological Sciences,Beijing 100081,China [2]Department of Meteorology,University of Reading,Reading RG66AH,UK [3]National Meteorological Center,China Meteorological Administration,Beijing 100081,China

出　　处：《Advances in Climate Change Research》2023年第2期276-285,共10页气候变化研究进展（英文版）

基　　金：the National Natural Science Foundation of China(42225505,U2142204,91637210);S&T Development Fund of CAMS(2022KJ007,2023KJ033);the Jiangsu Collaborative Innovation Center for Climate Change.

摘　　要：Precipitation over the Tibetan Plateau and surrounding highlands is a crucial process in the hydrological cycle and is very important for local and downstream ecology,and previous research mainly focused on a certain range of timescales.A better understanding of the variability across various timescales,which has been largely ignored,can provide new insight on the regional weather and climate.Here,a north‒south dipole pattern of precipitation shaped by a zonal dipole of the upper-tropospheric temperature is revealed in this region.Both dipole patterns of the precipitation and the accompanied temperature exist from daily to interdecadal scales.The three-dimensional circulation anomalies connecting the temperature and precipitation dipoles are consistent across various timescales.The frequencies of daily events with opposite phases of the temperature dipole modulate the interannual and interdecadal variability in precipitation.The south drying and north wetting pattern over the Tibetan Plateau is an interdecadal manifestation of the precipitation dipole and can be ascribed to the temperature trend favourable for the positive phase of the zonal temperature dipole.The consistent dipole pattern constructs a more complete portrayal of precipitation over the Tibetan Plateau from synoptic scale to climatology.

关 键 词：Tibetan plateau Dipole of precipitation Daily scale Interannual scale Interdecadal scale 

分 类 号：X16[环境科学与工程—环境科学]