大气科学学报2018，Vol.41Issue(1)：1-11,11.DOI:10.13878/j.cnki.dqkxxb.20170806001
青藏高原土壤湿度的变化特征及其对中国东部降水影响的研究进展
The variation characteristics of soil moisture in Tibet Plateau and its influences on the precipitation in eastern China:Recent progress
摘要
Abstract
The soil moisture over the Tibetan Plateau (TP),collectively affected by the snow cover and permafrost,has a long memory of wet and dry of land surface processes.Therefore,the soil moisture over TP,as an important factor of climate change,could be used to forecast the precipitation pattern in East China.However,because of rare observation stations over TP,the soil moisture observation in long time series is very deficient over TP.It leads to most of recent studies were based on reanalysis data,modeling data and satellite remote sensing data(named substitute data).Moreover,their findings were uncertain and different from the others.Therefore,in this study,studies about the applicability of various kinds of substitute data are summarized firstly,then characteristic of the soil moisture over TP as well as its climate effect are discussed.1) Comparison shows that current substitute data of soil moisture has significant over-or under-valuation over TP.Different conclusion could be drew according to various evaluation indicators and interpolation methods.Comparatively speaking,soil moisture products of SSM/I and FY 3B are in good correlation with observations.2) Soil moisture over TP has significant variations in multitime timescale and remarkable spatial inhomogeneity in decadal trend pattern and interannual characteristic.There is significant ascending trend in spring soil moisture over TP based on SSM/I,in agreement with remarkable warming over TP.Two large interannual variation centers exit in east and west TP,whose related latent heat flux and sensible heating flux could motivate teleconnection wave train to affect precipitation anomaly in Yangtze River.3) Previous studies is different with each other about the effect of soil moisture over TP on precipitation over East China.One of the possible reason is that their substitute data is various with different applicability.Another reason may be the spatial inhomogeneity ignored in modeling design.Related issues need further research.关键词
青藏高原/土壤湿度/资料评估/时空变化特征/中国东部降水Key words
Tibetan Plateau/soil moisture/data assessment/temporal and spatial characteristics/precipitation in Eastern China引用本文复制引用
王静,何金海,祁莉,吴志伟,施晓晖..青藏高原土壤湿度的变化特征及其对中国东部降水影响的研究进展[J].大气科学学报,2018,41(1):1-11,11.基金项目
国家自然科学基金资助项目(91437216 （）
91337108 （）
91337216) （）
国家重点基础研究发展计划973项目(2013CB430202) （2013CB430202）
江苏高校优势学科建设工程资助项目(PAPD) （PAPD）
长江学者和创新团队发展计划(PCSIRT) （PCSIRT）
江苏省青蓝工程创新团队项目 （）
