摘要
为了解全球陆面土壤干湿变化的规律,基于1979—2018年NCEP-R2再分析多要素资料,对全球陆面干湿程度进行了全面分析.结果显示:土壤湿度、潜在蒸发、感热通量、潜热通量以及降水量的变化趋势均表明全球大陆整体呈现“干变干,湿变湿”的趋势,其中北非、西亚和中亚3个区域的“干变干”与北美中部和南美洲西部的“湿变湿”更加显著;中国西北地区东部、澳大利亚西部和南美洲部分地区出现显著“干变湿”趋势;巴尔喀什湖南部、澳大利亚东部以及北美洲西端等地区出现显著“湿变干”趋势.“干变湿”和“湿变干”的逆转可能会对大陆生态变化造成较大的影响,其形成原因值得深入研究.
Based on the multi factor data of NCEP R-2 reanalysis from 1979 to 2018,this paper makes a comprehensive analysis of the global land surface dry and wet degree.The results show that the variation trends of soil moisture,potential evaporation,sensible heat flux,latent heat flux and precipitation show that the global continent as a whole shows a trend of“dry gets drier and wet gets wetter”,and the“dry gets drier”in northern Africa,Western Asia and Central Asia and the“wet gets wetter”in central North America and western South America are more significant,This is consistent with the views of the IPCC fifth Assessment Report.In addition,there is a significant“dry gets wetter”trend in the east of Northwest China,Western Australia and some parts of South America;There is a significant“wet gets drier”trend in the southern Balkash,eastern Australia and the western end of North America.The reversal of“dry gets wetter”and“wet gets drier”may have a great impact on the ecological changes of the mainland,and its formation reason is worth studying deeply.
作者
程洁
田小卉
黄禹
钟叶
李中外
封国林
吴永萍
CHENG Jie;TIAN Xiaohui;HUANG Yu;ZHONG Ye;LI Zhongwai;FENG Guolin;WU Yongping(School of Physical Science and Technology,Yangzhou University,Yangzhou 225002,China;Open Laboratory of Climate Research,China Meteorological Administration,National Climate Center,Beijing 100081,China)
出处
《扬州大学学报（自然科学版）》
CAS
北大核心
2022年第2期51-57,共7页
Journal of Yangzhou University：Natural Science Edition
基金
国家重点研发计划资助项目(2018YFE0109600,2017YFC1502303)
国家自然科学基金资助项目(41875097,41875096,41705053)。
关键词
土壤湿度
蒸发
降水
干湿变化
soil moisture
evaporation
precipitation
wet and dry change
