南京大学学报（自然科学版）Issue(6)：737-747,11.DOI:10.13232/j.cnki.jnju.2014.06.002
中国东部城市下垫面变化对南海夏季风爆发影响的数值模拟
A numerical study of the impact of urban land-use change over eastern China on South China Sea monsoon onset
摘要
Abstract
A large-scale coastal city zone over eastern China represented by the three large urban agglomerations of the Yangtze River Delta,the Pearl River Delta,and the Beijing-Tianjin-Hebei region is most active and developed areas in China and has experienced quick urbanization.The influence of urban land-use change over eastern China on South China Sea summer monsoon onset is investigated using Community Atmosphere Model Version 5 .1 (CAM5.1).Two experiments were designed:(1)urban land cover determined by actual underlying surface land use data from 2000 and(2)no urban areas over eastern China(20°-50°N,100°-125°E).Simulated the seasonal transition of large-scale atmospheric circulation and precipitation distribution agree well with the corresponding measurements.Comparison of the two runs shows that urbanization over eastern China may advance the date of South China Sea monsoon onset by one pentad,and the transition of zonal wind as well as dramatical enhancement of precipitation over South China Sea in mid-May are correspondingly advanced.Note that the age of rapid development of urbanization over eastern China is consistent with interdecadal advance of South China Sea monsoon onset after 1993.It is inferred that urbanization may be one of the reasons for the interdecadal variation of monsoon onset. Possible mechanisms were analyzed and it was found that the decreased land surface albedo caused by urbanization will induce strengthened sensible heating from land to air in the middle to high latitudes over eastern China continent between 110°E and 120°E,and the thermal contrast between ocean and land is reduced,which caused advancing the formation of land low pressure,and leading the earlier onset of South China Sea summer monsoon.关键词
城市下垫面变化/南海季风爆发/中高纬陆地/数值模拟Key words
urban land-use change/south China sea monsoon onset/middle to high latitudes/numerical simulation引用本文复制引用
马红云,薛佳庆,江志红,徐海明..中国东部城市下垫面变化对南海夏季风爆发影响的数值模拟[J].南京大学学报（自然科学版）,2014,(6):737-747,11.基金项目
国家重点基础研究发展计划(973计划)(2010CB428505),江苏高校优势学科建设工程(PAPD),江苏省高校“青蓝工程” （973计划）
