大气科学2016，Vol.40Issue(4)：805-816,12.DOI:10.3878/j.issn.1006-9895.1511.15178
1990年代初夏季东北亚低压的年代际转变
Inter-decadal Change in the Summertime Northeast Asia Low-Pressure System in the Early 1990s
摘要
Abstract
AbstractEast Asian summer climate is controlled by a low pressure system centered over continental northern East Asia in the lower troposphere, which is named as the Northeast Asia low pressure (NEAL). Based on the NCEP-DOE, NCEP-NCAR, ERA-40, and ERA-Interim reanalysis data, we investigate the inter-decadal change of the summertime Northeast Asia Low-pressure system and discuss the possible physical mechanism associated with this change. Results show that NEAL experienced a significant decadal change in the early 1990s. The intensity of NEAL has decreased since 1991. Corresponding to the weakened NEAL, the tropospheric geopotential height field over Northeast Asia presents a barotropic-structure positive anomaly and the intensity of upper-tropospheric westerly jet to the south decreases. Based on results from the observational analysis and simulations of a linear baroclinic model, it is found that the surface warming around the Lake Baikal in the summer may be responsible for the weakening of the NEAL after the early 1990s.关键词
夏季东北亚低压/年代际变化/环贝加尔湖增暖Key words
Summertime Northeast Asia low pressure/Inter-decadal variability/Local warming around the Lake Baikal分类
大气科学引用本文复制引用
杜梦醒,林中达,陆日宇..1990年代初夏季东北亚低压的年代际转变[J].大气科学,2016,40(4):805-816,12.基金项目
国家自然科学基金项目41375086Funded by National Natural Science Foundation of China (Grant 41375086) （Grant 41375086）
