地表感热的时空分布特征及其与邻近海洋海温异常的关系

Temporal and Spatial Patterns of Surface Sensible Heat Flux and Their Relationship with the SST Anomaly over Adjacent Oceans

利用1949—2000年NCEP/NCAR再分析资料中的地表感热通量资料,分析了全球地表感热的时空分布特征。结果表明:青藏高原地表感热是全球感热的主要部分,高原地表热源表现出明显的非均匀性,高原东西部热源呈反位相变化。高原西部、东部和北非地区是地表感热年际和年代际异常的关键区。SVD分析发现,高原东、西部感热异常与西北太平洋和赤道中印度洋的海温异常有很好的相关关系。

Using the NCEP/NCAR reanalysis monthly mean sensible heat fluxes from 1949 to 2000,the temporal and spatial patterns of the global surface heat fluxes are analyzed. The results show that the surface sensible heat of the Qinghai-Xizang Plateau (QXP) is the main part of the global surface sensible heat, and has remarkable asymmetric characters with opposite time variations in the west-QXP and east-QXP. It is found that the west-QXP and east-QXP and the north Africa are the key regions with evident interannual and interdecadal variations of the surface sensible heat fluxes. Using SVD technique, it is also found that there are good relations between the sensible heat anomalies of the west- and east-QXP, and the SSTA in the Northwestern Pacific Ocean and the equatorial central Indian Ocean.