气候变化研究进展2018，Vol.14Issue(2)：127-136,10.DOI:10.12006/j.issn.1673-1719.2017.058
青藏高原中东部地区地表感热通量的时空变化特征
Temporal and spatial variation of surface sensitive heat fluxes over the middle and eastern Tibetan Plateau
摘要
Abstract
Based on the site data of the Tibetan Plateau (TP) from 1970 to 2015, the sensible heat fluxes over the middle and eastern Tibetan Plateau were calculated by physical method. Moreover, according to the discrimination of average heat transfer coefficients over the middle and eastern TP, utilizing wavelet analysis, correlation analysis, we divided TP whose altitude is more than 3000 m into 7 areas to study the temporal and spatial characteristics of the sensible heat fluxes and impact factors over the TP during 1970–2015. It shows that the annual average and spring as well as summer season, sensible heat fluxes period was 3-4 a, while autumn and winter season 2-3 a. The trend of the sensible heat fluxes was increasing during 1970-1980 and 2001-2015, and decreasing during 1980-2001. The strongest heat center (maximum value of sensible heat fluxes) which include annual average and seasonal average emerged in area E (southern slope). However, the minimum value appears in area A of western TP (except summer). Its distribution was uniform in spring and autumn, and presented conspicuous gradient distribution in summer and in winter. In summer, the gradient direction was from east to west, while it was adverse in winter. Although correlation of annual averaged precipitation and annual averaged sensible heat fluxes was not high, it manifested high correlation in spring, summer and autumn. The seasonal transformation of the sensible heat flux was jointly determined by the variation of the 10 m extreme wind speed along the northward and southward and the ground-air temperature difference.关键词
感热通量/周期/影响因子/相关Key words
Sensible heat fluxes/Period/Impact factor/Correlation引用本文复制引用
张超,田荣湘,茆慧玲,张志非,申紫薇..青藏高原中东部地区地表感热通量的时空变化特征[J].气候变化研究进展,2018,14(2):127-136,10.基金项目
国家自然科学基金项目(91337212) （91337212）
