韩熠哲,马伟强. 2018. 南亚夏季风爆发前后青藏高原地表热通量的长期变化特征分析[J]. 气象学报, (0):-, doi:10.11676/qxxb2018.050
南亚夏季风爆发前后青藏高原地表热通量的长期变化特征分析
Long-term variation characteristics of surface heat flux over the Tibetan Plateau before and after the onset of the South Asian summer monsoon
投稿时间:2018-03-26  修订日期:2018-06-05
DOI:10.11676/qxxb2018.050
中文关键词:  青藏高原,再分析资料,感热通量,潜热通量
英文关键词:Tibetan  Plateau, Reanalysis  Data, Sensible  Heat Flux, Latent  Heat Flux
基金项目:第三次青藏高原科学试验-边界层与对流层观测(GYHY201406001);国家自然科学(91637312,91637313,41661144043和91737205);中国科学院“百人计划”(马伟强)和沿科学重点研究项目(QYZDJ-SSW-DQC019),欧盟第七框架项目“为气候再分析服务的地球观测数据验证”之第三课题。
作者单位E-mail
韩熠哲 中国科学院青藏高原研究所 hanyizhe@itpcas.ac.cn 
马伟强 中国科学院青藏高原研究所 wqma@itpcas.ac.cn 
摘要点击次数: 87
全文下载次数: 48
中文摘要:
      青藏高原作为世界第三极,其热力强迫作用不仅对亚洲季风系统的发展和维持十分重要,也会对大气环流场产生深远影响。利用欧洲中期天气预报中心(ECMWF)的ERA Interim中青藏高原及其周边地区的地表热通量月平均再分析资料,其时间序列为1979年至2016年的3-10月。通过分析得出以下结论:3-5月青藏高原主体由感热占据,且感热强度快速上升且呈西高东低的分布态势,潜热强度较小但随时间变化增强。季风爆发后的6-8月,高原感热强度减弱,潜热强度迅速增强且呈东高西低的分布趋势。季风消退后的9-10月,感热与潜热强度相当,但感热呈现西高东低的分布趋势。过去38年间,高原地表感热总体呈现微弱下降趋势,潜热呈较弱上升趋势。高原西部地区感热呈微弱下降趋势,潜热呈上升趋势。东部感热呈较为明显的下降趋势且近年来变化趋势增强,东部潜热通量则呈现较为明显的上升趋势,分析结论与近期全球变暖条件下青藏高原气候变暖变湿这一变化状况一致,通过对青藏高原地表热通量的变化分析为下一步运用第三次青藏高原大气科学试验所获资料分析高原上空大气热源的变化以及地表加热场如何影响大气环流奠定基础。
英文摘要:
      As the “Third Pole of the world”, the thermal forcing of the Tibetan Plateau is very important for Asian summer monsoon system, it also have a great influence on atmospheric circulation field. In this paper, the ERA interim monthly mean reanalysis data of surface heat fluxes in the Tibetan Plateau and its surrounding areas of the European Medium Weather Forecasting Center (ECMWF) is used. The time series is from 1979 to 2016 in March-October. Through the analysis of the above information, the following conclusions are drawn: from March to May, The main part of the Tibetan Plateau is occupied by sensible heat flux, it increased rapidly and is high in west, the change of latent heat flux is smaller but increased with time. After the onset of Asian summer monsoon, the sensible heat flux over the Tibetan Plateau decreased and latent heat flux increased rapidly. The distribution of latent heat is high in east part of Tibetan Plateau and it is lower in the west. After the Asian summer monsoon, the intensity of sensible heat and latent heat is close to each other, sensible heat flux is high in the west and lower in the east. The surface sensible heat of the Tibetan Plateau showed a slightly downward trend, latent heat showed an increasing trend over the past 38 years. The sensible heat in the western part of the Tibetan Plateau showed a weak decreased trend, the latent heat was increasing. In the eastern part of Tibetan Plateau, sensible heat was decreased and the latent heat showed a more obvious upward trend, which is also consistent with the climate change in the Tibetan Plateau. This is the basis for the next step that using the data from The Third Qinghai-Xizang Plateau Atmospheric Science Experiment to analyzing the change of atmospheric heat flux over Tibetan Plateau and how the surface heating field affects the atmospheric circulation.
查看全文   查看/发表评论  下载PDF阅读器
分享按钮