基于Noah-MP陆面模式的青藏高原地表感热和潜热通量分布及变化特征  

Characteristics of Distributions and Changes of Surface Sensible and Latent Heat Fluxes on the Qinghai-Xizang Plateau based on the Noah-MP Land Surface Model

作　　者：王树舟 马耀明 吴文玉[6,7] WANG Shuzhou;MA Yaoming;WU Wenyu(Key Laboratory of Meteorological Disasters of Ministry of Education/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,Nanjing University of Information Science and Technology,Nanjing 210044,Jiangsu,China;Land-Atmosphere Interaction and its Climatic Effects Group,State Key Laboratory of Tibetan Plateau Earth system,Resources and Environment,Beijing 100101,China;Key Laboratory of Tibetan Environment Changes and Land Surface Processes,Chinese Academy of Sciences,Beijing 100101,China;University of Chinese Academy of Sciences,Beijing 100049,China;Lanzhou University,Lanzhou 730000,Gansu,China;Anhui Institute of Meteorological Sciences,Hefei 230031,Anhui,China;Anhui Province Key Laboratory of Atmospheric Science and Satellite Remote Sensing,Hefei 230031,Anhui,China)

机构地区：[1]南京信息工程大学气象灾害教育部重点实验室/气象灾害预报预警与评估协同创新中心,江苏南京210044 [2]青藏高原地球系统与资源环境全国重点实验室地气作用与气候效应团队,北京100101 [3]中国科学院青藏高原环境变化与地表过程重点实验室,北京100101 [4]中国科学院大学,北京100049 [5]兰州大学,甘肃兰州730000 [6]安徽省气象科学研究所,安徽合肥230031 [7]安徽省大气科学与卫星遥感重点实验室,安徽合肥230031

出　　处：《高原气象》2023年第1期25-34,共10页Plateau Meteorology

基　　金：第二次青藏高原综合科学考察研究项目(2019QZKK010203);国家自然科学基金项目(42075156,91837208)。

摘　　要：利用中国区域高分辨率数据集作为大气强迫场,驱动修改了热力学粗糙度参数化方案后的NoahMP陆面模式进行了2000-2018年青藏高原地区陆面过程模拟。用野外观测资料校验模拟结果后,分析了地表感热通量(SH)、潜热通量(LH)的分布及变化特征。结果表明,模式能较合理模拟高原地表感热和潜热通量。高原的中、西部为地表感热和潜热通量的年际变率较大区域。模拟的高原中、西部地区感热通量强于东部地区,且绝大部分区域的感热通量是有增强趋势的。对于整个高原,感热通量从2002年前后呈较明显的增强趋势。总体上,四个季节的平均感热都有较明显的增强,特别是在2010年以后。潜热通量在高原东部地区强于中、西部地区。潜热通量的年际变率相对于感热通量的变率要小。中部地区潜热呈减弱趋势,西部和东部都有弱的增强。对于整个高原,潜热通量在2000-2018年呈弱的增强趋势。其中,2000-2003年潜热通量是增强的,2003-2015年呈减弱趋势,主要因素为在夏季潜热通量的减弱。The Noah-MP land surface model with modified thermal roughness length parameterization scheme was used for the simulation of land surface process on the Qinghai-Xizang Plateau(QXP) during 2000-2018, using the high-resolution meteorological forcing dataset for China. Characteristics of distributions and changes of surface sensible heat(SH) and latent heat(LH) fluxes on the QXP were analyzed after the verification of the simulation results against the in situ observation. It is found that the Noah-MP model can well simulate the surface sensible and latent heat fluxes on the QXP. The central and western QXP had larger inter-annual variations of sensible and latent heat fluxes. The sensible heat fluxes in the central and western QXP were larger than those in the eastern QXP. The sensible heat fluxes on the QXP exhibited an increasing trend. For the entire QXP, the increasing trend began probably from 2002. One the whole, the sensible heat fluxes in all seasons increased from then, especially after 2010. The latent heat fluxes in the eastern QXP were larger than those in central and western QXP. The variations of latent heat fluxes were smaller than sensible heat fluxes in the corresponding regions.The latent heat fluxes decreased in the central QXP, while increased in the eastern and western QXP. For the entire QXP, there was a weak increasing trend in latent heat fluxes. There was a decreasing trend during 2003-2015, after the increasing trend during 2000-2003. Overall, the increasing trend during 2000-2018 was weak, and that might due to the decrease in summer latent heat fluxes.

关 键 词：青藏高原 感热通量(SH) 潜热通量(LH) 数值模拟 

分 类 号：P404[天文地球—大气科学及气象学]