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

Abstract

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.

Keywords

• qinghai-xizang plateau
• sensible heat fluxes （sh）
• latent heat fluxes （lh）
• numerical simulation