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Advances in Meteorology
Volume 2016, Article ID 4849525, 13 pages
http://dx.doi.org/10.1155/2016/4849525
Research Article

Simulating the Energy and Water Fluxes from Two Alkaline Desert Ecosystems over Central Asia

1College of Grassland and Environment Sciences, Xinjiang Agricultural University, Urumqi 830052, China
2State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China

Received 15 September 2015; Revised 13 November 2015; Accepted 16 November 2015

Academic Editor: Sergio M. Vicente-Serrano

Copyright © 2016 Chang-Qing Jing and Long-Hui Li. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The Central Asia region is covered by vast desert ecosystems, where the characteristic of energy and water fluxes is different from other humid ecosystems. The application of land surface models (LSMs) in arid and semiarid ecosystems was largely limited. This paper presents a detailed evaluation of Common Land Model (CoLM) at two eddy covariance (EC) sites in alkaline desert ecosystems over Central Asia. Simulations of the net radiation (), latent heat flux (), sensible heat flux (), and soil temperature showed that refined estimate of roughness length () significantly improved the performance of CoLM in simulating turbulent heat fluxes. was increased but was decreased, which were in better agreement with the observations from EC system. The results indicated that accurate parameterization of is of crucial importance for predicting energy and water fluxes in LSM when applied in Central Asia desert ecosystems. Sensitivity analysis regarding leaf area index (LAI), , and albedo () showed that is very sensitive to but , , and soil temperature () are sensitively varying with the estimate of at the two EC sites over Central Asia.