Abstract
This study evaluated the Noah land-surface model performance to simulate the land-surface process during different weather conditions in the hinterland of the Taklimakan Desert. This study is based on observation data from the Taklimakan Desert Meteorology Field Experiment Station in 2014. The results illustrated that the energy-exchange process between the land surface and the atmosphere in the drifting desert can be simulated by Noah effectively. However, the effects of soil moisture and latent heat flux were very poor. For sunny days, the soil temperature and heat flux were underestimated significantly in the nighttime and overestimated in the daytime. The simulation results are very good in sand-dust weather. The simulation of heat flux and net radiation is very consistent with the observation during cloudy days. For rainy days, the model can successfully model the diurnal variation of soil moisture, but it has obvious deviations in the net radiation, heat flux, and soil heat flux.
Highlights
Land-atmosphere interactions consider the process of exchanging matter and energy between the land surface and the atmosphere on earth, which is influenced by the weather and climate change on different spatial and temporal scales [1]
The simulation errors are minimum in winter and summer and maximum in spring. e main reason of the large errors is that there are frequent sand-dust storms in spring in the Taklimakan Desert, where wind speed and direction were varied and a big temperature difference was seen between the day and the night of autumn. e performance of modelling soil temperature was very good in the range from − 10 to 15°C, while soil temperature was underestimated in the range from 16 to 45°C, especially in spring
We simulated the land-surface processes in the drifting desert of Taklimakan Desert’s hinterland using Noah. e observations of the annual variation in diurnal soil temperature and moisture, soil heat flux, sensible heat flux, latent heat flux, soil heat flux, and net radiation were compared with our simulations during four typical weather conditions
Summary
Land-atmosphere interactions consider the process of exchanging matter and energy between the land surface and the atmosphere on earth, which is influenced by the weather and climate change on different spatial and temporal scales [1]. Sensible heat transportation is the main form of exchanging energy between the land and the atmosphere in desert areas [5,6,7,8]. Due to their special land-surface features, the performance of current land-surface models to simulate the land-surface processes in deserts was not ideal [9]. Erefore, to address this deficiency in the simulations, researchers obtain field data of deserts to understand their landsurface parameters and their land-atmosphere interactions; by combining observations with simulations, the land-surface parameters and parameterization scheme were modified, and the performance of the model of the energy and material exchange process in the desert area was improved [10]
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