Investigating spatiotemporal changes of the land-surface processes in Xinjiang using high-resolution CLM3.5 and CLDAS: Soil temperature.

Investigating spatiotemporal changes of the land-surface processes in Xinjiang using high-resolution CLM3.5 and CLDAS: Soil temperature.
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利用高分辨率CLM3.5和CLDAS研究新疆地表过程时空变化:土壤温度

DOI:
10.1038/s41598-017-10665-8
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发表时间:
2017-10-16
期刊:
影响因子:
4.6
通讯作者:
Ji X
Ji X
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Meng X;Wang H;Wu Y;Long A;Wang J;Shi C;Ji X

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土壤温度在地表过程中起着关键作用,因为该参数影响土壤中一系列物理、化学和生物过程,如水热通量。然而,土壤温度的观测相当有限,特别是在区域尺度上。因此,本研究利用中国气象局陆面数据同化系统(CLDAS)的大气近地表强迫数据,通过社区陆面模式3.5(CLM3.5)来研究中国新疆土壤温度的时空特征。我们使用研究区域内2009年至2012年从105个国家自动站收集的观测土壤温度数据来验证模拟能力。对比结果表明,采用CLDAS驱动场的CLM3.5能够很好地模拟在小时、日和月时间尺度以及三个深度(5厘米、20厘米和80厘米)的土壤温度时空模式。我们还生成了该区域一个在时间和空间上连续且具有高分辨率(约6.25千米)的土壤温度数据库。总体而言,这项研究有助于了解土壤温度的区域和垂直特征,并为其他地表过程提供重要的科学依据。
Soil temperature plays a key role in the land surface processes because this parameter affects a series of physical, chemical, and biological processes in the soil, such as water and heat fluxes. However, observation of soil temperature is quite limited, especially at the regional scale. Therefore, this study is to investigate the spatiotemporal features of soil temperature in Xinjiang, China, using the Community Land model 3.5 (CLM3.5) with the atmospheric near-surface forcing data of the China Meteorological Administration Land Data Assimilation System (CLDAS). We use the observed soil temperature data collected from 105 national automatic stations during 2009 through 2012 in the study area to verify the simulation capability. The comparison results indicate that the CLM3.5 with the CLDAS driving field could well simulate the spatiotemporal patterns of the soil temperature at hourly, daily, and monthly time scales and at three depths (5 cm, 20 cm, and 80 cm). We also produce a soil temperature database of the region that is continuous both in time and space with high resolution (about 6.25 km). Overall, this study could help understand the regional and vertical characteristics of the soil temperature and provide an important scientific basis for other land-surface processes.
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