Direct estimation of land-surface diurnal temperature cycle model parameters from MSG-SEVIRI brightness temperatures under clear sky conditions
Direct estimation of land-surface diurnal temperature cycle model parameters from MSG-SEVIRI brightness temperatures under clear sky conditions
复制标题
晴空条件下MSG-SEVIRI亮温直接估计地表昼夜温度循环模型参数
DOI：
10.1016/j.rse.2014.04.017
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发表时间：
2014-07-01
影响因子：
13.5
通讯作者：
Tang, Ronglin
中科院分区：
文献类型：
--
作者：
Duan, Si-Bo;Li, Zhao-Liang;Tang, Ronglin
陆面温度日循环（DTC）及其模式参数表征了陆面的热力性质。在这项研究中，我们提出了一种方法来估计陆面温差（Δ Ts）从顶的大气亮温的MSG-SEVIRI通道9（10.8 μ m）和10（12.0 μ m）的日周期。将DTC模型拟合到AT的日变化过程中，可以直接确定陆面DTC模型的参数，而不需要借助于陆面温度和比辐射率。DTC模型的性能进行了评估，使用MSG-SEVIRI像素在不同的土地覆盖类型。结果表明，对于大多数像素，DTC模型的拟合精度（均方根误差）优于1 K。分析了气温日较差、最高气温出现时间和衰减常数的空间分布特征，并提出了这些参数的应用前景。这些参数被证明是有关的土地表面的物理性质，并可能带来新的见解热惯量和土壤水分的估计。(C)版权所有© 2014 Elsevier Inc.
The land-surface diurnal temperature cycle (DTC) and its model parameters characterize the thermal properties of the land surface. In this study, we propose a method to estimate the diurnal cycle of land surface temperature difference (Delta T-s) from the top-of-the-atmosphere brightness temperatures of MSG-SEVIRI channels 9 (10.8 mu m) and 10 (12.0 mu m). Fitting a DTC model to the diurnal cycle of AT, can directly determine the land-surface DTC model parameters without resorting to land surface temperature and emissivity. The performance of the DTC model was evaluated using MSG-SEVIRI pixels over different land cover types. The results show that the fitting accuracy (root mean square error) of the DTC model is better than 1 K for most pixels. The spatial patterns of diurnal temperature range, time of maximum temperature, and attenuation constant were analyzed, and the potential applications of these parameters are presented. These parameters are shown to be related to the physical properties of the land surface and may bring new insight into the estimation of thermal inertia and soil moisture. (C) 2014 Elsevier Inc All rights reserved.