Daytime Land Surface Temperature Extraction from MODIS Thermal Infrared Data under Cirrus Clouds.
Daytime Land Surface Temperature Extraction from MODIS Thermal Infrared Data under Cirrus Clouds.
复制标题
卷云下 MODIS 热红外数据提取白天地表温度
DOI：
10.3390/s150509942
复制
发表时间：
2015-04-28
期刊：
影响因子：
--
通讯作者：
Li ZL
中科院分区：
文献类型：
--
作者：
Fan X;Tang BH;Wu H;Yan G;Li ZL
模拟数据表明，当卷云光学深度（COD）为0.55 μm（0.4）时，采用广义分窗（GSW）算法反演地表温度（LST）的最大误差为11.0 K。在GSW算法中加入COD线性函数的修正项，将GSW算法扩展到卷云多云条件下。通过0.55 μm处的孤立卷云双向反射率查表获得COD。将线性函数的斜率k表示为MODIS 31-34通道大气亮度温度顶部的多元线性模型和分窗通道发射率之差。模拟数据表明，LST误差可以从11.0 K减小到2.2 K。灵敏度分析表明，输入参数的所有不确定性、扩展算法精度和GSW算法精度的最小误差均小于2.5 K。最后，通过浮标测量的五大湖地表水温度数据表明，采用本文提出的卷云天空扩展算法，GSW算法的检索精度提高了至少1.5 K。
Simulated data showed that cirrus clouds could lead to a maximum land surface temperature (LST) retrieval error of 11.0 K when using the generalized split-window (GSW) algorithm with a cirrus optical depth (COD) at 0.55 μm of 0.4 and in nadir view. A correction term in the COD linear function was added to the GSW algorithm to extend the GSW algorithm to cirrus cloudy conditions. The COD was acquired by a look up table of the isolated cirrus bidirectional reflectance at 0.55 μm. Additionally, the slope k of the linear function was expressed as a multiple linear model of the top of the atmospheric brightness temperatures of MODIS channels 31–34 and as the difference between split-window channel emissivities. The simulated data showed that the LST error could be reduced from 11.0 to 2.2 K. The sensitivity analysis indicated that the total errors from all the uncertainties of input parameters, extension algorithm accuracy, and GSW algorithm accuracy were less than 2.5 K in nadir view. Finally, the Great Lakes surface water temperatures measured by buoys showed that the retrieval accuracy of the GSW algorithm was improved by at least 1.5 K using the proposed extension algorithm for cirrus skies.
登录
查看更多内容
DOI：
10.1175/jam2309.1
发表时间：
2005-12-01
期刊：
JOURNAL OF APPLIED METEOROLOGY
影响因子：
--
作者：
Baum, BA;Yang, P;Bedka, ST
通讯作者：
Bedka, ST
影响因子：
3.4
作者：
BECKER, F;LI, ZL
通讯作者：
LI, ZL
影响因子：
8.2
作者：
Wan, ZM;Dozier, J
通讯作者：
Dozier, J
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
影响因子：
13.5
作者：
Duan, Si-Bo;Li, Zhao-Liang;Tang, Ronglin
通讯作者：
Tang, Ronglin
一种新的参数化方案，用于通过连续的表面温度、空气温度和表面净辐射测量来估计表面能量通量
影响因子：
5.4
作者：
Lu, Jing;Tang, Ronglin;Li, Zhao-Liang
通讯作者：
Li, Zhao-Liang