TY  - JOUR
AU  - Guo, Yamin
PY  - 2017
DA  - 2017//
TI  - An efficient hybrid method for estimating clear‐sky surface downward longwave radiation from MODIS data
JO  - Journal of Geophysical Research: Atmospheres
SP  - 2616
EP  - 2630
VL  - 122 %N 5 %Ksurface energy budget;surface downward longwave radiation;surface upwelling longwave radiation;MODIS;CWV;hybrid method
CY  - State Key Laboratory of Remote Sensing Science, Faculty of Geographical Science Beijing Normal University Beijing China ;; Department of Geographical Science University of Maryland College Park Maryland USA ;; Earth Resource Technology, Inc., NCWCP College Park Maryland USA
AB  - This paper proposes an efficient hybrid method for estimating 1 km instantaneous clear‐sky surface downward longwave radiation (LWDN) from Moderate Resolution Imaging Spectroradiometer (MODIS) thermal infrared observations and the MODIS near‐infrared column water vapor (CWV) data product. The LWDN was formulated as a nonlinear function of surface upwelling longwave radiation estimated from the MODIS top‐of‐atmosphere (TOA) radiance of channels 29, 31, and 32, as well as CWV and the MODIS TOA radiance of channel 29. Ground measurements collected at 62 globally distributed sites from six networks were used to develop and validate the proposed hybrid method. The validation results showed that the bias and root‐mean‐square error (RMSE) were 0.0597 W/m2 and 21.008 W/m2. These results demonstrate that the performance of our method is superior to that of other studies reported in the literature. The drawback of our method is that LWDN is overestimated over high‐elevation areas with extremely lo...
SN  - 2169-897X
UR  - https://kns.cnki.net/kcms2/article/abstract?v=FruxrO_GJXKtHu2oezJ3dq2n3jfNUYPtBfrZUFxnxsQMzeFiENIipOc0nmVNpHUyq62KpC8IQ9_F6Z46gMZFma5WH466fRcpT_DOFL9fmjqSDajEspV9uHbyk9f6BeId5lc_Ah2FAWFHvIvKt9Z3v3qct1TqqIkbn2UvOZWzDcE=&uniplatform=NZKPT&language=CHS
ID  - Guo2017
ER  -