An efficient hybrid method for estimating clear‐sky surface downward longwave radiation from MODIS data

Journal of Geophysical Research D: Atmospheres - Tập 122 Số 5 - Trang 2616-2630 - 2017
Jie Cheng1, Shunlin Liang2,1, Wenhui Wang3, Yamin Guo1
1State Key Laboratory of Remote Sensing Science, Faculty of Geographical Science, Beijing Normal University, Beijing, China
2Department of Geographical Science, University of Maryland, College Park, Maryland, USA
3Earth Resource Technology, Inc., NCWCP, College Park, Maryland, USA

Tóm tắt

AbstractThis 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 low CWV (<0.5 g/cm2) and underestimated over regions with tropical climates that have extremely high CWV. A power function relating LWDN to CWV was derived and used as a complementary method to address these circumstances. The overestimation was overcome, and the bias and RMSE decreased from 9.407 W/m2 and 23.919 W/m2 to −0.924 W/m2 and 19.895 W/m2. The underestimation was also alleviated.

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Tài liệu tham khảo

10.1175/1520-0477(2000)081<2341:SANSRB>2.3.CO;2

10.1175/1520-0477(2001)082<2415:FANTTS>2.3.CO;2

10.1002/qj.49705824704

10.1029/WR011i005p00742

10.1007/s00704-013-0891-3

CEOS andWMO(2000) CEOS/WMO online database: Satellite system and requirements The Committee on Earth Observation Satellites The World Meteorological Organization.

10.1109/TGRS.2010.2098881

10.1109/TGRS.2016.253765

10.1175/1520-0450(1999)038<0474:AIPFEE>2.0.CO;2

Diak G. R., 2005, Satellite‐based estimates of longwave radiation for agricultural applications, Agric. For. Meteorol., 103, 1517

10.1007/BF00865507

10.1016/0034-4257(94)00067-W

10.1029/2009JD013635

10.1175/1520-0426(2004)021<0742:VOPAUT>2.0.CO;2

10.1175/2010JAMC2463.1

10.1175/1520-0450(1968)007<0716:AAOTHC>2.0.CO;2

10.1016/j.jastp.2003.07.007

10.1029/2003JD003480

10.1109/36.701075

Lee H.‐T., 1993, Development of a Statistical Technique for Estimating the Downward Longwave Radiation at the Surface From Satellite Observations

10.1175/1520-0426(2002)019<1500:DOANSM>2.0.CO;2

10.1109/JSTARS.2010.2053570

10.1109/JSTARS.2010.2048556

10.1029/2011JD016160

10.1007/s00704-004-0104-1

10.1364/OE.18.009542

10.1002/qj.49708737205

10.1029/2011JD016917

Naud C. M., 2013, Sensitivity of downward longwave surface radiation to moisture and cloud changes in a high‐elevation region, J. Atmos., 118, 10,072

10.1080/01431161.2016.1168950

10.1175/1520-0477(1998)079<2115:BSRNBW>2.0.CO;2

10.1029/2008JD011230

10.1002/qj.49712253306

10.1080/01431160010006971

10.1080/00401706.1999.10485594

10.1016/0169-8095(89)90023-9

Smith W. L. andH. M.WooIf(1983) Geostationary satellite sounder (VAS) observations of longwave radiation flux paper presented at Satellite Systems to Measure Radiation Budget Parameters and Climate Change Signal Int. Radiat. Comm. Igls Austria Aug. 29–Sept. 2.

10.1002/qj.49708938105

10.1016/j.rse.2008.04.004

10.1016/j.rse.2006.06.026

10.1002/rog.20009

Wang T., 2013, Consistent retrieval methods to estimate land surface shortwave and longwave radiative flux components under clear‐sky conditions, Remote Sens. Environ., 124

10.1016/j.rse.2008.12.004

10.1109/LGRS.2010.2046472

10.1016/j.rse.2007.05.024

10.1109/TGRS.2008.2005206

10.1007/s00382-00014-02430-z

10.1109/TGRS.2008.2005109

10.1016/j.agrformet.2009.08.004

10.1109/TGRS.2015.2475615

10.1029/2006JD008159

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Journal of Geophysical Research D: Atmospheres

Tập 122 Số 5

2616-2630

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