TY - JOUR
T1 - Difference characteristics of sea surface temperature observed by GLI and AMSR aboard ADEOS-II
AU - Hosoda, Kohtaro
AU - Murakami, Hiroshi
AU - Shibata, Akira
AU - Sakaida, Futoki
AU - Kawamura, Hiroshi
N1 - Funding Information:
We are grateful to members of JAXA/EORC for their thoughtful comments on this manuscript. Comments from the editor and three anonymous reviewers were very helpful and greatly inproved the manuscript. The SeaWinds data were obtained from NASA/JPL via ftp. This study is supported by the ADEOS-II project of JAXA Japan, and Category 7 of MEXT PR2002 Project for Sustainable Coexistence of Human, Nature and the Earth and Special Coordination Fund for Promoting Science and Technology “New Generation SST” of MEXT, Japan.
PY - 2006/6
Y1 - 2006/6
N2 - This study compares infrared and microwave measurements of sea surface temperature (SST) obtained by a single satellite. The simultaneous observation from the Global Imager (GLI: infrared) and the Advanced Microwave Scanning Radiometer (AMSR: microwave) aboard the Advanced Earth Observing Satellite-II (ADEOS-II) provided an opportunity for the intercomparison. The GLI-and AMSR-derived SSTs from April to October 2003 are analyzed with other ancillary data including surface wind speed and water vapor retrieved by AMSR and SeaWinds on ADEOS-II. We found no measurable bias (defined as GLI minus AMSR), while the standard deviation of difference is less than 1°C. In low water vapor conditions, the GLI SST has a positive bias less than 0.2°C, and in high water vapor conditions, it has a negative (positive) bias during the daytime (nighttime). The low spatial resolution of AMSR is another factor underlying the geographical distribution of the differences. The cloud detection problem in the GLI algorithm also affects the difference. The large differences in high-latitude region during the nighttime might be due to the GLI cloud-detection algorithm. AMSR SST has a negative bias during the daytime with low wind speed (less than 7 ms-1), which might be related to the correction for surface wind effects in the AMSR SST algorithm.
AB - This study compares infrared and microwave measurements of sea surface temperature (SST) obtained by a single satellite. The simultaneous observation from the Global Imager (GLI: infrared) and the Advanced Microwave Scanning Radiometer (AMSR: microwave) aboard the Advanced Earth Observing Satellite-II (ADEOS-II) provided an opportunity for the intercomparison. The GLI-and AMSR-derived SSTs from April to October 2003 are analyzed with other ancillary data including surface wind speed and water vapor retrieved by AMSR and SeaWinds on ADEOS-II. We found no measurable bias (defined as GLI minus AMSR), while the standard deviation of difference is less than 1°C. In low water vapor conditions, the GLI SST has a positive bias less than 0.2°C, and in high water vapor conditions, it has a negative (positive) bias during the daytime (nighttime). The low spatial resolution of AMSR is another factor underlying the geographical distribution of the differences. The cloud detection problem in the GLI algorithm also affects the difference. The large differences in high-latitude region during the nighttime might be due to the GLI cloud-detection algorithm. AMSR SST has a negative bias during the daytime with low wind speed (less than 7 ms-1), which might be related to the correction for surface wind effects in the AMSR SST algorithm.
KW - Infrared SST
KW - Microwave SST
KW - Satellite observation
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U2 - 10.1007/s10872-006-0059-1
DO - 10.1007/s10872-006-0059-1
M3 - Article
AN - SCOPUS:33745324355
SN - 0916-8370
VL - 62
SP - 339
EP - 350
JO - Journal of Oceanography
JF - Journal of Oceanography
IS - 3
ER -