TY - JOUR
T1 - Inter-annual variability of chlorophyll and sea-ice in the Antarctic Divergence region
T2 - An attempt to derive their quantitative relationship
AU - Hirawake, T.
AU - Kudoh, S.
AU - Aoki, S.
AU - Odate, T.
AU - Fukuchi, M.
N1 - Funding Information:
We would like to thank the SeaWiFS Project and the Distributed Active Archive Center (DAAC) at the Goddard Space Flight Center (GSFC), USA for production and distribution of these data. We would also like to thank NSIDC for providing the DMSP SSM/I sea-ice concentration data. This study was supported by the Japanese Antarctic Research Expedition (JARE) under the Ministry of Education, Culture, Sports, Science and Technology.
PY - 2005/5/20
Y1 - 2005/5/20
N2 - Inter-annual variability in chlorophyll a (chl a) and sea-ice concentration in the Antarctic Divergence (AD) region near 140°E was examined using satellite sensor data in order to derive a quantitative relationship between the two. Seaviewing Wide Field-of-view Sensor (SeaWiFS) derived chl a and Special Sensor Microwave/Imager (SSM/I) derived sea-ice concentration data during 1997-2003 were analysed. Mean chl a concentration south of 64°S during the period between September and April (from austral spring to autumn) of each year was calculated. The mean chl a in 2001/2002 was extremely high (1.08 mg m-3) within the six periods between 1997/1998 and 2002/2003. Simply integrated indices on sea-ice amount, such as the maximum sea-ice extent in the winter season, annual integration of coverage area over ice edge to coast, were not able to explain interannual variation of chl a, especially the highest chl a value in 2001/2002. We found a high correlation between the chl a south of 64°S and the sea-ice index, which might be due to the surface meltwater of the sea-ice from the AD zone as a result of eddies. The quantitative relationship might have contributed to the prediction of phytoplankton blooms in this coastal region and demonstrated the impact of the sea-ice extent on the Antarctic marine ecosystem.
AB - Inter-annual variability in chlorophyll a (chl a) and sea-ice concentration in the Antarctic Divergence (AD) region near 140°E was examined using satellite sensor data in order to derive a quantitative relationship between the two. Seaviewing Wide Field-of-view Sensor (SeaWiFS) derived chl a and Special Sensor Microwave/Imager (SSM/I) derived sea-ice concentration data during 1997-2003 were analysed. Mean chl a concentration south of 64°S during the period between September and April (from austral spring to autumn) of each year was calculated. The mean chl a in 2001/2002 was extremely high (1.08 mg m-3) within the six periods between 1997/1998 and 2002/2003. Simply integrated indices on sea-ice amount, such as the maximum sea-ice extent in the winter season, annual integration of coverage area over ice edge to coast, were not able to explain interannual variation of chl a, especially the highest chl a value in 2001/2002. We found a high correlation between the chl a south of 64°S and the sea-ice index, which might be due to the surface meltwater of the sea-ice from the AD zone as a result of eddies. The quantitative relationship might have contributed to the prediction of phytoplankton blooms in this coastal region and demonstrated the impact of the sea-ice extent on the Antarctic marine ecosystem.
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U2 - 10.1080/01431160500075733
DO - 10.1080/01431160500075733
M3 - Article
AN - SCOPUS:22144468438
SN - 0143-1161
VL - 26
SP - 2035
EP - 2044
JO - International Joural of Remote Sensing
JF - International Joural of Remote Sensing
IS - 10
ER -
