Surface phytoplankton chlorophyll distribution continuously observed in the JARE-26 cruise (1984/85) to Syowa Station, Antarctica (SIBEX II)

• Main Authors: Mitsuo Fukuchi, Yasushi Fukuda, Masao Ohno, Hiroshi Hattori
• Format: Report
• Language: English
• Published: National Institute of Polar Research/Biological Laboratory, Faculty of Education, Kumamoto University/Usa Marine Biological Institute, Kochi University/Faculty of Agriculture, Tohoku University 1986
• Subjects: Antarctic; Antarctic Ocean; Indian; Syowa Station; The Antarctic; Antarc*; Antarctica; Memoirs of National Institute of Polar Research; Polar Research
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2028; http://id.nii.ac.jp/1291/00002028/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2028&item_no=1&attribute_id=18&file_no=1

A continuous measuring-recording system of surface chlorophyll α, which is equipped with a personal computer, was used in the 26th Japanese Antarctic Research Expedition (JARE-26) cruise of icebreaker SHIRASE to Syowa Station, Antarctica, in 1984-1985 as part of the Second International BIOMASS program. Geographical distribution of chlorophyll α observed on the southward leg through the eastern part of the Indian Antarctic Ocean in early-middle December and that on the northward leg through the western part of the Ocean in late February-early March coincided with the previous JARE observations. Comparing the data obtained on both legs, seasonal difference was also indicated; level of chlorophyll was high in December but low in February-March. Maximum concentration reached 1.55μg/ℓ in the north of the Antarctic Convergence in December. Variable, positive or negative relationships between temperature and chlorophyll α were observed in the zones of the Subtropical Convergence, Subantarctic Front and Antarctic Convergence.