Chlorophyll α content in the Indian sector of the Antarctic Ocean

• Main Authors: Kenji Yamagata, Fukashi Fukui
• Format: Article in Journal/Newspaper
• Language: English; Japanese
• Published: National Institute of Polar Research 1981
• Subjects: Geography (General); G1-922; Antarctic; Antarctic Ocean; Indian; The Antarctic; Antarc*
• Online Access: https://doi.org/10.15094/00008259; https://doaj.org/article/eee2b7dde2c24fd296749a38cd7f2eff

Measurement of chlorophyll a in the Indian sector of the Antarctic Ocean was carried out during the cruise of R. V. KAIYO MARU of the Fisheries Agency, from December 1979 to March 1980. The chlorophyll a content in the surface water was measured at stations from Fremantle to the station of 61°S, 100°E (1/7-1/15,1980) and from the station of 61°S, 120°E to Melbourne (1/27-2/8,1980). The surface water chlorophyll a content in the former course ranged from 0.05 to 0.44mg/m^3,and in the latter it ranged from 0.02 to 0.18mg/m^3. Surface water chlorophyll a was larger on the outward leg than on the homeward leg. The chlorophyll a content at 36 stations which were arranged along five transections in the survey area was measured on water samples taken from 10 layers between the surface and the depth of 200m. The chlorophyll a content ranged from 0.00 to 0.95mg/m^3. The water mass which contained more than 0.5mg/m^3 chlorophyll a could be regarded as a core in the subsurface water. The chlorophyll a peaks were observed near the picnocline at most of the stations.