ECOLOGICAL OBSERVATIONS ON COLOURED LAYER OF COASTAL FAST ICE IN GREAT WALL BAY, KING GEORGE ISLAND, ANTARCTICA

Advances in Polar Science ›› 1991, Vol. 02 ›› Issue (01) : 39-45.

Lu Peiding,Zhang Kuncheng,Huang Fengpeng,Kentaro Watanabe

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Marine biological and environmental investigations were carried out on the coastatl waters off Great Wall Station (62°13′s, 58°58′W) on King George Island, Antarctica, from November 17, 1988, to March 3, 1989. Coastal fast ice covered inner part of Great Wall Bay until mid-December 1988, which allowed us to take ice core sampling and observations from mid-November to early December 1988. During this period, ice thickness ranged from 90 to 70cm with baout 20cm of snow cover. About 5cm brown layer occured in the middle part of fast ice core collected on November 20, 1988 at site 2, and two brown layers occured in the interior of ice core collected on November 17, 20 and 26, 1988 at site 5.

In comparison to the water column, chlorophyll-a concentration in fast ice was higher, which ranged from 2.55 to 56.84mg/m⁸, and most of them were conccntracted in the interior layers of sea ice rather than in the bottom layer often observed in other sea ice areas, such as in Syowa, Davis, Casey Station and McMurdo Sound areas, etc. This might be a result of the difference in structure and formation procese of sea ice.

Meanwhile, temperature, transparency, nutrients and chlorophyll-α in water column were measured. Microalgal assemblages both in fast ice and water column of Great Wall Bay were reported.

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Lu Peiding,Zhang Kuncheng,Huang Fengpeng,Kentaro Watanabe. ECOLOGICAL OBSERVATIONS ON COLOURED LAYER OF COASTAL FAST ICE IN GREAT WALL BAY, KING GEORGE ISLAND, ANTARCTICA. Advances in Polar Science. 1991, 02(01): 39-45

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1900-01-01	2019-05-21	2019-05-21	1991-02-25
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1991-06-01

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