1988／1989年夏季南极长城海湾生态环境观测

自１９８８年１１月至１９８９年３月，对南极长城湾（６２°１３′Ｓ，５８°５７′Ｗ）中５个站位的水温、ｐＨ值、海水透明度、水下照度、水中和海冰中叶绿素含量、磷酸盐含量、亚硝酸盐和硝酸盐含量等理化要素，每月进行１至２次不定期的常规测定。在整个调查期间，海水温度变化范围在－１．６～２．２°Ｃ之间，ｐＨ值变化范围在８．０～９．１之间，海水中叶绿素ａ的变化范围在０．３０～１．４８ｍｇ／ｍ３之间，叶绿素ａ的最大值出现在１１月２６日５号站的表层水中，海冰中叶绿素ａ的含量远远高于海水中的含量，海冰中叶绿素ａ的变化范围在２．５５～５６．８４ｍｇ／ｍ３之间。磷酸盐含量变化范围在１．０２３～２．１８７μｇＰ／Ｌ，亚硝酸盐含量变化范围在０．０９３～０．１８６μｇＮ／Ｌ之间，硝酸盐含量变化范围在１３．３０８～２６．５８４μｇＮ／Ｌ之间。本文对以上结果作了初步探讨

OBSERVATIONS ON ECOLOGICAL ENVIRONMENTAL CONDITION OF THE GREAT WALL BAY,KING GEORGE ISLAND, ANTARCTICA,FROM NOVEMBER 1988 TO MARCH 1989

Physical and chemical factors, chlorophyll a in water column were measured in the Great Wall Bay, King George Island,Antarctica during austral summer in 1988-1989.Routine samples of water were taken at five sites with water depth ranges from 14 to over 100m. Water temperature and pH ranged from -1.6 to 2.2°C and from 8.0 to 9.1 respectively. Transparency of sea water ranged from 4m to 13m. Concentrations of phosphate, nitrate and nitrite ranged from 0.738 to 4.873μg P/L,6.181 to 25.945μg N/L and 0.017 to 0.273 μg N/L respectively. Chlorophyll a concentration in water column ranged from 0.21 to 2.67 mg/m 3.The maximum of chlorophyll a(2.67 mg/m 3) was observed at surface water on 26 November 1988 at site 5. In comparison with the water, chlorophyll-a concentration in the fast ice was higher,which ranged from 2.55 to 56.84 mg/m 3 and most of them were concentrated in the interior layer of sea ice rather than in the bottom layer which often observed in other sea ice such as Davis, Syowa, Casey and McMurdo Sound etc.