北冰洋沉积物和海水叶绿素α浓度分布的区域性特征  

The Areal Characteristics of Chlorophyll α Distribution in the Sediments and Seawater in the Surveyed Area, Arctic Ocean

作　　者：刘子琳[1,2] 陈建芳[1,2] 刘艳岚[3] 张宏[1,2] 陈忠元[1,2] 张海生[1,2] 

机构地区：[1]国家海洋局海洋生态系统与生物地球化学重点实验室,杭州310012 [2]国家海洋局第二海洋研究所,杭州310012 [3]杭州广播电视大学,杭州310012

出　　处：《沉积学报》2008年第6期1035-1042,共8页Acta Sedimentologica Sinica

基　　金：国家自然科学基金(批准号:.40476004;40476003;40876103);中国第二次北极科学考察资助项目

摘　　要：2003年夏季中国第二次北极科学考察期间,在北冰洋楚科奇海陆架、楚科奇海台、陆坡流区、门捷列夫海岭和加拿大海盆等不同区域进行了200m以浅海水和部分观察站沉积物表层叶绿素a浓度的现场观测。结果表明,观测水体叶绿素α浓度变化范围为0.002～39.008μg/dm3。表层浓度分布范围为0.037～4.644μg/dm3,平均值为0.612μg/dm3;高叶绿素α浓度出现在水深20～30m的次表层水。叶绿素α浓度分布具有明显的区域性特征,水柱平均浓度的次序为楚科奇海陆架区>陆坡流区>楚科奇海台区>加拿大海盆区>门捷列夫海岭区。表层沉积物叶绿素α浓度从未能检出～3.978μg/g(湿重),平均浓度为0.954μg/g(湿重),表现为沉积物表层的浓度高于下层,陆架和陆坡流区的浓度高于海岭区以及海台和海盆区的分布特征。Investigations of chlorophyll α was carried out in the seawater and sediment in the Chukchi Sea, Chukchi Plateau, the Slop-flow area, the Mendeleev Ride and the Canada Basin during the 2^nd Chinese National Arctic Research Expedition in the summer of 2003. The results showed that chlorophyll α concentrations were 0. 002 - 39. 008 μg/dm^3 at the surveyed waters; the surface chlorophyll α concentrations were 0.037 -4.644μg/dm^3 and the average value was 0. 612 μg/dm^3 in the surveyed area. Chlorophyll α concentrations at the depths 20 - 30 m of the subsurface water were higher than that in the surface and under layer. Chlorophyll α concentration distribution was obviously areal characteristics. The areal arrange order of the water-column chlorophyll α concentration is the Chukehi Sea 〉 the Slop-flow area 〉 the Chukchi Plateau 〉 the Canada Basin 〉 the Mendeleev Ride. Chlorophyll α concentrations were 0 - 3. 978 μg/g （wet mug） in the sediment of the surveyed stations ; and the average value was 0. 934 μg/g（wet mug） in 7 surveyed stations. Chlorophyll α concentrations at the surface sediments were higher than that in the underlayer. The areal arrange order of the sediments chlorophyll α concentration is the Chukchi Sea 〉 the Slop-flow area 〉 the Mendeleev Ride, and chlorophyll α concentration can not be examined in the sediments of the Chukehi Plateau and the Canada Basin.

关 键 词：叶绿素α浓度 水体与沉积物 区域性 北冰洋 

分 类 号：Q945.11[生物学—植物学]