南大洋扇区夏季表层海水叶绿素a分布特征及其原因分析  

Circumpolar Spatial Distribution and Causes of Chlorophyll a in Surface Seawater of the Southern Ocean in Summer

作　　者：廖静思 陆志波[1,3,2] 王娟[1] 李慧蓉 张洁[4] 王硕仁[4] LIAO Jing-si;LU Zhi-bo;WANG Juan;LI Hui-rong;ZHANG Jie;WANG Shuo-ren(Tongji University,College of Environmental Science & Engineering,Shanghai 200092,China;State Key Laboratory of Pollution Control & Resource Reuse Research,Shanghai200092,China;UN Environment-Tongji Institute of Environment for Sustatinable Development,Shanghai 200092,China;Polar Research Institute of China,Shanghai 200136,China)

机构地区：[1]同济大学环境科学与工程学院,上海200092 [2]联合国环境署-同济大学环境与可持续发展学院,上海200092 [3]同济大学污染控制与资源化国家重点实验室,上海200092 [4]中国极地研究中心,上海200136

出　　处：《四川环境》2019年第1期105-115,共11页Sichuan Environment

摘　　要：研究利用第30次(2013～2014年)南极科学考察所获得的南大洋表层海水叶绿素a、温度以及盐度数据进行分析。结果显示,某些特殊海域如大陆架、岛屿附近海域,或当某一海域存在一些特殊的变化,如海冰融化,海洋锋,底部上升流时,会为浮游植物的生长提供有利条件,进而能够引发浮游植物叶绿素爆发。而在南大洋的5大海域中,罗斯海的叶绿素水平最高,其平均浓度能够达到1.735 mg/m^3。通过一些数据分析我们也发现在南半球夏季,对于浮游植物生长来说,温度水平和光照水平都是很充足的,而限制因素主要是营养物质的缺乏。而高纬度海区浮游植物生长速率对全球气候变暖非常敏感,因此对于浮游植物叶绿素爆发的原因探究也对全球碳循环以及气候变化起着重要作用,同时为后续研究提供数据资源。In this study,chlorophyll a,temperature and salinity data of surface seawater in the southern ocean obtained from the 30th(2013~2014)Antarctic scientific expedition were used for analysis.The results showed that some special sea areas,such as the sea area near the continental shelf and islands,or when there are some special changes in some sea areas,such as sea ice melting,ocean front,bottom upwelling,will provide favorable conditions for the growth of phytoplankton,and then can trigger the phytoplankton chlorophyll explosion.In the five great seas of the southern ocean,the Ross Sea has the highest chlorophyll level,and its average concentration can reach 1.735 mg m^-3.Through data analysis,it is found that the temperature level and light level are sufficient for phytoplankton growth in the Southern Hemisphere in summer and the limiting factors are nutrient deficiency.The growth rate of phytoplankton in high latitudes is very sensitive to global warming.Therefore,the exploration of phytoplankton chlorophyll outbreaks plays an important role in the global carbon cycle and climate change,also provides data resources for subsequent research.

关 键 词：南大洋 叶绿素A 浮游植物爆发 全球变暖 

分 类 号：X55[环境科学与工程—环境工程]