| LI Zhijun,LI Runling,WANG Zipan,HAAS Christian,DIECKMANN Gerhard. 2016. Upper limits for chlorophyll a changes with brine volume in sea ice during the austral spring in the Weddell Sea, Antarctica. Acta Oceanologica Sinica, 35(2):68－75 |
| Upper limits for chlorophyll a changes with brine volume in sea ice during the austral spring in the Weddell Sea, Antarctica |
| 南极威德尔海春季海冰物理结构对叶绿素上限含量的影响 |
| Received:July 01, 2015 Revised:August 31, 2015 |
| DOI：10.1007/s13131-015-0740-6 |
| Key words:Antarctic brine volume chlorophyll a ice crystal mode sea ice |
| 中文关键词: 南极 卤水体积 叶绿素a 晶体结构 模式 海冰 |
| 基金项目: |
| Author Name | Affiliation | E-mail | | LI Zhijun | State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China | lizhijun@dlut.edu.cn | | LI Runling | State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China | | | WANG Zipan | Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China | | | HAAS Christian | Department of Earth and Space Science and Engineering, York University, Toronto M3J1P3, Canada | | | DIECKMANN Gerhard | Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven D-27570, Germany | |
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| Abstract: |
| During the winter and spring of 2006, we investigated the sea ice physics and marine biology in the northwest Weddell Sea, Antarctica aboard R/V Polarstern. We determined the texture of each ice core and 71 ice crystal thin sections from 27 ice cores. We analyzed 393 ice cores, their temperatures, 348 block density and salinity samples, and 311 chlorophyll a (Chl a) and phaeophytin samples along the cruise route during the investigation. Based on the vertical distributions of 302 groups of data for the ice porosity and Chl a content in the ice at the same position, we obtained new evidence that ice physical parameters influence the Chl a content in ice. We collected snow and ice thickness data, and established the effects of the snow and ice thickness on the Chl a blooms under the ice, as well as the relationships between the activity of ice algae cells and the brine volume in ice according to the principle of environmental control of the ecological balance. We determined the upper limits for Chl a in the brine volume of granular and columnar ice in the Antarctica, thereby demonstrating the effects of ice crystals on brine drainage, and the contributions of the physical properties of sea ice to Chl a blooms near the ice bottom and on the ice-water interface in the austral spring. Moreover, we found that the physical properties of sea ice affect ice algae and they are key control elements that modulate marine phytoplankton blooms in the ice-covered waters around Antarctica. |
| 中文摘要: |
| 2006年冬末春初,在德国POLARSTERN科学考察船执行南极威德尔海西北海域考察期间,调查了考察区海冰物理和海洋生物。本文观测了航线上钻取的27支海冰冰芯的组构和71个冰晶体薄片;分析得到393组冰温数据;348组盐度、密度数据和311组叶绿素a和脱镁叶绿素含量数据;通过302组冰内相同深度孔隙率和叶绿素a含量数据分析,发现海冰物理参数影响冰内叶绿素a含量的新证据;利用收集的雪、冰厚度数据以及环境容量制约生态平衡的规律,建立了雪、冰厚度对冰底叶绿素繁荣的影响以及;确立了南极粒状冰和柱状冰内叶绿素a上限含量同卤水体积的关系。从而表达了冰晶体对卤水排泄的效应和冰物理性质对南极春季冰底和冰-水界面叶绿素a增长的贡献。此外,还得出海冰物理性质影响冰藻,并且是南极冰区水体浮游植物繁荣的关键控制因素。 |
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