Iron study during a time series in the western Weddell pack ice
Iron study during a time series in the western Weddell pack ice
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DOI：
10.1016/j.marchem.2007.10.006
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发表时间：
2008
期刊：
影响因子：
3
通讯作者：
D. Lannuzel;V. Schoemann;J. Jong;L. Chou;B. Delille;S. Becquevort;J. Tison
中科院分区：
文献类型：
--
作者：
D. Lannuzel;V. Schoemann;J. Jong;L. Chou;B. Delille;S. Becquevort;J. Tison
2004年11月至2005年1月，在ISPOL漂流站（冰站北极星，68°S/55°W）的西部威德尔浮冰上采集了海冰、雪、盐水和下层海水样本。在时间序列中，每5天测定海冰环境中总可溶性、溶解性和颗粒性铁浓度，以及相关的物理、化学和生物参数。从11月29日至12月30日，观测到所有形式的铁都有所减少，这可能是夏季来临时冰渗透性增强的结果。在时间序列开始时，上层冰层的融化与盐水的排出过程同时发生。这将使铁从冰基质向下面的上层水柱播种成为可能。其中70%的铁是在调查的前10天内供应的，当时冰盖仍然存在。采样区通量估算进一步强调了浮冰在威德尔海西部铁生物地球化学循环中的相关作用。
Samples of sea ice, snow, brine and underlying seawater were collected in the western Weddell pack ice at the ISPOL drifting station (Ice Station POLarstern, 68°S/55°W) in spring–summer period (November 2004–January 2005). Total-dissolvable, dissolved and particulate Fe concentrations in the sea ice environment were determined every 5 days during the time series, together with relevant physical, chemical and biological parameters. From 29 November to 30 December, a decrease in all forms of Fe measured was observed, likely to be the result of enhanced ice permeability as summer proceeds. At the beginning of the time series, melting of the upper ice layer took place together with brine drainage process. This would enable the seeding of Fe from the ice matrix towards the upper water column below. 70% of this Fe was supplied during the first 10 days of the survey, while the ice cover is still present. Flux estimates from the sampled area furthermore highlight the relevant role of the pack ice in the biogeochemical cycle of Fe in the western Weddell Sea.