Carbon and nutrient cycling in Antarctic landfast sea ice from winter to summer
Carbon and nutrient cycling in Antarctic landfast sea ice from winter to summer
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从冬季到夏季南极陆地海冰的碳和营养物循环
DOI：
10.1002/lno.12260
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发表时间：
2022
影响因子：
4.5
通讯作者：
Jones E
中科院分区：
文献类型：
--
作者：
Jones E
2014-2015年冬、春、夏三季对西南极半岛阿德莱德岛Hangar Cove固陆海冰中碳、碱度和营养盐的季节性循环进行了研究。海冰物理化学条件、冰藻群落组成和有机质生产的变化驱动了时间动态。冬季海冰富含溶解无机碳（DIC）和无机营养盐的有机质矿化。碱度（Alk）和DIC的变化表明，非生物碳酸钙（ikaite）沉淀已经发生。相对于其他营养素，低磷酸盐（PO 4）浓度可能是由与伊卡特的共沉淀造成的。海水泛滥和融水引起的物理和地球化学性质的变化，在上层冰在春季营养补给支持附着植物的生产力和增加颗粒有机碳（POC）的间隙层。在夏季，硝酸盐（NO3）和DIC（< 165μmol kg−1）的快速吸收伴随着藻类生物量（746μg叶绿素L −1）和POC（6191μmol L−1）的大量积累。硅酸下降后，NO3耗尽约1个月，转向硅藻为主的社区。在夏季，PO 4在下层冰层中的积累可能是由于在生物膜存在下，ikaite溶解过程中释放的PO 4。Alk增加：较低的冰和冰下水中的DIC比率表明，ikaite溶解缓冲了融水稀释，并提高了大气CO2吸收的可能性。这项研究揭示了固陆海冰中碳和养分循环的强烈季节性，并显示了海冰在南极洲周围季节性冰层覆盖的沃茨的地球化学循环中的重要性。
Seasonal cycling in carbon, alkalinity, and nutrients in landfast sea ice in Hangar Cove, Adelaide Island, West Antarctic Peninsula, were investigated during winter, spring, and summer 2014–2015. Temporal dynamics were driven by changes in the sea‐ice physicochemical conditions, ice‐algal community composition, and organic matter production. Winter sea ice was enriched with dissolved inorganic carbon (DIC) and inorganic nutrients from organic matter remineralization. Variations in alkalinity (Alk) and DIC indicated that abiotic calcium carbonate (ikaite) precipitation had taken place. Relative to other nutrients, low phosphate (PO4) concentrations potentially resulted from co‐precipitation with ikaite. Seawater flooding and meltwater induced variability in the physical and biogeochemical properties in the upper ice in spring where nutrient resupply supported haptophyte productivity and increased particulate organic carbon (POC) in the interstitial layer. Rapid nitrate (NO3) and DIC (< 165μmol kg−1) uptake occurred alongside substantial build‐up of algal biomass (746μg chlorophyllaL−1) and POC (6191μmol L−1) during summer. Silicic acid drawdown followed NO3depletion by approximately 1 month with a shift to diatom‐dominated communities. Accumulation of PO4in the lower ice layers in summer likely resulted from PO4released during ikaite dissolution in the presence of biofilms. Increased Alk : DIC ratios in the lower ice and under‐ice water suggested that ikaite dissolution buffered against meltwater dilution and enhanced the potential for atmospheric CO2uptake. This study revealed strong seasonality in carbon and nutrient cycling in landfast sea ice and showed the importance of sea ice in biogeochemical cycling in seasonally ice‐covered waters around Antarctica.
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南极洲玛格丽特湾冬季海冰特性
DOI：
10.1016/j.dsr2.2004.07.024
发表时间：
2004
影响因子：
3
作者：
D. Perovich;B. Elder;K. Claffey;S. Stammerjohn;Raymond C. Smith;S. Ackley;H. Krouse;A. Gow
通讯作者：
A. Gow
DOI：
--
发表时间：
2022
期刊：
Elementa: Science of the Anthropocene
影响因子：
--
作者：
M. V. van Leeuwe;M. Fenton;Emily Davey;Janne;E. Jones;M. Meredith;J. Stefels
通讯作者：
J. Stefels
南极海冰（别林斯高晋海）外聚合物颗粒的丰度、尺寸分布和细菌定植
影响因子：
1.4
作者：
K. Meiners;R. Brinkmeyer;M. Granskog;A. Lindfors
通讯作者：
A. Lindfors
南大洋斯科舍海从海冰边缘到岛屿水华的二氧化碳季节性循环
影响因子：
3
作者：
E. Jones;D. Bakker;H. Venables;N. Hardman
通讯作者：
N. Hardman
影响因子：
4.1
作者：
Henley, Sian F.;Schofield, Oscar M.;Meredith, Michael P.
通讯作者：
Meredith, Michael P.