Biosedimentary systems in Arctic environments: Polar coralline algae

北极环境中的生物沉积系统：极地珊瑚藻

• 批准号: 68543914
• 负责人: Professor Dr. André Freiwald
• 金额: --
• 依托单位: Abteilung Meeresforschung
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2012-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/68543914?language=en
• 关键词: Biosedimentary; systems; Arctic; environments; Polar

In 2006, the northernmost coralline algal grounds were discovered at 80°30 N off Nordaustlandet during EPS Maria S. Merian Cruise 2/3. This site and several others around Svalbard were intensively documented and sampled with the manned submarine Jago. Polar coralline algae seem to be much more widespread in polar waters than previously thought, thus representing a unique polar carbonate factory. This proposal intends to (1) analyse the biotic assemblage and functioning of these poorly known biosedimentary system, (2) to testify the value of coralline algae to reconstruct historic environmental change (e.g., the ongoing Arctic wanning, is it true?) using dating and geochemical methods, and (3) to estimate a budget for photic polar carbonates. The Svalbardian coralline algal grounds will be compared with those from northern Norway, some 1000 km further south but still beyond the Polar Circle. This comparison helps to elucidate the influence of poleward increasing saisonality on calcifying organisms. From both areas (Norway and Svalbard) mid-Holocene rhodoliths are available and allows the analysis of palaeoclimatic studies, such as the amplitude of the Holocene climatic optimum with the present situation in a polar region.

2006 年，在 EPS Maria S. Merian Cruise 2/3 期间，在 Nordaustlandet 附近的北纬 80°30 处发现了最北端的珊瑚藻地，该地点和斯瓦尔巴群岛周围的其他几个地点都被载人潜水艇“Jago”号进行了深入记录和采样。在极地水域中的分布比之前想象的要广泛得多，因此代表了一个独特的极地碳酸盐工厂。该提案旨在（1）分析生物。这些鲜为人知的生物沉积系统的组合和功能，（2）使用年代测定和地球化学方法来证明珊瑚藻在重建历史环境变化（例如，持续的北极变暖，是真的吗？）方面的价值，以及（3）估计斯瓦尔巴群岛珊瑚藻地的预算将与挪威北部的珊瑚藻地进行比较，该地区向南约 1000 公里，但仍在极圈之外。阐明向极地增加的季节性对钙化生物的影响，从这两个地区（挪威和斯瓦尔巴群岛）都可以获得全新世中期的红石，并允许分析副气候研究，例如极地现状下全新世气候最适宜的幅度。地区。

项目成果

Arctic rhodolith beds and their environmental controls (Spitsbergen, Norway)

北极红榴石层及其环境控制（挪威斯匹次卑尔根岛）

• DOI: 10.1007/s10347-013-0372-2
• 发表时间: 2014
• 期刊: Facies
• 影响因子: 1.8
• 作者: Teichert S;Woelkerling W;Rüggeberg A;Wisshak M;Piepenburg D;Meyerhöfer M;Form A;Freiwald A
• 通讯作者: Freiwald A

Polar coralline algal CaCO 3 -production rates correspond to intensity and duration of the solar radiation

极地珊瑚藻 CaCO 3 - 生产率与太阳辐射的强度和持续时间相对应

• DOI: 10.5194/bg-11-833-2014
• 发表时间: 2013
• 期刊: Biogeosciences
• 影响因子: 4.9
• 作者: Teichert S;Freiwald A
• 通讯作者: Freiwald A