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Identification of biogeochemical provinces in the Southern Ocean: spatial modeling of biological, geochemical and sedimentological data

南大洋生物地球化学区的识别：生物、地球化学和沉积学数据的空间建模

基本信息

批准号：
219465809
负责人：
Dr. Kerstin Jerosch
金额：
--
依托单位：
Alfred-Wegener-Institut (AWI) Helmholtz-Zentrum für Polar- und Meeresforschung
依托单位国家：
德国
项目类别：
Infrastructure Priority Programmes
财政年份：
2012
资助国家：
德国
起止时间：
2011-12-31 至 2016-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/219465809?language=en
关键词：
Identification biogeochemical provinces Southern Ocean

项目摘要

Compared to biogenic silica, little is known about benthic particulate organic carbon fluxes in situ in the Southern Ocean, a key region for the global marine carbon cycle. Because of the lack of data, the Southern Ocean south of 60° is still excluded from the global carbon budget calculations. Our knowledge of rates and spatio-temporal variability is patchy, therefore coupling of these processes into regional or global models remains difficult and error prone. Meanwhile the public availability and dissemination of biological, geochemical and sedimentological research data as well as multivariate analysis methods applied in marine sciences is undergoing major developments, towards improving interdisciplinary data analysis. This proposal aims to model benthic particulate organic carbon fluxes and to use correlated parameters as biogenic silica, benthic organisms and other environmental parameters, that mimic the geochemical situation as proxies. Biogeochemical provinces in the Southern Ocean combining in situ measurements, experiments and multivariate models, will indicate areas of defined oxygen and carbon fluxes by GIS-based statistical modeling methodology. These provinces are also needed to quantify potential species occurrence and biomass and can be used to optimize sampling strategies during scientific expeditions. The spatial distribution and the dimensions of the Southern Ocean provinces will reduce the gap of knowledge regarding the global geochemical cycles. Furthermore, the exploration of the spatial variation regarding the location and extent of the provinces which are to be expected due to global warming contribute to the prediction of quantitative changes in geochemical fluxes in the Southern Ocean.

与生物二氧化硅相比，人们对南大洋（全球海洋碳循环的关键区域）原位底栖颗粒有机碳通量知之甚少。由于缺乏数据，60°以南的南大洋仍被排除在全球碳预算计算之外。我们对比率和时空变异性的了解并不完整，因此将这些过程耦合到区域或全球模型中仍然很困难且容易出错。与此同时，生物、地球化学和沉积学研究数据的公开获取和传播以及海洋科学中应用的多元分析方法正在发生重大发展，以改善跨学科数据分析。该提案旨在模拟海底颗粒有机碳通量，并使用相关参数作为生物二氧化硅、海底生物和其他环境参数，模拟地球化学情况作为代理。南大洋的生物地球化学省份结合原位测量、实验和多元模型，将通过基于 GIS 的统计建模方法来指示确定的氧和碳通量区域。这些省份还需要量化潜在物种的出现和生物量，并可用于优化科学考察期间的采样策略。南大洋省份的空间分布和规模将缩小有关全球地球化学循环的知识差距。此外，探索由于全球变暖而预计发生的省份位置和范围的空间变化有助于预测南大洋地球化学通量的数量变化。