气候变化领域集成服务门户(CCPortal): Global data compilation of benthic data sets II

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.733691
	Global data compilation of benthic data sets II
	Seiter; Katherina; Hensen; Christian; Zabel; Matthias
发布日期	2005-02-16
数据集类型	dataset
英文简介	In this study we present a global distribution pattern and budget of the minimum flux of particulate organic carbon to the sea floor (J POC alpha). The estimations are based on regionally specific correlations between the diffusive oxygen flux across the sediment-water interface, the total organic carbon content in surface sediments, and the oxygen concentration in bottom waters. For this, we modified the principal equation of Cai and Reimers [1995] as a basic monod reaction rate, applied within 11 regions where in situ measurements of diffusive oxygen uptake exist. By application of the resulting transfer functions to other regions with similar sedimentary conditions and areal interpolation, we calculated a minimum global budget of particulate organic carbon that actually reaches the sea floor of ~0.5 GtC yr-1 (>1000 m water depth (wd)), whereas approximately 0.002-0.12 GtC yr-1 is buried in the sediments (0.01-0.4% of surface primary production). Despite the fact that our global budget is in good agreement with previous studies, we found conspicuous differences among the distribution patterns of primary production, calculations based on particle trap collections of the POC flux, and J POC alpha of this study. These deviations, especially located at the southeastern and southwestern Atlantic Ocean, the Greenland and Norwegian Sea and the entire equatorial Pacific Ocean, strongly indicate a considerable influence of lateral particle transport on the vertical link between surface waters and underlying sediments. This observation is supported by sediment trap data. Furthermore, local differences in the availability and quality of the organic matter as well as different transport mechanisms through the water column are discussed.
空间范围	Median Latitude: 10.310874 * Median Longitude: 4.873745 * South-bound Latitude: -60.088830 * West-bound Longitude: -140.100000 * North-bound Latitude: 82.398333 * East-bound Longitude: 160.480000
时间范围	1959-03-30T00:00:00 - 1995-08-03T00:00:00
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/226936
推荐引用方式 GB/T 7714	Seiter,Katherina,Hensen,et al. Global data compilation of benthic data sets II.2005-02-16.https://doi.org/10.1594/PANGAEA.733691.