气候变化领域集成服务门户(CCPortal): Long chain diols in settling particles in tropical oceans: insights into sources, seasonality and proxies

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.898278
	Long chain diols in settling particles in tropical oceans: insights into sources, seasonality and proxies
	de Bar; Marijke W; Ullgren; Jenny; Thunell; Robert C; Wakeham; Stuart G; Brummer; Geert-Jan A; Stuut; Jan-Berend W; Sinninghe Damsté; Jaap S; Schouten; Stefan
发布日期	2019-02-11
数据集类型	dataset
英文简介	In this study we have analyzed sediment trap time series from five tropical sites to assess seasonal variations in concentrations and fluxes of long-chain diols (LCDs) and associated proxies with emphasis on the Long chain Diol Index (LDI). For the tropical Atlantic, we observe that generally less than 2 % of LCDs settling from the water column are preserved in the sediment. The Atlantic and Mozambique Channel traps reveal minimal seasonal variations in the LDI, similar to the TEX86 and UK'37. However, annual mean LDI-derived temperatures are in good agreement with the annual mean satellite-derived sea surface temperatures (SSTs). In the Cariaco Basin the LDI shows larger seasonal variation, as do the TEX86 and UK'37. Here, the LDI underestimates SST during the warmest months, which is likely due to summer stratification and the habitat depth of the diol producers deepening to around 20 to 30 m. Surface sediment LDI temperatures in the Atlantic and Mozambique Channel compare well with the average LDI-derived temperatures from the overlying sediment traps, as well as with decadal annual mean SST. Lastly, we observed large seasonal variations in the Diol Index, as indicator of upwelling conditions, at three sites, potentially linked to Guinea Dome upwelling (Eastern Atlantic), seasonal upwelling (Cariaco Basin) and seasonal upwelling and/or eddy migration (Mozambique Channel).
空间范围	Median Latitude: 8.127819 * Median Longitude: -29.230298 * South-bound Latitude: -16.800000 * West-bound Longitude: -64.670000 * North-bound Latitude: 13.810000 * East-bound Longitude: 40.800000
时间范围	1999-05-13T00:00:00 - 2013-11-20T06:41:00
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/215178
推荐引用方式 GB/T 7714	de Bar,Marijke W,Ullgren,et al. Long chain diols in settling particles in tropical oceans: insights into sources, seasonality and proxies.2019-02-11.https://doi.org/10.1594/PANGAEA.898278.