气候变化领域集成服务门户(CCPortal): Organic temperature proxies in the subpolat region around Iceland

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.855761
	Organic temperature proxies in the subpolat region around Iceland
	Rodrigo-Gámiz; Marta; Rampen; Sebastiaan W; de Haas; Henk; Baas; Marianne; Schouten; Stefan; Sinninghe Damsté; Jaap S
发布日期	2015-12-11
数据集类型	dataset
英文简介	Subpolar regions are key areas to study natural climate variability, due to their high sensitivity to rapid environmental changes, particularly through sea surface temperature (SST) variations. Here, we have tested three independent organic temperature proxies (UK'37, TEX86 and LDI) on their potential applicability for SST reconstruction in the subpolar region around Iceland. UK'37, TEX86 and TEXL86 temperature estimates from suspended particulate matter showed a substantial discrepancy with instrumental data, while long chain alkyl diols were below detection limit in most of the stations. In the northern Iceland Basin, sedimenting particles revealed a seasonality in lipid fluxes i.e. high fluxes of alkenones and GDGTs were measured during late spring-summer, and high fluxes of long chain alkyl diols during late summer. The flux-weighted average temperature estimates had a significant negative (ca. 2.3°C for UK'37) and positive (up to 5°C for TEX86) offset with satellite-derived SSTs and temperature estimates derived from the underlying surface sediment. UK'37 temperature estimates from surface sediments around Iceland correlate well with summer mean sea surface temperatures, while TEX86 derived temperatures correspond with both annual and winter mean 0-200 m temperatures, suggesting a subsurface temperature signal. Anomalous LDI-SST values in surface sediments, and low mass flux of 1,13- and 1,15-diols compared to 1,14-diols, suggest that Proboscia diatoms are the major sources of long chain alkyl diols in this area rather than eustigmatophyte algae, and therefore the LDI cannot be applied in this region.
空间范围	Median Latitude: 63.479066 * Median Longitude: -17.603462 * South-bound Latitude: 61.498550 * West-bound Longitude: -24.179900 * North-bound Latitude: 67.501630 * East-bound Longitude: -12.207870
时间范围	2011-07-11T11:04:04 - 2012-07-26T00:00:00
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/215425
推荐引用方式 GB/T 7714	Rodrigo-Gámiz,Marta,Rampen,et al. Organic temperature proxies in the subpolat region around Iceland.2015-12-11.https://doi.org/10.1594/PANGAEA.855761.