气候变化领域集成服务门户(CCPortal): Solar radiation over and under sea ice and photographic quantification of Ice algal aggregates during the POLARSTERN cruise ARK-XXVII/3 (IceArc) in summer 2012

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.833292
	Solar radiation over and under sea ice and photographic quantification of Ice algal aggregates during the POLARSTERN cruise ARK-XXVII/3 (IceArc) in summer 2012
	Katlein; Christian; Fernández-Méndez; Mar; Wenzhöfer; Frank; Nicolaus; Marcel
发布日期	2014-06-10
数据集类型	dataset
英文简介	The ice cover of the Arctic Ocean has been changing dramatically in the last decades and the consequences for the sea-ice associated ecosystem remain difficult to assess. Algal aggregates underneath sea ice have been described sporadically but the frequency and distribution of their occurrence is not well quantified. We used upward looking images obtained by a remotely operated vehicle (ROV) to derive estimates of ice algal aggregate biomass and to investigate their spatial distribution. During the IceArc expedition (ARK-XXVII/3) of RV Polarstern in late summer 2012, different types of algal aggregates were observed floating underneath various ice types in the Central Arctic basins. Our results show that the floe scale distribution of algal aggregates in late summer is very patchy and determined by the topography of the ice underside, with aggregates collecting in dome shaped structures and at the edges of pressure ridges. The buoyancy of the aggregates was also evident from analysis of the aggregate size distribution. Different approaches used to estimate aggregate biomass yield a wide range of results. This highlights that special care must be taken when upscaling observations and comparing results from surveys conducted using different methods or on different spatial scales.
空间范围	Median Latitude: 84.881542 * Median Longitude: 75.932969 * South-bound Latitude: 81.884667 * West-bound Longitude: 17.453670 * North-bound Latitude: 88.827670 * East-bound Longitude: 131.128670
时间范围	2012-08-09T08:08:00 - 2012-09-29T15:10:00
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/215502
推荐引用方式 GB/T 7714	Katlein,Christian,Fernández-Méndez,et al. Solar radiation over and under sea ice and photographic quantification of Ice algal aggregates during the POLARSTERN cruise ARK-XXVII/3 (IceArc) in summer 2012.2014-06-10.https://doi.org/10.1594/PANGAEA.833292.