气候变化领域集成服务门户(CCPortal): Acoustic multi-frequency indicator of four major groups on a spatial grid in the Bay of Biscay

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.833957
	Acoustic multi-frequency indicator of four major groups on a spatial grid in the Bay of Biscay
	Trenkel; Verena M; Berger; Laurent
发布日期	2014-07-11
数据集类型	dataset
英文简介	The first data set contains the mean and cofficient of variation (standard deviation divided by mean) of a multi-frequency indicator I derived from ER60 acoustic information collected at five frequencies (18, 38, 70, 120, and 200 kHz) in the Bay of Biscay in May of the years 2006, 2008, 2009 and 2010 (Pelgas surveys). The multi-frequency indicator was first calculated per voxel (20 m long × 5 m deep sampling unit) and then averaged on a spatial grid (approx. 20 nm × 20 nm) for five 5-m depth layers in the surface waters (10-15m, 15-20m, 20-25m, 25-30m below sea surface); there are missing values in particular in the shallowest layer. The second data set provides for each grid cell and depth layer the proportion of voxels for which the multi-frequency indicator I was indicative of a certain group of organisms. For this the following interpretation was used: I < 0.39 swim bladder fish or large gas bubbles, I = 0.39-0.58 small resonant bubbles present in gas bearing organisms such as larval fish and phytoplankton, I = 0.7-0.8 fluidlike zooplankton such as copepods and euphausiids, and I > 0.8 mackerel. These proportions can be interpreted as a relative abundance index for each of the four organism groups.
空间范围	Median Latitude: 45.977261 * Median Longitude: -3.546102 * South-bound Latitude: 43.600000 * West-bound Longitude: -5.900000 * North-bound Latitude: 48.200000 * East-bound Longitude: -1.100000
时间范围	2006-05-02T06:48:00 - 2010-05-24T17:59:00
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/215498
推荐引用方式 GB/T 7714	Trenkel,Verena M,Berger,et al. Acoustic multi-frequency indicator of four major groups on a spatial grid in the Bay of Biscay.2014-07-11.https://doi.org/10.1594/PANGAEA.833957.