气候变化领域集成服务门户(CCPortal): Physical properties and hexachlorocyclohexane concentrations of sea-ice, water and ice algae samples, eastern Beaufort Sea

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.818528
	Physical properties and hexachlorocyclohexane concentrations of sea-ice, water and ice algae samples, eastern Beaufort Sea
	Pućko; Monika; Stern; Gary A; Barber; David G; Macdonald; Robie W; Rosenberg; B
发布日期	2010-08-27
数据集类型	dataset
英文简介	We present evidence that both geophysical and thermodynamic conditions in sea ice are important in understanding pathways of accumulation or rejection of hexachlorocyclohexanes (HCHs). a- and g-HCH concentrations and a-HCH enantiomer fractions have been measured in various ice classes and ages from the Canadian High Arctic. Mean a-HCH concentrations reached 0.642 ± 0.046 ng/L in new and young ice (<30 cm), 0.261 ±0.015 ng/L in the first-year ice (30-200 cm) and 0.208 ±0.045 in the old ice (>200 cm). Mean g-HCH concentrations were 0.066 ± 0.006 ng/L in new and young ice, 0.040 ±0.002 ng/L in the first-year ice and 0.040 ±0.007 ng/L in the old ice. In general, a-HCH concentrations and vertical distributions were highly dependent on the initial entrapment of brine and the subsequent desalination process. g-HCH levels and distribution in sea ice were not as clearly related to ice formation processes. During the year, first-year ice progressed from freezing (accumulation) to melting (ablation). Relations between the geophysical state of the sea ice and the vertical distribution of HCHs are described as ice passes through these thermodynamic states. In melting ice, which corresponded to the algal bloom period, the influence of biological processes within the bottom part of the ice on HCH concentrations and a-HCH enantiomer fraction is discussed using both univariate and multivariate approaches.
空间范围	Median Latitude: 71.332303 * Median Longitude: -125.963931 * South-bound Latitude: 69.499000 * West-bound Longitude: -130.768000 * North-bound Latitude: 73.729000 * East-bound Longitude: -120.394000
时间范围	2007-10-26T00:00:00 - 2008-05-25T00:00:00
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/219983
推荐引用方式 GB/T 7714	Pućko,Monika,Stern,et al. Physical properties and hexachlorocyclohexane concentrations of sea-ice, water and ice algae samples, eastern Beaufort Sea.2010-08-27.https://doi.org/10.1594/PANGAEA.818528.