Effects of ice-associated stressors and pollutants on the Arctic marine cryosphere

GSTDTAP

项目编号	NE/R012857/1
	Effects of ice-associated stressors and pollutants on the Arctic marine cryosphere
	Crispin Halsall
主持机构	Lancaster University
项目开始年	2018
	2018-07-01
项目结束日期	2021-06-30
资助机构	UK-NERC
项目类别	Research Grant
项目经费	347409(GBP)
国家	英国
语种	英语
英文摘要	An array of persistent chemical pollutants are present in the Arctic in both biota and abiotic compartments, including snow and ice. These chemicals include older legacy contaminants such as PCBs and DDT, well as an array of newer 'emerging' contaminants with contrasting physical-chemical properties. Rapid changes to the physical and biological environment in the Arctic are changing the pathways and fate of pollutants, making biological exposure and impact difficult to predict; indeed changes to the Arctic may be altering the biological exposure to contaminants and even exacerbating it. The purpose of this proposal is to provide a mechanistic and quantitative understanding on the role of sea ice (particularly first year sea ice - the dominant ice type in a warmer Arctic) in the accumulation and subsequent release of chemical contaminants to the base of the marine foodweb. Preliminary evidence indicates that some newer contaminants are present in sea ice at concentrations akin to temperate coastal seas and we need to know the reasons for this, plus the likely exposure to biota once contaminants are released during ice break up and melt at the end of winter. Elucidating this process and understanding the fate and behaviour of chemicals in marine ice and snow can help shape chemical management strategies at the global level, particularly if changes to the Arctic cryosphere are also altering nutirent availability in ice and surrounding seawater. The contaminant and nutrient processes to be observed in the Arctic will be supported by artificial sea ice experiments. We plan to investigate this topic using field and laboratory studies and use these to model effects on the lower marine foodweb, examining whether nutrient and contaminant availability are linked and their impact on sea ice habitat functioning.
来源学科分类	Natural Environment Research
文献类型	项目
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/87161
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	Crispin Halsall.Effects of ice-associated stressors and pollutants on the Arctic marine cryosphere.2018.