Global S&T Development Trend Analysis Platform of Resources and Environment
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. |
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