Organochlorine Pollutants within a Polythermal Glacier in the Interior Eastern Alaska Range
| Autor: | Karl J. Kreutz, Therese Anderson, Seth Campbell, B. Lewis Perkins, Steven Bernsen, T. Gatesman, Kimberley R. Miner, Anna Lilijedahl, Christopher Gerbi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
environmental_sciences
lcsh:Hydraulic engineering 010504 meteorology & atmospheric sciences Range (biology) Geography Planning and Development Climate change 030501 epidemiology Aquatic Science 01 natural sciences Biochemistry 03 medical and health sciences Human health lcsh:Water supply for domestic and industrial purposes Arctic Ice core lcsh:TC1-978 Organochlorine pollutants Glacial period Meltwater 0105 earth and related environmental sciences Water Science and Technology Pollutant lcsh:TD201-500 geography geography.geographical_feature_category Bedrock Glacier 6. Clean water persistent pollutants 13. Climate action Bioaccumulation Environmental science glaciers Physical geography 0305 other medical science |
| Zdroj: | Water Volume 10 Issue 9 Water, Vol 10, Iss 9, p 1157 (2018) |
| ISSN: | 2073-4441 |
| DOI: | 10.3390/w10091157 |
| Popis: | To assess the presence of organochlorine pollutants (OCP) in Alaskan sub-Arctic latitudes, we analyzed ice core and meltwater samples from Jarvis Glacier, a polythermal glacier in Interior Alaska. Jarvis Glacier is receding as atmospheric warming continues throughout the region, increasing opportunity for OCP transport both englacially and into the proglacial watershed. Across glacial meltwater and ice core samples, we utilize solid-phase extraction technology and identify the pesticides DDT, DDE and DDD, &alpha HCH and &gamma HCH. OCP concentrations in ice core samples were highest at the 7&ndash 14 m depth (0.51 ng/L of DDT) and decreased gradually approaching the bedrock at 79 m. Meltwater concentrations from the proglacial creek slightly exceeded concentrations found in the ice core, potentially indicating aggregate OCP glacial loss, with peak OCP concentration (1.12 ng/L of DDD) taken in July and possibly associated to peak melt. Ongoing use of DDT to fight malaria in Asia and the extended atmospheric range of HCH may account for concentrations in near-surface ice of this remote glacier, correlating with use and atmospheric transport. The opportunity for bioaccumulation of OCPs, in humans or animals, of glacially distributed pollutants may increase as glacial melt continues. |
| Databáze: | OpenAIRE |
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