1. The impact of organochlorines cycling in the cryosphere on global distributions and fate--2. Land ice and temporary snow cover.
- Author
-
Hofmann L, Stemmler I, and Lammel G
- Subjects
- Arctic Regions, Models, Theoretical, Seawater analysis, Environmental Monitoring, Hydrocarbons, Chlorinated analysis, Ice analysis, Snow chemistry, Water Pollutants, Chemical analysis
- Abstract
Global fate and transport of γ-HCH and DDT was studied using a global multicompartment chemistry-transport model, MPI-MCTM, with and without inclusion of land ice (in Antarctica and Greenland) or snow cover (dynamic). MPI-MCTM is based on coupled ocean and atmosphere general circulation models. After a decade of simulation 4.2% γ-HCH and 2.3% DDT are stored in land ice and snow. Neglection of land ice and snow in modelling would underestimate the total environmental residence time, τ(ov), of γ-HCH and overestimate τ(ov) for DDT, both on the order of 1% and depending on actual compartmental distribution. Volatilisation of DDT from boreal, seasonally snow covered land is enhanced throughout the year, while volatilisation of γ-HCH is only enhanced during the snow-free season. Including land ice and snow cover in modelling matters in particular for the Arctic, where higher burdens are predicted to be stored., (Copyright © 2011 Elsevier Ltd. All rights reserved.)
- Published
- 2012
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