Publication details
The impact of organochlorines cycling in the cryosphere on their global distributions and fate – 2. Land ice and temporary snow cover
| Authors | |
|---|---|
| Year of publication | 2012 |
| Type | Article in Periodical |
| Magazine / Source | Environmental Pollution |
| MU Faculty or unit | |
| Citation | |
| Doi | http://dx.doi.org/10.1016/j.envpol.2011.10.004 |
| Field | Air pollution and control |
| Keywords | Persistent organic pollutants |
| Description | Global fate and transport of gamma-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% gamma-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, tau(ov), of gamma-HCH and overestimate Toy 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 gamma-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. |