Atmospheric pathways of chlorinated pesticides and natural bromoanisoles in the northern Baltic Sea and its catchment

Bidleman, Terry and Agosta, Kathleen and Andersson, Agneta and Brorström-Lundén, Eva and Haglund, Peter and Hansson, Katarina and Laudon, Hjalmar and Newton, Seth and Nygren, Olle and Ripszam, Matyas and Tysklind, Mats and Wiberg, Karin (2015) Atmospheric pathways of chlorinated pesticides and natural bromoanisoles in the northern Baltic Sea and its catchment. Ambio, 44 (3). pp. 472-483. ISSN 1654-7209

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Official URL: http://dx.doi.org/10.1007/s13280-015-0666-4

Abstract

Long-range atmospheric transport is a major pathway for delivering persistent organic pollutants to the oceans. Atmospheric deposition and volatilization of chlorinated pesticides and algae-produced bromoanisoles (BAs) were estimated for Bothnian Bay, northern Baltic Sea, based on air and water concentrations measured in 2011–2012. Pesticide fluxes were estimated using monthly air and water temperatures and assuming 4 months ice cover when no exchange occurs. Fluxes were predicted to increase by about 50 % under a 2069–2099 prediction scenario of higher temperatures and no ice. Total atmospheric loadings to Bothnian Bay and its catchment were derived from air–sea gas exchange and “bulk” (precipitation + dry particle) deposition, resulting in net gains of 53 and 46 kg year−1 for endosulfans and hexachlorocyclohexanes, respectively, and net loss of 10 kg year−1 for chlordanes. Volatilization of BAs releases bromine to the atmosphere and may limit their residence time in Bothnian Bay. This initial study provides baseline information for future investigations of climate change on biogeochemical cycles in the northern Baltic Sea and its catchment.

Item Type: Article
Language: English
Future Forest Subject: Skogsbruk i klimatförändringens tid > Natur
Skogsbruk i klimatförändringens tid > Osäkerhet och risk
Depositing User: Christer Enkvist
Date Deposited: 28 Feb 2017 14:28
Last Modified: 28 Feb 2017 14:28
URI: https://ffpdb.slu.se/id/eprint/4033

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