Impact of climate change on mercury concentrations and deposition in the eastern United States.
Identifieur interne : 002847 ( Main/Exploration ); précédent : 002846; suivant : 002848Impact of climate change on mercury concentrations and deposition in the eastern United States.
Auteurs : Athanasios G. Megaritis [Grèce] ; Benjamin N. Murphy [Suède] ; Pavan N. Racherla [États-Unis] ; Peter J. Adams [États-Unis] ; Spyros N. Pandis [États-Unis]Source :
- The Science of the total environment [ 1879-1026 ] ; 2014.
Descripteurs français
- KwdFr :
- MESH :
- Wicri :
- geographic : États-Unis.
English descriptors
- KwdEn :
- MESH :
- chemical , analysis : Air Pollutants, Mercury.
- geographic : United States.
- statistics & numerical data : Air Pollution.
- Climate, Climate Change, Environmental Monitoring, Seasons.
Abstract
The global-regional climate-air pollution modeling system (GRE-CAPS) was applied over the eastern United States to study the impact of climate change on the concentration and deposition of atmospheric mercury. Summer and winter periods (300 days for each) were simulated, and the present-day model predictions (2000s) were compared to the future ones (2050s) assuming constant emissions. Climate change affects Hg(2+) concentrations in both periods. On average, atmospheric Hg(2+) levels are predicted to increase in the future by 3% in summer and 5% in winter respectively due to enhanced oxidation of Hg(0) under higher temperatures. The predicted concentration change of Hg(2+) was found to vary significantly in space due to regional-scale changes in precipitation, ranging from -30% to 30% during summer and -20% to 40% during winter. Particulate mercury, Hg(p) has a similar spatial response to climate change as Hg(2+), while Hg(0) levels are not predicted to change significantly. In both periods, the response of mercury deposition to climate change varies spatially with an average predicted increase of 6% during summer and 4% during winter. During summer, deposition increases are predicted mostly in the western parts of the domain while mercury deposition is predicted to decrease in the Northeast and also in many areas in the Midwest and Southeast. During winter mercury deposition is predicted to change from -30% to 50% mainly due to the changes in rainfall and the corresponding changes in wet deposition.
DOI: 10.1016/j.scitotenv.2014.03.084
PubMed: 24793327
Affiliations:
- Grèce, Suède, États-Unis
- Pennsylvanie, Svealand, État de New York
- New York, Pittsburgh, Stockholm
- Université Carnegie-Mellon, Université Columbia, Université de Stockholm
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Megaritis</name><affiliation wicri:level="1"><nlm:affiliation>Department of Chemical Engineering, University of Patras, 26500 Patras, Greece; Institute of Chemical Engineering Sciences, Foundation for Research and Technology Hellas (ICEHT/FORTH), 26504 Patras, Greece.</nlm:affiliation><country xml:lang="fr">Grèce</country><wicri:regionArea>Department of Chemical Engineering, University of Patras, 26500 Patras, Greece; Institute of Chemical Engineering Sciences, Foundation for Research and Technology Hellas (ICEHT/FORTH), 26504 Patras</wicri:regionArea><wicri:noRegion>26504 Patras</wicri:noRegion></affiliation></author><author><name sortKey="Murphy, Benjamin N" sort="Murphy, Benjamin N" uniqKey="Murphy B" first="Benjamin N" last="Murphy">Benjamin N. 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Summer and winter periods (300 days for each) were simulated, and the present-day model predictions (2000s) were compared to the future ones (2050s) assuming constant emissions. Climate change affects Hg(2+) concentrations in both periods. On average, atmospheric Hg(2+) levels are predicted to increase in the future by 3% in summer and 5% in winter respectively due to enhanced oxidation of Hg(0) under higher temperatures. The predicted concentration change of Hg(2+) was found to vary significantly in space due to regional-scale changes in precipitation, ranging from -30% to 30% during summer and -20% to 40% during winter. Particulate mercury, Hg(p) has a similar spatial response to climate change as Hg(2+), while Hg(0) levels are not predicted to change significantly. In both periods, the response of mercury deposition to climate change varies spatially with an average predicted increase of 6% during summer and 4% during winter. During summer, deposition increases are predicted mostly in the western parts of the domain while mercury deposition is predicted to decrease in the Northeast and also in many areas in the Midwest and Southeast. During winter mercury deposition is predicted to change from -30% to 50% mainly due to the changes in rainfall and the corresponding changes in wet deposition.</div></front></TEI><affiliations><list><country><li>Grèce</li><li>Suède</li><li>États-Unis</li></country><region><li>Pennsylvanie</li><li>Svealand</li><li>État de New York</li></region><settlement><li>New York</li><li>Pittsburgh</li><li>Stockholm</li></settlement><orgName><li>Université Carnegie-Mellon</li><li>Université Columbia</li><li>Université de Stockholm</li></orgName></list><tree><country name="Grèce"><noRegion><name sortKey="Megaritis, Athanasios G" sort="Megaritis, Athanasios G" uniqKey="Megaritis A" first="Athanasios G" last="Megaritis">Athanasios G. Megaritis</name></noRegion></country><country name="Suède"><region name="Svealand"><name sortKey="Murphy, Benjamin N" sort="Murphy, Benjamin N" uniqKey="Murphy B" first="Benjamin N" last="Murphy">Benjamin N. Murphy</name></region></country><country name="États-Unis"><region name="État de New York"><name sortKey="Racherla, Pavan N" sort="Racherla, Pavan N" uniqKey="Racherla P" first="Pavan N" last="Racherla">Pavan N. Racherla</name></region><name sortKey="Adams, Peter J" sort="Adams, Peter J" uniqKey="Adams P" first="Peter J" last="Adams">Peter J. Adams</name><name sortKey="Pandis, Spyros N" sort="Pandis, Spyros N" uniqKey="Pandis S" first="Spyros N" last="Pandis">Spyros N. Pandis</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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