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| Reference : Long-term biogeochemical impacts of liming the ocean |
| Scientific congresses and symposiums : Unpublished conference | |||
| Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography | |||
| http://hdl.handle.net/2268/133304 | |||
| Long-term biogeochemical impacts of liming the ocean | |
| English | |
| Ilyina, Tatiana [Max-Planck-Institute for Meteorology, Hamburg, Germany > > > >] | |
| Wolf-Gladrow, Dieter [Alfred-Wegener-Institute, Bremerhaven, Germany > > > >] | |
Munhoven, Guy  [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP) >] | |
| Heinze, Christoph [University of Bergen, Geophysical Institute, Bjerknes Centre for Climate Research, Bergen, Norway > > > >] | |
| 8-Dec-2011 | |
| Abstract #OS43E-08 | |
| No | |
| International | |
| AGU Fall Meeting | |
| from 05-12-2011 to 09-12-2011 | |
| American Geophysical Union | |
| San Francisco | |
| CA | |
| [en] Ocean Acidification ; Carbon Cycle ; CO2 | |
| [en] Fossil fuel CO2 emissions result in large-scale long-term
perturbations in seawater chemistry. Oceans take up atmospheric CO2, and several geo-engineering approaches have been suggested to mitigate impacts of CO2 emissions and resulting ocean acidification that are based on this property. One of them is to enhance weathering processes to remove atmospheric CO2. This method involves dissolving rocks (i.e. limestone) or adding strong bases (i.e. calcium hydroxide) in the upper ocean and is termed as liming the oceans. The net effect of this approach is to increase ocean alkalinity, thereby increasing the oceanic capacity to store anthropogenic CO2. Another effect of adding alkalinity would be to drive seawater to higher pH values and thus counteract the ongoing ocean acidification. However, whereas adding bases only alter alkalinity of seawater, dissolution of carbonates perturb both, alkalinity and dissolved inorganic carbon budgets. Thus, on longer time scales, these two methods will likely have different biogeochemical effects in the ocean. Here we test enduring implications of the two approaches for marine carbon cycle using the global ocean biogeochemical model HAMOCC. In our model scenarios we add alkalinity in the amounts proportional to fossil fuel emissions. We compare the longterm effectiveness of the two geo-engineering approaches to decrease atmospheric CO2. | |
| Researchers ; Professionals ; Students | |
| http://hdl.handle.net/2268/133304 | |
| http://adsabs.harvard.edu/abs/2011AGUFMOS43E..08I |
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