Show simple item record

dc.contributor.authorRothenberg, Daniel Alexander
dc.contributor.authorMahowald, N. M.
dc.contributor.authorLindsay, K.
dc.contributor.authorDoney, Scott C.
dc.contributor.authorMoore, J. K.
dc.contributor.authorThornton, P.
dc.date.accessioned2013-03-12T18:48:29Z
dc.date.available2013-03-12T18:48:29Z
dc.date.issued2012-10
dc.date.submitted2012-09
dc.identifier.issn2190-4987
dc.identifier.urihttp://hdl.handle.net/1721.1/77633
dc.description.abstractVolcanic eruptions induce a dynamical response in the climate system characterized by short-term global reductions in both surface temperature and precipitation, as well as a response in biogeochemistry. The available observations of these responses to volcanic eruptions, such as to Pinatubo, provide a valuable method to compare against model simulations. Here, the Community Climate System Model Version 3 (CCSM3) reproduces the physical climate response to volcanic eruptions in a realistic way, as compared to direct observations from the 1991 eruption of Mount Pinatubo. The model's biogeochemical response to eruptions is smaller in magnitude than observed, but because of the lack of observations, it is not clear why or where the modeled carbon response is not strong enough. Comparison to other models suggests that this model response is much weaker over tropical land; however, the precipitation response in other models is not accurate, suggesting that other models could be getting the right response for the wrong reason. The underestimated carbon response in the model compared to observations could also be due to the ash and lava input of biogeochemically important species to the ocean, which are not included in the simulation. A statistically significant reduction in the simulated carbon dioxide growth rate is seen at the 90% level in the average of 12 large eruptions over the period 1870–2000, and the net uptake of carbon is primarily concentrated in the tropics, with large spatial variability. In addition, a method for computing the volcanic response in model output without using a control ensemble is tested against a traditional methodology using two separate ensembles of runs; the method is found to produce similar results in the global average. These results suggest that not only is simulating volcanoes a good test of coupled carbon–climate models, but also that this test can be performed without a control simulation in cases where it is not practical to run separate ensembles with and without volcanic eruptions.en_US
dc.description.sponsorshipNASA Astrobiology Institute (NNGO6G127G)en_US
dc.description.sponsorshipNational Science Foundation (U.S.) (Grant 1049033)en_US
dc.description.sponsorshipNational Science Foundation (U.S.) (Grant 1021614)en_US
dc.language.isoen_US
dc.publisherCopernicus GmbHen_US
dc.relation.isversionofhttp://dx.doi.org/10.5194/esd-3-121-2012en_US
dc.rightsCreative Commons Attribution 3.0en_US
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/en_US
dc.sourceCopernicusen_US
dc.titleVolcano impacts on climate and biogeochemistry in a coupled carbon–climate modelen_US
dc.typeArticleen_US
dc.identifier.citationRothenberg, D. et al. “Volcano Impacts on Climate and Biogeochemistry in a Coupled Carbon–climate Model.” Earth System Dynamics 3.2 (2012): 121–136.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciencesen_US
dc.contributor.mitauthorRothenberg, Daniel Alexander
dc.relation.journalEarth System Dynamicsen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsRothenberg, D.; Mahowald, N.; Lindsay, K.; Doney, S. C.; Moore, J. K.; Thornton, P.en
dc.identifier.orcidhttps://orcid.org/0000-0002-8270-4831
mit.licensePUBLISHER_CCen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record