Changes in continental and sea-salt atmospheric loadings in central Greenland during the most recent deglaciation: model-based estimates

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dc.contributor.authorAlley, R. B.
dc.contributor.authorFinkel, R. C.
dc.contributor.authorNishiizumi, K.
dc.contributor.authorAnandakrishnan, S.
dc.contributor.authorShuman, Christopher
dc.contributor.authorMershon, G.
dc.contributor.authorZielinski, G. A.
dc.contributor.authorMayewski, P. A.
dc.date.accessioned2022-02-22T14:57:48Z
dc.date.available2022-02-22T14:57:48Z
dc.date.issued2017-01-20
dc.description.abstractBy fitting a very simple atmospheric impurity model to high-resolution data on ice accumulation and contaminant fluxes in the GISP2 ice core, we have estimated changes in the atmospheric concentrations of soluble major ions, insoluble particulates and ¹⁰Be during the transition from glacial to Holocene conditions. For many species, changes in concentration in the ice typically overestimate atmospheric changes, and changes in flux to the ice typically underestimate atmospheric changes, because times of increased atmospheric contaminant loading are also times of reduced snowfall. The model interpolates between the flux and concentration records by explicitly allowing for wet- and dry-deposition processes. Compared to the warm Preboreal that followed, we estimate that the atmosphere over Greenland sampled by snow accumulated during the Younger Dryas cold event contained on average four–seven times the insoluble particulates and nearly seven times the soluble calcium derived from continental sources, and about three times the sea salt but only slightly more cosmogenic ¹⁰Be.en_US
dc.description.sponsorshipWe thank the GISP2 Science Management Office, the U.S. 109th Air National Guard, the Polar Ice Coring Office and the U.S. National Ice Core Laboratory for scientific and logistical support, the U.S. National Science Foundation Office of Polar Programs for financial support (R.B.A. also thanks NASA-EOS and the D. and L. Packard Foundation for financial support), and R. Bales, M. Bergin, J. Dibb, D. Lamb, D. Meeker, E. Saltaman, E. Wolff an anonymous reviewer, and other GISP2 colleagues for advice and helpful suggestions. This work was partially supported under the auspices of the U. S. Department of Energy by Lawrence Livermore National Laboratory under contract W-7405-Eng-48.en_US
dc.description.urihttps://www.cambridge.org/core/journals/journal-of-glaciology/article/changes-in-continental-and-seasalt-atmospheric-loadings-in-central-greenland-during-the-most-recent-deglaciation-modelbased-estimates/BBA0AF5E502A40A2BA0948FF823C6301en_US
dc.format.extent12 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m2ldnp-7z5i
dc.identifier.citationAlley, R. B., R. C. Finkel, K. Nishiizumi, S. Anandakrishnan, C. A. Shuman, G. Mershon, G. A. Zielinski, and P. A. Mayewski. 1995. “Changes in Continental and Sea-Salt Atmospheric Loadings in Central Greenland during the Most Recent Deglaciation: Model-Based Estimates.” Journal of Glaciology 41 (139). Cambridge University Press: 503–14. doi:10.3189/S0022143000034845.en_US
dc.identifier.urihttps://doi.org/10.3189/S0022143000034845
dc.identifier.urihttp://hdl.handle.net/11603/24306
dc.language.isoen_USen_US
dc.publisherCambridge University Pressen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Joint Center for Earth Systems Technology
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.en_US
dc.rightsPublic Domain Mark 1.0*
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.titleChanges in continental and sea-salt atmospheric loadings in central Greenland during the most recent deglaciation: model-based estimatesen_US
dc.typeTexten_US
dcterms.creatorhttps://orcid.org/0000-0001-9606-767Xen_US

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