Ice sheets as a significant source of highly reactive nanoparticulate iron to the oceans : -klou.tt/mkqd672op59d <http://t.co/HCumOJNF68>
Ice sheets as a significant source of highly reactive nanoparticulate iron to the oceans - Jon R. Hawkings <http://www.nature.com/ncomms/2014/140521/ncomms4929/full/ncomms4929.html#auth-1> , - Jemma L. Wadham <http://www.nature.com/ncomms/2014/140521/ncomms4929/full/ncomms4929.html#auth-2> , - Martyn Tranter <http://www.nature.com/ncomms/2014/140521/ncomms4929/full/ncomms4929.html#auth-3> , - Rob Raiswell <http://www.nature.com/ncomms/2014/140521/ncomms4929/full/ncomms4929.html#auth-4> , - Liane G. Benning <http://www.nature.com/ncomms/2014/140521/ncomms4929/full/ncomms4929.html#auth-5> , - Peter J. Statham <http://www.nature.com/ncomms/2014/140521/ncomms4929/full/ncomms4929.html#auth-6> , - Andrew Tedstone <http://www.nature.com/ncomms/2014/140521/ncomms4929/full/ncomms4929.html#auth-7> , - Peter Nienow <http://www.nature.com/ncomms/2014/140521/ncomms4929/full/ncomms4929.html#auth-8> , - Katherine Lee <http://www.nature.com/ncomms/2014/140521/ncomms4929/full/ncomms4929.html#auth-9> - & Jon Telling <http://www.nature.com/ncomms/2014/140521/ncomms4929/full/ncomms4929.html#auth-10> - Affiliations <http://www.nature.com/ncomms/2014/140521/ncomms4929/full/ncomms4929.html#affil-auth> - Contributions <http://www.nature.com/ncomms/2014/140521/ncomms4929/full/ncomms4929.html#contrib-auth> - Corresponding author <http://www.nature.com/ncomms/2014/140521/ncomms4929/full/ncomms4929.html#corres-auth> Nature Communications 5, Article number: 3929 doi:10.1038/ncomms4929 Received 26 August 2013 Accepted 22 April 2014 Published 21 May 2014 Article tools - PDF - Citation <http://www.nature.com/ncomms/2014/140521/ncomms4929/ris/ncomms4929.ris> - Reprints <https://s100.copyright.com/AppDispatchServlet?publisherName=NPGR&publication=Nature+Communications&title=Ice+sheets+as+a+significant+source+of+highly+reactive+nanoparticulate+iron+to+the+oceans&contentID=10.1038%2Fncomms4929&volumeNum=5&issueNum=&numPages=&pageNumbers=pp%24%7BnPage.startPage%7D&orderBeanReset=true&publicationDate=2014-05-21&author=Jon+R.+Hawkings%2C+Jemma+L.+Wadham%2C+Martyn+Tranter%2C+Rob+Raiswell%2C+Liane+G.+Benning%2C+Peter+J.+Statham> - Rights & permissions <https://s100.copyright.com/AppDispatchServlet?publisherName=NPG&publication=Nature+Communications&title=Ice+sheets+as+a+significant+source+of+highly+reactive+nanoparticulate+iron+to+the+oceans&contentID=10.1038%2Fncomms4929&volumeNum=5&issueNum=&numPages=&pageNumbers=pp%24%7BnPage.startPage%7D&publicationDate=2014-05-21&cc=by&author=Jon+R.+Hawkings%2C+Jemma+L.+Wadham%2C+Martyn+Tranter%2C+Rob+Raiswell%2C+Liane+G.+Benning%2C+Peter+J.+Statham> - Article metrics <http://www.nature.com/ncomms/2014/140521/ncomms4929/metrics> Abstract - Abstract• - Introduction <http://www.nature.com/ncomms/2014/140521/ncomms4929/full/ncomms4929.html#introduction> • - Results <http://www.nature.com/ncomms/2014/140521/ncomms4929/full/ncomms4929.html#results> • - Discussion <http://www.nature.com/ncomms/2014/140521/ncomms4929/full/ncomms4929.html#discussion> • - Methods <http://www.nature.com/ncomms/2014/140521/ncomms4929/full/ncomms4929.html#methods> • - Additional information <http://www.nature.com/ncomms/2014/140521/ncomms4929/full/ncomms4929.html#additional-information> • - References <http://www.nature.com/ncomms/2014/140521/ncomms4929/full/ncomms4929.html#references> • - Acknowledgements <http://www.nature.com/ncomms/2014/140521/ncomms4929/full/ncomms4929.html#acknowledgments> • - Author information <http://www.nature.com/ncomms/2014/140521/ncomms4929/full/ncomms4929.html#author-information> The Greenland and Antarctic Ice Sheets cover ~\n10% of global land surface, but are rarely considered as active components of the global iron cycle. The ocean waters around both ice sheets harbour highly productive coastal ecosystems, many of which are iron limited. Measurements of iron concentrations in subglacial runoff from a large Greenland Ice Sheet catchment reveal the potential for globally significant export of labile iron fractions to the near-coastal euphotic zone. We estimate that the flux of bioavailable iron associated with glacial runoff is 0.40–2.54 Tg per year in Greenland and 0.06–0.17 Tg per year in Antarctica. Iron fluxes are dominated by a highly reactive and potentially bioavailable nanoparticulate suspended sediment fraction, similar to that identified in Antarctic icebergs. Estimates of labile iron fluxes in meltwater are comparable with aeolian dust fluxes to the oceans surrounding Greenland and Antarctica, and are similarly expected to increase in a warming climate with enhanced melting. Fred Zimmerman Ann Arbor, Michigan, USA "a fox, not a hedgehog" -- Isaiah Berlin -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to geoengineering+unsubscr...@googlegroups.com. To post to this group, send email to geoengineering@googlegroups.com. Visit this group at http://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout.
