Robert, Your references are a bit old. The data in the graph I gave is the data for minimum extent thru 2008 and came from a US CCSP report. The graph is an updated version (including 2008) of the one in the original reference:
Stroeve, J., M Serreze, S. Drobot, S. Gearheard, M. Holland, J. Maslanik, W. Meier, and T. Scambos, 2008: Arctic sea ice extent plummets in 2007. Eos, 89(2), 13-14. It's rather like the bottom graph (JAS) from UIUC as seen below: http://arctic.atmos.uiuc.edu/cryosphere/IMAGES/seasonal.extent.1900-2007.jpg It's also nearly identical to the latest from the US NSIDC graph for the September data, but using the September average overstates the actual minimum extent a bit: ftp://sidads.colorado.edu/DATASETS/NOAA/G02135/Sep/N_09_plot.png The daily extent history looks like this: http://nsidc.org/images/arcticseaicenews/20100105_Figure2.png You are probably not aware that the folks at UIUC like to focus on the variable called "concentration" which produces a lower area than the variable called "extent", which I happen to think is a better indicator of the present situation. Also, there's a new report in which the authors claim the melt season in the Arctic has lengthened by a significant number of days. And, looking only at the gyre circulation, one can not determine the sinking which is the THC. the location of the "northern waters" does not include the Nordic Seas... E. S. --- Robert Indigo Ellison wrote: > Eric, > > I have been trying to make sense of your 'photbucket' image - it looks > wrong on several counts. First - long term. See: > > Polyakov, I.V., Alekseev, G.V., Bekryaev, R.V., Bhatt , U.S. , Colony, > R., Johnson, M.A., Karklin, V.P., Walsh, D. and Yulin, A.V. 2003. Long- > Term Ice Variability in Arctic Marginal Seas . Journal of Climate > 16, 2078-2085. > > The graph can be at Ole Humlum's site at:http://www.climate4you.com/ > on the sea ice page. > > Secondly - on the 1979 onwards satellite record. Here is a university > source for sea ice extent. > > http://arctic.atmos.uiuc.edu/cryosphere/IMAGES/global.daily.ice.area.withtrend.jpg > > You can see it is nothing like your 'photobucket' exercise. Why the > hell is this a valid source at all? It is really just bloody idiocy. > You will trust an unreferenced internet source over peer reviewed > science because it aggrees with your preconceptions. > > The transport index reported by UNESCO is about transport of heat and > salt to northern waters. The latter is the very essence of thermo- > haline(salt)circulation. > > Seriously!!!! > > Robert -- You received this message because you are subscribed to the Google Groups Global Change ("globalchange") newsgroup. Global Change is a public, moderated venue for discussion of science, technology, economics and policy dimensions of global environmental change. Posts will be admitted to the list if and only if any moderator finds the submission to be constructive and/or interesting, on topic, and not gratuitously rude. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/globalchange
