Particulate and water-soluble carbon measured in recent snow at Summit, Greenland

Details Particulate and water-soluble carbon measured in recent snow at Summit, Greenland Particulate and water-soluble carbon measured in recent snow at Summit, Greenland

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3416505h&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 16, CiteID L16505

Physics

Geophysics

8

Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801, 4906), Cryosphere: Ice Sheets, Cryosphere: Snow (1827, 1863), Cryosphere: Contaminants (0432), Exploration Geophysics: Downhole Methods

Scientific paper

Water-soluble organic carbon (WSOC), water-insoluble particulate organic carbon (WIOC), and particulate elemental carbon (EC) were measured simultaneously for the first time on the Greenland Ice Sheet in surface snow and in a 3-meter snow pit. Snow pit concentrations reveal that, on average, WSOC makes up the majority (89%) of carbonaceous species, followed by WIOC (10%) and EC (1%). The enhancement of OC relative to EC (ratio 99:1) in Greenland snow suggests that, along with atmospheric particulate matter, gaseous organics contribute to snow-phase OC. Comparison of summer surface snow concentrations in 2006 with past summer snow pit layers (2002-2005) found a significant depletion in WSOC (20-82%) and WIOC (46-65%) relative to EC for 3 of the 4 years. The apparent substantial loss of WSOC and WIOC in aged snow suggests that post-depositional processes, such as photochemical reactions, need to be considered in linking ice core records of organics to atmospheric concentrations.

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