Liss P. S.

No Thumbnail Available
Last Name
Liss
First Name
P. S.
ORCID

Filters

2005 - 2008 2
2
2
Reset filters

Settings

Search Results

Now showing 1 - 2 of 2
  • Article
    Dimethylsulfide emissions over the multi-year ice of the western Weddell Sea
    (American Geophysical Union, 2008-03-20) Zemmelink, Hendrik J. ; Dacey, John W. H. ; Houghton, Leah A. ; Hintsa, Eric J. ; Liss, P. S.
    This study, conducted in December 2004, is the first to present observations of DMS in a snow pack covering the multi-year sea ice of the western Weddell Sea. The snow layer is important because it is the interface through which DMS needs to be transported in order to be emitted directly from the ice to the overlying atmosphere. High concentrations of DMS, up to 6000 nmol m−3, were found during the first weeks of December but concentrations sharply decline as late spring-early summer progresses. This implies that DMS contained in sea ice is efficiently vented through the snow into the atmosphere. Indeed, field measurements by relaxed eddy accumulation indicate an average release of 11 μmol DMS m−2 d−1 from the ice and snow throughout December.
  • Article
    Emission of dimethylsulfide from Weddell Sea leads
    (American Geophysical Union, 2005-12-10) Zemmelink, Hendrik J. ; Houghton, Leah A. ; Dacey, John W. H. ; Worby, A. P. ; Liss, P. S.
    The distribution of dimethylsulfide (DMS), dimethylsulfoniopropionate (DMSP) and dimethylsulfoxide (DMSO) was examined in lead water in pack ice of the Weddell Sea. Samples were taken by pulling water into a syringe from a series of depths from 0.002 m to 4 m and deeper. Concentrations of DMS, DMSP and DMSO remained low throughout the water column relative to surface water, which was highly enriched. Concentrations of the major sulfur compounds increased by over an order of magnitude during periods with smooth surface water conditions. This increase coincided with a profound stratification of the water column, caused by a decrease in salinity of near surface water. We estimate that the DMS emission from leads and open water in Antarctic sea ice could contribute significantly to the yearly DMS flux from the Southern Ocean.