TITLE:    Palmer LTER: Hydrogen peroxide in the Palmer-LTER region: III. Local
          sources and sinks.
AUTHORS:  G Tien, DM Karl
Palmer LTER Contribution No. 21

During the austral spring and autumn long-term ecological
research (LTER) cruises aboard the R/V Polar Duke (PD92-09,
November 1992) and R/V Nathaniel B. Palmer (NBP93-02, March
through May 1993), we had an opportunity to investigate selected
sources and sinks of hydrogen peroxide (H2O2) in a variety of antarctic
coastal habitats.  These measurements constituted one component of our
comprehensive study of H2O2 dynamics (Karl et al.; Karl and Resing;
Resing et al.; Antarctic Journal, in this issue).  The potential source
terms we evaluated were wet deposition (snow), glacial ice meltwater
and land runoff, and in situ biological processes; photochemical
processes are discussed in a companion paper (Karl and Resing,
Antarctic Journal, in this issue).  The primary H2O2 sink we investigated
was bacterial ensymatic activity.