Sagehen Creek Field Station

14 Jul, 05 AM - 17 Jul, 05 AM

A continuance of a 2007 pilot study will be conducted on July 14-17, 2008 in which 12-16 flux measurements will be made from a variety of western coniferous forest vegetation types. Flux measurements involve placing two-component, aluminum chambers (~160 L volume) over the soils/vegetation of interest and collecting air samples into previously evacuated flasks during a 30 minute enclosure period. The stable isotope tracer technique involves the additional injection of part-per-trillion level concentrations of 13CH3X (X = Br or Cl) to the headspace along with the inert tracers SF6 and F-113 at the initiation of the enclosure period. The air samples are then transported back to UC Berkeley for analysis by gas chromatography/mass spectrometry (GC/MS). Soil temperatures (5 cm, 10 cm) will also be monitored using soil thermocouples. Small soil samples (10 cm cores, 5 cm diameter) will be taken adjacent to each chamber site for analysis in the laboratory for moisture content, pH, and combustible organic matter. Where possible, small subplots (0.25 m2) will be harvested at each site for above ground biomass estimates and halide content in leaf tissue. No permanent equipment will be left on-site.

Visit #15740 @Sagehen Creek Field Station

Approved

Under Project # 8381 | Research

Methyl Halide Fluxes

graduate_student - University of California, Berkeley

Reservation Members(s)

Triffid Abel Jul 14 - 17, 2008 (4 days)
Group of 2 Undergraduate Student Jul 14 - 17, 2008 (4 days)

Reserve Resources(s) | Create Invoice

West Cabin (Lower Camp) 3 Jul 14 - 17, 2008