Field Notes

<--2010-07-28 09:00:00 | 2010-08-05 13:30:00-->
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Sherman Island: 2010-07-28 09:00:00 (DOY 209)
Author: Jaclyn Hatala
Others: Joe

Sherman: Took measurements with the LAI-2200 along the 200m transect. Clipped 5 biomass/LAI plots for lab analysis - mean LAI as measured by the lab scanner was 3.8. LAI seems to be increasing over the past few weeks at Sherman. Took Moisture Point measurements inside the enclosure - was a little wetter than last week. Water table depth is around 52cm. All the Vaisala soil CO2 probes are in good working order. I collected 9 reflectance spectra measurements from the flux footprint. I also took 2 soil depth profiles from the surface down to 65cm (5 samples in each profile) and analyzed them for CH4/CO2 flux on the LGR/LI-820 in the lab when returning. Have to analyze the data more closely, but at first glance it looks like CO2 flux was huge at depths below about 40cm, so microbial activity, soil subsidence, or both are really at work right now. Methane flux was close to zero for all samples, even when I ran the system in anoxic (N2 only) conditions to eliminate methanotrophy.

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