uid=BNZ,o=lter,dc=ecoinformatics,dc=org all public read knb-lter-bnz.237.10 David W. Valentine

Department of Forest Sciences University of Alaska Fairbanks O'Neill Bldg Fairbanks AK 99775-7200 United States

(907) 474-7614 (907) 474-6184 dvalentine@alaska.edu http://www.uaf.edu/snras/departments/forestry/faculty/valentine/ Bonanza Creek LTER Data Manager

Boreal Ecology Cooperative Research Unit University of Alaska Fairbanks P.O. Box 756780 Fairbanks AK 99775 USA

907-474-6364 907-474-6251 jpdowning@alaska.edu http://www.lter.uaf.edu 2007-03-01 This table contains concentrations (ppmv) of CO2 and N2O measured at 5, 10, 20, 30, 40, and 50 cm depths below the soil surface in closed-canopy black spruce and mixed hardwood sites (@ 3 replicate sites) in the Caribou Poker Creeks Research Watershed. Samples were taken at weekly or bi-weekly intervals from two profiles in each site during growing seasons from June 1, 1999 through September 17, 2002. This period brackets the Frostfire burn of July 1999; because the fire missed the planned burn sites in mixed hardwoods, the mixed hardwood plots were moved (reflected in the site numbering in the database). carbon dioxide wildfires Soil Atmoshere Soil Atmoshere Biogeochemistry

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http://www.lter.uaf.edu/data_detail.cfm?datafile_pkey=237 1999-06-01 2002-09-17

Completed

Bonanza Creek LTER Data Manager

Boreal Ecology Cooperative Research Unit University of Alaska Fairbanks P.O. Box 756780 Fairbanks AK 99775 USA

907-474-6364 907-474-6251 jpdowning@alaska.edu http://www.lter.uaf.edu Bonanza Creek LTER

Boreal Ecology Cooperative Research Unit University of Alaska Fairbanks P.O. Box 756780 Fairbanks AK 99775 USA

907-474-6364 907-474-6251 Bonanza Creek LTER

This work focused on two major vegetation types occurring in the C4 watershed within the CPCRW: closed canopy black spruce (CBS sites) and mixed hardwood (MH sites). Within each, we selected three replicate burn (B) and control (C sites). The experimental Frostfire burn in July 1999 did not burn any of the planned mixed hardwood burn sites and lightly burned one of the planned black spruce burn sites. The mixed hardwood sites (1-3) were abandoned and new sites (4-6) were established in and near the actual burned areas. Also, CBS-B4 was established to replace the lightly burned CBS-B2 site.

Field methods: Within each site, two profile samplers were inserted into holes drilled into ground just large enough to accommodate them snugly. Ground was tamped around samplers to minimize air leakage along outside of samplers. Lab methods: CO2 and N2O were analyzed on a Shimadzu GC14 gas chromatograph equipped with an Electron Capture Detector.

1999-06-01 2002-09-17

Varies weekly to bi-weekly throughout growing season

237_gas_profiles.csv 237_gas_profiles.csv 1 \n \n column , http://metacat.lternet.edu/das/dataAccessServlet?docid=knb-lter-bnz..&urlTail=/ascii/files/237_gas_profiles.csv Site Site Site of the observation String Site of the observation Quad Quad Quad number String Quad number Depth (cm) Depth (cm) Depth of sensor below mineral soil surface Integer centimeter real DateTime DateTime Date of observation string dd/mm/yyyy Soil CO2 (ppmv) Soil CO2 (ppmv) Volumetric [CO2] in soil atmosphere float ppmv real Soil N2O (ppmv) Soil N2O (ppmv) Volumetric [N2O] in soil atmosphere float ppmv real