g the flux tower upscaling hypothesis at a regional in a complex landscape (NASA-funded project) l Bolstad, Randy Kolka, Mark Kubiske, Faith Ann Heinsch, Ken • Tier 1 – Modeling (BIOME-BGC), 1 km & 250 m MODIS products, & land cover • Tier 2 – FIA data from USFS & remotely sensed data (Landsat & MODIS) • Tier 3 – biomass & soil sampling; soil & leaf gas exchange measurements • Tier 4 – regional, stand, & mobile tower fluxes
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Testing the flux tower upscaling hypothesis at a regional scale
Testing the flux tower upscaling hypothesis at a regional scale in a complex landscape (NASA-funded project) Paul Bolstad, Randy Kolka, Mark Kubiske, Faith Ann Heinsch, Ken Davis. Tier 1 – Modeling (BIOME-BGC), 1 km & 250 m MODIS products, & land cover - PowerPoint PPT Presentation
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Testing the flux tower upscaling hypothesis at a regional scale in a complex landscape (NASA-funded project)
Paul Bolstad, Randy Kolka, Mark Kubiske, Faith Ann Heinsch, Ken Davis
• Tier 1 – Modeling (BIOME-BGC), 1 km & 250 m MODIS products, & land cover
• Tier 2 – FIA data from USFS & remotely sensed data (Landsat & MODIS)
Measurement of fluxes with towers equipped witheddy covariance instrumentations
at two spatial scales
1) Regional levelVery tall tower at WLEF400 m
Results: Region as CO2 source/weak sink
2) Stand level30 m
Results: Forest stand as CO2 sink
Why are these results conflicting?
Mobile eddy covariance and stationary micrometeorological measurements in clearcuts and wetlands – An update
Nick Saliendra
Mark Kubiske
Ron Teclaw
Dan Baumann
USDA Forest Service
North Central Research Station
Ecophysiological Processes Unit
Forestry Sciences Lab
Rhinelander, WI
Two Mobile EC Systems
• 3-D sonic anemometer (CSAT3)• Open path IRGA (LI-7500)• CR5000 data logger• Measurements at 10 Hz• Half-hourly averaging
Five Micrometorological Stations
• PAR (photosynthetically active radiation)• Temperature• Relative humidity• Precipitation• Soil H2O & temperature (clearcuts)• Depth of water table (wetlands)• Half-hourly averaging
Mobile EC sites for Tier 4
Clearcut Sites
Riley Creek (Ameba Salvage)
Thunder Creek
Wetland SitesRiley Creek (Ameba Salvage)
South Fork
Wilson Flowage
Forested Wetland (east of WLEF)
Schedule of mobile flux tower measurements - year 1 (2005) of the NASA project
Date* DoY8-Day Clearcut Sites Wetland Sites
Period Riley Cr. Thunder Cr. Chen1 S. Fork Wilson Fl. Chen2
May 25 - Jun 1 145 1 EC#2
Jun 2 - 9 153 2 EC#2 EC#1
Jun 10 - 17 161 3 EC#1 EC#2
Jun 18 - Jul 25 169 4 EC#2 EC#1
Jun 26 - Jul 3 177 5 EC#1 EC#2
Jul 4 - 11 185 6 EC#2 EC#1
Jul 12 - 19 193 7 EC#1 EC#2
Jul 20 - 27 201 8 EC#1 EC#2
Jul 28 - Aug 4 209 9 EC#2 EC#1
Aug 5 - 12 217 10 EC#1 EC#2
Aug 13 - 20 225 11 EC#2 EC#1
Aug 21 - 28 233 12 EC#1 EC#2
Aug 29 - Sep 5 241 13 EC#2 EC#1
Sep 6 - 13 249 14 EC#1 EC#2
Sep 14 - 21 257 15 EC#2 EC#1
Sep 22 - 29 265 16 EC#1 EC#2
* Date of measurements coincide with the 8-day MODIS compositing periods.