Wind roses averaged over (a) May-September and (b) October-April for all 3 years during mid-afternoon hours at 32 m above ground level on the CARVE tower (from Karion et al., 2016).
A new CARVE dataset provides measurements of CO2, CH4, and other gases from a fixed tower outside Fairbanks, Alaska.
The eddy covariance site at Barrow, Alaska.
A new CARVE dataset provides 2011-2015 flux data from three eddy covariance tower sites in Alaska.
Flask sampling system for aircraft measurements. Left: Programmable Flash Package (PFP) containing 12 flasks. Right: Programmable Compressor Package (PCP) containing pumps for pressurizing the flasks. (Image courtesy: http://www.esrl.noaa.gov/gmd/ccgg/aircraft/sampling.html)
The CARVE campaign analyzed whole-air samples from aircraft and a 32m tower above Alaska.
Frost clings to an eddy covariance tower in Barrow, Alaska. The sensors measure methane emissions year round and are equipped with deicers to prevent them from malfunctioning in the Arctic's frigid temperatures. The tower also measures other meteorological variables, including air temperature, humidity, soil temperature, and soil moisture. (Courtesy S. Losacco)
Scientists with CARVE track methane emission in Alaska all year round.
Figure (a) Map of the CARVE aerosol sampling stations in Alaska, (b) daily sum of fire radiative power from MODIS active fires in 2013 Alaska (from Mouteva et al 2015).
Carbon aerosol data was collected by NASA's Carbon in Arctic Reservoirs Vulnerability Experiment (CARVE) in summer 2013.
The CARVE C-23 Sherpa prepares to take off from Fairbanks, AK.
The CARVE campaign sampled greenhouse gases in the Arctic using aircraft and ground-based sensors.
Methane concentrations during a CARVE flight on May 27, 2012.
Atmospheric gas concentrations measured over Alaska by the Carbon in Arctic Reservoirs Vulnerability Experiment (CARVE) are now available.
CLM4.5 modeled annual land-atmosphere CO2 flux in Alaska under future warming and permafrost thaw scenarios (from Parazoo et al., 2016).
Satellite and airborne observations of CO2 flux were used to simulate present and future CO2 flux.
Location of the CARVE tower (red) and 50% and 80% surface influence contours for the average WRF-STILT influence functions (from Karion et al 2016).
A new data set investigates the atmospheric concentrations of CO2 and CH4 from 2012-2014 in boreal Alaska.
Gross ecosystem CO2 exchange (GEE) calculated using MODIS Enhanced Vegetation Index for 21:00 UTC, August 2, 2013. GEE typical of a mid-summer day.
A new CARVE data set provides 3-hourly estimates of gross ecosystem CO2 exchange (GEE) and respiration for Alaska from 2012 to 2014.
