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Daily Maps of Land Surface Thaw State

Surface thaw map

Surface thaw map for Alaska and Northwest Canada on April 25, 2003, derived from the Advanced Microwave Scanning Radiometer (AMSR-E).

A new dataset from NASA's CARVE mission provides the daily thaw state of the Alaskan land surface from 2003 - 2015.

Regional Methane Flux Estimates Over Alaska

Monthly mean CH4 flux estimates.

Monthly mean CH4 flux estimates for Alaska. Values are centered on the mean measurement date for a given month and the shaded regions are the standard error of the mean (figure from Hartery et al. 2018).

A new dataset from NASA's Carbon in Arctic Reservoirs Vulnerability Experiment (CARVE) provides gridded methane flux estimates from 2012-2014.

Snowmelt and surface thaw in Alaska

thawed surfaces in Alaska

Map of thawed land surfaces in Alaska as measured by the AMSR-E satellite radiometer on April 25, 2003.

New data from NASA's CARVE provides daily maps of the thaw state of Alaska's land surface from 2003 to 2014.

Photos and Videos from CARVE

wetlands in Alaska

Photo taken on the 8 October 2015 CARVE flight above the Innoko National Wildlife Refuge in Alaska.

Photos and videos taken during CARVE flights, as well as daily flight reports, are now available online.

FLIR data from CARVE flights

Infrared radiance of the land surface measured by the FLIR instrument onboard the CARVE flight on April 3, 2013.

Infrared radiance of the land surface measured by the FLIR instrument onboard the CARVE flight on April 3, 2013.

A new data set provides measurements from the Forward Looking Infrared (FLIR) camera aboard the CARVE aircraft.

WRF-STILT footprints from CARVE

Surface contours (50% --- blue; 80% --- purple) for the average WRF-STILT influence functions (mid-afternoon averages 2012-2014) show CO2 and CH4 measurements from the CARVE tower have a high sensitivity to the boreal forests and lowlands of interior Alaska. Cyan and red circles are shown for the footprints after filtering (from Karion et al., 2016).

Surface contours for the average WRF-STILT influence functions show CO2 and CH4 measurements from the CARVE tower have a high sensitivity to the boreal forests and lowlands of interior Alaska (from Karion et al., 2016).

Two CARVE data sets provide modeled surface influence for particle receptors located at positions along CARVE flight paths and selected tower locations.

Annual biogenic carbon budget for Alaska

Optimized biogenic net CO2 flux for Alaska 2012-2014. The date of each measurement period is shown at the top of each map. From Commane et al. (2017)

Optimized biogenic net CO2 flux for Alaska 2012-2014. The date of each measurement period is shown at the top of each map. From Commane et al. (2017)

CARVE campaign data show that Alaskan tundra may be shifting from a carbon sink to a carbon source.

Total Column Gases from CARVE Airborne FTS

Total column CH4 retrievals from a CARVE flight on May 23, 2012, flying north from Fairbanks over the North Slope to Barrow.

Total column CH4 retrievals from a CARVE flight on May 23, 2012, flying north from Fairbanks over the North Slope to Barrow.

New data sets provide Level 1 and 2 data from the CARVE Fourier Transform Spectrometer (FTS).

CARVE campaign flight paths

Altitude and flight path recorded during a CARVE flight from Fairbanks to the North Slope of Alaska on November 7, 2014.

Altitude and flight path recorded during a CARVE flight from Fairbanks to the North Slope of Alaska on November 7, 2014.

Flight path, height, pitch, roll, and heading information are available for the C-23 Sherpa aircraft during CARVE campaigns.

Wind speed and direction during CARVE flights

Wind direction recorded outside the C-23 Sherpa aircraft during a CARVE flight on May 6, 2015.

Wind direction recorded outside the C-23 Sherpa aircraft during a CARVE flight on May 6, 2015.

A new dataset provides wind speed and direction data from CARVE flights in 2015.