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Merged Atmospheric CO2, CH4, and Meteorological Data, 2017

Submitted by ORNL DAAC Staff on 2023-02-23
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A map showing the ground tracks for the airborne campaign with a table summarizing each flight. The colors in the table match those shown in the ground tracks. Image is from the related dataset Abshire et al. (2022).

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In situ airborne measurements of atmospheric chemistry from 2017-07-20 to 2017-08-08 over Alaska, US, and the Yukon and Northwest Territories of Canada.
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Bias-Corrected IMERG Monthly Precipitation for Alaska & Canada, 2000-2020

Submitted by ORNL DAAC Staff on 2023-02-14
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Two examples of uncorrected and corrected months Canada-Alaska domain. The correction is applied to pixels > 500 m, so the correction is seen primarily in mountainous areas. Figure from Lober et al. (in review).

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Bias-corrected IMERG monthly precipitation data for Alaska & Canada from June 2000 - December 2020.
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ABoVE: Hyperspectral Imagery AVIRIS-NG, 2017-2019 V2

Submitted by ORNL DAAC Staff on 2023-02-06
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A portion of the quicklook image from flight line ang20170714t212855 over Barrow, Alaska on July 14, 2017. Two sites (AB_B10_L001_FL175_PipelineLake and AB_B10_L003_FL175_PipelineLake) of interest to the ABoVE project are visible. Flight altitude was approximately 5,400 m with very thin cirrus cloud cover.

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Level 1 radiance and Level 2 surface reflectance measured by the AVIRIS-NG instrument during flights over the ABoVE domain from June to August in 2017 and July to August in 2018 and 2019.
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Post-Fire and Unburned Vegetation Community & Field Data, NWT, Canada, 2017

Submitted by ORNL DAAC Staff on 2022-09-29
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Researchers collecting data on vegetation and biophysical characteristics at a study site in Northwest Territories of Canada that was burned by wildfires in 2014-2015.

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Vegetation community characteristics, soil moisture, and biophysical data collected in 2017 from 11 study sites in the ABoVE Study area.
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ABoVE: Burned Area, Depth, and Combustion, 2001-2019

Submitted by ORNL DAAC Staff on 2022-09-29
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Total burned area (a), total carbon emissions (b), mean combustion (c), and mean burn depth (d) between 2001-2019 aggregated to a 70 km grid. Note that burned area (a) covers all of Alaska and Canada whereas all other metrics cover the ABoVE extended domain.

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Annual gridded estimates of fire locations and associated burn fraction per pixel for Alaska and Canada at approximately 500 m spatial resolution for the period 2001-2019.
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ABoVE: Tundra Plant Leaf-level Spectral Reflectance

Submitted by ORNL DAAC Staff on 2022-07-18
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Schematic of FluoWat leaf clip operation for measuring leaf reflectance, transmittance, and upward and downward fluorescence (SIF). The leaf is placed in the clip and illuminated through the open port (A). Reflected and transmitted radiance are measured by attaching a fiber optic cable from the spectrometer to the top or bottom of the clip. To measure fluorescence spectra a low pass filter is placed across the illumination port (B). Two filters are applied in sequence, they block incident wavelengths above 650 nm and 700 nm, therefore any radiance measured in the longer wavelengths can come only from fluorescence.

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Leaf-level variables of high latitude plant samples collected near Fairbanks, Utqiagvik, and Toolik, Alaska, U.S., during the summers of 2019, 2020, and 2021.
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ABoVE: Landsat Vegetation Greenness Trends, 1985-2019

Submitted by ORNL DAAC Staff on 2022-07-18
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Change in greenness of boreal forest across the northern hemisphere between 2000 to 2019, estimated from an ensemble of vegetation indices derived from Landsat imagery. 

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Interannual trends in annual maximum vegetation greenness from 1985 to 2019 for recently undisturbed areas in the boreal forest biome.
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