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ABoVE: Angular-corrected MODIS MAIAC Reflectance

Submitted by ORNL DAAC Staff on 2022-03-01
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MAIAC tiles (blue squares with yellow labels) and ABoVE core (red) and extended (purple) domain boundaries covering Alaska and western Canada. Source: adapted from Yu et al. 2021

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Angular corrections of MODIS MAIAC surface reflectances across the ABoVE domain in Alaska and western Canada from 2000 to 2017.
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ABoVE: Methane Fluxes at Big Trail Lake, Alaska, 2019

Submitted by ORNL DAAC Staff on 2022-03-01
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Chambers used to measure diffusive CH4 fluxes. a) Large chamber resting on the pre-installed aluminum collar, sealed on edges with pipe insulation. b) Five-gallon (18.9-liter) bucket with an open bottom and air-tight screw lid to measure hotspot flux locations.

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Methane fluxes from hot-spot and non-hot spot differing surfaces at Big Trail Lake near Fairbanks, AK, USA in 2019.
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ATom: Aerosol Measurements from SOAP, 2018

Submitted by ORNL DAAC Staff on 2022-03-01
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Figure 1. (a) Aerosol extinction calculated using Mie theory from composition-resolved size distributions plotted as a function of measured extinction from the SOAP cavity ring-down spectrometer during the ATom-4 campaign, showing representative error bars. (b) Calculated aerosol absorption and measured absorption from the SOAP photoacoustic spectrometer for cases when absorption >2 *10-6 m-1 (2x the detection limit).

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1-second aerosol extinction and absorption measurements from the SOAP instrument during the 2018 ATom-4 campaign.
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Urban Biogenic CO2 Fluxes from the SMUrF Model, 2010-2019

Submitted by ORNL DAAC Staff on 2022-02-21
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The sums of seasonal mean SMUrF-based NEE and ODIAC-based FFCO2 for CONUS (a), western Europe (b), and East Asia (c) for 2018 in centered panels. City-wide GEE, Reco, NEE, and FFCO2 over JJA 2018 are provided around the centered panels.

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Estimates of biogenic CO2 flux components from the Solar-Induced Fluorescence for Modeling Urban biogenic Fluxes (SMUrF) model.
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NACP: Greenhouse Gases Across Expanded Urban Network, 2000-2019

Submitted by ORNL DAAC Staff on 2022-02-21
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Carbon dioxide concentrations at the MUR site in Salt Lake City, Utah, show a pronounced seasonal pattern of higher CO2 in the winter months. 

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Updates to hourly urban greenhouse gas measurements for cities in the CO2-USA Data Synthesis Network for 2000-2019.
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