DAAC Home > Resources > News

News

ABoVE

ABoVE: TVPRM Simulated NEE, Alaskan North Slope, 2008-2017

Submitted by ORNL DAAC Staff on 2022-04-26
Image Media
Image Media
Caption

TVPRM net ecosystem exchange: Surface upward mass flux of carbon dioxide expressed as carbon due to emissions from natural sources for 2015-07-01 (left) and 2015-10-01 (right).

Body
Hourly NEE simulated by the TVPRM at 30 km horizontal resolution for the Alaskan North Slope for 2008-2017.
Tags

ABoVE: Annual Disturbance Agents, 1987-2012

Submitted by ORNL DAAC Staff on 2022-03-31
Image Media
Image Media
Caption

Casual agents of disturbance for the year 2006 in the ABoVE domain for tile BH19V15 (A) with the Tasseled Cap change (dTC) image in the same year for the same region (B). In the dTC image, Band_1 is change in brightness; Band_2 is change in greenness; Band_3 is change in wetness. The pixel resolution is 30 meters.

Body
Spatial data on disturbance agents of fire, insects, and logging in the ABoVE core domain at an annual time step from 1987-2012 and 30 m resolution.
Tags

Lake & Wetland Classification, Alaska & Canada, 2017-2019

Submitted by ORNL DAAC Staff on 2022-03-22
Image Media
Image Media
Caption

Figure 1. A preliminary wetland classification for Canadian Shield lakes north of Yellowknife, NWT, Canada. Missing data in some lakes appear as white spots

Body
High-resolution land cover classification focused on water and wetland vegetation classes over three NASA ABoVE Campaign regions.
Tags

PhotoSpec Products, 2019 & 2020 Spring Transition Season

Submitted by ORNL DAAC Staff on 2022-03-09
Image Media
Image Media
Caption

Diagram of the field set-up. This dataset provides the products collected using PhotoSpec mounted at the top of the tower. Measurements collected from other instrumentation shown are not provided in this dataset. Source: Pierrat et al., 2021

Body
Daily averaged SIF, relative SIF, and chlorophyll-carotenoid index, as well as three more variables for both black spruce and larch targets.
Tags

WRF-STILT L4 Footprints and Particle Trajectories, 2016-2019

Submitted by ORNL DAAC Staff on 2022-03-09
Image Media
Image Media
Caption

Subset of STILT footprint domain showing contributions overlain by HYSPLIT trajectories from receptors located at 100 (solid), 500 (dashed), and 1,000 m (dotted) at 19:35 UTC 2012-08-20.

Body
WRF STILT Footprint data products and particle trajectories at circumpolar locations in northern latitudes during 2016-2019.
Tags

ABoVE: Angular-corrected MODIS MAIAC Reflectance

Submitted by ORNL DAAC Staff on 2022-03-01
Image Media
Image Media
Caption

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

Body
Angular corrections of MODIS MAIAC surface reflectances across the ABoVE domain in Alaska and western Canada from 2000 to 2017.
Tags

ABoVE: Methane Fluxes at Big Trail Lake, Alaska, 2019

Submitted by ORNL DAAC Staff on 2022-03-01
Image Media
Image Media
Caption

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.

Body
Methane fluxes from hot-spot and non-hot spot differing surfaces at Big Trail Lake near Fairbanks, AK, USA in 2019.
Tags

ABoVE: The Arctic-Boreal CO2 fluxes (ABCflux) Database, 1989-2020

Submitted by ORNL DAAC Staff on 2022-01-24
Image Media
Image Media
Caption

The flux site distribution in syntheses focused on compiling fluxes from high latitudes (McGuire et al. 2012, Belshe et al. 2013, Natali et al. 2019, Virkkala et al. 2021 and this study (ABCflux)). The Arctic-Boreal Zone is highlighted in dark grey; countries are shown in the background. Based on the unique latitude-longitude coordinate combinations in the tundra, there were 136 tundra sites in ABCflux, 104 tundra sites in Virkkala et al. 2021, 68 tundra sites in Natali et al., 2019, 34 tundra sites in Belshe et al. 2013, and 66 tundra sites in McGuire et al., 2012. Observations that were included in previous studies but not in ABCflux represent fluxes aggregated over seasonal, not monthly periods.

Body
This Arctic-Boreal CO2 fluxes (ABCflux) dataset contains monthly aggregates of terrestrial net ecosystem CO2 exchange and its derived partitioned component fluxes.
Tags