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  2. EOSDIS Data News: September 28, 2018

EOSDIS Data News: September 28, 2018


NASA's Goddard Earth Science Data and Information Services Center (GES DISC) published six out of the ten Cloud Absorption Radiometer (CAR) bidirectional reflectance distribution function (BRDF) datasets. The other four datasets will be published by early November when the data has been produced. The CAR BRDF datasets have received additional processing beyond the L1C products, and include data for bidirectional reflectance factors at the full range of zenith and azimuth angles and the estimated surface-atmosphere albedo. Data and documentation is currently available for the following NASA CAR missions:


NASA's National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) released nine datasets, including:


NASA's Oak Ridge National Laboratory DAAC (ORNL DAAC) published the Arctic-Boreal Vulnerability Experiment (ABoVE) dataset, ABoVE: Directory of Field Sites Associated with 2017 ABoVE Airborne Campaign. This dataset provides a listing of the approximately 6,700 field sites used in planning the ABoVE Airborne Campaign (AAC) for 2017. The sites included point, polygon, and line locations that were used in determining the 2017 AAC flight paths. We intend this compilation to assist investigators in understanding the flight line choices and as a method for investigators to identify ground locations used in the airborne campaign. Data users may also search for the underlying data available at each of these locations. Site descriptors include name, coordinates, principal investigators with emails, data types, long-term archive locations, and links to project descriptions.
ORNL DAAC published the ABoVE dataset, ABoVE: Permafrost Measurements and Distribution Across the Y-K Delta, Alaska, 2016. This dataset provides field observations of thaw depth and dominant vegetation types, a lidar-derived elevation map, and permafrost distribution and probability maps for an area on the coastal plain of the Yukon-Kuskokwim Delta (YKD), in western Alaska, USA. Field data were collected during July 8-17, 2016, to parameterize and to validate the derived permafrost maps. These high-resolution permafrost maps support landscape change analyses and assessments of the impacts of climate change on permafrost in this region of high biological productivity, critical wildlife habitats, and subsistence-based human economy.
ORNL DAAC published the North American Carbon Program (NACP) dataset, Stocks of Surface Soil Organic Carbon Fractions, Great Plains Region, USA, 2007-2010. This dataset provides estimates of total organic soil carbon (SOC), pyrogenic (PyC), particulate (POC), and other organic soil carbon (OOC) fractions in 473 surface layer soil samples collected from stratified-sampling locations in Colorado, Kansas, New Mexico, and Wyoming, USA. Terrain, climate, soil, fire, and land cover data used to predict and map SOC, PyC, POC, and OOC at 1 km resolution throughout the study region are also included. The estimates were derived using a best random forest regression model and cover the period 2007-05-01 to 2010-10-01.
ORNL DAAC published the Atmospheric Tomography Mission (ATom) dataset, ATom: Nucleation Mode Aerosol Size Spectrometer Calibration and Performance Data. This dataset provides extensive calibration and in-flight performance data for two nucleation mode aerosol size spectrometer (NMASS) instruments utilized in ATom. Each NMASS has five condensation particle counters (CPCs) that detect particles above a different minimum size, determined by the maximum vapor supersaturation encountered by the particles. Operated in parallel, the CPCs provide continuous concentrations of particles in different cumulative size classes between 3 and 60 nm. Data provided include: NMASS counting efficiencies and diameters of calibration aerosols, inverted particle size distributions; comparisons of NMASS and Scanning Mobility Particle Sizer (SMPS) results; and performance at flows, temperatures, and pressures measured by both NMASSs and comparison with Ultra-High Sensitivity Aerosol Spectrometer (UHSAS) concentrations collected on board NASA's DC-8 aircraft during an ATom flight in February 2017.
ORNL DAAC published the ATom dataset, ATom: Black Carbon Mass Mixing Ratios from ATom-1 Flights. This dataset provides black carbon (BC) mass mixing ratios (in units of ng BC / kg air) measured during the ATom-1 flight campaign during July and August 2016. The BC-core masses of BC-containing aerosol particles were measured using a Single Particle Soot Photometer (SP2). Conversion to mass mixing ratio (MMR) is achieved by monitoring sample flow. Influences in air mass composition were determined using the Particle Analysis by Laser Mass Spectrometry (PALMS) instruments. Also included here are data from the Cloud, Aerosol and Precipitation Spectrometer (CAPS) instrument which are used to identify measurements taken while in clouds. Finally, the associated latitude, longitude, altitude, and the timestamp of each measurement are included. All data are at ten seconds resolution. ATom-1 flights originated from the Armstrong Flight Research Center in Palmdale, California, fly north to the western Arctic, south to the South Pacific, east to the Atlantic, north to Greenland, and return to California across central North America.

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Page Last Updated: Dec 24, 2020 at 7:19 PM EST