ASDC | DSCOVR_EPIC_L2_AERF

DSCOVR Level 2

Entry Title: DSCOVR EPIC Level 2 EPICAERUV-Fast

Entry ID: DSCOVR_EPIC_L2_AERF_01

Aerosols

Description

DSCOVR_EPIC_L2_AER_03 is the Deep Space Climate Observatory (DSCOVR) Enhanced Polychromatic Imaging Camera (EPIC) Level 2 UV Aerosol Version 3 data product. Observations for this data product are at 340 and 388 nm and are used to derive near UV aerosol properties. The EPIC aerosol retrieval algorithm (EPICAERUV) uses a set of aerosol models to account for the presence of carbonaceous aerosols from biomass burning and wild fires (BIO), desert dust (DST), and sulfate-based (SLF) aerosols. These aerosol models are identical to those assumed in the OMI algorithm (Torres et al., 2007; Jethva and Torres, 2011).

Aerosol data products generated by the EPICAERUV algorithm are aerosol extinction optical depth (AOD) and single scattering albedo (SSA) at 340, 388 and 500 nm for clear sky conditions. AOD of absorbing aerosols above clouds is also reported (Jethva et al., 2018). In addition, the UV Aerosol Index (UVAI) is calculated from 340 and 388 nm radiances for all sky conditions. AOD is a dimensionless measure of the extinction of light y aerosols due to the combined effect of scattering and absorption. SSA represents the fraction of extinction solely due to aerosol scattering effects. The AI is simply a residual parameter that quantifies the difference in spectral dependence between measured and calculated near UV radiances assuming a purely molecular atmosphere. Because most of the observed positive residuals are associated with the presence of absorbing aerosols, this parameter is commonly known as the UV Absorbing Aerosol Index. EPIC-derived aerosol parameters are reported at a 10 km (nadir) resolution.

DOI

10.5067/DSCOVR/DSCOVR/DSCOVR_EPIC_L2_AERF.01

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Resources and Documentation

Earthdata Forum

PROJECT HOME PAGE

https://epic.gsfc.nasa.gov/science/products/uv

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GENERAL DOCUMENTATION

ASDC Data and Information for DSCOVR

From GCMD Science Keywords:

AEROSOL OPTICAL DEPTH/THICKNESS
DUST/ASH/SMOKE
AEROSOLS
PARTICULATE MATTER
ATMOSPHERIC CHEMISTRY

Data Distribution

File Format(s):

HDF5

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Spatial Information

Spatial Coverage: (-90, 90), (-180, 180)
Spatial Coverage Type: Not provided
Longitude Resolution: 0-360
Latitude Resolution: -90-90
Horizontal Resolution Range: 10 km - < 50 km or approximately .09 degree - < .5 degree
Vertical Resolution Range: None
Coordinate System: Cartesian
Granule Spatial Representation: Cartesian

Locations

GLOBAL OCEAN ARCTIC OCEAN ATLANTIC OCEAN INDIAN OCEAN PACIFIC OCEAN SOUTHERN OCEAN VERTICAL LOCATION LAND SURFACE SEA SURFACE STRATOSPHERE

Temporal Information

Temporal Coverage: 2020-09-01 - 2020-09-27, 2020-09-29 - 2020-09-30, 2021-08-26 - Present
Temporal Resolution: 12-23 per day

Platforms

Solar/Space Observation Satellites

DSCOVR

Deep Space Climate Observatory

EPIC

Earth Polychromatic Imaging Camera

Metadata Dates

Created on 2021-08-06

Last updated on 2022-05-19