ASDC | DSCOVR_EPIC_L2_AERF

DSCOVR Level 2

Entry Title: DSCOVR EPIC Level 2 EPICAERUV-Fast

Entry ID: DSCOVR_EPIC_L2_AERF_01

Aerosols Clouds

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 (ultraviolet) 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 wildfires (BIO), desert dust (DST), and sulfate-based (SLF) aerosols. These aerosol models are identical to those assumed in the OMI (Ozone Monitoring Instrument) 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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GENERAL DOCUMENTATION

ASDC Data and Information for DSCOVR

From GCMD Science Keywords:

ATMOSPHERIC CHEMISTRY
CLOUD OPTICAL DEPTH/THICKNESS > CLOUD MICROPHYSICS
PARTICULATE MATTER
AEROSOL OPTICAL DEPTH/THICKNESS
UV AEROSOL INDEX > AEROSOL OPTICAL DEPTH/THICKNESS
DUST/ASH/SMOKE
CLOUD FRACTION > CLOUD PROPERTIES
AEROSOLS

Data Distribution

File Format(s):

HDF-EOS5

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Spatial Information

Spatial Coverage: (S: -90, N: 90), (W: -180, E: 180)
Spatial Coverage Type: Not provided
Coordinate System: Cartesian
Granule Spatial Representation: Cartesian

Locations

GLOBAL LAND SURFACE SEA SURFACE STRATOSPHERE

Temporal Information

Temporal Coverage: 2020-09-01 - Present

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 2023-08-15