ASDC | AerosolUV

DSCOVR Level 2

Entry Title: EPIC Near UV Aerosol Products

Entry ID: AerosolUV_02

Aerosols

Description

Deep Space Climate Observatory (DSCOVR) Enhanced Polychromatic Imaging Camera (EPIC) observations at 340 and 388 nm 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/EPIC/DSCOVR/L2_AER.002

Citation Styles for this Dataset

Resources and Documentation

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NOAA Overview of DSCOVR: Deep Space Climate Observatory

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GENERAL DOCUMENTATION

DSCOVR EPIC UV Aerosol Products Overview

From GCMD Science Keywords:

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

Data Distribution

Spatial Information

Spatial Coverage: (S: -90, N: 90), (W: -180, E: 180)
Spatial Coverage Type: Not provided
Longitude Resolution: 10 km
Latitude Resolution: 10 km
Horizontal Resolution Range: 10 km - < 50 km or approximately .09 degree - < .5 degree
Coordinate System: Geodetic
Granule Spatial Representation: Cartesian

Locations

CONTINENT AFRICA ANTARCTICA ASIA AUSTRALIA/NEW ZEALAND NORTH AMERICA EUROPE SOUTH AMERICA GLOBAL GLOBAL LAND GLOBAL OCEAN ARCTIC OCEAN ATLANTIC OCEAN INDIAN OCEAN PACIFIC OCEAN SOUTHERN OCEAN STRATOSPHERE LAND SURFACE SEA SURFACE OCEAN VERTICAL LOCATION

Temporal Information

Temporal Coverage: 2015-07-04 - 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 2019-09-13

Last updated on 2019-10-31