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UARS Cryogenic Limb Array Etalon Spectrometer (CLAES) Level 3AT V001 (UARCL3AT) at GES DISC

Entry ID: GES_DISC_UARCL3AT_V001

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Summary

Abstract: The CLAES home page on the WWW is
http://www.spasci.com/CLAES/

The Cryogenic Limb Array Etalon Spectrometer (CLAES) on NASA's Upper Atmosphere Research Satellite (UARS) measured the chemical composition of the stratosphere and mesosphere, and also investigated the depletion of stratospheric ozone and ozone chemistry.

The CLAES instrument measured the thermal emission ... spectra from the Earth's limb perpendicular to the spacecraft velocity vector. The characteristic vibration-rotation line spectra of atmospheric chemical species was measured simultaneously at 20 different limb altitudes in the 10 to 60 km range, with 2.5 km vertical resolution. An iterative relaxation algorithm inverted the measured radiance to yield profiles of temperature and concentrations of O3, H2O, CH4, N2O, NO, NO2, N2O5, HNO3, ClONO2, HCl, CF2Cl2 (CFC-12), CFCl3 (CFC-11), and aerosol absorption coefficients. The CLAES instrument consisted of a solid-etalon Fabry-Perot spectrometer cooled to 18K by a neon and carbon dioxide cryostat designed for an 18-month lifetime (the cryostat lasted 20 months before being exhausted). The etalon detectors had central wavelengths of 2843, 1897, 1605, 1257, 925, 879, 840, 792, and 780 cm^-1 (3.5 to 12.7 micron coverage)

The CLAES level 3A data products consist of profiles that have been interpolated both vertically and horizontally from the original profiles to standard surfaces and locations defined by the UARS project for all limb-viewing instruments. The level 3A format is common to all UARS instruments to allow for intercomparison. The CLAES level 3A data products consist of two product classes; 3AT time-ordered level 3A data, and 3AL latitude-ordered level 3A data.

The level 3AT data products consist of time-ordered profiles, and are spaced at intervals of 1 UARS minute (65.536 seconds), or about 495 km along the tangent track. Level 3AL data products consist of profiles at the intersection of the tangent track spaced at intervals of 4 degrees latitude (e.g. 80, 76, 72, ..., -72, -76, -80).

The CLAES level 3AT and 3AL data consist of 20 granules per day each.
A data granule is one CLAES species or subtype per day. The following subtypes are available: 1) AERO780 - aerosol extinction at 780 cm-1, 2) AERO790 - aerosol extinction at 790 cm-1, 3) AERO843 - aerosol extinction at 843 cm-1, 4) AERO880 - aerosol extinction at 880 cm-1, 5) AERO925 aerosol extinction at 925 cm-1, 6) AERO1257 - aerosol extinction at 1257 cm-1, 7) AERO1605 - aerosol extinction at 1605 cm-1, 8) AERO1897 - aerosol extinction at 1897 cm-1, 9) CF2CL2 - CFC-12, 10) CFCL3 - CFC-11, 11) CH4 - methane, 12) CLONO2 - chlorine nitrate, 13) H2O - water vapor, 14) HNO3 - nitric acid, 15) N2O - nitrous oxide, 16) N2O5_OTHER - dinitrogen pentoxide, 17) NO - nitric oxide, 18) NO2 - nitrogen dioxide, 19) O3B9 - ozone at 780 cm-1 (filter 9), and 20) TEMP - atmospheric temperature. Aerosol extinction coefficients are measured in units of 1/km, chemical species are given in mixing ratios, and temperature is in units of degrees Kelvin. The data are at version 9 (except H2O which is version 7).

The horizontal resolution is 495-km along-track for the level 3AT files, and 4 degrees latitude for the level 3AL files. The vertical resolution for the CLAES profiles is defined by the UARS pressure levels (in mbars) given by:

P(i) = 1000 * 10**(-i/6) for i = 0, 1, 2, ...

which gives approximately 2.5 km increments between pressure surfaces.

Related URL

Link: GET DATA > MIRADOR

Description: UARS CLAES data set access.

Geographic Coverage

(Click for Interactive Map)

Spatial coordinates

N: 80.0

S: -80.0

E: 180.0

W: -180.0

Data Set Citation

Dataset Originator/Creator: Darrel L. Williams

Dataset Title: County Soil Survey Data with Attributes

Dataset Series Name: FED Project Home Page

Dataset Release Place: NASA/GSFC

Dataset Publisher: NASA/GSFC

Data Presentation Form: Map Image

Online Resource: http://fedwww.gsfc.nasa.gov/html/spatial-data223.html

Temporal Coverage

Start Date: 1963-01-01

Stop Date: 1995-08-31

Location Keywords

CONTINENT > NORTH AMERICA

CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MAINE

Science Keywords

HUMAN DIMENSIONS > ENVIRONMENTAL GOVERNANCE/MANAGEMENT > LAND MANAGEMENT

LAND SURFACE > SOILS > SOIL CLASSIFICATION > AQUEPT

LAND SURFACE > SOILS > SOIL CLASSIFICATION > ORCHREPT

LAND SURFACE > SOILS > SOIL CLASSIFICATION > ORTHOD

ISO Topic Category

ENVIRONMENT

GEOSCIENTIFIC INFORMATION

IMAGERY/BASE MAPS/EARTH COVER

PLANNING CADASTRE

Project

FED > Forest Ecosystem Dynamics

Ancillary Keywords

FED

GIS

Originating Center

NASA/GSFC/FED

Data Center

Forest Ecosystem Dynamics Project, Biospheric Sciences Branch, Hydrospheric and Biospheric Sciences Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA

Data Center URL: http://forest.gsfc.nasa.gov/

Data Center Personnel
Name: BRUCE COOK Email: bruce.cook at nasa.gov Contact Address: NASA Goddard Space Flight Center Mailstop 614.4 City: Greenbelt Province or State: MD Postal Code: 20771 Country: USA

Distribution

Distribution Media: WWW

Distribution Format: ARC/INFO EXPORT

Fees: Free

Personnel

STEVEN T. FIFER

Role: TECHNICAL CONTACT

DARREL L. WILLIAMS

Role: INVESTIGATOR

Email: Darrel.L.Williams at nasa.gov

Contact Address:

NASA

Goddard Space Flight Center

Mailstop 614.0

City: Greenbelt

Province or State: MD

Postal Code: 20771

Country: USA

TYLER B. STEVENS

Role: DIF AUTHOR

Phone: (301) 614-6898

Fax: 301-614-5268

Email: Tyler.B.Stevens at nasa.gov

Contact Address:

NASA Goddard Space Flight Center

Global Change Master Directory

City: Greenbelt

Province or State: MD

Postal Code: 20771

Country: USA

Publications/References

See: http://fedwww.gsfc.nasa.gov/html/fedmac/refs.html

USDA. 1994. State Soil Geographic Database (STATSGO), USDA-Soil Conservation
Service, Issued August 1991, Slightly revised May 1993, Revised July 1994.
Miscelllaneous Publication, Number 1492.

Levine, E., K.J. Ranson, J.A. Smith, D.L. Williams, R.G. Knox,
H.H. Shugart, D.L. Urban, and W.T. Lawrence. 1993. Forest
ecosystem dynamics: linking forest succession, soil process and
radiation models. Ecological Modelling 65: 199-219.

Creation and Review Dates

Last DIF Revision Date: 2011-04-06

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