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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: NASA's Upper Atmosphere Research Satellite (UARS)

Dataset Title: UARS Cryogenic Limb Array Etalon Spectrometer (CLAES) Level 3AT

Version: 001

Online Resource: http://mirador.gsfc.nasa.gov/cgi-bin/mirador/presentNavigation.pl?t...

Temporal Coverage

Start Date: 1991-10-25

Stop Date: 1993-05-05

Location Keywords

GEOGRAPHIC REGION > GLOBAL

VERTICAL LOCATION > MESOSPHERE

VERTICAL LOCATION > STRATOSPHERE

Science Keywords

ATMOSPHERE > AEROSOLS > AEROSOL EXTINCTION

ATMOSPHERE > AIR QUALITY > NITROGEN OXIDES

ISO Topic Category

CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

ENVIRONMENT

SOCIETY

Project

EOSDIS > Earth Observing System Data Information System

IPCC > Intergovernmental Panel on Climate Change

ESIP > Earth Science Information Partners Program

DDC > IPCC Data Distribution Centre

Access Constraints None

Use Constraints The Intergovernmental Panel on Climate Change (IPCC) and Trustees of Columbia University in the City of New York hold the copyright of this dataset. Users are prohibited from any commercial, non-free resale, or redistribution without explicit written permission from IPCC and CIESIN. Users should acknowledge IPCC as the source used in the creation of any reports, publications, new datasets, derived products, or services resulting from the use of this dataset. IPCC and CIESIN also request reprints of any publications and notification of any redistributing efforts.

Ancillary Keywords

CIESIN > Environmental Protection > Climate > Climate Change

CIESIN > Environmental Protection > Ecology > Ecosystems

Data Set Progress

COMPLETE

Originating Center

SEDAC

Data Center

Socioeconomic Data and Applications Center

Data Center URL: http://sedac.ciesin.columbia.edu/
Dataset ID: CIESIN_SEDAC_IPCC_OBSERVED

Data Center Personnel
Name: SEDAC USER SERVICES Phone: +1 845-365-8920 Fax: +1 845-365-8922 Email: ciesin.info at ciesin.columbia.edu Contact Address: 61 Route 9W, P.O. Box 1000 City: Palisades Province or State: NY Postal Code: 10964 Country: USA

World Data Center for Human Interactions in the Environment

Data Center URL: http://sedac.ciesin.columbia.edu/wdc/
Dataset ID: CIESIN_SEDAC_IPCC_OBSERVED

Data Center Personnel
Name: ROBERT CHEN Phone: 1-845-365-8952 Fax: 1-845-365-8922 Email: bchen at ciesin.columbia.edu Contact Address: WDC for Human Interactions in the Environment CIESIN/Columbia University P. O. Box 1000 61 Route 9W City: Palisades Province or State: NY Postal Code: 10964 Country: USA

Distribution

Distribution Media: Online HTTP

Distribution Format: HTML

Fees: 0

Distribution Media: ONLINE HTTP

Distribution Size: 1.05 MB

Distribution Format: XLS

Fees: 0

Personnel

SEDAC USER SERVICES

Role: TECHNICAL CONTACT

Phone: +1 845-365-8920

Fax: +1 845-365-8922

Email: ciesin.info at ciesin.columbia.edu

Contact Address:

61 Route 9W, P.O. Box 1000

City: Palisades

Province or State: NY

Postal Code: 10964

Country: USA

CIESIN METADATA ADMINISTRATION

Role: DIF AUTHOR

Phone: +1 845-365-8988

Fax: +1 845-365-8922

Email: metadata at ciesin.columbia.edu

Contact Address:

61 Route 9W, P.O. Box 1000

City: Palisades

Province or State: New York

Postal Code: 10964

Country: USA

Publications/References

Intergovernmental Panel on Climate Change (IPCC) (1998), IPCC IS92 Emissions Scenarios (A, B, C, D, E, F) Dataset Version 1.1, Cambridge University Press, New York, NY, http://sedac.ciesin.columbia.edu/data/set/ipcc-assess-is92-emission...

Extended Metadata Properties

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Creation and Review Dates

DIF Creation Date: 2009-02-10

Last DIF Revision Date: 2012-04-09

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