Related URL

Link: VIEW PROJECT HOME PAGE Description: MODIS DAAC Web page at NSIDC Link: VIEW PROJECT HOME PAGE Description: MODIS Data at NSIDC Home Web page

Geographic Coverage

N: 90.0

S: -90.0

E: 180.0

W: -180.0

Data Set Citation

Dataset Originator/Creator: D. Hall, V. Salomonson Dataset Title: MODIS/Aqua Sea Ice Extent 5-Min L2 Swath 1km, Version 4 Dataset Release Date: 2000-09-01 Dataset Release Place: Boulder, CO Dataset Publisher: National Snow and Ice Data Center (NSIDC) Version: 4 Online Resource: http://nsidc.org/data/myd29.html

Temporal Coverage

Start Date: 2002-07-04

Stop Date: 2006-12-31

Location Keywords

GEOGRAPHIC REGION > GLOBAL OCEAN

Data Resolution

Temporal Resolution: 5-min

Science Keywords

CRYOSPHERE >SEA ICE >ICE EXTENT    [Definition]

CRYOSPHERE >SEA ICE >ICE TEMPERATURE    [Definition]

OCEANS >SEA ICE >ICE EXTENT    [Definition]

OCEANS >SEA ICE >ICE TEMPERATURE    [Definition]

ISO Topic Category

CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

Platform

AQUA >Earth Observing System, AQUA    [Information]

Instrument

MODIS >Moderate-Resolution Imaging Spectroradiometer    [Information]

SPECTRORADIOMETERS    [Information]

Project

EOSDIS >Earth Observing System Data Information System    [Information]

ESIP >Earth Science Information Partners Program    [Information]

Quality

In MYD29 Version 4 (V004) data, the sea ice algorithm uses Aqua/MODIS band 7. Good quality has been observed in the sea ice maps; however, investigation of effects of the switch to band 7 is continuing. The cloud mask product, MYD35_L2, used as input to the MYD29 algorithm also changed to use of band 7. The effect of that change relative to sea ice/cloud discrimination is being investigated. The IST was not affected by the switch to band 7 except, possibly indirectly by the cloud mask switch to band 7. Validation status is set at provisional until further validation work specific to Aqua IST maps can be completed. Provisional means that the products are partially validated; incremental improvements are still occurring. These are early science validated products and are useful for exploratory and process scientific studies. Quality may not be optimal since validation and quality assurance are ongoing. Users are urged to review product quality summaries before publication of results. Analysis of the quality of the sea ice data products is an ongoing activity. Specific information on the science quality of the sea ice data products is reported in the ScienceQualityFlagExplanation object in the CoreMetadata.0 global attribute. The URL for the quality assessment site is given in the product metadata and is linked to from the EOS Data Gateway (EDG) when ordering data. The ScienceQualityFlagExplanation is changed in response to analysis and should be checked for updated information. In the MOD29 and MOD29P1D data products there are two instances of the ScienceQualityFlagExplanation, one for sea ice determined by reflectance data and one for IST written in the metadata. Information on both is posted at that URL. The Ice Surface Temperature PixelQA and the Sea Ice by Reflectance PixelQA data fields provide additional information on algorithm results for each pixel within a spatial context, and are used as a measure of usefulness for sea ice data. QA data are stored as bit flags. QA information is extracted by reading the bits within a byte (See MODIS Sea Ice Quality Assurance Fields). The QA information tells if algorithm results were nominal, abnormal, or if other defined conditions were encountered for a pixel (Riggs, Hall, and Salomonson 2003). See MODIS Land Quality Assessment for further details.

Keywords

Antarctic

Arctic

Climatology

DAAC

EASE-Grid

ECS

EOSDIS

Global Change

Gridded

Ice Surface Temperature

IST

NASA

NSIDC

Polar

Remote Sensing

Sea Ice

Swath

Data Set Progress

COMPLETE

Data Center

NSIDC Distributed Active Archive Center    [Information] Data Center URL: http://nsidc.org/daac/index.html Dataset ID: MYD293, MYD294 Data Center Personnel Name: NSIDC USER SERVICES Phone: +1 (303) 492-6199 Fax: +1 (303) 492-2468 Email: nsidc at nsidc.org Contact Address: National Snow and Ice Data Center CIRES, 449 UCB University of Colorado City: Boulder Province or State: CO Postal Code: 80309-0449 Country: USA

National Snow and Ice Data Center    [Information] Data Center URL: http://nsidc.org Dataset ID: MYD293, MYD294 Data Center Personnel Name: NSIDC USER SERVICES Phone: +1 (303) 492-6199 Fax: +1 (303) 492-2468 Email: nsidc at nsidc.org Contact Address: National Snow and Ice Data Center CIRES, 449 UCB University of Colorado City: Boulder Province or State: CO Postal Code: 80309-0449 Country: USA

Distribution

Distribution_Media: upon request Distribution_Size: 0.5-6.0 Distribution_Format: HDF-EOS

Personnel

GEORGE A. RIGGS Role: INVESTIGATOR Phone: 301-614-5650 Email: George.A.Riggs at nasa.gov Contact Address: NASA Goddard Space Flight Center (GSFC) Science Systems and Applications, Inc. Code 614.1 City: Greenbelt Province or State: MD Postal Code: 20771 Country: USA

DOROTHY K. HALL Role: INVESTIGATOR Contact Address: National Aeronautics and Space Administration (NASA) Goddard Space Flight Center (GSFC) Mail stop 614.1 City: Greenbelt Province or State: MD Postal Code: 20771

VINCE V. SALOMONSON Role: INVESTIGATOR Phone: 801-585-9492 Email: vincent.salomonson at utah.edu Contact Address: University of Utah Department of Meteorology 135 S 1460 E, Rm 809 City: Salt Lake City Province or State: UT Postal Code: 84112 Country: US

NSIDC USER SERVICES Role: TECHNICAL CONTACT Phone: +1 (303) 492-6199 Fax: +1 (303) 492-2468 Email: nsidc at nsidc.org Contact Address: National Snow and Ice Data Center CIRES, 449 UCB University of Colorado City: Boulder Province or State: CO Postal Code: 80309-0449 Country: USA