The TRMM Composite Climatology (TCC) of Tropical Rainfall

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Dr. Robert F. Adler, ESSIC/UMD
Publication_Date: September 2010
Title: The TRMM Composite Climatology (TCC) of Tropical Rainfall
Edition: 6
Geospatial_Data_Presentation_Form:
Series_Information:
Series_Name:
Issue_Identification:
Publication_Information:
Publication_Place:
Publisher: NASA GES DISC
Other_Citation_Details:
Online_Linkage: http://disc.sci.gsfc.nasa.gov/daac-bin/tcc.pl
Description:
Abstract:
The TRMM Composite Climatology (TCC) is a climatology (or map of mean values) of surface precipitation based on 13 years of data from the Tropical Rainfall Measuring Mission (TRMM). The TCC takes advantage of the information from multiple estimates of precipitation from TRMM to construct mean value maps over the tropics (36°N - 36°S) for each month of the year at 0.5° latitude-longitude resolution. The first-time use of both active and passive microwave instruments on board TRMM has made it the foremost satellite for the study of precipitation in the tropics and has led to a better understanding of the underlying physics and distribution of precipitation in this region. The TCC utilizes the TRMM multiple estimates to provide an answer to the overarching goal of TRMM: How much rain is falling in the Tropics? The TCC also includes estimates of the error for the mean values, constructed from a calculation of the variation among the input estimates. It is hoped that this new climatology will be useful to the user community as a ready comparison with other non-TRMM analyses and for comparison with numerical models, including those used for retrospective “re-analysis” and for climate simulations. It should also be useful as an educational reference for understanding tropical rainfall. One of the main goals of the Tropical Rainfall Measuring Mission (TRMM) has been to accurately define the climatological surface rainfall in the tropics. This TRMM Composite Climatology (TCC) consists of a merger of selected TRMM rainfall products over both land and ocean to give a "TRMM-best” climatological estimate. Inputs to the composite were selected based on knowledge of the performance of the retrievals, limitations of the algorithms, and the presence of artifacts. Over ocean the rainfall estimates used for the TCC are from TMI (2A12), PR (2A25,near surface) and combined TMI-PR (2B31). Over land the rainfall estimates from the TRMM Multi-satellite Precipitation Analysis (TMPA, 3B43) are used to replace those from the TMI, because the land estimates from 2A12 (Version 6) are known to overestimate surface rainfall during the warm season. Other adjustments or quality control steps are taken, including adjusting the post-boost PR data to match the pre-boost (more sensitive) PR retrievals and eliminating small artifacts related to coastlines and islands. Maps of month-of-the-year climatologies of all four products (including adjustments and quality control steps) are then calculated at 0.5° latitude-longitude resolution from 36°N to 36°S, using twelve years (1998-2009) of TRMM V6 data. A simple mean of the three products (a different set of three over land and ocean) produces the final TCC estimate. In addition to the mean precipitation estimates, the TCC includes the variation among the three estimates (in terms of the standard deviation,σ) at each point to give an estimate of the error in the estimated mean value, at least in a relative sense. Details of the procedure and results and comparison with other data sets can be found in the reference below. There are 78 data files in this TCC data directory: 13 each (annual and month-of-year) for 2A12, 2A25, 2B31, 3B43, TCC, and standard deviation of TCC. The file name means: type.month.TRMMversion.bin. Each file is one grid, and the grid is 0.5 degree. The data are from west to east starting from 0.25E (720 grids), and north to south starting from 35.75N (144 grids). Thirteen GIF files of TCC rainfall (12 months and annual mean) as well as a README file to help users reading the data are also included The preceding text written in September 2010. Reference: Adler, R. F., J.-J. Wang, G. Gu, and George J. Huffman, 2009: A ten-year tropical rainfall climatology based on a composite of TRMM products. J. Meteorol. Soc. Japan, 87A, 281-293. This article can be downloaded from the journal website http://www.jstage.jst.go.jp/browse/jmsj/87A/0/_contents README: http://disc.sci.gsfc.nasa.gov/additional/faq/precipitation_faq.shtml#TCC
Purpose:
Not Available
Supplemental_Information:
REFERENCE: Adler, R. F., J.-J. Wang, G. Gu, and George J. Huffman 2009 A ten-year tropical rainfall climatology based on a composite of TRMM products J. Meteorol. Soc. Japan 87A 281-293
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: Not Available
East_Bounding_Coordinate: Not Available
North_Bounding_Coordinate: Not Available
South_Bounding_Coordinate: Not Available
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: GCMD PLATFORM
Theme_Keyword_Thesaurus: GCMD INSTRUMENT
Theme_Keyword_Thesaurus: PROJECT
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword_Thesaurus: DATA SET LANGUAGE
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > PRECIPITATION > PRECIPITATION AMOUNT
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > PRECIPITATION > PRECIPITATION RATE
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > PRECIPITATION > RAIN
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > PRECIPITATION
Theme_Keyword: TRMM > TROPICAL RAINFALL MEASURING MISSION
Theme_Keyword: RAIN GAUGES
Theme_Keyword: PR > TRMM PRECIPITATION RADAR
Theme_Keyword: TMI > TRMM MICROWAVE IMAGER
Theme_Keyword: VIRS > TRMM VISIBLE INFRARED SCANNER
Theme_Keyword: EOSDIS > EARTH OBSERVING SYSTEM DATA INFORMATION SYSTEM
Theme_Keyword: ESIP > EARTH SCIENCE INFORMATION PARTNERS PROGRAM
Theme_Keyword: TRMM > TROPICAL RAINFALL MEASURING MISSION PROJECT
Theme_Keyword: CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
Theme_Keyword: ENGLISH
Access_Constraints: None
Use_Constraints:
1) Data acknowledgement: Adler, R. F., J.-J. Wang, G. Gu, and George J. Huffman, 2009: A ten-year tropical rainfall climatology based on a composite of TRMM products. J. Meteorol. Soc. Japan, 87A, 281-293. 2) Visualization tool acknowledgement: “Analyses and visualizations used in this [study/paper/presentation] were produced with the TCC online data system, developed and maintained by the NASA GES DISC."
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: GES DISC HELP DESK SUPPORT GROUP
Contact_Position: TECHNICAL CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Goddard Earth Sciences Data and Information Services Center
Address: Code 610.2
Address: NASA Goddard Space Flight Center
City: Greenbelt
State_or_Province: MD
Postal_Code: 20771
Country: USA
Contact_Voice_Telephone: 301-614-5224
Contact_Facsimile_Telephone: 301-614-5268
Contact_Electronic_Mail_Address: gsfc-help-disc@lists.nasa.gov
Browse_Graphic:
Browse_Graphic_File_Name: ftp://disc2.nascom.nasa.gov/data/TRMM/Gridded/TRMM_TCC/TCC.07.6.gif
Browse_Graphic_File_Description:
TRMM Composite Climatology (July, 1998 - 2009)
Browse_Graphic_File_Type: GIF
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
To be provided, or contact Dr. Robert Adler (radler@umd.edu) for details.
Logical_Consistency_Report:
Not Available
Completeness_Report:
Not Available
Lineage:
Process_Step:
Process_Description:
Not Available
Process_Date: Unknown
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Spatial_Reference_Information:
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NASA/GSFC/SED/ESD/GCDC/GESDISC > Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA
Contact_Person: GES DISC HELP DESK SUPPORT GROUP
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Goddard Earth Sciences Data and Information Services Center
Address: Code 610.2
Address: NASA Goddard Space Flight Center
City: Greenbelt
State_or_Province: MD
Postal_Code: 20771
Country: USA
Contact_Voice_Telephone: 301-614-5224
Contact_Facsimile_Telephone: 301-614-5268
Contact_Electronic_Mail_Address: gsfc-help-disc@lists.nasa.gov
Resource_Description: GES_DISC_TRMM_TCC_V6
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: flat binary
Transfer_Size: Average file size: ~0.4 MB
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://disc.gsfc.nasa.gov/
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
ftp://disc2.nascom.nasa.gov/data/TRMM/Gridded/TRMM...
Access_Instructions:
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://mirador.gsfc.nasa.gov/
Access_Instructions:
Mirador is a simplified interface for searching, browsing, and ordering Earth science data at NASA Goddard Earth Sciences Data and Information Services Center (GES DISC). Mirador is designed to be fast and easy to learn.
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://disc.sci.gsfc.nasa.gov/daac-bin/tcc.pl
Access_Instructions:
This tool is a prototype that allows visualization of the entire product suite with overlay of different parameters. Additional functions allow plotting scatter diagrams, time series, etc. See the FAQ for further usage on this tool. Questions and comments can be sent to gsfc-help-disc@lists.nasa.gov. The data will be ingested into the permanent archive and provided through our Mirador and other services here at the GES DISC, but can be accessed in a temporary ftp location until then at ftp://disc2.nascom.nasa.gov/data/TRMM/Gridded/TRMM_TCC.
Fees: None
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Metadata_Reference_Information:
Metadata_Date: 20120322
Metadata_Review_Date: 20130429
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: GCMD User Support Office
Contact_Organization: NASA Global Change Master Directory
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Not Available
City: Lanham
State_or_Province: MD
Postal_Code: 20706
Country: USA
Contact_Voice_Telephone: Not Available
Contact_Electronic_Mail_Address: gcmduso@gcmd.gsfc.nasa.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
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