Integrated Global Radiosonde Archive (IGRA) - Monthly Means (DSI-6352)
Entry ID: gov.noaa.ncdc.C00617

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Summary
Abstract: Integrated Global Radiosonde Archive is a digital data set archived at the National Climatic Data Center (NCDC). This dataset contains monthly means of geopotential height, temperature, zonal wind, and meridional wind derived from the Integrated Global Radiosonde Archive (IGRA, DSI-6351). IGRA consists of radiosonde and pilot balloon observations at over 1500 globally distributed stations, and monthly means are available for the surface and mandatory levels at many of these stations. The period of record varies from station to station, with many extending from 1970 to present. Monthly means are computed separately for the nominal times of 0000 and 1200 UTC, considering data within two hours of each nominal time. A mean is provided, along with the number of values used to calculate it, whenever there are at least 10 values for a particular station, month, nominal time, and level. The monthly-mean files are updated on the fifth day of each month and are available online at no charge.

Purpose: To make a wide range of climatic data available to researchers and the public.

SUPPLEMENTAL INFORMATION: data set

Pricing is dependent on customer order specifications. Please contact NCDC for information on fees and terms for retreiving the Data Set or Product.

CURRENTNESS REFERENCE: Ground Condition

Related URL
Link: GET DATA
Description: Data from the Integrated Global Radiosonde Archive can be accessed using FTP and HTTP access methods.


Link: GET DATA


Link: VIEW EXTENDED METADATA
Description: View Source Metadata document from the Metadata Manager and Repository (NMMR).


Link: VIEW RELATED INFORMATION


Link: VIEW RELATED INFORMATION


Geographic Coverage
 N: 90.0 S: -90.0  E: 180.0  W: -180.0

Data Set Citation
Dataset Originator/Creator: National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
Dataset Title: Integrated Global Radiosonde Archive (IGRA) - Monthly Means (DSI-6352)
Dataset Release Date: Unknown
Data Presentation Form: tabular digital data
Online Resource: http://www.ncdc.noaa.gov/oa/cab/igra/index.php


Temporal Coverage
Start Date: 1947-01-01


Location Keywords
GEOGRAPHIC REGION > GLOBAL


Data Resolution
Temporal Resolution: Monthly


Science Keywords
ATMOSPHERE >ALTITUDE >GEOPOTENTIAL HEIGHT    [Definition]
ATMOSPHERE >ALTITUDE >TROPOPAUSE    [Definition]
ATMOSPHERE >ATMOSPHERIC PRESSURE >PRESSURE TENDENCY    [Definition]
ATMOSPHERE >ATMOSPHERIC PRESSURE >SURFACE PRESSURE    [Definition]
ATMOSPHERE >ATMOSPHERIC PRESSURE >ATMOSPHERIC PRESSURE MEASUREMENTS    [Definition]
ATMOSPHERE >ATMOSPHERIC TEMPERATURE >AIR TEMPERATURE    [Definition]
ATMOSPHERE >ATMOSPHERIC TEMPERATURE >SURFACE AIR TEMPERATURE    [Definition]
ATMOSPHERE >ATMOSPHERIC TEMPERATURE >TEMPERATURE TENDENCY    [Definition]
ATMOSPHERE >ATMOSPHERIC WATER VAPOR >DEW POINT TEMPERATURE    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >SURFACE WINDS    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >UPPER LEVEL WINDS    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >WIND TENDENCY    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >WIND PROFILES    [Definition]
ATMOSPHERE >ATMOSPHERIC TEMPERATURE >DEW POINT TEMPERATURE    [Definition]


ISO Topic Category
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
ELEVATION


Platform
RADIOSONDES    [Information]


Instrument
RADIOSONDES    [Information]


Project
ESIP >Earth Science Information Partners Program    [Information]


Quality
ATTRIBUTE ACCURACY REPORT: Quality control procedures have been applied to the individual soundings from which the monthly means were computed. No additional quality control has been applied to the monthly means. The IGRA quality assurance system consists of a series of specialized algorithms that are applied successively. The procedures can be grouped into seven general categories: fundamental "sanity" checks, checks on the plausibility and temporal consistency of surface elevation, internal consistency checks, checks for the repetition of values, climatologically- based checks, checks on the vertical and temporal consistency of temperature, and data completeness checks (Durre et al. 2006). Each successive check makes a binary decision on the quality of a value, level, or sounding; either the data item passes the check and remains available, or it is identified as erroneous and thus set to missing. Although all variables are quality-assured, temperature, pressure, and geopotential height receive somewhat greater scrutiny than the other variables.

LOGICAL CONSISTENCY REPORT: Unknown

COMPLETENESS REPORT: The following data problems in the individual soundings might also be reflected in the monthly means and will be addressed at the time of future enhancements of IGRA: a. Geopotential heights prior to 1950 at some Russian stations were expressed in geometric meters rather than geopotential meters in the relevant source dataset (DSI-6310). b. At certain stations during certain months, wind speed may be incorrectly reported in knots or in hundredths of meters per second. For the most up-to-date information on the status of the dataset, see the status report at www1.ncdc.noaa.gov/pub/data/igra/status.txt.

LINEAGE/PROCESS STEP:
PROCESS DESCRIPTION: Individual IGRA soundings are available in Integrated Global Radiosonde Archive DSI-6351 (C00616).
PROCESS DATE: Unknown


Access Constraints
ACCESS CONSTRAINTS: None

DISTRIBUTION LIABILITY: Every effort has been made to ensure that these data are accurate and reliable within the limits of current NOAA quality control procedures. NOAA can only certify that the data provided to its customers is an authentic copy of the records which were accepted for inclusion in NOAA archives. NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.


Use Constraints
None


Keywords
GLOBAL
GOSIC
G3OS/


Data Set Progress
IN WORK


Data Center
National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce    [Information]
Data Center URL: http://www.ncdc.noaa.gov/
Dataset ID: ______DSI-6352 ____

Data Center Personnel
Name: NCDC CUSTOMER SERVICE
Phone: 828-271-4800
Fax: 828-271-4876
Email: ncdc.orders at noaa.gov
Contact Address:
151 Patton Avenue, Room 120
City: Asheville
Province or State: NC
Postal Code: 28801-5001
Country: USA



Distribution
Distribution_Format: ASCII and GIF Files
Fees: Please see summary


Personnel
NCDC METADATA SERVICES
Role: DIF AUTHOR
Phone: 828-271-4800
Fax: 828-271-4876
Email: ncdc.metadata at noaa.gov
Contact Address:
151 Patton Avenue
Room 468
City: Asheville
Province or State: North Carolina
Postal Code: 28801-5001
Country: USA



Creation and Review Dates
DIF Creation Date: 2006-06-27
Last DIF Revision Date: 2011-07-21

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