Integrated Global Radiosonde Archive (IGRA) - Monthly Means (DSI-6352)Entry ID: gov.noaa.ncdc.C00617
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
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 dataOnline Resource: http://www.ncdc.noaa.gov/oa/cab/igra/index.php
Start Date: 1947-01-01
Temporal Resolution: Monthly
Temporal Resolution Range: Monthly - < Annual
ATMOSPHERE > ALTITUDE > GEOPOTENTIAL HEIGHT
ATMOSPHERE > ALTITUDE > TROPOPAUSE
ATMOSPHERE > ATMOSPHERIC PRESSURE > PRESSURE TENDENCY
ATMOSPHERE > ATMOSPHERIC PRESSURE > SURFACE PRESSURE
ATMOSPHERE > ATMOSPHERIC PRESSURE > ATMOSPHERIC PRESSURE MEASUREMENTS
ATMOSPHERE > ATMOSPHERIC TEMPERATURE > AIR TEMPERATURE
ATMOSPHERE > ATMOSPHERIC TEMPERATURE > SURFACE AIR TEMPERATURE
ATMOSPHERE > ATMOSPHERIC TEMPERATURE > TEMPERATURE TENDENCY
ATMOSPHERE > ATMOSPHERIC WATER VAPOR > DEW POINT TEMPERATURE
ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS
ATMOSPHERE > ATMOSPHERIC WINDS > UPPER LEVEL WINDS
ATMOSPHERE > ATMOSPHERIC WINDS > WIND TENDENCY
ATMOSPHERE > ATMOSPHERIC WINDS > WIND PROFILES
ATMOSPHERE > ATMOSPHERIC TEMPERATURE > DEW POINT TEMPERATURE
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.
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
Data Set Progress
Distribution Format: ASCII and GIF Files
Fees: Please see summary
Role: DIF AUTHOR
Email: ncdc.metadata at noaa.gov
151 Patton Avenue Room 468
Province or State: North Carolina
Postal Code: 28801-5001
Creation and Review Dates
DIF Creation Date: 2006-06-27
Last DIF Revision Date: 2011-07-21