Integrated Global Radiosonde Archive (IGRA) (DSI-6351)Entry ID: gov.noaa.ncdc.C00616
Abstract: Integrated Global Radiosonde Archive is a digital data set archived at the National Climatic Data Center (NCDC). The Integrated Global Radiosonde Archive (IGRA) consists of radiosonde and pilot balloon observations at over 1500 globally distributed stations. Observations are available for standard, surface, tropopause and significant levels. Variables include: Pressure Temperature Geopotential Height Dewpoint Depression Wind Direction Wind Speed The period of record varies from station to station, with many extending from 1970 to present. Station records are updated daily and are available online at no charge. IGRA data originate from 11 different sources and have passed through a set of rigorous quality assurance procedures.
Purpose: To make a wide range of climatic data available to researchers and the public.
SUPPLEMENTAL INFORMATION: data set
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) (DSI-6351)
Dataset Release Date: Unknown
Data Presentation Form: tabular digital dataOnline Resource: http://www.ncdc.noaa.gov/oa/cab/igra/index.php
Start Date: 1938-01-01
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 > FLIGHT LEVEL WINDS
ATMOSPHERE > ATMOSPHERIC WINDS > WIND PROFILES
ATMOSPHERE > ATMOSPHERIC TEMPERATURE > DEW POINT TEMPERATURE
Quality ATTRIBUTE ACCURACY REPORT: 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 have come to our attention and will be addressed during future enhancements of the IGRA quality-control system: a. Geopotential heights prior to 1950 at some Russian stations were expressed in geometric meters rather than geopotential meters in the relevant source dataset Global Upper Air CARDS DSI-6310 (C00553). b. At certain stations during certain months, wind speed may be incorrectly reported in knots or in hundredths of meters per second. c. The level indicators identifying tropopause levels should be used with caution since these identifications have not been quality-controlled, but occasionally have suspicious characteristics. For example, there are cases in which levels in the lower troposphere or middle to upper stratosphere are identified as tropopause levels. 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: Monthly means computed from IGRA are available in Integrated Global Radiosonde Archive Monthly Means DSI-6352 (C00617).
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
Role: DIF AUTHOR
Email: ncdc.orders at noaa.gov
151 Patton Avenue, Room 120
Province or State: NC
Postal Code: 28801-5001
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2006-06-27
Last DIF Revision Date: 2011-07-21