The Comprehensive Historical Upper Air Network

The Comprehensive Historical Upper-Air Network (CHUAN) represents a global, historical upper-air dataset that has been derived from heterogeneous data available from various sources, including newly digitized data. The data have been derived from radiosondes, pilot balloons, registering balloons and kites and has been subjected to a systematic quality assessment. CHUAN has focused on collecting data for pre-1957 .

This product is the "V1.7" corrected (quality controlled) data with no bias or radiation correction applied ("CDC" in CHUAN documentation).  There are other products available in "V1.7", like corrected data with bias and radiation corrections and the raw (non quality controlled) soundings, along with others, that are not available at this time.

A new version is expected to be available in mid 2014.

To Access Resource:

Questions? Email Resource Support Contact:

  • datahelp@ucar.edu

Temporal Range

  • Begin:  1904-01-01
    End:  2007-03-27

Keywords

Resource Type dataset
Temporal Range Begin 1904-01-01
Temporal Range End 2007-03-27
Temporal Resolution N/A
Bounding Box North Lat N/A
Bounding Box South Lat N/A
Bounding Box West Long N/A
Bounding Box East Long N/A
Spatial Representation N/A
Spatial Resolution N/A
Related Links

Related Resource #1 : Comprehensive Historical Upper-Air Network Data from the University of Bern
Additional Information N/A
Resource Format ASCII
Standardized Resource Format ASCII
Asset Size 17745.701 MB
Legal Constraints

Creative Commons Attribution 4.0 International License
Access Constraints None
Software Implementation Language N/A

Resource Support Name N/A
Resource Support Email datahelp@ucar.edu
Resource Support Organization N/A
Distributor NSF NCAR Geoscience Data Exchange
Metadata Contact Name N/A
Metadata Contact Email datahelp@ucar.edu
Metadata Contact Organization NSF NCAR Geoscience Data Exchange

Author Bronnimann, Stefan
Stickler, Alexander
Publisher NSF National Center for Atmospheric Research
Publication Date 2013-11-21
Digital Object Identifier (DOI) https://doi.org/10.5065/AHPM-FC10
Alternate Identifier d352000
Resource Version N/A
Topic Category climatologyMeteorologyAtmosphere
Progress completed
Metadata Date 2025-10-09T01:31:00Z
Metadata Record Identifier edu.ucar.gdex::d352000
Metadata Language eng; USA
Suggested Citation Bronnimann, Stefan, Stickler, Alexander. (2013). The Comprehensive Historical Upper Air Network. NSF National Center for Atmospheric Research. https://doi.org/10.5065/AHPM-FC10. Accessed 23 October 2025.

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