GCOS Reference Upper-Air Network
The climate reference network
The Global Climate Observing System (GCOS) Reference Upper-Air Network (GRUAN) is an international reference observing network of sites measuring essential climate variables above Earth's surface, designed to fill an important gap in the current global observing system. GRUAN measurements are providing long-term, high-quality climate data records from the surface, through the troposphere, and into the stratosphere. These are being used to determine trends, constrain and calibrate data from more spatially‐comprehensive observing systems (including satellites and current radiosonde networks), and provide appropriate data for studying atmospheric processes. GRUAN is envisaged as a global network of eventually 30-40 sites that, to the extent possible, builds on existing observational networks and capabilities.
GRUAN promotional video
This video provides an excellent overview of the goals and principles of GRUAN and its relation to the current challenges in climate research. You can find this and other public outreach material here.
GRUAN Technical Document 5 has been published
We are pleased to announce that GRUAN Technical Document 5 (GRUAN-TD-5) 'Characteristics and data processing for the Meisei RS-11G and iMS-100...
ICM-10: 23-27 April 2018 in Potsdam
The 10th GRUAN annual Implementation and Coordination Meeting, ICM-10, will be organized 23-27 April 2018.
ACP paper Brunamonti et al. 2018 in review
The following GRUAN-relevant paper was published at ACP:
“Balloon-borne measurements of temperature, water vapor, ozone and aerosol backscatter at...
ESSD paper Tradowsky et al. 2018 in review
The following GRUAN-relevant paper was published at ESSD:
“Combining Data from the Distributed GRUAN Site Lauder-Invercargill, New Zealand, to...
Status of GRUAN sites
GRUAN is envisaged as a global network of eventually 30-40 measurement sites. To the extent possible, it builds on existing observational networks and capabilities. As at the end of 2017, GRUAN comprises of 26 sites, 9 of which have been GRUAN certified.
Status of data flow
A comprehensive volume of measurement data has been collected by GRUAN since 2008. The archive includes raw data and related meta-data. For the Vaisala RS92 radiosonde, the first GRUAN Data Product (GDP) has been fully implemented and available since 2012. Further GDPs are in certification process or under development.