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.
AMT paper Calbet et al. 2017 published
GRUAN-related paper published at AMT with title "Consistency between GRUAN sondes, LBLRTM and IASI "
9th GRUAN Implementation-Coordination Meeting (ICM-9)
All presentations of the ICM-9 are now available.
GRUAN Technical Note 8 published
GRUAN Technical Note 8 (GRUAN-TN-8) published with title "GRUAN Monitor MW41 and the Vaisala RS41 Additional Sensor Interface"
New Official GRUAN Website
We proudly announce the new GRUAN website.
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 2016, GRUAN comprises of 22 sites, 9 of which have been GRUAN certified.