Registration for ICM-12 has started


ICM-12 is now open for registration.

Due to the global Covid-19 situation, this year's meeting will be organized as a condensed, virtual meeting in the week of 16-20 November 2020. The meeting will be a 5-days series of 2 hour video conferences during which the most essential topics are discussed.


You can find some more information on the specific web page of ICM-12.

The timing of the sessions is rotating in an attempt to evenly spread the burden of unfavourable hours over all participants from various time zones. The meeting programme of the virtual ICM-12 is:

Monday 16 November 14-16 UTC:  Updates from sites
Session leads: Marion Maturilli and Dale Hurst
Key aspects include summary of site reports from Lead Centre, key common challenges from TT chairs, and new sites presentations.

Tuesday 17 November 20-22 UTC:  New GRUAN Data Products
Session lead: June Wang
Discussion of the development and certification status of new data products (Radiosondes: Modem, Meisei, Graw; GNSS, Lidar)

Wednesday 18 November 19-21 UTC:  R23 replacement
Session lead: Ruud Dirksen
Discussion of the developments regarding alternatives for R23 as a coolant for stratospheric hygrometers. Presentation of tests with dry-ice/ethanol mixture. Status overview of peltier-based instruments.

Thursday 19 November 14-16 UTC:  New science (optional)
Session lead: Peter Thorne

Friday 20 November 11-14 UTC:  RS41 product
Session lead: David Smyth
Discussion and presentation of the GRUAN Data product for the Vaisala RS41

The new science session on Thursday is optional and depends on the number of presenters. Abstracts for this session can be submitted to .

Furthermore, there is the option to set up additional meeting rooms for side meetings. Please indicate if there is a specific topic you wish to discuss during a side meeting.

The platform for the virtual meeting is goto meeting. You can test goto meeting at Connection and login details will be distributed before the start of the meeting.

To participate in ICM-12, please register by email at so that we can keep you informed about the programme and particulars of the meeting.