Participation or leadership in international programmes
- Finnish national correspondent for the International Glaciological Society, since 2014
- Scientific Coordinator of the Greenland Ice Expedition 2014
- Arctic Freshwater Systems, organized by CliC/WCRP, AMAP, and IASC: Co-leader of the Atmospheric component, since 2013
- Member of the Steering Group of the International Arctic Systems for Observing the Atmosphere (IASOA), since 2012
- Arctic Return Adventure, 2012, Scientific Coordinator
- Finnish Representative in the Antarctic Sub-Group of the International Ice Charting Working Group (IICWG), since 2011
- Member of the Steering Group of the Antarctic Sea Ice Processes and Climate (AsPeCt) program under the Scientific Committee for Antarctic Research (SCAR), since 2011
- Finnish Representative in the Atmospheric Working Group of the International Arctic Science Commission (IASC), since 2010
- Member of the AMAP Expert Group for Unmanned Aerial Systems, since 2010
- Member of the Steering Group of the Second Baltex Assesment of Climate Change in the Baltic Sea Phase, BACC-II, 2009-2013
- Arctic Monitoring and Assesment Program (AMAP) SWIPA project, 2008-2012
- Member of the AMAP Climate Model Evaluation Group, 2008-2011
- Vice-Chairman of the Baltic Sea Experiment (BALTEX) under the World Climate Research Programme, 2006-2009
- Member of the Scientific Steering Group of BALTEX, 2002-2009
- Member of the Steering Group of the International Antarctic Zone Program (iAnZone), an affiliated program of SCOR, 2004-2007
- Member of the Cryosphere Theme Team of the Integrated Global Observing Strategy /IGOS), 2004-2006