Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2018-524 Manuscript under review for journal Atmos. Chem. Phys. Discussion started: 21 June 2018 c Author(s) 2018. CC BY 4.0 License. 1 Towards the Marine Arctic Component of the Pan-Eurasian Experiment Timo Vihma1, Petteri Uotila2, Stein Sandven3, Dmitry Pozdnyakov4, Alexander Makshtas5, Alexander Pelyasov6, Roberta Pirazzini1, Finn Danielsen7, Sergey Chalov8, Hanna K. Lappalainen2,9, Vladimir 5 Ivanov5,8,10, Ivan Frolov5, Anna Albin7, Bin Cheng1, Sergey Dobrolyubov8, Viktor Arkhipkin8, Stanislav Mуslenkov8, Tuukka Petäjä2,9, Markku Kulmala2,9 1Finnish Meteorological Institute, Helsinki, Finland 2Institute for Atmospheric and Earth System Research/Physics, University of Helsinki, Finland 10 3Nansen Environmental and Remote Sensing Centre, Bergen, Norway 4Nansen International Environmental and Remote Sensing Centre, St. Petersburg, Russia 5Arctic and Antarctic Research Institute, St. Petersburg, Russia 6Center for the Arctic and Northern Economies, Council for Research for Productive Forces, Moscow 7Nordic Foundation for Development and Ecology, Copenhagen, Denmark 15 8Moscow State University, Moscow, Russia 9Tyumen State University, Tyumen, Russia 10Hydrometeorological Center of Russian Federation, Moscow, Russia Correspondence to: Timo Vihma (
[email protected]) Abstract. The Arctic marine climate system is changing rapidly, seen as warming of the ocean and atmosphere, decline of sea 20 ice cover, increase in river discharge, acidification of the ocean, and changes in marine ecosystems. Socio-economic activities in the coastal and marine Arctic are simultaneously changing. This calls for establishment of a marine Arctic component of the Pan-Eurasian Experiment (MA-PEEX). There is a need for more in-situ observations on the marine atmosphere, sea ice, and ocean, but increasing the amount of such observations is a pronounced technological and logistical challenge.