Wednesday, February 8, 2017 -
09:00 to 10:00


-          CATCH presentation (Jennie Thomas) – 20min

-          Aerosol WG prospectus and science questions (ALL) – 30min


IASOA Aerosol Working Group

February 8, 2017


Attendees: Sara Crepinsek, Eija Asmi, Jo Browse, Jennie Thomas, Allison McComiskey, John Ogren, John Backman, Markus Fiebig, Rebecca Sheesley, Bill Simpson, Patrick Hayes, Kerri Pratt, Kostas Eleftheriadis


Role Call of group members

CATCH: The Cryosphere and ATmostpheric CHemistry presentation by Jennie Thomas (Jen Murphy, Kerri Pratt) – IGAC & SOLAS emerging activity, scientists engaged in helping to plan CATCH, IGAC core activities and sustainability connections, past activities sponsored by IGAC: Air Ice Chemical Interactions (AICI) and Ocean Atmosphere Sea Ice Snowpack (OASiS) and Halogens in the Troposphere (HitT), the CATCH mission: to facilitate atmospheric chemistry research within the international community with a focus on natural processes specific to the cryosphere and cold regions of the Earth and how these processes are linked to global environmental change, research in cold and Polar regions is inherently international requiring cooperation among researchers and programs across national boundaries to achieve science objectives, CATCH focuses on processes occurring at snow and ice interfaces, oceanic surfaces, as well as aerosol and clouds in cold regions, as well as other to be determined areas of research, shared activities: IASOA, PACES, PAGES, CLiC, SOLAS, BEPSII, can learn more about CATCH:, link to CATCH mission and vision statements also available on IASOA webpage, CATCH is currently seeking community input, attend the first CATCH community workshop on April 19-20 near Paris, France, some financial aid for participants (early career scientists), workshop science themes to be put on IASOA webpage, CATCH newsletter available, two CATCH sessions at EGU 2017, some MOSAiC folks coming to CATCH workshop, IASOA can work toward involving more academic researchers and CATCH can help in this role, there is funding for young scientists to attend workshop, submit abstracts at Committee Meeting links:

CATCH (find out more):



Community meeting:

Community input survey:

Draft mission & vision:


Discussion of Aerosol Working Group Science Questions

- Questions should require pan-Arctic observations of a combination of aerosol chemical, physical, optical, and microphysical properties

 1) What are the major sources and sinks of Arctic aerosols over the different seasons? 2) What role do aerosols have in modulating Arctic cloud properties and surface energy? 3) What is the vertical distribution of Arctic aerosols and how does this change over the course of the year? (Creamean)

- Previous questions focus on black carbon and not much else, should expand these questions to include other aerosol processes (and differences between affect and effect), understanding transport processes, interactions with clouds, aerosol chemistry in the Arctic, understanding at a process level (McComiskey/Ogren)

- Expand on old question (How does black carbon affect the persistence and radiative effect of clouds in the Arctic?) and focus on vertical distributions compared to horizontal distributions to complete a better picture of the Arctic, inhomogeneity in Arctic aerosols (Ogren)

- Question to understand changes and impacts in aerosol sources and life cycles due to changes sea-ice surface (Pratt, Browse)

- Question of how collected observations can better serve modelers (Browse)

- Focus on secondary aerosols also (biogenic, fossil emissions, trace gas emissions)

- What is the origin of mechanism that lead to new particle formation (natural sources, particle formation) (Eleftheriadis)

- Creamean Q1 (What are the major sources and sinks of Arctic aerosols over the different seasons?) should be more specific, there are questions underneath this larger question that should be answered (Simpson)

- Technical question: biases of aerosol collection in Arctic temperatures compared to those represented in temperature controlled labs, how does this bias the chemistry of the aerosol collected? (Ogren)

- Can use a field campaign to analyze Ogren question above (Pratt)

- To put long term measurements in context, should quantify sources of aerosols under Q1 by Creamean, make sure we aren’t missing any sources under certain conditions (Pratt)


Action Items:

  • Add CATCH info to IASOA webpage (Crepinsek)
  • Contact Chuck Brock for presentation at next meeting (Crepinsek, Creamean)
  • Continue science question discussion via email (ALL)
Research Group: