Dr. Petri Vaattovaara
University of Eastern Finland, Kuopio campus, Kuopio, Finland
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Petri Vaattovaara with the UFO-TDMA (ultrafine organic tandem differential mobility analyzer) on the left. This photo was taken in the marine measurement container in Wellington harbour during the set-up phase of the voygage, just before the seacontainer was lifted on board the RV Tangaroa. |
Topic: The role of organics in SOAP (Southern Ocean Aerosol Processes)
(Report)
Host: Michael Harvey,NIWA (National Institute of water & atmospheric research), New Zealand, Wellington,Wellington, New Zealand
Date of STSM: 25/01/2011 to 20/02/2011
STSM code: 7462
The motivation of this STSM is to understand more fully aerosol processes connected air-sea fluxes of biogenic compounds associated with natural plankton blooms in sparsely measured subantarctic biologically active waters. The work will be carried out in tight co-operation with a New Zealand’s research institute, NIWA and their research vessel Tangaroa in the research programme “Southern Ocean Aerosol Processes”; applying for SOLAS endorsement). A special aim is to use my (UEF, Kuopio, Finland) ultrafine organic tandem differential analyzer; e.g. ACP,5,3233-3287,2005) to study the role, presence, fraction, and fraction change of organics in newly-formed marine nucleation mode (e.g., 6-10nm, respectively) and the lower end of Aitken mode sized marine particles (e.g., 20-60nm, respectively) in order to quantify formation, growth and composition and consequently their effects on the Southern Ocean Pacific region background aerosol population, cloud condensation nuclei (CNN) and cloud microphysic properties and finally climate system. The measurements will be made in parallel with other aerosol phase (e.g., DMPS, VH-TDMA, AMS, CCNc), gas phase (e.g., DMS, halocarbons), marine biology (e.g., water properties, phytoplankton) and meteorological instrumentation (e.g., wind direction and strength, light intensity) participating to the expedition. More generally, the measurements will shed light on the role and presence of organics in ultrafine particles (d<100nm) in a southern hemisphere biologically active marine region. Overall, the expedition should provide extremely valuable information for this region and establish a new marine related co-operation (under the Cost Action). Additionally, this also provides me a great possibility to broaden my knowledge of marine research equipment.