Newsletter December 3/2011

December 3/2011



The last year of SNOOP project will soon start and we can be satisfied with the outcomes so far. However, there is still much to do especially in WP3 and WP4 as in both Work Packages the outcomes will be available at the last half of the project. The last Policy Forum of total three will be arranged during the last Milestone (September–December 2012) in Tallinn. We are looking forward to present you all our achievements then.


Data collection for comparisons has continued
Work Package 2 activities are coming into their end and at the end of August 2012 we should have a final report of the WP. Until then, we have still some activities to be carried out. Data collection for comparisons between model predictions and experimental measurements has continued. Due to late arrival of data from experimental measurement group and ship owners, model measurement comparisons are in progress but could not be completed, yet. We have discussed with Finnish ship owners association and Trafi how to improve data collection and updated our knowledge on international regulations concerning ships exhaust emissions. All this is particularly quality control work for the emission modelling and estimations but also for future scenarios' background data.


Model runs with ship deposition data continue
We have performed model runs with ship deposition data. The increase of NOx pool in seawater and increase of marine biological production due NOx deposition from the ship emission is quantified in comparison to reference conditions. The areal zonation of the impact is categorized as low, medium and high. We have started to summarize the estimates of ship exhaust gas emissions on marine environment. During the following months we will conduct further comparison between NOx process description in the biochemical model and results of the laboratory experiments.


Air quality measurements have continued
The measurement system for the measurement campaign for deposition of gaseous compounds (SO2, NO, NO2, O3 and CO2) was installed at the isle of Harmaja at the beginning of June. The measurement campaign continued to the middle of October. The measurement system was extended from the previous measurement campaign at Aegna by direct flux measurements of carbon dioxide by eddy covariance technique. In addition also particle size distributions at two different heights were measured with ELPI impactor.

Air quality measurements have been continued in Helsinki, Turku and Tallinn. In Helsinki harbour area air quality data has continued and real time air quality data is available at HSY’s internet pages. In Turku exposure estimation for SO2, NO2 and PM2.5 have been computed. The second summer measurement campaign by the mobile laboratory van Sniffer was performed in the Helsinki port areas as well as near the Turku port area and we have been performing analysis of the results of the campaign. The measured parameters were CO, CO2, NO, NO2, NOx, SO2, PM2.5, PM10, particle number size distribution and total number concentration. The measurement techniques were further developed, and the volatility properties of particles were studied by a thermodenuder. Data analysis from the previous campaigns has been continued, and fuel sulphur contents and emission factors of the ships were calculated. During summer particle number concentration was measured at two altitudes in the Harmaja island to obtain information on the emission fluxes of the ships passing the island.