Publikasjoner

Evaluating a forecast system for long-range atmospheric transport episodes of POPs. NILU PP

Halse, A.K.; Eckhardt, S.; Schlabach, M.; Stohl, A.; Breivik, K.

Background air measurements of persistent organic pollutants (POPs) within existing monitoring programs are typically conducted by use of active air samplers (AAS), but the high cost of AAS limits their spatial and temporal coverage. Sampling at many such sites furthermore occurs at fixed intervals (e.g. one day per week) without any a priori consideration of air mass transport (i.e., whether the air is likely to be polluted or not). While the current strategy is appropriate for the purpose of assessing long-term trends (years, decades), the fixed interval non-continuous sampling approach is at risk of missing out key long-range atmospheric transport (LRAT) episodes. The objectives of this study have been to (i) develop a forecast system using the Lagrangian transport model FLEXPART to predict long-range atmospheric transport episodes of POPs using PCB-28 as a model compound, (ii) to evaluate the capability of the forecast system to capture specific LRAT events at a background site in southern Norway (Birkenes) through targeted sampling (i.e. when LRAT events are predicted), (iii) to assess whether predicted LRAT events for PCB-28 coincide with elevated concentrations of additional PCBs and other POPs, and (iv) to identify source regions of POPs during individual episodes. The system has been initially evaluated by comparing targeted samples collected over 12 to 25 hours during individual LRAT episodes, with monitoring samples regularly collected over one day per week throughout 2011. The FLEXPART model was clearly successful in identifying LRAT episodes for both PCB-28 and other PCBs. The model fails to accurately reproduce the magnitude of PCB-28 concentrations during individual episodes, but this can be mainly attributed to uncertainties in the absolute emission rates of PCB-28 used to drive simulations. We conclude that forecasting of pollution episodes has the potential to add value to relevant monitoring efforts which are normally collecting active air samples at fixed intervals in a non-continuous manner. Observations targeted at strong pollution episodes (as in this study) or on transport from specific source regions with highly uncertain emissions (as could be done in a very similar forecasting framework) could significantly enhance our understanding of POP sources.

Positive vs. false detection: A comparison of analytical methods and performance for analysis of cyclic volatile methylsiloxanes (cVMS) in environmental samples from remote regions.

Warner, N.A.; Kozerski, G.; Durham, J.; Koerner, M.; Gerhards, R.; Campbell, R.; McNett, D.A.

A proposed web-based tool for active commuters to mitigate their exposure to particulate matter in urban environments; a component of the CITI-SENSE Barcelona case study.

Cole-Hunter, T.; Williams, M.; Fernandez, A.; Cirach, M.; Turco, E.; Bartonova, A.; Nieuwenhuijsen, M.

Grenseområdene Norge-Russland. Luft- og nedbørkvalitet, april 2012 - mars 2013. NILU OR

Berglen, T.F.; Dauge, F.; Andresen, E.; Haugsbakk, I.; Nilsson, L.O.; Ofstad, T.; Tønnesen, D.; Vadset, M.; Våler, R.L.

Smelteverkene på russisk side av den norsk-russiske grense slipper ut store mengder svoveldioksid (SO2) og tungmetaller. Dette gir forhøyede konsentrasjoner også på norsk side. Denne rapporten inngår i kartlegging av miljøbelastningen i grenseområdene og omfatter målinger av luftkvalitet, nedbørkvalitet og meteorologi.

A global satellite-based trend analysis of tropospheric nitrogen dioxide. NILU F

Schneider, P.; van der A, R.; Valdebenito, A.

Perfluorinated alkyl substances, chloroparaffins and BFRS in soil, sediments and terrestrial/marine biota in Norway and the Arctic. NILU F

Harju, M.; Herzke, D.; Katsoyiannis, A.; Borgen, A.; Sagerup, K.; Gabrielsen, G.W.

Four-dimensional distribution of the 2010 Eyjafjallajökull volcanic cloud over Europe observed by EARLINET.

Pappalardo, G.; Mona, L.; D'Amico, G.; Wandinger, U.; Adam, M.; Amodeo, A.; Ansmann, A.; Apituley, A.; Alados Arboledas, L.; Balis, D.; Boselli, A.; Bravo-Aranda, J. A.; Chaikovsky, A.; Comeron, A.; Cuesta, J.; De Tomasi, F.; Freudenthaler, V.; Gausa, M.; Giannakaki, E.; Giehl, H.; Giunta, A.; Grigorov, I.; Groß, S.; Haeffelin, M.; Hiebsch, A.; Iarlori, M.; Lange, D.; Linné, H.; Madonna, F.; Mattis, I.; Mamouri, R.-E.; McAuliffe, M. A. P.; Mitev, V.; Molero, F.; Navas-Guzman, F.; Nicolae, D.; Papayannis, A.; Perrone, M. R.; Pietras, C.; Pietruczuk, A.; Pisani, G.; Preißler, J.; Pujadas, M.; Rizi, V.; Ruth, A. A.; Schmidt, J.; Schnell, F.; Seifert, P.; Serikov, I.; Sicard, M.; Simeonov, V.; Spinelli, N.; Stebel, K.; Tesche, M.; Trickl, T.; Wang, X.; Wagner, F.; Wiegner, M.; Wilson, K. M.

Participatory sensing for improving quality of life: CITI-SENSE current status and future plans.

Liu, H.-Y.; Bartonova, A.; CITI-SENSE Consortium.

Regional inversion of CO2 ecosystem fluxes from atmospheric measurements: reliability of the uncertainty estimates.

Broquet, G.; Chevallier, F.; Bréon, F.-M.; Kadygrov, N.; Alemanno, M.; Apadula, F.; Hammer, S.; Haszpra, L.; Meinhardt, F.; Morguí, J.A.; Necki, J.; Piacentino, S.; Ramonet, M.; Schmidt, M.; Thompson, R.L.; Vermeulen, A.T.; Yver, C.; Ciais, P.

Ozone measurements 2011. EMEP/CCC

Hjellbrekke, A.-G.; Solberg, S.; Fjæraa, A.M.

Estimation of diurnal variability. NILU F

Griesfeller, A.; Lahoz, W.

Number concentration and modal Structure of indoor/outdoor fine particles in four European Cities. NILU F

Lazaridis, M.; Eleftheriadis, K.; Ždímal, V.,Schwarz, J.; Wagner, Z.; Ondracek, J.; Drossinos, Y.; Glytsos, T.; Vratolis, S.; Tørseth, K.; Smolík, J.