Publications

Springtime nitrogen oxides and tropospheric ozone in Svalbard: local and long-range transported air pollution

Dekhtyareva, Alena; Hermanson, Mark H.; Nikulina, Anna; Hermansen, Ove; Svendby, Tove Marit; Holmén, Kim; Graversen, Rune

Svalbard is a near pristine Arctic environment, where long-range transport from mid-latitudes is an
important air pollution source. Thus, several previous studies investigated the background
nitrogen oxides (NO x ) and tropospheric ozone (O 3 ) springtime chemistry in the region. However,
there are also local anthropogenic emission sources on the archipelago such as coal power plants,
ships and snowmobiles, which may significantly alter in situ atmospheric composition.
Measurement results from three independent research projects were combined to identify the
effect of emissions from various local sources on the background concentration of NO x and O 3 in
Svalbard. The hourly meteorological and chemical data from the ground-based stations in
Adventdalen, Ny-Ålesund and Barentsburg were analysed along with daily radiosonde soundings
and weekly data from O 3 sondes. The data from the ERA5 reanalysis were used to evaluate the
prevailing synoptic conditions during the fieldwork. Although the correlation between the NO x
concentrations in the three settlements was low due to dominant influence of the local
atmospheric circulation, cases with common large-scale meteorological conditions increasing the
local pollutant concentration at all sites were identified. In colder and calmer days and days with
temperature inversions, the concentrations of NO x were higher. In contrast to NO x values, O 3
concentrations in Barentsburg and at the Zeppelin station in Ny-Ålesund correlated strongly, and
hence the prevailing synoptic situation and long-range transport of air masses were controlling
factors for them. The Lagrangian models HYSPLIT and FLEXPART have been used to investigate air
mass transport and transformations during the large scale O 3 depletion and enrichment events.
The factors affecting Arctic springtime photochemistry of O 3 have been investigated thoroughly
using Lagrangian and Eulerian numerical weather prediction model data and Metop GOME-2
satellite observations.

Springtime depletion of tropospheric ozone, gaseous elemental mercury and non-methane hydrocarbons in the European Arctic, and its relation to atmospheric transport.

Eneroth, K.; Holmén, K.; Berg, T.; Schmidbauer, N.; Solberg, S.

Springtime boundary layer O3 and GEM depletion at Toolik Lake, Alaska.

Van Dam, B.; Helmig, D.; Burkhart, J.F.; Obrist, D.; Oltmans, S.J.

Spredt lys: arktisk dis og lav sol.

Hole, L.R.

Spredningsberegninger for ammoniakkutslipp. Leangen idrettsanlegg i Trondheim.

Tønnesen, Dag Arild

NILU has calculated concentrations of ammonia (NH3) caused by emissions at Leangen sport stadium for different emission heights. The outlet for ammonia should be at least 21 m above ground level in order to avoid exceedance of the limit value for working conditions. As long as the emission continues, the hourly average ground level concentrations will be above the odour threshold downwind from the emission.

NILU

Spredningsberegninger av pipeutslipp fra Leca Rælingen

Weydahl, Torleif

NILU

Spredningsberegninger av luftforurensning fra Sunndal Metallverk

Weydahl, Torleif

Rapporten presenterer spredningsberegninger for utslipp til luft fra Hydro Sunndal sitt smelteverk i Sunndalsøra for nåsituasjonen med utslippsmengder som i gjeldende utslippstillatelse, og en situasjon med ny utvidet anodefabrikk. Det er beregnet bakkekonsentrasjoner av SO2, støv, fluorider, PAH og metallkomponenter. Det er også gjort beregninger for utslipp i perioden 23. mai til 15. august 2019 hvor NILU utførte målinger av disse komponentene. Basert på beregningene er det vurdert «lav til moderat» risiko for overskridelse av forskriftens målsettingsverdi for nikkel i området nær anlegget. Ny anodefabrikk har ingen vesentlig betydning for konsentrasjonsnivåer utenfor metallverket som er relevant i forhold til gjeldende grenseverdier eller luftkvalitetskriterier.

NILU

Sporelementer i luft i Oslo. Sammendrag. NILU F

Steinnes, E.; Berg, T.; Hagen, L.O.; Siegle, S.; Vadset, M.; Åberg, G.

Spesifikasjoner for sensorsystemer til måling av luftkvalitet. Anbefalinger ved anskaffelse.

Dauge, Franck Rene; Marsteen, Leif; Schneider, Philipp

This report explains technical terms related to measuring performances, as well as providing recommendations and requirements in connection with preparation of tenders. The report goes through existing instrumentation for air quality measurement in Norway and current legislation on the subject. It mentions possible applications for new measurement technologies. An overview of metrological terms with explanations gives the reader basic knowledge necessary to interpret instrument specifications. The report identifies some important parameters related to the quality of sensor systems.

NILU

Spécification des Modèles d'Importation. NILU OR

Laupsa, H.; Bruno, M.

Specific absorption coefficient of phytoplankton off the Southwest coast of the Iberian Peninsula: A contribution to algorithm development for ocean colour remote sensing.

Goela, P.C.; Icely, J.; Cristina, S.; Newton, A.; Moore, G.; Cordeiro, C.

Species dependent distribution of polybrominated biphenyls and diphenylethers in eggs of Norwegian birds of prey.

Herzke, D.; Kallenborn, R.; Nygård, T.; Sandanger, T.

Spatiotemporal Patterns in Data Availability of the Sentinel-5P NO2 Product over Urban Areas in Norway

Schneider, Philipp; Hamer, Paul David; Kylling, Arve; Shetty, Shobitha; Stebel, Kerstin

MDPI