Browsing NILU Brage by Author "Walker, Sam-Erik"
Now showing items 41-54 of 54
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A study of the relative expanded uncertainty formula for comparing low-cost sensor and reference measurements
Walker, Sam-Erik; Schneider, Philipp (NILU report;1/2020, Research report, 2020)In this report, we investigate the relative expanded uncertainty (REU) formula for comparing low-cost sensors (microsensors) and reference measurements. The purpose of the REU formula is to check if microsensor measurements ... -
The contribution to nitrogen deposition and ozone formation in South Norway from atmospheric emissions related to the petroleum activity in the North Sea.
Solberg, Sverre; Walker, Sam-Erik; Knudsen, Svein; Lazaridis, Mihalis; Beine, Harald Jürgen; Semb, Arne (NILU OR;5/99, Research report, 1999)A photochemical plume model has been developed and refined. The model is designed to simulate the advection and photochemistry for several simultaneous point sources as well as the atmospheric mixing. The model has been ... -
The Eulerian urban dispersion model EPISODE – Part 2: Extensions to the source dispersion and photochemistry for EPISODE–CityChem v1.2 and its application to the city of Hamburg
Karl, Matthias; Walker, Sam-Erik; Solberg, Sverre; Ramacher, Martin O. P. (Journal article; Peer reviewed, 2019)This paper describes the CityChem extension of the Eulerian urban dispersion model EPISODE. The development of the CityChem extension was driven by the need to apply the model in largely populated urban areas with highly ... -
The NILU SURFEX-EnKF land data assimilation system.
Lahoz, William A.; Walker, Sam-Erik; Dammann, Dyre (NILU TR; 02/2010, Research report, 2010)Development of the NILU SURFEX-EnKF land data assimilation system is described. The system is being developed in collaboration with the Norwegian Meteorological Institute and Météo-France. It is based on the Météo-France ... -
The urban air dispersion model EPISODE applied in AirQUIS2003. Technical description.
Slørdal, Leiv Håvard; Walker, Sam-Erik; Solberg, Sverre (NILU TR; 12/2003, Research report, 2003)This technical report gives a detailed description of the urban scale dispersion model EPISODE which is the dispersion model applied in the PC-based Air Quality Information System, AirQUIS2003 (Bøhler and Sivertsen,1998; ... -
Tiltaksutredning for lokal luftkvalitet i Lørenskog kommune
Høiskar, Britt Ann Kåstad; Walker, Sam-Erik; Weydahl, Torleif; Markelj, Miha; Andersen, André; Lopez-Aparicio, Susana; Grythe, Henrik (NILU rapport;32/2022, Research report, 2023)NILU – Norsk institutt for luftforskning har, i samarbeid med Transportanalyse AS, utarbeidet en tiltaksutredning for bedre luftkvalitet i Lørenskog. Utredningen er gjennomført på oppdrag av Lørenskog kommune. Tiltaksutredningen ... -
Tiltaksutredning for lokal luftkvalitet i Tromsø
Weydahl, Torleif; Walker, Sam-Erik; Johnsrud, Mona; Vo, Dam Thanh; Ranheim, Patrick (NILU rapport;26/2019, Research report, 2019)Tiltaksutredningen, med handlingsplan og tiltak, skal bidra til å redusere luftforurensningen til et nivå som tilfredsstiller kravene i forurensningsforskriften. Tiltaksutredningen omfatter en kartlegging av luftkvaliteten ... -
Tunggassmodellen INSGAS. Programbeskrivelse og brukerveiledning.
Walker, Sam-Erik (NILU OR;59/93, Research report, 1993)NILUs program INSGAS er et program for beregning av spredning av tunge og kalde gasser i atmosfæren som følge av et tenkt kortvarig (instantant) utslipp. Programmet er basert på en teori opprinnelig utviklet av Karl J. ... -
Uncertainties in assessing the environmental impact of amine emissions from a CO2 capture plant
Karl, Matthias; Castell, Nuria; Simpson, David; Solberg, Sverre; Starrfelt, Jostein; Svendby, Tove Marit; Walker, Sam-Erik; Wright, Richard Frederic (Journal article; Peer reviewed, 2014)In this study, a new model framework that couples the atmospheric chemistry transport model system WRF-EMEP and the multimedia fugacity level III model was used to assess the environmental impact of amine emissions to air ... -
The urban dispersion model EPISODE v10.0 – Part 1: An Eulerian and sub-grid-scale air quality model and its application in Nordic winter conditions
Hamer, Paul David; Walker, Sam-Erik; Sousa Santos, Gabriela; Vogt, Matthias; Vo, Dam Thanh; Lopez-Aparicio, Susana; Schneider, Philipp; Ramacher, Martin O. P.; Karl, Matthias (Peer reviewed; Journal article, 2020)This paper describes the Eulerian urban dispersion model EPISODE. EPISODE was developed to address a need for an urban air quality model in support of policy, planning, and air quality management in the Nordic, specifically ... -
Utslipp fra petroleumsrelatert aktivitet på Haltenbanken. Bidrag til fotokjemisk oksidantdannelse og forsuring.
Knudsen, Svein; Johnsrud, Mona; Solberg, Sverre; Walker, Sam-Erik; Skjelkvåle, Brit Lisa (NILU OR;6/96, Research report, 1996)Det er undersøkt virkningene av utslipp av nitrogenoksider og hydrokarboner til luft fra Haltenbanken (Draugen, Heidrun, Njord, Norne) og Åsgard. Dette arbeidet omfatter beregninger av fotokjemiske reaksjoner, resulterende ... -
Validering og forslag til forbedring av modellen Fotoplume. Forstudie.
Solberg, Sverre; Semb, Arne; Walker, Sam-Erik; Knudsen, Svein (NILU OR;49/98, Research report, 1998)På oppdrag fra Oljeindustriens landsforening (OLF) har Norsk institutt for luftforskning (NILU) arbeidet med å validere og vurdere den fotokjemiske spredningsmodellen Fotoplume som tidligere har vært benyttet til å beregne ... -
VOC measurements 2020
Solberg, Sverre; Claude, Anja; Reimann, Stefan; Sauvage, Stéphane; Walker, Sam-Erik (EMEP/CCC-Report;4/2022, Research report, 2022) -
VOC measurements 2021
Solberg, Sverre; Claude, Anja; Reimann, Stefan; Walker, Sam-Erik (EMEP/CCC-Report;4/2023, Research report, 2023)