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Extended back-trajectories by means of adjoint equations
SMHI, Forskningsavdelningen, Luftmiljö.ORCID-id: 0000-0003-2738-5556
2004 (engelsk)Rapport (Annet vitenskapelig)
Abstract [en]

Back-trajectory models are examples of the most simple adjoint models used for tracing of important source regions attributed to measured tracers. These models do, however, suffer from oversimplification of the transport-diffusion processes in the atmosphere. By utilizing adjoint equations in a 3D transport-diffusion model several advantages could be achieved, all transport mechanisms are included and the response at receptor points could more properly mimic the sampled time-period of the measurements. In this paper the concept of adjoint equations is described, the similarity between back-trajectories and the adjoint technique is demonstrated, and options of using the ad joint technique for guidance of emission sources are explored. To illustrate the possibilities four different events are examined, the Chernobyl accident, the ETEX I exercise, the Algeciras accident and an event with heavy smoke noticed in Scandinavia. Finally, a suggestion for an operational setup is discussed.

sted, utgiver, år, opplag, sider
SMHI , 2004. , s. 37
Serie
RMK, Rapport Meteorologi och Klimatologi, ISSN 0347-2116 ; 105
Emneord [en]
Atmospheric dispersion, MATCH model, Adjoint equations, Trajectories
HSV kategori
Forskningsprogram
Meteorologi; Klimat
Identifikatorer
URN: urn:nbn:se:smhi:diva-2340Lokal ID: Meteorologi, Rapporter, Serie RMKOAI: oai:DiVA.org:smhi-2340DiVA, id: diva2:947633
Tilgjengelig fra: 2004-05-13 Laget: 2016-07-08 Sist oppdatert: 2020-04-08bibliografisk kontrollert

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