Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
The land surface treatment for the Rossby Centre Regional Atmospheric Climate Model - version 2 (RCA2)
SMHI, Forskningsavdelningen, Klimatforskning - Rossby Centre.
SMHI, Forskningsavdelningen, Klimatforskning - Rossby Centre.
Meterologi.
SMHI, Forskningsavdelningen, Hydrologi.
Vise andre og tillknytning
2001 (engelsk)Rapport (Annet vitenskapelig)
Abstract [en]

A new version of the land surface scheme has been completed and is now applied in comparative tests of version 2 of the Rossby Centre Regional Atmospheric Climate Model (RCA2) using analysed fields from the ECMWF reanalysis project (ERA). The scheme contains two soil layers and a vegetation layer. There are two prognostic temperatures, one covering the top soil layer plus vegetation and one for a second, deeper soil layer. There is also a third, bottom soil temperature relaxed to six-hourly ERA fields. For soil moisture there are two prognostic layers but no bottom relaxation is used. A hydrologically-based soil moisture model (beta model) is used to represent subgrid soil moisture variability. A hydrological snow model makes regard to subgrid temperature variability using a geographical database for variance of topography. There are equations for heat and moisture exchange between the two soil layers. Here the hydraulic and thermal properties depend on soil type and soil moisture. Transpiration flux transports moisture from both soil layers depending on a stomatal resistance of vegetation surfaces as function of daylight intensity, soil water deficit, fraction of frozen soil water, air temperature and water vapour pressure deficit in the air. A treatment of rainfall interception on vegetation is used, broadly following the ISBA model, with a vegetation layer storing intercepted water. Subgrid weighting of albedo, surface roughness and parameters for calculating surface resistance is made using a geographical database for area fraction of forest and open land. The leaf area index varies seasonally for short vegetation and for deciduous forest, but not for coniferous forest. A soil freezing/melting algorithm influencing soil temperature is used. Implicit methods are used for solving the equations of most surface variables. A summary of model results compared to observations, is given at the end of the report.

sted, utgiver, år, opplag, sider
SMHI , 2001. , s. 39
Serie
RMK, Rapport Meteorologi och Klimatologi, ISSN 0347-2116 ; 98
HSV kategori
Forskningsprogram
Meteorologi; Klimat
Identifikatorer
URN: urn:nbn:se:smhi:diva-2346Lokal ID: Meteorologi, Rapporter, Serie RMKOAI: oai:DiVA.org:smhi-2346DiVA, id: diva2:947639
Tilgjengelig fra: 2001-05-13 Laget: 2016-07-08 Sist oppdatert: 2019-06-14bibliografisk kontrollert

Open Access i DiVA

fulltext(4482 kB)2 nedlastinger
Filinformasjon
Fil FULLTEXT01.pdfFilstørrelse 4482 kBChecksum SHA-512
50e23b53aaa9cd2b6b3f070ab3590f006fab5c75a8428fa3161f6e935309588546dbd6c38b3ace131c94023304a4d8607c23293c9a45e1d105a256220ef2e585
Type fulltextMimetype application/pdf

Personposter BETA

Lindström, GöranGraham, Phil

Søk i DiVA

Av forfatter/redaktør
Lindström, GöranGraham, Phil
Av organisasjonen

Søk utenfor DiVA

GoogleGoogle Scholar
Totalt: 2 nedlastinger
Antall nedlastinger er summen av alle nedlastinger av alle fulltekster. Det kan for eksempel være tidligere versjoner som er ikke lenger tilgjengelige

urn-nbn

Altmetric

urn-nbn
Totalt: 215 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
v. 2.35.8
|