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Ivarsson, Karl-Ivar
Publikasjoner (5 av 5) Visa alla publikasjoner
Ivarsson, K.-I. (2020). A Score for Probability Forecasts of Binary Events Based on the User's Cost-Loss Relations. Weather and forecasting, 35(1), 113-127
Åpne denne publikasjonen i ny fane eller vindu >>A Score for Probability Forecasts of Binary Events Based on the User's Cost-Loss Relations
2020 (engelsk)Inngår i: Weather and forecasting, ISSN 0882-8156, E-ISSN 1520-0434, Vol. 35, nr 1, s. 113-127Artikkel i tidsskrift (Fagfellevurdert) Published
HSV kategori
Forskningsprogram
Meteorologi
Identifikatorer
urn:nbn:se:smhi:diva-5620 (URN)10.1175/WAF-D-19-0013.1 (DOI)000507237200001 ()
Tilgjengelig fra: 2020-01-29 Laget: 2020-01-29 Sist oppdatert: 2020-01-29bibliografisk kontrollert
Bengtsson, L., Andrae, U., Aspelien, T., Batrak, Y., Calvo, J., de Rooy, W., . . . Koltzow, M. O. (2017). The HARMONIE-AROME Model Configuration in the ALADIN-HIRLAM NWP System. Monthly Weather Review, 145(5), 1919-1935
Åpne denne publikasjonen i ny fane eller vindu >>The HARMONIE-AROME Model Configuration in the ALADIN-HIRLAM NWP System
Vise andre…
2017 (engelsk)Inngår i: Monthly Weather Review, ISSN 0027-0644, E-ISSN 1520-0493, Vol. 145, nr 5, s. 1919-1935Artikkel i tidsskrift (Fagfellevurdert) Published
HSV kategori
Forskningsprogram
Meteorologi
Identifikatorer
urn:nbn:se:smhi:diva-4149 (URN)10.1175/MWR-D-16-0417.1 (DOI)000404870300009 ()
Tilgjengelig fra: 2017-08-07 Laget: 2017-08-07 Sist oppdatert: 2017-08-07bibliografisk kontrollert
Häggmark, L., Ivarsson, K.-I., Gollvik, S. & Olofsson, R. O. (2000). Mesan, an operational mesoscale analysis system. Tellus. Series A, Dynamic meteorology and oceanography, 52(1), 2-20
Åpne denne publikasjonen i ny fane eller vindu >>Mesan, an operational mesoscale analysis system
2000 (engelsk)Inngår i: Tellus. Series A, Dynamic meteorology and oceanography, ISSN 0280-6495, E-ISSN 1600-0870, Vol. 52, nr 1, s. 2-20Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A system for mesoscale analyses of selected variables has been developed. The analysed parameters are of general interest in operational weather forecasting, but normally not available from NWP systems, or available, but with a significantly lower quality than achieved by the mesoscale analysis system. A supplementary objective is to produce initial information to be used for now-casting techniques. Examples of parameters are precipitation, temperature, humidity, visibility, wind and clouds. The basis of the analysis system is the optimal interpolation technique (OI). The use of observations from automatic stations, radars and satellites have been investigated. The investigation indicates that a dense network of ordinary precipitation gauge measurements can produce more accurate analyses than more elaborate systems like radar that suffers from anomalous echoes and other errors.

HSV kategori
Forskningsprogram
Meteorologi
Identifikatorer
urn:nbn:se:smhi:diva-1526 (URN)10.1034/j.1600-0870.2000.520102.x (DOI)000085086500002 ()
Tilgjengelig fra: 2015-08-18 Laget: 2015-08-17 Sist oppdatert: 2017-12-04bibliografisk kontrollert
Häggmark, L., Ivarsson, K.-I. & Olofsson, P.-O. (1997). MESAN Mesoskalig Analys. SMHI
Åpne denne publikasjonen i ny fane eller vindu >>MESAN Mesoskalig Analys
1997 (engelsk)Rapport (Annet vitenskapelig)
Abstract [en]

This report describes the work being done in developing the MESAN system for analyzing surface parameters and clouds. The following parameters are being analyzed:- 2 meter temperature,- precipitation in mm water for 1, 3, 12 and 12 hours accumulation time, and for new snow-cover in cm,- wind speed and direction and gust speed at 10 meter elevation,- visibility,- relative humidity,- total cloud cover,- amount and low clouds,- significant cloud base,- probability of observing significant cloud base,- higt of cloud top,- depth of snow cover, and- sea surface temperature.Hirlam data are normally used as first guess fields. Observatons are taken from synop, metar, Swedish climate stations, satellites, radars and automatic stations. Much work has been devoted to minimizing systematic errors in observations and investigating structure functions of first guess errors.The analys method used is optimal interpolation.

sted, utgiver, år, opplag, sider
SMHI, 1997. s. 77
Serie
RMK, Rapport Meteorologi och Klimatologi, ISSN 0347-2116 ; 75
Emneord
analysis, Sweden, surface parameters, mesoscale, optimal interpolation
HSV kategori
Forskningsprogram
Meteorologi; Klimat
Identifikatorer
urn:nbn:se:smhi:diva-2634 (URN)Meteorologi, Klimat, Rapporter, Serie RMK (Lokal ID)Meteorologi, Klimat, Rapporter, Serie RMK (Arkivnummer)Meteorologi, Klimat, Rapporter, Serie RMK (OAI)
Tilgjengelig fra: 1997-03-07 Laget: 2016-07-08 Sist oppdatert: 2020-03-27bibliografisk kontrollert
Ivarsson, K.-I. (1986). Resultat av byggväderprognoser - säsongen 1984/85. SMHI
Åpne denne publikasjonen i ny fane eller vindu >>Resultat av byggväderprognoser - säsongen 1984/85
1986 (svensk)Rapport (Annet vitenskapelig)
sted, utgiver, år, opplag, sider
SMHI, 1986. s. 17
Serie
Meteorologi, ISSN 0283-7730 ; 3
Emneord
prognos, medeltemperatur, vindriktning
Identifikatorer
urn:nbn:se:smhi:diva-2501 (URN)Meteorologi, Rapporter, Serie Meteorologi (Lokal ID)Meteorologi, Rapporter, Serie Meteorologi (Arkivnummer)Meteorologi, Rapporter, Serie Meteorologi (OAI)
Tilgjengelig fra: 1986-05-15 Laget: 2016-07-08 Sist oppdatert: 2016-07-08bibliografisk kontrollert
Organisasjoner
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