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The AVHRR/3 imager on the NOAA-15 satellite (launched in May 1998) includes a new spectral channel at 1.6 μm ( denoted 3A) which has not been used earlier for operational monitoring of meteorological conditions. This channel has been available in research mode from the ATSR instrument onboard the …

We describe a method to remotely sense precipitation and classify its intensity over water, coast, and land surfaces. This method is intended to be used in a nowcasting environment. It is based on data obtained from the Advanced Microwave Sounding Unit (AMSU) onboard NOAA-15. Each observation is …

På uppdrag av Naturvårdsverket, Miljödataenheten, har SMHI under 1999 genomfört ett forskningsuppdrag i form av en förstudie avseende en Nationell Emissionsdatabas (EDB) för utsläpp till luft. Projektet syftar till att utreda och beskriva alternativa lösningar för hur en sådan EDB skulle kunna …

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The results of 12 coupled atmosphere-ocean general circulation model experiments participating in the second phase of the Coupled Model Intercomparison Project (CMIP2) are studied with focus on the area of northern Europe. The variables considered are surface air temperature, precipitation and sea …

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Since 1983 an automatic solar radiation network of 12 stations is operated by SMHI. At all 12 stations direct solar irradiance (Eppley NIP pyrheliometers) and global irradiance (Kipp & Zonen CMlO/CMl 1 pyranometers) are measured continuously. Together with general network information and …

The Baltic Sea Experiment (BALTEX) is the European regional project within the Global Energy and Water Cycle Experiment (GEWEX). The BALTEX Working Group on Radar (WGR) is responsible for coordinating weather radar activities within the framework of BALTEX, including the establishment and operation …

A summary of the quality control, quality assurance and measurements of total ozone at Norrköping and Vindeln during the period 1997-1999 is made. The Brewer #006 and Brewer #128 were compared to the travelling reference Brewer #017 at Vindeln in 1999. Major changes in the measurements and …

The C band weather radars of today are sensitive enough to record clear air echos from the boundary layer during the warmer seasons even in latitudes as high as Scandinavia. Such clear air echos have long been recognised in the US and a.o. used to retrieve the wind. Curiously enough, in Europe …