On the performance of the new NWP nowcasting system at the Danish Meteorological Institute during a heavy rain period

2015 ◽  
Vol 127 (5) ◽  
pp. 519-535 ◽  
Author(s):  
Bjarke Tobias Olsen ◽  
Ulrik Smith Korsholm ◽  
Claus Petersen ◽  
Niels Woetmann Nielsen ◽  
Bent Hansen Sass ◽  
...  
Keyword(s):  
Heavy Rain ◽  
Danish Meteorological Institute ◽  
Meteorological Institute

Quality control of rain data used for urban runoff systems

1998 ◽  
Vol 37 (11) ◽  
pp. 113-120 ◽  
Author(s):  
H. K. Jørgensen ◽  
S. Rosenørn ◽  
H. Madsen ◽  
P. S. Mikkelsen
Keyword(s):  
Quality Control ◽  
Rain Gauges ◽  
Software Packages ◽  
Essential Input ◽  
Danish Meteorological Institute ◽  
And Storage ◽  
Rain Data ◽  
Meteorological Institute

When improving software packages such as MOUSE and SAMBA for designing sewers and storage basins, and simulating overflows and flooding the quality of the input becomes important. The essential input to these modelling tools are the historical rain series. This paper presents the procedures for collection and quality control of rain data from a network of tipping bucket rain gauges in Denmark carried out by the Danish Meteorological Institute. During rain, the RIMCO gauge counts the number of tips (each of 0.2 mm of precipitation) every minute. The quality control of the rain data includes an automatic and a manual bit marking, where the automatic control basically is pointing out minutes with extreme intensities. In the manual control, the maximum intensities as well as the daily totals of precipitation are inspected, using weather charts, intensity plots and precipitation sums of nearby Hellmann gauges. Shortcomings and improvements of the quality control are discussed. Although, it is possible to improve the efficiency of the quality control, long term corrections will always be necessary.

Exposure to sunshine early in life prevented development of type 1 diabetes in Danish boys

2016 ◽  
Vol 29 (4) ◽  
Author(s):  
Ramune Jacobsen ◽  
Peder Frederiksen ◽  
Berit L. Heitmann
Keyword(s):  
Type 1 Diabetes ◽  
Regression Models ◽  
Cox Regression ◽  
The Public ◽  
Gestational Exposure ◽  
Sunshine Hours ◽  
Study Population ◽  
Danish Meteorological Institute ◽  
Meteorological Institute

AbstractWe aimed to assess the association between exposure to sunshine during gestation and the risk of type 1 diabetes (T1D) in Danish children.The study population included 331,623 individuals born in Denmark from 1983 to 1988; 886 (0.26%) developed T1D by the age of 15 years. The values of sunshine hours were obtained from the Danish Meteorological Institute. Gestational exposure to sunshine was calculated by summing recorded monthly sunshine hours during the full 9 months prior to the month of birth. The linear variable then was split into two categories separated by the median value.Cox regression models showed that more sunshine during the third gestational trimester was associated with lower hazards (HR) of T1D at age 5–9 years in males: HR (95% CI): 0.60 (0.43–0.84), p=0.003. Our results should be considered in the context of evidence-based recommendations to the public about skin protection from the sun.

scholarly journals Estimation of runoff for proposed hydropower stations near Jakobshavn and Christianshåb, West Greenland

1985 ◽  
Vol 125 ◽  
pp. 100-103
Author(s):  
H.H Thomsen ◽  
R.J Braithwaite
Keyword(s):  
Mass Balance ◽  
The Other ◽  
Sufficient Information ◽  
Climatological Data ◽  
West Greenland ◽  
One Year ◽  
Danish Meteorological Institute ◽  
Inland Ice ◽  
Hydropower Stations ◽  
Meteorological Institute

During the winter of 1983-1984 the authors worked together with T. Thomsen and G.H. Jørgensen, Greenland Technical Organization (GTO), to make estimates of runoff conditions for proposed hydropower stations near Jakobshavn (at Pâkitsup akuliaruserssua) and near Christianshåb (at Kugssup tasia) (fig. 38). This co-operation was necessary because neither GGU nor GTO had sufficient information to do the job alone. For example, the streamflow in both areas is dominated by runoff from the Inland Ice, and we provided the delineations of the glacier-covered areas (Thomsen, 1984) and estimates of various glacier climate parameters (Braithwaite, 1984a), together with one year of mass balance data from the area (Thomsen, 1984). an the other hand, GTO had measured the runoff in both areas for the four years 1980-1983 and we benefitted by access to this data. Both groups used climatological data from Jakobshavn, provided by the Danish Meteorological Institute, as a basis for the hydrological calculations. Bach group used their own model, i.e. the MB1/SM1/ RO1 models from GGU (Braithwaite, 1984b) and a modified NAM-I1 model from GTO (Thomsen & Jørgensen, 1984), and made separate calculations. A summary of the results was sent to the engineering companies responsibIe for preparing designs of the two hydropower stations. Detailed descriptions of our methods and results are given in Braithwaite & Thomsen (1984a,b) and will only be summarized briefly here, especially to illustrate points of principle.

X-Band local area weather radar – preliminary calibration results

2002 ◽  
Vol 45 (2) ◽  
pp. 135-138 ◽  
Author(s):  
N.E. Jensen
Keyword(s):  
High Resolution ◽  
Weather Radar ◽  
Cost Effective ◽  
Local Area ◽  
Rain Gauges ◽  
X Band ◽  
Danish Meteorological Institute ◽  
Typical Range ◽  
Meteorological Institute ◽  
Good Calibration

DHI has developed a cost-effective X-Band Local Area Weather Radar (LAWR) with a typical range (radius) of 60 km, 500 × 500 m areal resolution and 253 reflection levels. The development is performed in a co-operation with a number of European partners, including Danish Meteorological Institute. The specifications of the weather radar and preliminary results from the calibration are presented. Good calibration results have been obtained using high-resolution rain gauges.

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