Baltic and North Sea Climatology meteorological part (Version 2.0)

• Main Authors: Jahnke-Bornemann, Annika, Sadikni, Remon
• Format: Dataset
• Language: English
• Published: World Data Center for Climate (WDCC) at DKRZ 2018
• Subjects: Climate; BNSC; North Atlantic
• Online Access: https://dx.doi.org/10.1594/wdcc/bnsclim_meteo_v2; http://cera-www.dkrz.de/WDCC/ui/Compact.jsp?acronym=BNSClim_meteo_v2

Project: Baltic and North Seas Climatology - In cooperation between the Bundesamt fur Seeschifffahrt und Hydrographie (BSH), the Deutscher Wetterdienst (DWD) and the University of Hamburg (UHH) a new climatological data product of hydrographical and atmospherical parameters in the Baltic and North Sea region was created based solely on in-situ data, the "Baltic and North Seas Climatology"(BNSC). The cooperation was carried out within the framework of the Expertennetzwerk des Bundesministeriums fur Verkehr und digitale Infrastruktur (BMVI). The request of the cooperation was: "Extension of the KLIWAS North Sea Climatology to the Baltic Sea". The aim of the joint project was on the one hand a spatial extension to the Baltic Sea of the reference data sets created in the course of the project "KLIWAS North Sea Climatology (KNSC)". On the other hand, a temporal update was carried out: the atmospheric part of the data product covers the time period from 1950-2015; the hydrographical data product comprises the years 1873-2015. The BNSC covers the area from 15?W to 30?E in longitude and 47?N to 66?N on latitude. The climatologies are based on a considerable amount of in-situ data of the Baltic, the North Sea and adjacent areas of the North Atlantic and consist of temporally averaged gridded fields of atmospheric and hydrographical parameters. The methods already developed for KNSC were improved for both the atmospheric and the hydrographical part. Summary: This is the Baltic and North Sea Climatology (BNSC) for the Baltic Sea and the North Sea in the range 47 ° N to 66 ° N and 15 ° W to 30 ° E. It is the follow-up project to the KNSC climatology. The climatology was first made available to the public in March 2018 by ICDC and is published here in a slightly revised version 2. It contains the monthly averages of mean air pressure at sea level, and air temperature, and dew point temperature at 2 meter height. It is available on a 1 ° x 1 ° grid for the period from 1950 to 2015. For the calculation of the mean values, all available quality-controlled data of the DWD (German Meteorological Service) of ship observations and buoy measurements were taken into account during this period. Additional dew point values were calculated from relative humidity and air temperature if available. Climatologies were calculated for the WMO standard periods 1951-1980, 1961-1990, 1971-2000 and 1981-2010 (monthly mean values). As a prerequisite for the calculation of the 30-year-climatology, at least 25 out of 30 (five-sixths) valid monthly means had to be present in the respective grid box. For the long-term climatology from 1950 to 2015, at least four-fifths valid monthly means had to be available.