Baltic and North Sea Climatology hydrographic part (Version 1.0)

• Main Authors: Hinrichs, Iris, Gouretski, Viktor
• 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_hydro_v1.0; http://cera-www.dkrz.de/WDCC/ui/Compact.jsp?acronym=BNSClim_hydro_v1.0

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 first version (v1.0) of the hydrographic part of the "Baltic and North Sea Climatology (BNSC)". The parameters provided here are water temperature and salinity on 105 depth levels. The data product comprises the time period from 1873-2015 and is based on more than one million observational profiles, which were obtained from several different data sources in the region of the Baltic, the North Sea and adjacent areas of the North Atlantic Ocean (15°W-30°E, 47°N-66°N). Intersection of observational data from different data sources is avoided and the in situ data were objected to an elaborate automatic quality control to identify erroneous observations that would bias the data product. Additionally, a correction of the temporal sampling error was applied to minimize the impact of the temporal distribution of the observations on the created temporal mean fields.