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  The Baltic and North Seas Climatology (BNSC) - A comprehensive, observation-based data product of atmospheric and hydrographic parameters

Hinrichs, I., Jahnke-Bornemann, A., Andersson, A., Ganske, A., Gouretski, V., Jensen, C., et al. (2019). The Baltic and North Seas Climatology (BNSC) - A comprehensive, observation-based data product of atmospheric and hydrographic parameters. Frontiers in Earth Science, 7: UNSP 158. doi:10.3389/feart.2019.00158.

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 Creators:
Hinrichs , Iris1, Author
Jahnke-Bornemann, Annika2, Author           
Andersson, Axel1, Author
Ganske, Anette1, Author
Gouretski, Viktor2, Author           
Jensen, Corinna1, Author
Klein, Birgit1, Author
Moeller , Jens1, Author
Sadikni, Remon1, Author
Tinz, Birger3, Author           
Affiliations:
1external, ou_persistent22              
2I 1 - Integrated Climate Data Center, Integrated Activities, The CliSAP Cluster of Excellence, External Organizations, ou_1863492              
3B 4 - Regional Storms and their Marine Impacts, Research Area B: Climate Manifestations and Impacts, The CliSAP Cluster of Excellence, External Organizations, ou_1863484              

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Free keywords: REANALYSIS; INTERPOLATION; CIRCULATIONGeology; North Sea; Baltic Sea; climatology; reanalysis; in situ data; quality control;
 Abstract: The Baltic and North Seas Climatology (BNSC) presented here is a new climatology calculated solely from marine in situ observations. Created in cooperation between University of Hamburg (UHH), Federal Maritime and Hydrographic Agency [Bundesamt fur Seeschifffahrt und Hydrographie (BSH)] and German Meteorological Service [Deutscher Wetterdienst (DWD)], the BNSC is an update of the KLIWAS ("Klimawandel und WasserstraBen") climatology for the North Sea and is extended to the Baltic Sea. A thorough quality control, the reduction of the temporal sampling error and spatial and temporal averaging were applied to the observations, yielding time series of gridded fields of atmospheric and hydrographic parameters in the region of the Baltic, the North Sea and adjacent regions of the North Atlantic. The atmospheric subset of the BNSC consists of time series of monthly mean gridded fields of 2 m air and dew point temperature and air pressure at sea level for the period 1950-2015 on a horizontal 1 degrees x 1 degrees grid. Climatological fields are provided as well. The hydrographic part of the BNSC comprises the variables water temperature and salinity on 105 depth levels for the time interval 1873-2015. The grid boxes' edge length is 0.25 degrees in both zonal and meridional direction. Monthly and annual mean fields are provided as well as decadal monthly mean fields. To create homogenous fields, the method of objective analysis was applied to the fields of decadal means. Furthermore, an extensive sensitivity study was carried out to assess the sensitivity of the data product to the amount of observational data. The BNSC introduced here is compared to several different data products: three reanalyses (ERA-Interim, ERA40 and COSMO-REA6), the corresponding KUWAS product and meteorological station data for the atmospheric part. The hydrographic subset is compared to the KLIWAS climatology, the BALTIC ATLAS and the Baltic Sea Physical Reanalysis Product. The BNSC data product allows studying of climate variability but also holds the chance to validate regional numerical climate simulations, which makes it a valuable reference data set. The BSNC is freely available via the website of University of Hamburg's Integrated Climate Data Center.

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Language(s): eng - English
 Dates: 2019
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: ISI: 000473520200001
DOI: 10.3389/feart.2019.00158
 Degree: -

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Title: Frontiers in Earth Science
  Abbreviation : Front. Earth Sci.
Source Genre: Journal
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Publ. Info: Lausanne : Frontiers Media
Pages: - Volume / Issue: 7 Sequence Number: UNSP 158 Start / End Page: - Identifier: ISSN: 2296-6463
CoNE: https://pure.mpg.de/cone/journals/resource/2296-6463