Hydrographic Baltic and North Seas Climatology (BNSC)

BNSC surface sea water temperature, decadal mean January 1986-1995, optimally interpolated. Copyright: UHH/CEN/AJB

Topics

Access

UNRESTRICTED:

View BNSC data at LAS (other parameters via choose dataset - BNSC)
Get BNSC data via HTTP (all files at once with this wget script)
Access BNSC data via OPeNDAP

RESTRICTED: This link to the data set is only available for a restricted user group. The data set is only accessible in CEN/MPI net or accessible from external nets with a customer account. Please contact ICDC if you would like to access this data from outside the network.

Data access via file system: /data/icdc/ocean/bnsc/

to top

Description

This data set was created as part of a cooperation of ICDC with the DWD and the BSH. This is version 1.1 of the hydrographic part of the “Baltic and North Seas 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.

The version 1.1 was published on 9. Mai 2019 after correcting errors in v1.0. Details about the differences between these versions can be found in the Documentation "Difference BNSChydr v1.0 and v1.1" (see references). All netCDF files but the interpolated decadal fields has been corrected and replaced the oldest version as well on 15.6.2018.

The data product consists of gridded mean fields of water temperature and salinity. The spatial resolution is 0.25° in meridional and zonal direction. The depth levels are irregularly distributed: for the depth interval from 0 to 50m the distance between the single depth levels is 5m. Below 50m, the distance increases progressively by 1m to the last depth level of 4985m. The dimensions of the data product are 180*76*105 (longitude, latitude, depth). The BNSC climatology consists, on the one hand, of time series of monthly and annual mean values of the hydrographic parameters as fields of box averages. Grid boxes that show no observations are left empty. Based on these time series, decadal monthly mean fields are created for the 6 decades

1956-1965,
1966-1975,
1976-1985,
1986-1995,
1996-2005,
2006-2015

as another part of the data product. Again, gaps remain in observational data-void regions.

The third part of the data product results from above mentioned decadal mean fields: horizontally interpolated fields by application of the method of objective analysis. Consequently, this subset does not contain gaps.

Available parameters:

box averages: monthly and annual mean, resp. standard deviation, number of observations
decadal box averages: decadal monthly mean, resp. standard deviation, mean year, standard deviation to mean year, number of years
decadal interpolated mean: interpolated monthly mean, absolute median deviation, number of bins, first guess, relative interpolation error, mean year, mean distance

A meteorological part belongs to this data set, which can be found at ICDC under "Meteorological climatology of Baltic and North Seas BNSC".

Last update of data set at ICDC: 9.5.2019

to top

Parameters

Parameters of the hydrBNSC data set
Name	Unit
Temperature	°C
Salinity	-

to top

Coverage, spatial and temporal resolution

Period and temporal resolution:

1873 until 2015
monthly, yearly, decadal

Coverage and spatial resolution:

Geographic Latitude: 47°N to 66°N
Geographic Longitude: 15°W to 30°E
Altitude: 105 depth levels

Format:

NetCDF

to top

Data quality

See description.

to top

Contact

Remon Sadikni

ICDC / CEN / University of Hamburg
E-Mail: remon.sadikni"AT"uni-hamburg.de

Annika Jahnke-Bornemann
ICDC / CEN / University of Hamburg
E-Mail: annika.jahnke-bornemann"AT"uni-hamburg.de

to top

References

Literature:

Documentation "Difference BNSChydr v1.0 and v1.1" (pdf, not barrier free)
Hinrichs I, Jahnke-Bornemann A, Andersson A, Ganske A, Gouretski V, Jensen C, Klein B, Möller J, Sadikni R and Tinz B (2019) The Baltic and North Seas Climatology (BNSC)—A Comprehensive, Observation-Based Data Product of Atmospheric and Hydrographic Parameters. Front. Earth Sci. 7:158. doi: 10.3389/feart.2019.00158. https://doi.org/10.3389/feart.2019.00158
Version 1.1: Hinrichs, Iris; Gouretski, Viktor (2019). Baltic and North Seas Climatology hydrographic part (Version 1.1). World Data Center for Climate (WDCC) at DKRZ. https://doi.org/10.26050/WDCC/BNSClimHydrov1.1
Version 1.0: Bersch, Manfred; Gouretski, Viktor; Sadikni, Remon; Hinrichs, Iris; (2013): KLIWAS North Sea Climatology of Hydrographic Data (Version 1.0); World Data Center for Climate (WDCC). doi:10.1594/WDCC/KNSC_hyd_v1.0 , https://doi.org/10.1594/WDCC/KNSC_hyd_v1.0

to top

Data citation

Please cite the data as follows:

Version 1.1: Hinrichs, Iris; Gouretski, Viktor (2019). Baltic and North Seas Climatology hydrographic part (Version 1.1). World Data Center for Climate (WDCC) at DKRZ. https://doi.org/10.26050/WDCC/BNSClimHydrov1.1

and with the following acknowledgments:

Thanks to ICDC, CEN, University of Hamburg for data support.

to top