KLIWAS North Sea Climatology of Hydrographic Data (Version 1.0)

The assessment of climate change impacts on the North Sea and the overlying atmosphere requires reliable reference data in order to identify change and impacts against a highly variable background with time scales from hours to multi-decadal. Therefore, in the frame work of the research programme "KLIWAS - Impacts of climate change on waterways and navigation - Searching for options of adaptation" of the German Federal Ministry of Transport, Building and Urban Development (BMVBS), a new climatology was developed in a close co-operation of the Federal Maritime and Hydrographic Agency (BSH), the German Meteorological Service (DWD) and the Integrated Climate Data Center (ICDC) of the University Hamburg.


All available oceanographic in-situ data for temperature and salinity have been carefully checked for quality before further processing, while the atmospheric data had already been quality controlled by the DWD. More than 13 million temperature and 12 million salinity (starting in 1890) as well as more than 19 million atmospheric data (air temperature, dew point and air pressure starting in 1950) have been processed. Monthly averages have been created on specified grids for the ocean and atmosphere. For the first time oceanographic and meteorological climatologies are provided on a coordinated grid. The climatological data set is supposed to be growing with time and new data can be implemented as they are collected. it is planned to add additional parameters in future.


The climatologies will be used to analyse the temporal and spatial variability in the North Sea area and deduce long-term trends. Additional the data sets will be needed for the validation of regional climate scenarios. The products are publicly available at the ICDC portal ( http://icdc.cen.uni-hamburg.de/1/projekte/knsc.html ). A corrected version of the climatology is available. For more information see Accuracy report.

Identification

Data identification

Citation

Date (Publication)
2013-12-03
Edition

1
Citation identifier
KNSC_hyd_v1.0
Citation identifier
doi:10.1594/WDCC/KNSC_hyd_v1.0
Originator
  University of Hamburg - None
http://www.cen.uni-hamburg.de/
Author
  University of Hamburg - Manfred Bersch
http://www.cen.uni-hamburg.de/
Author
  University of Hamburg - Dr. Viktor Gouretski
http://icdc.zmaw.de
Author
  University of Hamburg - Remon Sadikni
http://icdc.zmaw.de
Author
  University of Hamburg - Dr. Iris Hinrichs
http://www.cen.uni-hamburg.de/
Publisher
  WDC Climate at DKRZ
Point of contact
  University of Hamburg - Remon Sadikni
http://icdc.zmaw.de

Format

Name

NetCDF
Keywords

  • Conductivity Sensors
Keywords

  • FLOATS
Keywords

  • In Situ Ocean-based Platforms
Keywords

  • Temperature/Humidity Sensors
Keywords

  • analysis
Keywords

  • data assimilation
Keywords

  • present day climate
Use limitation

scientific use: For scientific use only
Language

eng; USA
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Begin date
1890-01-01
End date
2011-12-31
 

Distribution

Distribution

Distribution format
  • NetCDF ()

Digital transfer options

Transfer size
14728
OnLine resource
https://www.wdc-climate.de/ui/entry?acronym=KNSC_hyd_v1.0
 

Quality

Data quality

Hierarchy level
collection

Non quantitative attribute accuracy

Name of measure

n/a
Measure description

None
 

Content

Coverage Description

Attribute description
sea_water_salinity
Descriptor

sea_water_salinity [CF-Standard Name]; unit: psu

Coverage Description

Attribute description
sea_water_salinity
Descriptor

sea_water_salinity [CF-Standard Name]; unit: psu

Coverage Description

Attribute description
sea_water_temperature
Descriptor

Sea water temperature is the in situ temperature of the sea water. To specify the depth at which the temperature applies use a vertical coordinate variable or scalar coordinate variable. There are standard names for sea_surface_temperature, sea_surface_skin_temperature, sea_surface_subskin_temperature and sea_surface_foundation_temperature which can be used to describe data located at the specified surfaces. For observed data, depending on the period during which the observation was made, the measured in situ temperature was recorded against standard "scales". These historical scales include the International Practical Temperature Scale of 1948 (IPTS-48; 1948-1967), the International Practical Temperature Scale of 1968 (IPTS-68, Barber, 1969; 1968-1989) and the International Temperature Scale of 1990 (ITS-90, Saunders 1990; 1990 onwards). Conversion of data between these scales follows t68 = t48 - (4.4 x 10e-6) * t48(100 - t - 48); t90 = 0.99976 * t68. Observations made prior to 1948 (IPTS-48) have not been documented and therefore a conversion cannot be certain. Differences between t90 and t68 can be up to 0.01 at temperatures of 40 C and above; differences of 0.002-0.007 occur across the standard range of ocean temperatures (-10 - 30 C). The International Equation of State of Seawater 1980 (EOS-80, UNESCO, 1981) and the Practical Salinity Scale (PSS-78) were both based on IPTS-68, while the Thermodynamic Equation of Seawater 2010 (TEOS-10) is based on ITS-90. References: Barber, 1969, doi: 10.1088/0026-1394/5/2/001; UNESCO, 1981; Saunders, 1990, WOCE Newsletter, 10, September 1990. [CF-Standard Name]; unit: degC

Coverage Description

Attribute description
sea_water_temperature
Descriptor

Sea water temperature is the in situ temperature of the sea water. To specify the depth at which the temperature applies use a vertical coordinate variable or scalar coordinate variable. There are standard names for sea_surface_temperature, sea_surface_skin_temperature, sea_surface_subskin_temperature and sea_surface_foundation_temperature which can be used to describe data located at the specified surfaces. For observed data, depending on the period during which the observation was made, the measured in situ temperature was recorded against standard "scales". These historical scales include the International Practical Temperature Scale of 1948 (IPTS-48; 1948-1967), the International Practical Temperature Scale of 1968 (IPTS-68, Barber, 1969; 1968-1989) and the International Temperature Scale of 1990 (ITS-90, Saunders 1990; 1990 onwards). Conversion of data between these scales follows t68 = t48 - (4.4 x 10e-6) * t48(100 - t - 48); t90 = 0.99976 * t68. Observations made prior to 1948 (IPTS-48) have not been documented and therefore a conversion cannot be certain. Differences between t90 and t68 can be up to 0.01 at temperatures of 40 C and above; differences of 0.002-0.007 occur across the standard range of ocean temperatures (-10 - 30 C). The International Equation of State of Seawater 1980 (EOS-80, UNESCO, 1981) and the Practical Salinity Scale (PSS-78) were both based on IPTS-68, while the Thermodynamic Equation of Seawater 2010 (TEOS-10) is based on ITS-90. References: Barber, 1969, doi: 10.1088/0026-1394/5/2/001; UNESCO, 1981; Saunders, 1990, WOCE Newsletter, 10, September 1990. [CF-Standard Name]; unit: degC
 

Metadata

Metadata

File identifier
wdc-climate.de:2691298 XML
Metadata language

eng; USA
Hierarchy level
collection
Hierarchy level name

KNSC_hyd_v1.0
Date stamp
2013-08-15T13:57:13
Metadata standard name

ISO 19115
Metadata standard version

ISO 19115-2:2009
Point of contact
  University of Hamburg - Remon Sadikni
http://icdc.zmaw.de
Point of contact
  University of Hamburg - Remon Sadikni
http://icdc.zmaw.de
 
 

Overviews

Spatial extent

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Keywords


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