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Arctic Regional Climatology
Please note that this is a preliminary version of the regional climatology which will be replaced.

A set of mean fields for temperature and salinity for the Arctic Seas and environs are available for viewing and downloading.

Area: The area encompassed is all longitudes from 60°N to 90°N latitudes.

Horizontal resolution: Temperature and salinity are available on a 1°x1° and a 1/4°x1/4° latitude/longitude grid.

Time resolution: All climatologies for all variables use all available data regardless of year of measurement. Climatologies were calculated for annual (all-data), seasonal, and monthly time periods. Seasons are as follows: Winter (Jan.-Mar.), Spring (Apr.-Jun.), Summer (Jul.-Sep.), Fall (Oct.-Dec.).

Vertical resolution: Temperature and salinity are available on 87 standard levels with higher vertical resolution than the World Ocean Atlas 2009 (WOA09), but levels extend from the surface to 4000 m.

Additional fields: In addition to climatological mean fields, fields of statistical means (before objective analysis), standard deviation, standard error, data distribution, observed minus analyzed, and difference of time period from annual climatological mean, are also available.

Units: Temperature units are °C. Salinity is unitless on the Practical Salinity Scale-1978 [PSS].

Data used: All data from the area found in the World Ocean Database (WOD) as of the end of 2011. For a description of this dataset, please see World Ocean Database 2009 Introduction

Bathymetry used: For the 1° and 1/4° climatologies, the mean value within a grid square from the ETOPO2 was used.

Method: The method followed for calculation of the mean climatological fields is detailed in the following publications: Temperature: Locarnini et al., 2010, Salinity: Antonov et al., 2010.

Additional details on the 1/4° climatological calculation are found in Boyer et al., 2005.

The table from this publication giving radius of influence for the analysis procedure can be filled out with values for the 1/4° procedure as follows:

Pass1° radius of influence1/4° radius of influence
1892 km321 km
2669 km267 km
3446 km214 km

Data formats: Data are presented in a comma separated value (csv) format which gives lat/lon of the center of a grid box and the value at each depth in that grid box. Data are also presented in an ArcGIS compatible format .

References:

Antonov, J. I., D. Seidov, T. P. Boyer, R. A. Locarnini, A. V. Mishonov, H. E. Garcia, O. K. Baranova, M. M. Zweng, and D. R. Johnson, 2010: World Ocean Atlas 2009, Volume 2: Salinity. S. Levitus, Ed. NOAA Atlas NESDIS 69, U.S. Government Printing Office, Washington, D.C., 184 pp.

Boyer, T., S. Levitus, H. Garcia, R. A. Locarnini, C. Stephens, J. Antonov, 2005: Objective analyses of annual, seasonal, and monthly temperature and salinity for the world ocean on a 0.25 degree grid. Int. J. Clim., 25, 931-945.

Boyer, T. P., J. I. Antonov , O. K. Baranova, H. E. Garcia, D. R. Johnson, R. A. Locarnini, A. V. Mishonov, T. D. OBrien, D. Seidov, I. V. Smolyar, M. M. Zweng, 2009: World Ocean Database 2009. S. Levitus, Ed., NOAA Atlas NESDIS 66, U.S. Gov. Printing Office, Wash., D.C., 216 pp.

Locarnini, R. A., A. V. Mishonov, J. I. Antonov, T. P. Boyer, H. E. Garcia, O. K. Baranova, M. M. Zweng, and D. R. Johnson, 2010: World Ocean Atlas 2009, Volume 1: Temperature. S. Levitus, Ed. NOAA Atlas NESDIS 68, U.S. Government Printing Office, Washington, D.C., 184 pp.