Restrictions | Details | Caveats | File Naming | Citation | References | Original Source | Contact
This dataset cannot be redistributed outside PSD!!
- Sea Level
- Do not redistribute file outside of PSD!
- Sea Surface Temperature (SST) analysis for climate monitoring at JMA was updated to a new method based on in-situ observations in March 2006. For details of the analysis, refer to Ishii et al. (2005). SST analysis has a resolution of 1º latitude and 1º longitude. The east-west grid points start eastward from 0.5ºE to 0.5ºW, while the north-south grid points start northward from 89.5ºS to 89.5ºN. The analysis uses the optimum interpolation method, and the deviation of the previous day's analysis from normal is multiplied by 0.95 and used as a first guess. The analysis is performed daily using marine meteorological data for the seven-day period spanning the three days before and after the day in question. The data observed for each day are averaged in 1.5º x 1.5º boxes before being analyzed using the optimum interpolation method to save processing time. The bias corrections for past SST observation reports were performed using the method of Folland and Parker (1995). Quality control of the observed data is performed by checking the ship tracks, dates and positions of reports, and any erroneous data are automatically corrected in compilation of marine meteorological data at JMA. Moreover, for observed data deviations from climatological values during the period spanning one month before and after the day in question, the biases of data with the same ship call signs are estimated, and call signs with large data biases are compiled automatically into a blacklist in the daily analysis. This analysis is performed with a delay of 31 days from real time to allow the data observed in previous two months to be checked. For real-time utilization, the analyses of the past 30-day period are subsequently performed every day, with the fist guesses given by the most recent analyses. See webpage for more information.
- var.time.stat.nc (In directory: /Datasets.private2/COBE/)
Dataset Format and Size:
Dataset format and size:
- PSD standard NetCDF 380 Mbyte file for monthly file. /Datasets.private2/COBE/sst.mnmean.nc
- PSD standard NetCDF 3.1 Mbyte file for long term monthly mean file: /Datasets.private2/COBE/sst.mon.ltm.nc
- Missing grids are 1e20.
- Missing grids are 9.999e+20 (ltm).
- Ishii et al. (2005) (see below)
- Folland, C. K. and D. E. Parker, 1995: Correction of instrumental biases in historical sea surface temperature data. Q. J. R. Meteorol. Soc., 121, 319-367.
- Ishii, M., A. Shouji, S. Sugimoto, and T. Matsumoto, 2005: Objective Analyses of Sea-Surface Temperature and Marine Meteorological Variables for the 20th Century using ICOADS and the Kobe Collection. Int. J. Climatol., 25, 865-879.
- Japan Meteorological Agency, 2006: Characteristics of Global Sea Surface Temperature Analysis Data (COBE-SST) for Climate Use. Monthly Report on Climate System Separated Volume, 12, 116pp.
Japanese Oceanographic Data Center
http://ds.data.jma.go.jp/tcc/tcc/products/elnino/cobesst/cobe-sst.html (replacing old source http://near-goos1.jodc.go.jp/cgi-bin/1997/near_goos_catalog?projectname=NEAR-GOOS.
Physical Sciences Division: Data Management
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