Title: Sea Surface Temperatures - Day 363 (degrees C)
Type of Map: raster Number of Categories: 255
Rows: 2250
Columns: 4500
Total Cells: 10125000
Projection: Latitude-Longitude (zone 0)
N: 90N S: 90S Res: 0:04:48
E: 180E W: 180W Res: 0:04:48
Data Source:
These data were obtained from the Physical Oceanography DAAC @ J
Propulsion Laboratory/California Institute of Technology. 1993.
Data Description:
Generated by r.resample
Comments:
This file represents the "monthly mean distributions of sea surf
temperature. The raw data was derived from the Advanced Very Hi
Resolution Radiometer (AVHRR) carried aboard the NOAA-series pol
orbiting satellites...These data cover a period from...1981-1986
The MCSST [multichannel sea surface temperatures] data
...was produced from the NOAA NESDIS [National Environmental
Satellite, Data and Information Service] MCSST retrievals, by th
University of Miami, School of Marine and Atmospheric Sciences
(UM/RSMAS) and by the Physical Oceanography Distributed Active
Archive Center (PO.DACC) at the Jet Propulsion Laboratory (JPL).
The MCSST values were binned (daytime and nighttime were binned
separately) into a global, equal-angle grid which is 1024 lines
2048 samples. The spatial resolution is approximately 18Km-by-1
at the Equator. For each grid point, the average of all MCSST
measurements for one week was computed (p.1)." "All missing val
were interpolated using an iterative Laplacian relaxation techni
A first guess for open areas (areas of missing data) is provided
computing the mean of horizontal bounding "good" data-filled pix
Resulting interpolated data fields are then smoothed. The
interpolation uses a bounding developed from NIMBUS-7 Scanning
Multichannel Microwave Radiometer (SMMR) data. A mask is created
using the minimal ice extent for both hemispheres and combining the
months of March and September for 1984, 1985 and 1986. The mask is
used as a numerical boundary for the interpolator and attracts the
values towards -1.8 degrees Celsius. The minimal ice extent mask
includes those areas that are always covered by ice (at least from
the SMMR years considered)" (p.9).
The above information is quoted from pages 1 and 9 of the following:
Tran, Andy V., E. Smith, J. Hyon, R. Evans, O. Brown and G. Feldman
1993 Satellite Derived Multichannel Sea Surface Temperature and
Phytoplankton Pigment Concentration Data: A CD-ROM Set Containing
Monthly Mean Distributions for the Global Oceans. Jet Propulsion
Laboratory and California Institute of Technology.
Processed to GRASS by M. Crowley at the Institute for Marine and
Coastal Sciences, Cook College, Rutgers University, New Brunswick, NJ.
Editing completed at the Center for Remote Sensing and Spatial
Analysis, Cook College, Rutgers University, New Brunswick,
New Jersey, USA by: L. Rakos & M. Stallings.
COPYRIGHT 1994: CERL and Rutgers University, Cook College,
All rights reserved. Permission to copy this data is
granted as long as the sources; data developers, CERL,
Rutgers University, are acknowledged.