| Contributors | Affiliation | Role |
|---|---|---|
| Bisagni, James J. | University of Massachusetts Dartmouth (UMASSD-SMAST) | Principal Investigator |
| Groman, Robert C. | Woods Hole Oceanographic Institution (WHOI BCO-DMO) | BCO-DMO Data Manager |
Data Provider:
Dr. J. J. Bisagni
University of Massachusetts Dartmouth
School for Marine Science and Technology
200 Mill Rd., Suite 325
Fairhaven, MA 02719 USA
508-910-6328
jbisagni at umassd.edu
Note:
As a courtesy, please notify Jim Bisagni via email about your intent to use these data, so that he may keep a record.
Domain:
57.566 latitude top, 24.499 latitude bottom, -82.448 longitude left, -38.798 longitude right
Center latitude: 41.000, center longitude: -60.580
2048 x 2048 pixels
Special data fields are defined to enable the satellite images to be plotted in the MapServer interface including the following: x_pixel_unit (pixel size in the X direction in map units per pixel), y_pixel_unit (pixel size in the Y direction, which is usually negative map units per pixel), x_correction (rotation about the X axis in degrees), y_correction (rotation about the Y axis in degrees), x_coordinate (X coordinate of the center of the upper left pixel in longitude degrees), and y_coordinate (Y coordinate of the center of the upper left pixel in latitude degrees). These values are made accessible to the MapServer by including them as part of the data object. These six data fields correspond to the six lines in the so-called world file.
From Wikipedia (http://en.wikipedia.org/wiki/World_file), "a world file is a plain text computer data file used by geographic information systems (GIS) to georeference raster map images. The file specification was introduced by Esri.
Small-scale rectangular raster image maps can have an associated world file for GIS map software that describes the location, scale and rotation of the map. These world files are six-line files with decimal numbers on each line.
World files do not specify a coordinate system; this information is generally stored somewhere else in the raster file itself or in another companion file, e.g. Esri's .prj file. The generic meaning of world file parameters are:
This description is however misleading in that the D and B rotation parameters are not really rotations (in degrees or gradients) and in that as soon as D or B are not zero, the A and E parameters do not correspond to the pixel size any more."
The data object is served with two columns representing the satellite image. The clickable link in the "time" column links to the satellite image that includes a color bar and a clickable link to the actual digital values of the image. This image undergoes a transformation during the serving to include, among other things, the color bar.The overlay image is another representation of the satellite image but this one is used by the MapServer in order to create the overlay image of the satellite image on the display map. This image also undergoes a transformation (by a different procedure) to enable it to be transparent among other changes.
| File |
|---|
WNA_SST_2016.csv (Comma Separated Values (.csv), 1.01 MB) MD5:7e6945ab87be0872dbbdfd8775bab511 Primary data file for dataset ID 639087 |
| Parameter | Description | Units |
| images | Name of the NOAA satellite providing the images | n/a |
| description | Description of the NOAA satellite providing the AVHRR images | n/a |
| contributor | Name of the investigator providing the processed images. | n/a |
| x_pixel_unit | Pixel size in the X direction | map units per pixel |
| y_pixel_unit | Pixel size in the Y direction. This value is usually negative. | map units per pixel |
| x_correction | Rotation about the X axis | degrees |
| y_correction | Rotation about the Y axis | degrees |
| x_coordinate | X coordinate of the center of the upper left pixel | longitude degrees |
| y_coordinate | Y coordinate of the center of the upper left pixel | latitude degrees |
| month | Month | n/a |
| year | Four digit year | n/a |
| status | Status of the image such as reviewed (by investigator) | n/a |
| yrday_utc | UTC year day, starting with 001 as January 1 | three digits |
| day | UTC day of the month | two digits |
| time | UTC time of the image as hours, minutes and fraction of minutes | hhmm.mm |
| ISO_datetime_utc | UTC date and time formatted using the ISO standard | |
| overlay_image | Link to the satellite image to be used as the overlay image on the MapServer | gif image |
| color_bar | Color bar used for the AVHRR image representation of sea surface temperature. This scale is sometimes known as Pete's palette. | gif |
| Dataset-specific Instrument Name | AVHRR satellite |
| Generic Instrument Name | Advanced Very High Resolution Radiometer |
| Generic Instrument Description | "The AVHRR instrument consists of an array of small sensors that record (as digital numbers) the amount of visible and infrared radiation reflected and (or) emitted from the Earth's surface" (more information). |
| Website | |
| Platform | NOAA Satellites |
| Start Date | 2004-01-01 |
| End Date | 2018-12-31 |
| Description | Western North Atlantic (aka MCSST AFMIS)
Multiple satellites including NOAA-12, NOAA-15, NOA16, NOAA-17, NOAA-18, and NOAA-19 depending on the year.
NOAA-12: 2004, 2005, 2006
NOAA-15: 2004, 2005, 2006, 2007
NOAA-16: 2005, 2010,2011,2012, 2013
NOAA-17: 2007, 2008, 2009, 2010
NOAA-18: 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014-present
NOAA-19: 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014-present
Note:
The deployment (so far) is supposed to go through 2018 so the last "fix" is set to be in the future (2018). It was deemed a good idea by the data manager to make the deployment consistent with the data.
|
The U.S. GLOBEC Georges Bank Program is a large multi- disciplinary multi-year oceanographic effort. The proximate goal is to understand the population dynamics of key species on the Bank - Cod, Haddock, and two species of zooplankton (Calanus finmarchicus and Pseudocalanus) - in terms of their coupling to the physical environment and in terms of their predators and prey. The ultimate goal is to be able to predict changes in the distribution and abundance of these species as a result of changes in their physical and biotic environment as well as to anticipate how their populations might respond to climate change.
The effort is substantial, requiring broad-scale surveys of the entire Bank, and process studies which focus both on the links between the target species and their physical environment, and the determination of fundamental aspects of these species' life history (birth rates, growth rates, death rates, etc).
Equally important are the modelling efforts that are ongoing which seek to provide realistic predictions of the flow field and which utilize the life history information to produce an integrated view of the dynamics of the populations.
The U.S. GLOBEC Georges Bank Executive Committee (EXCO) provides program leadership and effective communication with the funding agencies.
U.S. GLOBEC (GLOBal ocean ECosystems dynamics) is a research program organized by oceanographers and fisheries scientists to address the question of how global climate change may affect the abundance and production of animals in the sea.
The U.S. GLOBEC Program currently had major research efforts underway in the Georges Bank / Northwest Atlantic Region, and the Northeast Pacific (with components in the California Current and in the Coastal Gulf of Alaska). U.S. GLOBEC was a major contributor to International GLOBEC efforts in the Southern Ocean and Western Antarctic Peninsula (WAP).
