1) To answer the remaining questions, go to Global Primary Productivity Maps at:

Question

1)      To answer the remaining questions, go to Global Primary Productivity Maps at:

http://www.nature.com/scitable/knowledge/library/the-biological-productivity-of-the-ocean-70631104

Scroll down at this webpage to Figure 4. The top two images show chlorophyll concentrations for July/August/September (Summer – Fall in the northern hemisphere) and January/ February/ March (Winter in the northern hemisphere.)

Note: If you are having problems accessing this website the seasonal primary production maps needed to complete this assignment are available at the bottom of this assignment.

Or you may go to the following website and page through the monthly Primary Productivity maps for January –December 2014. In these displays the color scales is more muted. The light areas are area of high productivity and the darker blue area are areas of low productivity.

http://neo.sci.gsfc.nasa.gov/view.php?datasetId=MY1DMM_CHLORA&year=2014

4a) How are these seasonal primary production maps constructed (what data is used)?

Note: for more about how the primary production maps are constructed, go to:

                       http://www.science.oregonstate.edu/ocean.productivity/

or

http://neo.sci.gsfc.nasa.gov/view.php?datasetId=MY1DMM_CHLORA&year=2014

4b) What is seasonal primary productivity?

Also, read the Chapter 9 Essay: - Ocean Color and Marine Productivity

Explanation / Answer

4a) How are these seasonal primary production maps constructed (what data is used)?

Global maps of Seasonal Primary Production (SPP) constructed based plants from climate data of vegetation greenness and solar radiation absorption. SPP is the difference between CO2 absorbed by plants during photosynthesis and CO2 by plants during respiration. SPP is foundation for food, fibre and fuel from plants.

SPP is Globally increased by 6% from 1982 to 1999.

The seasonal Primary Production maps constructed from the data obtained by satellites. Satellite sensors absorb reflected sunlight strength data from chlorophyll content in ocean water and from plants in the form of pixels. Based on the concentration of chlorophyll concentration the pixel values changes and each value gives different colours. These colours of light color shows more chlorophyll content and dark colour shows less chlorophyll content.

4b) What is seasonal primary productivity?

SPP is the difference between CO2 absorbed by plants during photosynthesis and CO2 by plants during respiration

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