Biological production in the Indian Ocean upwelling zones –Part 1: refined estimation via the use of a variable compensation depth in ocean carbon models

Sreeush, Mohanan Geethalekshmi; Valsala, Vinu; Pentakota, Sreenivas; Prasad, Koneru Venkata Siva Rama; Murtugudde, Raghu

doi:https://doi.org/10.5194/bg-15-1895-2018

Articles | Volume 15, issue 7

https://doi.org/10.5194/bg-15-1895-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/bg-15-1895-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 15, issue 7

Research article

|

03 Apr 2018

Research article |

| 03 Apr 2018

Biological production in the Indian Ocean upwelling zones –Part 1: refined estimation via the use of a variable compensation depth in ocean carbon models

Mohanan Geethalekshmi Sreeush, Vinu Valsala, Sreenivas Pentakota, Koneru Venkata Siva Rama Prasad, and Raghu Murtugudde

Supplement

https://doi.org/10.5194/bg-15-1895-2018-supplement

Data sets

Takahashi data LDEO http://www.ldeo.columbia.edu/res/pi/CO2/

SeaWiFS data NASA https://oceancolor.gsfc.nasa.gov/SeaWiFS/

GFDL data for OTTM NOAA http://data1.gfdl.noaa.gov/nomads/forms/assimilation.html

OCMIP-II routines OCMIP http://ocmip5.ipsl.jussieu.fr/OCMIP/

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Short summary

A simple modification to the existing methodology for calculating biological production in global ocean model is proposed here. A space- and time-varying production depth is found in the upper few metres of the ocean based on sunlight and nutrient availability. This new method is tested for Indian Ocean biological production zones. With this new method the carbon cycling in the surface of the Indian Ocean is simulated better in the model. A reason for the improvement is detailed in the paper.