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"Preliminary Results of Bio- Optical Measurements during ARMEX-II" Y. Pradhan, M Mohan, S. Nayak (SAC) D. Sengupta (IISc)

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Presentation on theme: ""Preliminary Results of Bio- Optical Measurements during ARMEX-II" Y. Pradhan, M Mohan, S. Nayak (SAC) D. Sengupta (IISc)"— Presentation transcript:

1 "Preliminary Results of Bio- Optical Measurements during ARMEX-II" Y. Pradhan, M Mohan, S. Nayak (SAC) D. Sengupta (IISc)

2 "Solar penetration in warm pool thermodynamics" D. Sengupta (IISc), Y. Pradhan, M. Mohan, P.A. Geda, S. Nayak (SAC) A. Lotliker(Goa Univ.)

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5 LiCOR SAT.

6 Total TOA SW radiation, [Watts m -2 ] TOA Radiation in 300-700nm range, [Watts m -2 ] Fraction, [%] 136764147% Wavelength Interval in nm Radiation in Watts m -2 Fraction of Solar constant (1367 W m -2 ) percent <40011908.7 400 – 700 52238.2 700 – 1000 30922.6 >100041730.5 Source: Thekaekara, 1976 R = Q 300 700 /Q sw

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8 WARM POOL I CRUISE (MARCH) 2003

9 Station St. #Position [E/N]Date 0174.00/12.66March 14 0272.70/12.07March 15 0372.20/11.87March 15 0471.75/09.98March 16 0572.65/08.28March 17 0672.66/08.28March 17 0772.65/08.28March 17 0872.65/08.28March 18 0972.66/08.29March 18 1072.66/08.28March 18 1174.45/09.19March 19 1275.33/09.63March 19 1376.00/07.89March 20 1474.50/09.21March 21 1574.50/09.21March 23 Station locations of concurrent bio-optical and physical measurement locations (SK191)

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13 WARM POOL II CRUISE (MAY-JUN) 2003 Buoy and Stn. Locations (17-22 May 2003) DS6 - 5 Mar - 31 Oct 2003 DS7 - 21 Apr - 31 Oct 2003 DS7A - 4 Mar - 29 Apr 2003

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29 18May19May20May Q lat -139.4-123.1-101.4 Q sw 207.6224.7237.1 Q net 17.050.085.6 Q pen 9.837.039.7

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35 Shortwave radiation budgets for March and April (in both clear sky & all sky conditions) at the surface and in the atmosphere derived from 5 Years (Feb 1985 – Dec 1988) of ERBE measurements. The units are in W m -2 with contour intervals of 10. Original data were obtained from 2.5°  2.5° gridded climatology provided by the International Research Institute (IRI) climate data centre.

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39 DateSurface(3 00-3300m) At MLD (300- 700nm) E d - (Just beneath the surface) MLD/Surf ace MLD/0 - 0 - /Surface May 18206.29.8106.94.8%9.2%51.9% May 19222.537.0122.216.6%30.3%54.9% May 20237.939.7140.916.7%28.2%59.2%

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