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

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Presentation transcript:

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

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

LiCOR SAT.

Total TOA SW radiation, [Watts m -2 ] TOA Radiation in nm range, [Watts m -2 ] Fraction, [%] % Wavelength Interval in nm Radiation in Watts m -2 Fraction of Solar constant (1367 W m -2 ) percent < – – > Source: Thekaekara, 1976 R = Q /Q sw

WARM POOL I CRUISE (MARCH) 2003

Station St. #Position [E/N]Date /12.66March /12.07March /11.87March /09.98March /08.28March /08.28March /08.28March /08.28March /08.29March /08.28March /09.19March /09.63March /07.89March /09.21March /09.21March 23 Station locations of concurrent bio-optical and physical measurement locations (SK191)

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

18May19May20May Q lat Q sw Q net Q pen

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.

DateSurface( m) At MLD ( nm) E d - (Just beneath the surface) MLD/Surf ace MLD/ /Surface May %9.2%51.9% May %30.3%54.9% May %28.2%59.2%