06 Sun Radiation

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Transcript of 06 Sun Radiation

  • OSEANOGRAFI FISIKA VI

  • Kecepatan Cahaya :

    Di vakum 300.ooo km/dtk

    Di Alam tgtg dan frek (v) c = .c

  • Peran sinar matahari di laut : Memanaskan air laut

    Menghangatkan lapisan permukaan

    Energi untuk phytplankton

    Navigasi hewan dekat permukaan

    Pemetaan backscatter ex: klorofil

    Sun Earth~1026 cal/s 2,00 cal/cm2 min

    Berfluktuasi : Aphelion (1,93)Perihelion (2,08)

  • Kenapa Jumlahnya berbeda?? Adsorption H2O, CO2, O3

    UV (

  • Radiasi gel panjang (Thermal wave) emisi awan danatm

    Garis Fraunhofer

  • Dalam sifat optik air laut yang dikaji hanya rad. matahari pada gel. pendek yang tiba di muka laut (Io).

    Dimana Is = radiasi langsung

    Id = radiasi angkasa diffuse

    Is dan Id bervariasi :

    ketinggian matahari

    komposisi atm

  • Short-Wave Back Radiation from Water to Air

    Skema Short-Wave back Radiation (Ib)

    Reflected & Scattered

    Interface

    Udara

    Air

    Menambah fluks ke atm(Ib)

  • Ib depends on

    Amount of scatter and reflected radiation within the water, that is, on turbidity (Suspended matter, plankton, dust, air bubbles, etc)

    Sun altitude (angle of direct solar)

    Measurement of Iu (undersurface) easy made than Ib(surface) agitated by wave

  • Extinction of Solar RadiationRadiation that penetrates of surface progressively diminished by extinction as result of:

    Adsorption by pure water (k)

    Adsorption by suspended and dissolved matter (k)

    Scattering in pure water ()

    Scattering (diffraction, reflection) by suspended and dissolved matter ()

    These Component Which determine the extinction coefficient () depend on

  • Total intensity (Iz) at a depth (z) given by :

    Where Is total intensity in surface

    For Individual Wavelength

  • What is the conclusions you get from the figure 3.18 ??

  • Extinction of light in Pure Water Pure water before Salt Water

    0,47

  • Extinction of Light In Sea Water of Different Turbidity Scattering ( ) and adsorption (k ) by turbid water contribution in fluctuating by place and time

    In open ocean, turbidity depend on :

    Origin of water masses

    General oceanic circulation

  • s observed extinction coefficient

    extinction coefficient in pure water

    Atlantic water

  • Figure 3.21 Distribution of vertical extinction coefficient of surface water in theAtlantic Ocean. The value are multiple by 100

  • Figure 3.22 Decrease of light intensity with depth at different location

    Sargasso Sea

    Continental Slope

    Continental Shelf

    Costal Area

  • Character of light extinction in different type of ocean water

    Turbid Costal water (green-yelow)

    Oceanic water (blue)

  • Increasing turbidity in open ocean and costal extinction short-wave become more significant its result from Yellow Substance

    Spectral extinction in costal water (1) before and (2) after filtering , in (3) Comparison with double-distilled water

    Spectral extinction in Oceanic water (1) before and (2) after filtering , in (3) Comparison with double-distilled water

    Differences cause by FPTM (FilterPassing Turbidity Material) Ex Dissolved Organic Substance

  • The Color Of The Sea Coefficient Extinction of sun radiation

    Depth Shallow or Depth Water

    Organism Red Sea

    Sediment Yellow Sea