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teaching:radiative_transfer:cloudbow

Impact on cloud optical thickness and droplet size on radiance field, visibility of cloudbow

Calculate the upwelling radiance at 500nm the top of the atmosphere for an atmosphere including a liquid water cloud layer. Use the discrete ordinate method with intensity correction for your simulation (rte_solver disort2). Vary the cloud optical thickness (wc_set_tau) and effective droplet size (in wc.dat) and describe the results.

Hints:

  • Use the libRadtran input file and the plotting script from exercise 6 to start.
  • Look at exercise 8 to see how a cloud layer is defined in libRadtran.

Varying Droplet Size:

TOA, Sun at Zenith, Upwelling Radiation at 500 nm, Cloud 2-3 km, LWC 0.01, Droplet Radius 2 mu
TOA, Sun at Zenith, Upwelling Radiation at 500 nm, Cloud 2-3 km, LWC 0.01, Droplet Radius 10 mu
TOA, Sun at Zenith, Upwelling Radiation at 500 nm, Cloud 2-3 km, LWC 0.01, Droplet Radius 25 mu

Varying Wavelength:

TOA, Sun at Zenith, Upwelling Radiation at 350 nm, Cloud 2-3 km, LWC 0.01, Droplet Radius 25 mu
TOA, Sun at Zenith, Upwelling Radiation at 750 nm, Cloud 2-3 km, LWC 0.01, Droplet Radius 25 mu
TOA, Sun at Zenith, Upwelling Radiation at 350nm (blue), 500nm (yellow) 750 nm (red), Cloud 2-3 km, LWC 0.01, Droplet Radius 25 mu

Varying LWC:

TOA, Sun at Zenith, Upwelling Radiation at 500 nm, Cloud 2-3 km, LWC 0.001, Droplet Radius 10 mu
TOA, Sun at Zenith, Upwelling Radiation at 500 nm, Cloud 2-3 km, LWC 0.01, Droplet Radius 10 mu
TOA, Sun at Zenith, Upwelling Radiation at 500 nm, Cloud 2-3 km, LWC 0.25, Droplet Radius 10 mu
TOA, Sun at 30°, Upwelling Radiation at 500 nm, Cloud 2-3 km, LWC 0.01, Droplet Radius 10 mu
teaching/radiative_transfer/cloudbow.txt · Last modified: 2018/05/04 08:40 (external edit)