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CALIPSO

CALIPSO. Ben Kravitz November 5, 2009. What is CALIPSO?. CALIPSO is (among a couple of other things) a space-based LIDAR Launched in 2005 Flies on the A-train. What CALIPSO does. Statistics on the vertical structure of clouds

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CALIPSO

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  1. CALIPSO • Ben Kravitz • November 5, 2009

  2. What is CALIPSO? CALIPSO is (among a couple of other things) a space-based LIDAR Launched in 2005 Flies on the A-train

  3. What CALIPSO does • Statistics on the vertical structure of clouds • Geographic and vertical distribution of aerosols around the world • Detection of sub-visible cirrus and polar stratospheric clouds • Indirect estimate of the radiative contribution of aerosols

  4. Technical Specifications • 532 nm: 2 orthogonal channels • 1064 nm: 1 channel

  5. Advantages of Space-Based LIDAR • Doesn’t have to worry about low clouds getting in the way of observations of the upper troposphere • Can survey more than one area

  6. Sample CALIPSO retrievals Text http://www-calipso.larc.nasa.gov/products/lidar/browse_images/show_calendar.php

  7. Each page has approx. 34 images on it Path of the satellite on the specified day Also has images of just daytime and just nighttime

  8. Polar stereographic projections

  9. Clickable pieces of the orbits We’ll click on the blue section of the first picture

  10. We get 9 more images The blue section is now highlighted (to remind us what we clicked)

  11. Polar projections This orbit does pass over the Antarctic, but that’s not the part we clicked This orbit doesn’t pass over the Arctic

  12. First main image: 532 nm total backscatter

  13. Second image: 532 nm perpendicular backscatter

  14. Third image: 532 nm depolarization ratio

  15. Fourth image: 1064 nm backscatter

  16. Fifth image: Attenuated Color Ratio

  17. Sixth image: Vertical Feature Mask

  18. So let’s look at some interesting features

  19. We’ll go through two of the (four) colors on this one

  20. Purple Strip

  21. Purple Strip

  22. Purple Strip

  23. Purple Strip

  24. Purple Strip

  25. Purple Strip

  26. Green Strip

  27. Green Strip

  28. Green Strip

  29. Green Strip

  30. Green Strip

  31. Green Strip

  32. Occasionally you’ll get something that looks like this

  33. Notice the really interesting feature over the green/red area (Antarctica)

  34. More fun stuff

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