Doctoral thesis defence: Earth Sciences

Doctoral thesis defence of about 50 slides on the ice of Svalbard measured from space: cover with a 3D satellite, a map of the area that travels, 3D instruments, method, results with charts, discussion, conclusions, conference attendance with the map flying from one to the next, derived publications, other merits and backup slides for the committee's questions.

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Cover of the presentation “Doctoral thesis defence: Earth Sciences”

What’s inside

  1. Measuring ice from space: mass balance of Svalbard's glaciers using laser altimetry and satellite gravimetry
  2. billion tonnes of ice lost per year by Svalbard's glaciers between 2018 and 2024
  3. What I will talk about
  4. Introduction
  5. Melting ice raises the sea
  6. Svalbard · one click, one place
  7. Measuring an entire archipelago is hard
  8. What was already known
  9. No one had combined laser and gravity across all of Svalbard.
  10. Three objectives
  11. Data and instruments
  12. ICESat-2: a laser that counts photons
  13. GRACE-FO: two satellites that weigh each other
  14. Landsat 8: the glacier's photograph
  15. Together, they measure what none can alone
  16. Three summers at Kongsvegen
  17. The data, in a table
  18. From satellites to a figure
  19. Method
  20. Turning height into mass
  21. Merging: each measurement corrects the other
  22. What must be corrected first
  23. How confident I am in the figure
  24. Check against field measurements
  25. Results
  26. Result 1 · Svalbard loses 9.8 billion tonnes a year
  27. Result 2 · Not all glaciers lose equally
  28. Result 2 on the map · one click, one glacier
  29. Result 3 · Loss is greater at low altitude
  30. Result 4 · Summer weighs more than the front
  31. Comparison with other studies
  32. −9.8 billion tonnes lost per year
  33. Discussion
  34. Discussion
  35. Each year, Svalbard raises the sea by 0.03 mm
  36. Limitations and future work
  37. Three contributions of the thesis
  38. Combining laser and gravity measures Svalbard's ice with half the uncertainty.
  39. Scientific output
  40. Open code and data
  41. Conference attendance · six cities, three continents
  42. Conferences I have taken part in
  43. Publications derived from the thesis
  44. Other merits during the doctorate
  45. Four years of work
  46. Thank you
  47. Why ICESat-2 and not CryoSat-2, which uses radar?
  48. How does ground rebound affect gravity?
  49. Would the method work elsewhere, such as Greenland?
  50. What if clouds bias the laser data?

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