Greenness maps - Initial evaluation

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The FAO Senior Locust Forecasting Officer, Keith Cressman, presented an initial evaluation of the dynamic greenness maps developed by the Dept. of Environmental Sciences and Land Use Planning / Environmetrics and Geomatics at the Université catholique de Louvain (UCL), Louvain-le-Neuve, Belgium. The dynamic green vegetation map includes both the spatial and temporal information in one geotiff-formatted file suitable for analysis within the SWARMS GIS. The map shows the evolution of vegetation development for the previous 11 decades (i.e. eleven 10-day periods) for each 250m pixel, indicated in varying shades of red, orange and green. The product informs the user, in this case FAO’s Locust Forecasting Officer, of the spatial-temporal variations of the green vegetation and indirectly of the rainfall distribution through vegetation development. This allows the onset of green vegetation, and ephemeral vegetation (false starts), and the disappearance of vegetation at the end of its developmental cycle to be identified. It also indicates the location of evergreen vegetation that is of less importance to Desert Locust. The reporter presented his initial assessment of the new product, indicating some recession areas where vegetation changes are not detected.

Technology Travel

Dynamic greenness maps:
An initial evaluation
Algerian Sahara
Mauritania Sahel
Pakistan summer breeding
Yemen Red Sea coast
Yemen interior

Keith Cressman
FAO Senior Locust Forecasting Ofﬁcer
October 2008

Wednesday, 11 January 12

Algeria

non-seasonal sporadic rainfall in hyper-arid areas (11-20 July 2008)
Wednesday, 11 January 12

Landsat
UCL

Algerian Sahara

Wednesday, 11 January 12

Mauritania

seasonal rainfall N Sahel summer breeding areas (1-10 Sep 2008)
Wednesday, 11 January 12

Mauritania interior

Mauritania interior

Landsat
UCL
Wednesday, 11 January 12

Pakistan

SW Asia monsoon rainfall in summer breeding areas (1-10 July 2008)
Wednesday, 11 January 12

MODIS

Pakistan

India
nal
Ca
an
th
jas
Ra

Wednesday, 11 January 12

Landsat

Pakistan

India
nal
Ca
an
th
jas
Ra

Wednesday, 11 January 12

Yemen

rainfall on Red Sea coast in breeding areas (1-10 July 2008)
Wednesday, 11 January 12

sandy rocky
Red Sea
coastal plains highlands

Wednesday, 11 January 12

Landsat
UCL

Yemen Red Sea coast

Wednesday, 11 January 12

Yemen

sporadic rainfall in summer breeding areas (21-30 June 2008)
Wednesday, 11 January 12

Landsat
UCL

Yemen interior

Yemen interior

Wednesday, 11 January 12

Initial impressions of the UCL product

non-seasonal sporadic rainfall
in hyper-arid areas misses green vegetation
(Algerian Sahara)

seasonal rainfall
misses green vegetation in north
in N Sahel summer breeding areas
better in south
(Mauritania)

SW Asia monsoon rainfall
some vegetation changes detected
in summer breeding areas
other vegetation?
(Pakistan)

rainfall on Red Sea coast
difﬁcult to detect annual vegetation
in breeding areas
better in cropping areas
(Yemen)

sporadic rainfall
more reliable in cropping areas
in summer breeding areas
than in desert
(Yemen)

Wednesday, 11 January 12

Phase 2
further reﬁnement according to area and time of year

hyper-arid areas in the Sahara (all year)
northern Sahel, Indo-Pakistan,Yemen interior (summer)
Red Sea coast (all year)

Wednesday, 11 January 12

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Greenness maps - Initial evaluation

1. Dynamic greenness maps: An initial evaluation Algerian Sahara Mauritania Sahel Pakistan summer breeding Yemen Red Sea coast Yemen interior Keith Cressman FAO Senior Locust Forecasting Ofﬁcer October 2008 Wednesday, 11 January 12

2. Algeria non-seasonal sporadic rainfall in hyper-arid areas (11-20 July 2008) Wednesday, 11 January 12

3. Algeria non-seasonal sporadic rainfall in hyper-arid areas (11-20 July 2008) Wednesday, 11 January 12

4. MODIS Wednesday, 11 January 12

5. MODIS UCL Wednesday, 11 January 12

6. Landsat UCL Wednesday, 11 January 12

7. Landsat UCL Wednesday, 11 January 12

8. MODIS UCL Wednesday, 11 January 12

9. Landsat UCL Wednesday, 11 January 12

10. Landsat UCL Algerian Sahara Wednesday, 11 January 12

11. Mauritania seasonal rainfall N Sahel summer breeding areas (1-10 Sep 2008) Wednesday, 11 January 12

12. Mauritania seasonal rainfall N Sahel summer breeding areas (1-10 Sep 2008) Wednesday, 11 January 12

13. UCL Wednesday, 11 January 12

14. UCL Wednesday, 11 January 12

15. MODIS Wednesday, 11 January 12

16. MODIS UCL Wednesday, 11 January 12

17. Landsat UCL Wednesday, 11 January 12

18. Landsat UCL Wednesday, 11 January 12

19. Landsat UCL Wednesday, 11 January 12

20. MODIS UCL Wednesday, 11 January 12

21. Landsat UCL Wednesday, 11 January 12

22. Landsat UCL Wednesday, 11 January 12

23. Landsat UCL Wednesday, 11 January 12

24. MODIS Wednesday, 11 January 12

25. MODIS UCL Wednesday, 11 January 12

26. Landsat Wednesday, 11 January 12

27. Landsat UCL Wednesday, 11 January 12

28. Mauritania interior Mauritania interior Landsat UCL Wednesday, 11 January 12

29. Pakistan SW Asia monsoon rainfall in summer breeding areas (1-10 July 2008) Wednesday, 11 January 12

30. Pakistan SW Asia monsoon rainfall in summer breeding areas (1-10 July 2008) Wednesday, 11 January 12

31. MODIS Pakistan India nal Ca an th jas Ra Wednesday, 11 January 12

32. MODIS UCL Wednesday, 11 January 12

33. Landsat Pakistan India nal Ca an th jas Ra Wednesday, 11 January 12

34. Landsat UCL Wednesday, 11 January 12

35. Yemen rainfall on Red Sea coast in breeding areas (1-10 July 2008) Wednesday, 11 January 12

36. Yemen rainfall on Red Sea coast in breeding areas (1-10 July 2008) Wednesday, 11 January 12

37. sandy rocky Red Sea coastal plains highlands Wednesday, 11 January 12

38. MODIS Wednesday, 11 January 12

39. MODIS UCL Wednesday, 11 January 12

40. Landsat UCL Wednesday, 11 January 12

41. Landsat UCL Wednesday, 11 January 12

42. MODIS Wednesday, 11 January 12

43. MODIS UCL Wednesday, 11 January 12

44. Landsat UCL Wednesday, 11 January 12

45. Landsat UCL Yemen Red Sea coast Wednesday, 11 January 12

46. Yemen sporadic rainfall in summer breeding areas (21-30 June 2008) Wednesday, 11 January 12

47. Yemen sporadic rainfall in summer breeding areas (21-30 June 2008) Wednesday, 11 January 12

48. MODIS Wednesday, 11 January 12

49. MODIS UCL Wednesday, 11 January 12

50. Landsat Wednesday, 11 January 12

51. Landsat UCL Wednesday, 11 January 12

52. Landsat UCL Wednesday, 11 January 12

53. MODIS UCL Wednesday, 11 January 12

54. Landsat UCL Wednesday, 11 January 12

55. Landsat UCL Yemen interior Yemen interior Wednesday, 11 January 12

56. Initial impressions of the UCL product non-seasonal sporadic rainfall in hyper-arid areas misses green vegetation (Algerian Sahara) seasonal rainfall misses green vegetation in north in N Sahel summer breeding areas better in south (Mauritania) SW Asia monsoon rainfall some vegetation changes detected in summer breeding areas other vegetation? (Pakistan) rainfall on Red Sea coast difﬁcult to detect annual vegetation in breeding areas better in cropping areas (Yemen) sporadic rainfall more reliable in cropping areas in summer breeding areas than in desert (Yemen) Wednesday, 11 January 12

57. Phase 2 further reﬁnement according to area and time of year hyper-arid areas in the Sahara (all year) northern Sahel, Indo-Pakistan,Yemen interior (summer) Red Sea coast (all year) Wednesday, 11 January 12

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