Conceptual approach to measure the potential of Urban Heat Islands from Landuse datasets and Landuse projections Christian Daneke, Benjamin Bechtel, Jürgen Böhner,Thomas Langkamp, Jürgen Oßenbrügge - University Hamburg

1. 19.06.2011 Climate Researchin Hamburg

2. Conceptual approach to measure the potential of Urban Heat Islands from Landuse datasets and Landuse projections Christian Daneke, Benjamin Bechtel, Jürgen Böhner, Thomas Langkamp, Jürgen Oßenbrügge Universität Hamburg 19.06.2011

3. Introduction Why doweneed an UHI LandscapeMetric? Method Howdoesitwork? Calibrationand Validation Howwelldoesitwork? Conclusion Applyingthemetricto Hamburg Outlook 3 Christian Daneke 19.06.2011

4. Urban Surfaceshave an impact on thelocalclimateandbychangingthisinfluencechangesaswell 4 Christian Daneke 19.06.2011 Oßenbrügge & Bechtel (2010)

5. Whatistheproblemandwhy do weneed an UHI-Potential LandscapeMetric? 5 Christian Daneke 19.06.2011

6. Landuse Dataset for Hamburg Metropolitan Region based on ClassificationScheme 6 Christian Daneke 19.06.2011 Resolution 100 m 24Classesin Total, 10 Urban Classes Createdfor: 1960, 1990, 2005 Based on: Aerial Photographs, TopographicMaps, Corine, ATKIS, 3D-Building Data Daneke (2011)

8. Morphology

9. Neighborhood

10. Patch Shape

11. Patch Size

13. Including all requirementsneededfor UHI potential

14. Assumefollowinglandusewithtwoclasses

15. Resistance

17. In thiscaseresistance

18. Green= 1000

19. Red= 1The calculationofthemetric in a nutshell 9 Christian Daneke 19.06.2011 𝐴′=𝑤i 𝑎0

21. Andthecellsweightedaccordingtothedistancetothecentroid𝑟′= 𝐴′/𝜋 𝑣=exp(−𝑟′𝑟0)

23. Andthecellsweightedaccordingtothedistancetothecentroid𝑟′= 𝐴′/𝜋 𝑣=exp(−𝑟′𝑟0)

25. Compactness (V)

26. Fraction (F)

27. Final valuescalculatedby:𝑠=0∞𝑣𝑓𝑑𝑟 𝐾𝑂𝑉= 𝑠𝑟0𝑧

29. Parameters:

30. FractionofInfluence

31. Resistance

32. Search radius: 1,5 pixels

34. On a 1 km Grid

35. Plantssampledandanalysediftheyprefer „warm“ or „cold“Bechtel (2011)

37. R = 0,662

38. R2 = 0,438

39. Onlycellswhichhavemorethan 25 % builtupareaPlant IndicatorTemperature Values Urban Heat Island Potential

41. Relativelygoodfitswithinthecity

42. Problems

43. Water

45. Relativelygoodfitswithinthecity

46. Problems

47. Water

50. ThankYou! Dipl.-Geogr. Christian Daneke christian.daneke@uni-hamburg.de Institut für Geographie Universität Hamburg Bundesstraße 55 20146 Hamburg

51. The Urban Heat Island in Hamburg, aspresentedduringthe last summer 21 Christian Daneke 19.06.2011 Wetterspiegel (2010)

52. MorphologicalClassificationSchemeforLanduse-Datasets needed in UHI relatedstudies 22 Christian Daneke 19.06.2011 Daneke (2011)