Conceptual approach to measure the potential of Urban Heat Islands from Landuse datasets and Landuse projections

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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

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  • 0163 7563488
  • Conceptual approach to measure the potential of Urban Heat Islands from Landuse datasets and Landuse projections

    1. 1. 19.06.2011<br />Climate Researchin Hamburg<br />
    2. 2. Conceptual approach to measure the potential of Urban Heat Islands from Landuse datasets and Landuse projections<br />Christian Daneke, Benjamin Bechtel, Jürgen Böhner, Thomas Langkamp, Jürgen Oßenbrügge<br />Universität Hamburg<br />19.06.2011<br />
    3. 3. Introduction<br />Why doweneed an UHI LandscapeMetric?<br />Method<br />Howdoesitwork?<br />Calibrationand Validation<br />Howwelldoesitwork?<br />Conclusion<br />Applyingthemetricto Hamburg<br />Outlook<br />3 Christian Daneke 19.06.2011<br />
    4. 4. Urban Surfaceshave an impact on thelocalclimateandbychangingthisinfluencechangesaswell<br />4 Christian Daneke 19.06.2011<br />Oßenbrügge & Bechtel (2010)<br />
    5. 5. Whatistheproblemandwhy do weneed an UHI-Potential LandscapeMetric?<br />5 Christian Daneke 19.06.2011<br />
    6. 6. Landuse Dataset for Hamburg Metropolitan Region based on ClassificationScheme<br />6 Christian Daneke 19.06.2011<br />Resolution 100 m<br />24Classesin Total,<br />10 Urban Classes<br />Createdfor:<br />1960, 1990, 2005<br />Based on:<br />Aerial Photographs, TopographicMaps, Corine, ATKIS, 3D-Building Data<br />Daneke (2011)<br />
    7. 7. SeveralCriterianeedtobeconsideredforthecalculation<br />7 Christian Daneke 19.06.2011<br /><ul><li>Landuse
    8. 8. Morphology
    9. 9. Neighborhood
    10. 10. Patch Shape
    11. 11. Patch Size
    12. 12. Location</li></li></ul><li>The calculationofthemetric in a nutshell<br />8 Christian Daneke 19.06.2011<br /><ul><li>Based on a Habitat FragmentationMetricproposedby Keppler (1997)
    13. 13. Including all requirementsneededfor UHI potential
    14. 14. Assumefollowinglandusewithtwoclasses
    15. 15. Resistance
    16. 16. Fraction</li></li></ul><li><ul><li>Foreverycellthesurroundingisinvestigatedbased on a searchradiusandscorescalculated
    17. 17. In thiscaseresistance
    18. 18. Green= 1000
    19. 19. Red= 1</li></ul>The calculationofthemetric in a nutshell<br />9 Christian Daneke 19.06.2011<br />𝐴′=𝑤i 𝑎0<br /> <br />
    20. 20. The calculationofthemetric in a nutshell<br />10 Christian Daneke 19.06.2011<br /><ul><li>Based on scores an equivalentradiusiscalculate
    21. 21. Andthecellsweightedaccordingtothedistancetothecentroid</li></ul>𝑟′= 𝐴′/𝜋<br /> <br />𝑣=exp(−𝑟′𝑟0)<br /> <br />
    22. 22. The calculationofthemetric in a nutshell<br />11 Christian Daneke 19.06.2011<br /><ul><li>Based on scores an equivalentradiusiscalculate
    23. 23. Andthecellsweightedaccordingtothedistancetothecentroid</li></ul>𝑟′= 𝐴′/𝜋<br /> <br />𝑣=exp(−𝑟′𝑟0)<br /> <br />
    24. 24. The calculationofthemetric in a nutshell<br />12 Christian Daneke 19.06.2011<br /><ul><li>Accountingfor
    25. 25. Compactness (V)
    26. 26. Fraction (F)
    27. 27. Final valuescalculatedby:</li></ul>𝑠=0∞𝑣𝑓𝑑𝑟<br /> <br />𝐾𝑂𝑉= 𝑠𝑟0𝑧<br /> <br />
    28. 28. UHI Potential for 2005<br />13 Christian Daneke 19.06.2011<br /><ul><li>Final calibration
    29. 29. Parameters:
    30. 30. FractionofInfluence
    31. 31. Resistance
    32. 32. Search radius: 1,5 pixels
    33. 33. Power Z: 0,8</li></li></ul><li>Calibration was donebased on Ellenberg IndicatorsasTemperatureProxies<br />14 Christian Daneke 19.06.2011<br /><ul><li>Calibration / Validation usingEllenberg Indicatorsasproxydatafortemperaturesover a longperiod
    34. 34. On a 1 km Grid
    35. 35. Plantssampledandanalysediftheyprefer „warm“ or „cold“</li></ul>Bechtel (2011)<br />
    36. 36. Scatterplot ofthemodeled UHI Values andtheProx Dataset<br />15 Christian Daneke 19.06.2011<br /><ul><li>Regression analysis
    37. 37. R = 0,662
    38. 38. R2 = 0,438
    39. 39. Onlycellswhichhavemorethan 25 % builtuparea</li></ul>Plant IndicatorTemperature Values<br />Urban Heat Island Potential<br />
    40. 40. StandardizedResiduals on the 1Km Fishnet<br />16 Christian Daneke 19.06.2011<br /><ul><li>Mapping standardizedresiduals on the 1km raster
    41. 41. Relativelygoodfitswithinthecity
    42. 42. Problems
    43. 43. Water
    44. 44. Outskirts</li></li></ul><li>StandardizedResidualsoverlayedwithWaterbodies<br />17 Christian Daneke 19.06.2011<br /><ul><li>Mapping standardizedresiduals on the 1km raster
    45. 45. Relativelygoodfitswithinthecity
    46. 46. Problems
    47. 47. Water
    48. 48. Outskirts</li></li></ul><li>Calculatingthechanging potential from 1960 - 2005<br />18 Christian Daneke 19.06.2011<br /><ul><li>Consideringthe Urban Development from 1960 to 2005
    49. 49. Removingsmaller Parks in 1960 tosimulate „GreeningPolicy“</li></li></ul><li>Conclusionand Outlook<br />Proposed a Methodtoestimate UHI Potential fromLanduse Datasets<br />Enablestoinvestigatelandusescenariosfrommodelsandstudypossibleimplicationsforthe urban climate<br />First calibration on a 1km scalecomparingtotemperatureproxydatashowed a solid fit<br />Further validationofthemethodbased on busmeasurementsat a higherresolution<br />19 Christian Daneke 19.06.2011<br />
    50. 50. ThankYou!<br />Dipl.-Geogr. Christian Daneke<br />christian.daneke@uni-hamburg.de<br />Institut für Geographie<br />Universität Hamburg<br />Bundesstraße 55<br />20146 Hamburg<br />
    51. 51. The Urban Heat Island in Hamburg, aspresentedduringthe last summer<br />21 Christian Daneke 19.06.2011<br />Wetterspiegel (2010)<br />
    52. 52. MorphologicalClassificationSchemeforLanduse-Datasets needed in UHI relatedstudies<br />22 Christian Daneke 19.06.2011<br />Daneke (2011)<br />

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