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Green Roofs and the Urban Heat Island Effect

Green Roofs and the Urban Heat Island Effect. Jason Jayanty Dr. Stuart Gaffin Dr. Cynthia Rosenzweig. What Are Green Roofs?. Green Roofs are roofs covered by vegetation Two types of Green Roofs Intensive – Heavy, expensive; capable of supporting large plants

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Green Roofs and the Urban Heat Island Effect

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  1. Green Roofs and the Urban Heat Island Effect Jason Jayanty Dr. Stuart Gaffin Dr. Cynthia Rosenzweig

  2. What Are Green Roofs? • Green Roofs are roofs covered by vegetation • Two types of Green Roofs • Intensive – Heavy, expensive; capable of supporting large plants • Extensive – Light-weight patches of shrubbery • Green Roofs are advantageous for • Keeping buildings cooler in the summer and warmer in the winter • Protecting a city from combined sewage overflow during storms • Extend the life of a roof

  3. Extensive Green Roof

  4. Intensive Green Roof (photo by Don Carlson, Carlson Architects)

  5. The Urban Heat Island Effect • The Urban Heat Island Effect refers to the fact that cities can be up to 5-7º C hotter than the surrounding rural areas • This usually happens because… • Anthropogenic heat (Man-Made) • Concrete can absorb a lot of heat • Tall buildings increase overall surface area for heat absorption • Urban Canyon effect

  6. Why New York City? • New York City has 5 times the area of Central Park in roof space (Gaffin et al, 2004) • If even half of these roofs were made green, It would have significant environmental effects. (Rosenzweig et al, 2005)

  7. 7 6A 6B 5 1 2 4 3

  8. My Objective • My objective is to confirm LANDSAT surface temperature data at key sites of interest around New York City. • Measure differences between green roofs and black roofs • Measure how quickly surfaces heat up in New York

  9. Observations for July 11, 2005

  10. Interesting Results So Far 113th Street and Morningside Morningside Park

  11. 113th And Morningside Data

  12. Uris Hall Data

  13. Further Research • Get surface and air measurements over the course of a day • Expand measurements of surface and air temperatures to other regions of high interest

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