Development of a Green Roof Environmental Monitoring and Meteorological Network in New York City

Gaffin, Stuart R.; Khanbilvardi, R.; Rosenzweig, Cynthia

doi:10.3390/s90402647

Cited by 56 publications

(46 citation statements)

References 7 publications

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“…Ref. [51]). The essential difference between an extensive and intensive roof is the type of vegetation and therefore the height of the vegetation layer.…”

Section: Vegetated Roofsmentioning

confidence: 99%

“…The essential difference between an extensive and intensive roof is the type of vegetation and therefore the height of the vegetation layer. It can be assumed that extensive roofs generally have vegetation lower than 0.15 m and intensive roofs have vegetation higher than 0.15 m [51]. Intensive roofs have a larger effect on the heat flux through the roof since the amount of vegetation is higher.…”

Section: Vegetated Roofsmentioning

confidence: 99%

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Reprint of: On the predicted effectiveness of climate adaptation measures for residential buildings

Hooff

Blocken

Hensen

et al. 2015

Building and Environment

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a b s t r a c tIn a changing outdoor climate, new buildings as well as the existing building stock need to adapt in order to keep providing their inhabitants and users a comfortable and healthy indoor environment, with a minimum or -preferably -no increase in energy consumption. In this paper, the effectiveness of six passive climate change adaptation measures applied at the level of building components is assessed using building energy simulations for three generic residential buildings as commonly built in -among others -the Netherlands: (1) detached house; (2) terraced house; (3) apartment. The study involves both residential buildings that are built according to the regulations and common practice in 2012, and residential buildings that were constructed in the 1970s, with a lower thermal resistance of the opaque and transparent parts of the building envelope. The climate change adaptation measures investigated are: (i) increased thermal resistance; (ii) changed thermal capacity; (iii) increased short-wave reflectivity (albedo); (iv) vegetation roofs; (v) solar shading; and (vi) additional natural ventilation. This paper quantifies the effectiveness of these climate change adaptation measures for new residential buildings as well as for renovation of the current building stock. The performance indicator is the number of overheating hours during a year. It is shown that exterior solar shading and additional natural ventilation are most effective for this performance indicator. Furthermore, increasing thermal insulation to reduce energy use for heating demands additional measures to prevent overheating.

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“…Ref. [51]). The essential difference between an extensive and intensive roof is the type of vegetation and therefore the height of the vegetation layer.…”

Section: Vegetated Roofsmentioning

confidence: 99%

Section: Vegetated Roofsmentioning

confidence: 99%

Reprint of: On the predicted effectiveness of climate adaptation measures for residential buildings

Hooff

Blocken

Hensen

et al. 2015

Building and Environment

View full text Add to dashboard Cite

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“…Additional studies using sensors have looked at how green spaces can have a positive influence on ambient environment, comfort, and improved air quality. Reported studies include Hangzhou (Shuo et al, 2010), New York City (Gaffin et al, 2009), and Tel Aviv (Cohen et al, 2010). While a wide variety of weather apps for smartphones already exist, user-centric weathermonitoring capabilities for smartphones have also started to emerge.…”

Section: Monitoring Ambient Weathermentioning

confidence: 99%

Environmental Monitoring for Health and Wellness

McGrath¹,

Scanaill²

2013

Sensor Technologies

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“…8 For new and re-roofing commercial projects, the market share of asphalt-based roofs has dropped from its historical dominance to about 35% [19]. Furthermore, a study by Urban & Roth [20] showed that a white single-ply membrane now costs the same as a black single-ply membrane.…”

Section: Sproul Et Al (Version Dated 11/01/2013)mentioning

confidence: 99%

“…Figure 4 of Gaffin et al [8] indicates that average July SR of an extensive green roof is 0.20. We assume that an aged white roof has an SR of 0.55, which can be rounded to three times the green roof SR owing to the uncertainty in both SR estimates.…”

mentioning

confidence: 99%

Economic comparison of white, green, and black flat roofs in the United States

Sproul

Wan

Mandel

et al. 2014

Energy and Buildings

161

104

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White and "green" (vegetated) roofs have begun replacing conventional black (dark-colored) roofs to mitigate the adverse environmental effects of dark and impervious urban surfaces. This paper presents an economic perspective on roof color choice, in particular the direct comparison of white and green roofs, by conducting a 50-year life-cycle cost analysis (LCCA). Using data collected from 22 flat roof projects in the U.S., we find that relative to black roofs, white roofs provide a 50-year net savings (NS) of $25/m 2 ($2.40/ft 2 ) and green roofs have a negative NS of $71/m 2 ($6.60/ft 2 ). An important implication is that green roofs never quite "pay." Despite lasting at least twice as long as white or black roofs and therefore requiring fewer replacements, green roofs cannot compensate for their sizable installation cost premium of $151/m 2 ($14/ft 2 ).However, while the 50-year NS of white roofs compared to green roofs is $96/m 2 ($8.90/ft 2 ), the annualized cost premium is just $3.20/m 2 -year ($0.30/ft 2 -year). This annual sum should not deter owners from reaping the environmental and aesthetic benefits of green roofs (such as enhanced biodiversity, greater carbon sequestration, and increased property value) that are not captured in this LCCA. Choosing between a white and green roof should therefore be based on the preferences of the building owner. If global warming is a priority, then an owner should choose white roofs, which are three times more effective than green roofs in cooling the globe. If local environmental benefits are favored, then an owner should choose green roofs, which offer builtin stormwater management and a "natural" urban landscape aesthetic. Although black roofs are more cost-effective than green roofs and even white roofs in rare cases, we strongly recommend building code policies that phases out dark-colored roofs in warm climates to protect against their adverse public health externalities.

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Development of a Green Roof Environmental Monitoring and Meteorological Network in New York City

Cited by 56 publications

References 7 publications

Reprint of: On the predicted effectiveness of climate adaptation measures for residential buildings

Reprint of: On the predicted effectiveness of climate adaptation measures for residential buildings

Environmental Monitoring for Health and Wellness

Economic comparison of white, green, and black flat roofs in the United States

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