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heating degree days

The number of degrees of temperature (typically measured in Farenheit) needed to heat a building to a baseline temperature over a period of one year.

Used to calculate:fossil fuels consumed and biomass fuels consumed

Varies by: climate

Used climate Reference Location: Ecosystem
(study period)
Value Units Notes
* Baseline Climate (1970-2010) NYSERDA 2012 Monthly Heating and Cooling Degree Day Data (La Guardia Airport) La Guardia Airport (Queens, NY): Urban landscape (1970 - 2000) 4777 deg F * day Normal value from New York City (La Guardia Airport), Normal is a 30-year degree day average value for the period 1971-2000
* Future Climate in 2020s Assumed New York City: Urban Area () 4055 deg F * day
Future Climate in 2020s Rosenzweig et al 2015 NPCC 2015 New York City: urban area () 5382 deg F * day Based on Rosenzweig et al. (2015), we apply an increase of 2.4 degrees Fahrenheit, based on the mean of the middle 50th percentile projections to determine the equivalent latitude of New York City in the 2020s.
Future Climate in 2020s Rosenzweig et al 2015 NPCC 2015 New York City: urban area () 5325 deg F * day Based on Rosenzweig et al. (2015), we apply a conservative increase of 2 degrees Fahrenheit to determine the equivalent latitude of New York City in the 2020s.
* Future Climate in 2050s Assumed New York City: Mannahatta () 3162 deg F * day
Future Climate in 2050s Rosenzweig et al 2015 NPCC 2015 New York City: urban area () 4283 deg F * day Based on Rosenzweig et al. (2015), we apply an increase of 4.9 degrees Fahrenheit, based on the mean of the middle 50th percentile projections to determine the equivalent latitude of New York City in the 2050s.
Future Climate in 2050s Rosenzweig et al 2015 NPCC 2015 New York City: urban area () 4664 deg F * day Based on Rosenzweig et al. (2015), we apply a conservative increase of 4.1 degrees Fahrenheit to determine the equivalent latitude of New York City in the 2050s.
* Future Climate in 2080s Assumed New York City: Urban Area () 1799 deg F * day
Future Climate in 2080s Rosenzweig et al 2015 NPCC 2015 New York City: urban area () 4756 deg F * day Based on Rosenzweig et al. (2015), we apply a conservative increase of 5.3 degrees Fahrenheit to determine the equivalent latitude of New York City in the 2080s.
Future Climate in 2080s Rosenzweig et al 2015 NPCC 2015 New York City: urban area () 3534 deg F * day Based on Rosenzweig et al. (2015), we apply an increase of 7.05 degrees Fahrenheit, based on the mean of the middle 50th percentile projections to determine the equivalent latitude of New York City in the 2080s.
* Future Climate in 2100s Rosenzweig et al 2015 NPCC 2015 New York City: urban area () 4595 deg F * day Based on Rosenzweig et al. (2015), we apply a conservative increase of 5.8 degrees Fahrenheit to determine the equivalent latitude of New York City in the 2100s.
Future Climate in 2100s Rosenzweig et al 2015 NPCC 2015 New York City: urban area () 3437 deg F * day Based on Rosenzweig et al. (2015), we apply an increase of 8.05 degrees Fahrenheit, based on the mean of the middle 50th percentile projections to determine the equivalent latitude of New York City in the 2100s.
* Past Climate in 1609 NYSERDA 2012- Monthly Cooling and Heating Degree Day Data [for New York State and selected cities] New York City (La Guardia Airport): Urban landscape (1971-2012) 4777 deg F * day

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