1

NEW YORK CITY-SPECIFIC CLIMATE

CHANGE PROJECTIONS

February 25, 2009

2

NYC Climate Change Projections

CRI, pg. 17

3

Full Range of GCM Projections and Emission Scenarios

CRI, pg. 18

4

GCM Ranges by Timeslices and Seasons

CRI, pg. 42, 44

5

Extreme Events

CRI, pg. 20

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Extreme Events - Summary

By the end of the century, New York City could experience:

• Approximately 2.5 to 4.5 times more days per year over 90 degrees.

• Approximately 2.5 to 4 times more heat waves (as defined as three consecutive days over 90 degrees) a year

• More frequent, intense rainstorms

• A current 1-in-10 year coastal flood about once every 1 to 3 years

• A current 1-in-100 year coastal flood about once every 15 to 35 years

7

Qualitative Projections

CRI, pg. 21

8

Impacts of Climate Change on Infrastructure

CRI, pg. 58

9

PlaNYC Website

http://nyc.gov/planyc2030