---
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caption: 'These maps show projected average changes in cooling degree days for two future time periods: 2021-2050 and 2070-2099 (as compared to the period 1971-2000). The higher emissions scenario (A2) assumes climate change associated with continued increases in emissions of heat-trapping gases, while the lower emissions scenario (B1) assumes significant reductions. The projections show significant regional variations, with the greatest increases in the southern United States by the end of this century under the higher emissions scenario. Furthermore, population projections suggest continued shifts toward areas that require air conditioning in the summer, thereby increasing the impact of temperature changes on increased energy demand.<tbib>b2e7f7f3-4801-4a70-821b-b37abd843843</tbib> (Figure source: NOAA NCDC / CICS-NC).'
chapter:
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  display_name: 'Chapter 4: Energy Supply and Use'
  doi: 10.7930/J0BG2KWD
  identifier: energy-supply-and-use
  number: 4
  report_identifier: nca3
  sort_key: 40
  title: Energy Supply and Use
  url: http://nca2014.globalchange.gov/report/sectors/energy
chapter_identifier: energy-supply-and-use
cited_by: []
contributors:
  - display_name: 'Scientist : Kenneth Kunkel (Cooperative Institute for Climate and Satellites - NC) '
    href: http://52.38.26.42:8080/contributor/2522.yaml
    id: 2522
    organization:
      country_code: US
      display_name: 'Cooperative Institute for Climate and Satellites - NC'
      identifier: cooperative-institute-climate-satellites-nc
      name: 'Cooperative Institute for Climate and Satellites - NC'
      organization_type_identifier: academic
      type: organization
      url: http://www.cicsnc.org/
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    person:
      display_name: Kenneth Kunkel
      first_name: Kenneth
      id: 1025
      last_name: Kunkel
      middle_name: E.
      orcid: 0000-0001-6667-7047
      type: person
      url: http://cicsnc.org/people/kenneth-kunkel/
    person_id: 1025
    person_uri: /person/1025
    role_type_identifier: scientist
    uri: /contributor/2522
create_dt: 2013-11-19T16:55:16
description: 'These maps show projected average changes in cooling degree days for two future time periods: 2021-2050 and 2070-2099 (as compared to the period 1971-2000). The higher emissions scenario (A2) assumes climate change associated with continued increases in emissions of heat-trapping gases, while the lower emissions scenario (B1) assumes significant reductions. The projections show significant regional variations, with the greatest increases in the southern United States by the end of this century under the higher emissions scenario. Furthermore, population projections suggest continued shifts toward areas that require air conditioning in the summer, thereby increasing the impact of temperature changes on increased energy demand.<tbib>b2e7f7f3-4801-4a70-821b-b37abd843843</tbib> (Figure source: NOAA NCDC / CICS-NC).'
display_name: '4.3: Increasing Numbers of Cooling Degree Days'
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identifier: cooling-degree-days
images:
  - attributes: 'cooling degree days, temperature, projections, emissions scenarios'
    create_dt: 2013-11-15T13:43:00
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    identifier: f6db3545-873b-4c9e-b857-c3bb5671aea4
    lat_max: 49.31
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    lon_max: -67.06
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    submission_dt: ~
    time_end: 2050-12-31T23:59:59
    time_start: 1971-01-01T00:00:00
    title: 'Increasing Numbers of Cooling Degree Days: Higher Emissions (A2), 2021-2050'
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  - attributes: 'cooling degree days, temperature, projections, emissions scenarios'
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    time_end: 2099-12-31T23:59:59
    time_start: 1971-01-01T00:00:00
    title: 'Increasing Numbers of Cooling Degree Days: Higher Emissions (A2), 2070-2099'
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  - attributes: 'cooling degree days, temperature, projections, emissions scenarios'
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    time_end: 2050-12-31T23:59:59
    time_start: 1971-01-01T00:00:00
    title: 'Increasing Numbers of Cooling Degree Days: Lower Emissions (B1), 2021-2050'
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  - attributes: 'cooling degree days, temperature, projections, emissions scenarios'
    create_dt: 2013-11-15T13:43:00
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    time_end: 2099-12-31T23:59:59
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    title: 'Increasing Numbers of Cooling Degree Days: Lower Emissions (B1), 2070-2099'
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ordinal: 3
parents: []
references:
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    uri: /reference/b2e7f7f3-4801-4a70-821b-b37abd843843
report:
  display_name: 'Climate Change Impacts in the United States: The Third National Climate Assessment'
report_identifier: nca3
source_citation: NOAA NCDC / CICS-NC
submission_dt: ~
time_end: ~
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title: Increasing Numbers of Cooling Degree Days
type: figure
uri: /report/nca3/chapter/energy-supply-and-use/figure/cooling-degree-days
url: http://nca2014.globalchange.gov/report/sectors/energy/graphics/increasing-numbers-cooling-degree-days
usage_limits: Free to use with credit to the original figure source.