---
attributes: 'Contiguous U.S., freeze-free season, frost-free season, observed'
cited_by: []
contributors:
  - display_name: 'Scientist : Kenneth Kunkel (Cooperative Institute for Climate and Satellites - NC) '
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    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'
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      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/
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create_dt: 2013-11-22T09:40:00
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figures:
  - attributes: ~
    caption: 'The frost-free season length, defined as the period between the last occurrence of 32°F in the spring and the first occurrence of 32°F in the fall, has increased in each U.S. region during 1991-2012 relative to 1901-1960. Increases in frost-free season length correspond to similar increases in growing season length. (Figure source: NOAA NCDC / CICS-NC).'
    chapter_identifier: our-changing-climate
    create_dt: 2013-11-18T14:42:00
    identifier: observed-increase-in-frostfree-season-length
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    ordinal: 10
    report_identifier: nca3
    source_citation: NOAA NCDC / CICS-NC
    submission_dt: ~
    time_end: ~
    time_start: ~
    title: Observed Increase in Frost-Free Season Length
    url: http://nca2014.globalchange.gov/highlights/report-findings/our-changing-climate/graphics/observed-increases-frost-free-season
    usage_limits: Free to use with credit to the original figure source.
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parents: []
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submission_dt: ~
time_end: 2012-12-31T23:59:00
time_start: 1901-01-01T00:00:00
title: Observed Increase in Frost-Free Season Length
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