Figure : cold-hardiness-zones

Observed and Projected Changes in Frost-Free Season

Figure 10.3

Cooperative Institute for Climate and Satellites - NC
Kenneth E. Kunkel

This figure appears in chapter 10 of the Climate Science Special Report: The Fourth National Climate Assessment: Volume I report.

(a) Observed changes in the length of the frost-free season by region, where the frost-free season is defined as the number of days between the last spring occurrence and the first fall occurrence of a minimum temperature at or below 32°F. This change is expressed as the change in the average number of frost-free days in 1986–2015 compared to 1901–1960. (b) Projected changes in the length of the frost-free season at mid-century (2036–2065 as compared to 1976–2005) under the higher scenario (RCP8.5). Gray indicates areas that are not projected to experience a freeze in more than 10 of the 30 years (Figure source: (a) updated from Walsh et al. 2014;a6a312ba-6fd1-4006-9a60-45112db52190 (b) NOAA NCEI and CICS-NC, data source: LOCA dataset).

Free to use with credit to the original figure source.

This figure was created on October 14, 2016.

This figure was submitted on October 13, 2017.

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