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Table 2.

Summary of projected changes in various temperature indices.a DOI: https://doi.org/10.1525/elementa.2021.00059.t2

IndexProjected Change (GOM)
Cooling degree days +50 °C to +300 °C 
Heating degree days –400 °C to –1300 °C 
Number of growing season days (warm-season crops) +18 to +29 
Highest daily maximum temperature +1.9 °C to +4.4 °C 
Lowest daily minimum temperature +3.8 °C to +5.5 °C 
Annual number of “hot” daysb +2 to +20 
IndexProjected Change (GOM)
Cooling degree days +50 °C to +300 °C 
Heating degree days –400 °C to –1300 °C 
Number of growing season days (warm-season crops) +18 to +29 
Highest daily maximum temperature +1.9 °C to +4.4 °C 
Lowest daily minimum temperature +3.8 °C to +5.5 °C 
Annual number of “hot” daysb +2 to +20 

aFrom recent American climate assessments (relative to 1976–2005) and Canadian climate assessments (relative to 1986–2005) for the GOM region (Kunkel et al., 2013; Vose et al., 2017; Dupigny-Giroux et al., 2018; Zhang et al., 2019).

b“Hot” days are defined by the CCCR as greater than 30 °C.

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