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Table 1.

Summary of microclimate temperatures, number and duration of freeze–thaw cycles at two threshold temperatures on Marion Island

Altitude (m)
200800
Microclimate temperature (°C)   
   Mean 3.3±0.1 0.7±0.1 
   Maximum 18.5 23.0 
   Minimum -2.5 -12.0 
0°C threshold   
   Number of events 18 49 
   Mean duration (h) 5.9±1.1 15.5±1.9 
-5°C threshold   
   Number of events 
   Mean duration (h)  4.5±1.3 
Altitude (m)
200800
Microclimate temperature (°C)   
   Mean 3.3±0.1 0.7±0.1 
   Maximum 18.5 23.0 
   Minimum -2.5 -12.0 
0°C threshold   
   Number of events 18 49 
   Mean duration (h) 5.9±1.1 15.5±1.9 
-5°C threshold   
   Number of events 
   Mean duration (h)  4.5±1.3 

Mean values are ± s.e.m.

Measurements were taken at 1 cm depth in soil at two altitudes on the eastern side of Marion Island in July, August and September 2002.

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