Final answer:
The calculation of the mean temperature change between two cold seasons requires local temperature data for those seasons, which is not provided. Therefore, we cannot determine the change in mean temperature without this information.
Step-by-step explanation:
To determine how the mean temperature changed between the two cold seasons, we need to calculate the average temperatures for each season and then find the difference between them. However, the actual temperature data for the two seasons is missing in the provided information.
Without the local temperature data for November through February for the two consecutive cold seasons, we are unable to compute the mean temperature change. It's important to note that climate and temperature changes on a local scale can be influenced by a variety of factors beyond global climate change, such as local weather patterns, urban heat islands, and variations in regional climate cycles.