I am fascinated at the rapid growth of Glacier Bay Glacier from 1600 to 1750, along with its rapid retreat from 1750 to 1900. I am interested in the local weather conditions during these times. What are the likely variations in the local temperatures and precipitation during these periods. How much colder was the average local temperature to create no retreat during the summer peak heat during the growth period.
I'm guessing the glacier grew for 8 months of the year, it was growing & moving seaward at a rate of 5-6 meters a day for a 100 years. How different and noticeably different would the climate have felt by citizen of near by Juneau if living during the rapid growth period of 1650. Was it harsh winter conditions almost year round, or ? How much did the average day time high change from what it is today. Can an average year round change in temperature of .5C or 2.5 or 4.5 degrees cause this huge change in glacier behaviour. What was going on with global climate at this time to cause this amazing growth during the maunder minimum? Why the temperature change during this period?