Icebergs turn over due to a process called "gravity-induced iceberg rollover." This occurs when the weight of the underwater portion of the iceberg becomes greater than the weight of the above-water portion. This causes the iceberg to flip so that the heavier side is now underwater.
The frequency of iceberg turnover varies depending on factors such as size, shape, and location. Smaller, more irregularly-shaped icebergs are more likely to turn over than larger, more symmetrical ones. In general, it is estimated that icebergs can turn over anywhere from once every few days to once every few months.
It is difficult to predict when an iceberg will turn over, as it depends on various factors such as the iceberg's shape, size, and surrounding environmental conditions. However, scientists are working to develop models that can help predict iceberg behavior and potential turnover events.
Iceberg turnover can be dangerous for ships and other vessels navigating in the vicinity of the iceberg. When an iceberg turns over, it can create powerful waves and currents that can pose a threat to nearby boats. It is important for ships to exercise caution and maintain a safe distance from icebergs to avoid potential hazards.
There is currently no evidence to suggest that human activity directly contributes to iceberg turnover. However, climate change and rising ocean temperatures could potentially affect the stability of icebergs and increase the likelihood of turnover events. Further research is needed to fully understand the potential impacts of human activity on iceberg behavior.