what glaciers no longer exist in alaska?

To find out which glaciers no longer exist in Alaska, we can refer to scientific research, historical records, and glacier monitoring data. Here's how you can gather this information:

1. Scientific Research: Many scientific studies have been conducted to understand the behavior and changes in glaciers worldwide. Researchers study historical records, satellite imagery, and aerial photographs to identify glaciers that have disappeared. You can search for research papers or reports specifically focused on glaciers in Alaska.

2. Historical Records: Historical records, including maps, photographs, or first-hand accounts, can provide valuable information about past glaciers. Many organizations, such as libraries, museums, or government archives, may hold these historical records. Accessing such resources can help identify glaciers that no longer exist.

3. Glacier Monitoring Data: Organizations like the National Snow and Ice Data Center (NSIDC) or the US Geological Survey (USGS) monitor glaciers in Alaska. They collect data on glacier extent, ice thickness, and melt rates. By analyzing their long-term records, you can identify specific glaciers that have disappeared or significantly retreated over time.

4. Glacier Inventories: The Global Land Ice Measurements from Space (GLIMS) database compiles comprehensive glacier inventories using satellite imagery. It stores information on glacier boundaries, terminus changes, and area variations. Searching their dataset can provide insights into glaciers that no longer exist in Alaska.

By consulting these resources, you can determine which glaciers no longer exist in Alaska and better understand the changes occurring due to climate and environmental factors.