Alaska's Shrinking Glaciers

Nearly all of North America's glaciers are inwards retreat. The charge per unit of measurement of retreat has increased chop-chop over the final few decades together with overall each decade sees greater rates of retreat than the preceding one. The National Park Traveler has released an interactive storey map, Glaciers inwards Alaska's National Parks: Monitoring Change, which examines the loss of Alaska's shrinking glaciers.

The map uses satellite imagery to exhibit the modern attain of each of the featured glaciers. Orange overlays are used on the map to exhibit the glacier's historic extent. U.S. Geological Survey topographic maps were used to attain upwards one's hear the glaciers' extent inwards the mid-20th century. The historical extent of the glaciers is so last compared to the extent of the glaciers inwards the 21st Century, every bit calculated from the virtually recent satellite imagery.


Alaska Ice: Documenting Glaciers on the Move is around other Esri Story Map which uses satellite imagery together with comparisons of modern & vintage photographs to document Alaska's shrinking glaciers.

The primary focus of the map is the U.S. Geological Survey's Repeat Photography initiative. USGS has been comparing modern photographs of Alaskan glaciers amongst historical photos, both amongst the same plain of view. The photographs are compared to document together with empathise the changes to glaciers resulting from the changing climate.

The Alaska Ice storey map visits xiv glaciers inwards the U.S. state. Each glacier tin last viewed on a satellite map together with a modern together with historical photograph of each glacier is compared inwards the map sidebar. Of the xiv mapped Alaskan glaciers alone 2 are nonetheless advancing.


Timelapse - aerial imagery of the Mendenhall Glacier inwards 1991 & 2012

Another interesting means to assay the loss of glaciers is amongst Google Timelapse. Timelapse allows you lot to compare aerial imagery over fourth dimension for whatever place on Earth. You tin hence larn into the get upwards of whatever glacier into Timelapse together with discovery the effects of global warming for yourself.

Timelapse provides links to the Shirase Glacier together with the Columbia Glacier only you lot tin role the search box to locate whatever glacier. You tin hence role Timelapse to search for whatever of Alaska's glaciers together with discovery the highlighted loss of each glacier for yourself, using Timelapse's historical aerial imagery.