thephotosocietyのインスタグラム(thephotosociety) - 3月1日 02時15分

Photo by @shonephoto (Robbie Shone) // Mountain regions respond sensitively to climate change. Taking advantage of Alpine caves, a team of scientists led by Swiss Paleoclimatologist Dr. Marc Luetscher (@paleo_marc) from the Swiss Institute for Speleology and Karst Studies (SISKA), is working to understand how permafrost has evolved through time. Ice caves form through a combination of snow intrusion and/or congelation of water infiltrating a karst system. Often up to several centuries old, the climate record of this ice remains largely under-studied. Today we are also able to tell if a cave was an ice cave in the past. This is achieved by looking for cryogenic cave calcites. These form when water enters a cave, and freezes and turns to ice. In this process, the water becomes progressively enriched in ions to the point that it becomes super-saturated and precipitates calcite.
Pictured here, Dr. Gina Moseley from the University of Innsbruck in Austria who dates the cryogenic cave carbonates adds scale close to a large bed of ice showing the ages and the layers through time, where locked objects hold secrets of past climate.

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