Sentences with phrase «frozen lakebed»

For Mars, this meant a thin carbon dioxide atmosphere with what little water remained trapped in frozen lakebed glaciers buried under oxidized iron soil, or in seasonal floes of brine mixed with trace amounts of water.

Not exact matches

In response, lakebed temperatures of Arctic lakes less than 1 meter (3 feet) deep have warmed by 2.4 degrees Celsius (4.3 degrees Fahrenheit) during the past three decades, and during five of the last seven years, the mean annual lakebed temperature has been above freezing.

Cristina Surdu of the University of Waterloo in Canada and colleagues report in The Cryosphere that there has been a 22 % fall in grounded ice — frozen from surface to lakebed — between 1991 and 2011.