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Observations of Alaskan tidewater calving glaciers prompted Austin Post [2] to describe the tidewater calving glacier advance/retreat cycle: (1) advancing, (2) stable-extended, (3) drastically retreating, or (4) stable-retracted. The following is a detailed review of the tidewater glacier cycle derived by Post, with numerous cited examples, the ...
The retreat of glaciers since 1850 is a well-documented effect of climate change. The retreat of mountain glaciers provide evidence for the rise in global temperatures since the late 19th century. Examples include mountain glaciers in western North America, Asia, the Alps in central Europe, and tropical and subtropical regions of South America ...
An icefield is an example of glacier structure that covers a relatively large area, and is usually located in mountain terrain. [4] Icefields are quite similar to ice caps; however, their morphology is much more influenced by the underlying mountainous topography.
During the proposed episode of snowball Earth, there are rapid and extreme negative excursions in the ratio of 13 C to 12 C. [37] Close analysis of the timing of 13 C 'spikes' in deposits across the globe allows the recognition of four, possibly five, glacial events in the late Neoproterozoic. [38]
Alpine glaciers form on the crests and slopes of mountains. A glacier that fills a valley is called a valley glacier, or alternatively, an alpine glacier or mountain glacier. [14] A large body of glacial ice astride a mountain, mountain range, or volcano is termed an ice cap or ice field. [15]
Ice streams are a type of glacier [1] and many of them have "glacier" in their name, e.g. Pine Island Glacier. Ice shelves are listed separately in the List of Antarctic ice shelves . For the purposes of these lists, the Antarctic is defined as any latitude further south than 60° (the continental limit according to the Antarctic Treaty System ).
A new study reveals how your mood is linked to the time of day, day of week, and season.
5-million-year history, representing the Lisiecki and Raymo (2005) LR04 Benthic Stack Sections of sedimentary cores from off Greenland. Marine isotope stages (MIS), marine oxygen-isotope stages, or oxygen isotope stages (OIS), are alternating warm and cool periods in the Earth's paleoclimate, deduced from oxygen isotope data derived from deep sea core samples.