Roundup: Ice Sheets, Cryoconite Holes and Turbulent Heat Fluxes

Late Quaternary Meltwater Pulses and Sea Level Change

From Journal of Quaternary Science: “After the Last Glacial Maximum (LGM) global mean sea level (GMSL) rise was characterized by rapid increases over short (decadal to centennial) timescales superimposed on a longer term secular rise and these have been termed meltwater pulses (MWPs). In this paper we review the timing, impact and nature of these and the effects of rapid drainage of large post‐glacial MWPs into the world’s oceans. We show that drainage of the known post‐glacial lakes in total produced less than around 1.2 m of the 125 m of GMSLR since the LGM.”

Read more about the article here.

Location of the Last Glacial Maximum and Lateglacial lakes (Source: Stephan Harrison, David E. Smith, Neil F. Glasser).


Island Biogeography of Cryoconite Hole Bacteria in Antarctica

From Frontier in Ecology and Evolution: “Cryoconite holes are holes in a glacier’s surface caused by sediment melting into the glacier. These holes are self-contained ecosystems that include abundant bacterial life within their sediment and liquid water, and have recently gained the attention of microbial ecologists looking to use cryoconite holes as “natural microcosms” to study microbial community assembly. This article applies models of island ecosystems to these holes because they are very much like islands in the sea, surrounded by a barrier to entry. ”

Read the details of the paper here.

Cryoconite Holes (Source: Alan Grinberg/Flickr).


Turbulent Heat Fluxes in Qilian Mountains, China

From JGR Atmospheres:” A study of using the bulk method to quantify the turbulent air flow and sublimation/condensation over glacier in August-One Glacier, Qilian Mountains, China. This article addresses the patterns of warming at different wind speeds. We tried to acquire reliable varying and intrinsic aerodynamic roughness length for momentum through its parametric analysis.”
For more details, click here.
Eight-One Glacier (Source: Yen L./Flickr).