Roundup: Antarctic Soils, Himalayan Glacial Vulnerability, and Lake Pastahué 

Impacts on Prokaryotes in Antarctic Soils

From Antarctic Science: “The soil microbiome was investigated at environmentally distinct locations on King George Island in the South Shetland Islands (Antarctic Peninsula) … the taxonomic analysis revealed 20 bacterial and archaeal phyla, among which Proteobacteria (29.6%), Actinobacteria (25.3%), Bacteroidetes (15.8%), Cyanobacteria (11.2%), Acidobacteria (4.9%) and Verrucomicrobia (4.5%) comprised most of the microbiome.”

Read more about how deglaciation and human impacts affect prokaryotic communities in Antarctic soils here.

King George Island, Antarctica (Source: Acaro/Creative Commons).


Borehole Thermometry and Vulnerability of Himalayan Glaciers

From Nature Scientific Reports: “From boreholes drilled in the glacier’s ablation area, we measured a minimum ice temperature of −3.3 °C, and even the coldest ice we measured was 2 °C warmer than the mean annual air temperature. Our results indicate that high-elevation Himalayan glaciers are vulnerable to even minor atmospheric warming.”

Read more about Himalayan glacial vulnerability due to complex surface topography and seasonal variations here.

Bhagirathi Peaks, Garhwal Himalaya (Source: Richard Haley/Flickr).


Record of Environmental Change in Lake Pastahué

From SAGE Journals: “The aim of this study was to reconstruct the environmental and climatic history of the last 1000 years of Lake Pastahué through a multi-proxy sediment core analysis … the variations observed since the beginning of the 20th century could be the result of the combined effect of anthropogenic activities and the increase in temperature recorded in south-central Chile and Patagonia.”

Read more about documenting paleo records on Lake Pastahué here.

Lake Pastahué, Chile (Source: Pablo Acevedo).