GlacierHub News Report 06:21:18

GlacierHub News Report 06:21:18

The GlacierHub News Report is a bi-monthly video news report that features some of our website’s top stories. This week, GlacierHub News is featuring an assessment of the environmental impact of tourism in Tibet, deforestation on Mt. Kenya, cryoacoustics, and the adventures of a Filipino world traveler.

This week’s news report features:

 

Assessing the Environmental Impacts of Tourism in Tibet

By: Yang Zhang

Summary: In a paper published earlier this year in the Journal of Mountains, six researchers from the Tibetan Plateau provide science-based suggestions for policymakers to decide where and how ecotourism should be conducted. The construction of the Qinghai-Tibet Railway in 2006 gave people across the globe access to this cut-off region. By 2017, Tibet was the host of 25.61 million travelers worldwide, a 12-times growth compared to a decade ago. The exponential increase in tourism raises significant concerns about environmental degradation in this fragile ecological hotspot.

Read more about the research here.

Is Deforestation Driving Mt. Kenya’s Glacier Recession?

By: Jade Payne

Summary: Mount Kenya’s glaciers are rapidly receding. A new study published in the American Journal of Environmental Science and Engineering found that forest cover has the highest correlation with Mt. Kenya’s glacier coverage. The study found that the current trend in glacier thinning will continue until the glaciers completely disappear by 2100. In addition, the research found forest cover to be responsible for 75 percent of changes in glacier coverage during the study period, from 1984 to 2017.

Read more about Mt. Kenya’s glacier recession here.

Pioneer Study Sounds Out Iceberg Melting in Norway

By: Sabrina Ho

Summary: Last month, a team of researchers published their work on the intensity, directionality and temporal statistics of underwater noise produced when icebergs melt. The study is a pioneer in the field of cryoacoustics research still in its early stages since existing studies largely focus on larger forms of ice such as glaciers and ice shelves instead of icebergs.

Read more about the study here.

From the Philippines to Glacier Grey

By: Brian Poe Llamanzares

Summary: Rocco Puno, a Filipino world traveler, shared his story about traveling to Glacier Grey, a massive 1,200-year-old glacier that stretches 350 km long in the Chilean side of Patagonia.

Read the full story here.

Video Credits:

Presenters: Brian Poe Llamanzares & Jade Payne

Video Editor: Brian Poe Llamanzares

Writer: Brian Poe Llamanzares

News Intro: YouTube

Music: iMovie

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Roundup: Karakoram, Dust and Prokaryotes

Roundup:  Karakoram, Ice Core, and Chile

 

Karakoram Glaciers in Balance

From the Journal of Glaciology: “An anomalously slight glacier mass gain during 2000 to the 2010s has recently been reported in the Karakoram region. We calculated elevation and mass change using Digital Elevation Models (DEMs) generated from KH-9 (a series of satellites) images acquired during 1973–1980… Within the Karakoram, the glacier change patterns are spatially and temporally heterogeneous. In particular, a nearly stable state in the central Karakoram (−0.04 ± 0.05 m w.e. a−1 during the period 1974–2000) implies that the Karakoram anomaly dates back to the 1970s. Combined with the previous studies, we conclude that the Karakoram glaciers as a whole were in a nearly balanced state during the 1970s to the 2010s.”

Read more about this study here.

Karakoram's glaciers were in a nearly balanced state between 1970-2010 (Source: mtzendo / Creative Commons)
Karakoram’s glaciers were in a nearly balanced state between 1970-2010 (Source: mtzendo/Creative Commons).

 

Dust in Ice Core Reflects the Last Deglaciation

From Quaternary Science Reviews: “The chemical and physical characterization of the dust record preserved in ice cores is useful for identifying of dust source regions, dust transport, dominant wind direction and storm trajectories. Here, we present a 50,000-year geochemical characterization of mineral dust entrapped in a horizontal ice core from the Taylor Glacier in East Antarctica. Strontium (Sr) and neodymium (Nd) isotopes, grain size distribution, trace and rare earth element (REE) concentrations, and inorganic ion (Cl and Na+) concentrations were measured in 38 samples, corresponding to a time interval from 46 kyr before present (BP) to present… This study provides the first high time resolution data showing variations in dust provenance to East Antarctic ice during a major climate regime shift, and we provide evidence of changes in the atmospheric transport pathways of dust following the last deglaciation.”

Read more about the findings here.

An ice core from Taylor Glacier reveals changes in dust composition during the last deglaciation (Source: Oregon State University / Creative Commons).
An ice core from Taylor Glacier reveals changes in dust composition during the last deglaciation (Source: Oregon State University/Creative Commons).

 

Prokaryotic Communities in Patagonian Lakes

From Current Microbiology: “The prokaryotic (microscopic single-celled organisms without a distinct nucleus with a membrane or other specialized organelles) abundance and diversity in three cold, oligotrophic Patagonian lakes (Témpanos, Las Torres and Mercedes) in the northern region Aysén (Chile) were compared in winter and summer…Prokaryotic abundances, numerically dominated by Bacteria, were quite similar in the three lakes, but higher in sediments than in waters, and they were also higher in summer than in winter… The prokaryotic community composition at Témpanos lake, located most northerly and closer to a glacier, greatly differed in respect to the other two lakes. In this lake was detected the highest bacterial diversity… Our results indicate that the proximity to the glacier and the seasonality shape the composition of the prokaryotic communities in these remote lakes. These results may be used as baseline information to follow the microbial community responses to potential global changes and to anthropogenic impacts.”

Read more about the results here.

Prokaryotic diversity is greatest in Témpanos lake, near a glacier (Source: Cuorogrenata / Creative Commons)
Prokaryotic diversity is greatest in Témpanos lake, near a glacier (Source: Cuorogrenata/Creative Commons).
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