Posts by Holly Davison

Roundup: GLOFs, Iron, and Soil Stability

Posted by on Apr 24, 2017 in All Posts, Featured Posts, Roundup | 0 comments

Roundup: GLOFs, Iron, and Soil Stability

Spread the News:ShareRoundup: GLOFs, Iron, and Soil   Observations of a GLOF near Mt. Everest From The Cryosphere: “Glacier outburst floods with origins from Lhotse Glacier, located in the Everest region of Nepal, occurred on 25 May 2015 and 12 June 2016. The most recent event was witnessed by investigators, which provided unique insights into the magnitude, source, and triggering mechanism of the flood. The field assessment and satellite imagery analysis following the event revealed that most of the flood water was stored englacially and that the flood was likely triggered by dam failure.” Read more about the GLOF events in Nepal here.   Transfer of Iron to the Antarctic From Nature: “Iron supplied by glacial weathering results in pronounced hotspots of biological production in an otherwise iron-limited Southern Ocean Ecosystem. However, glacial iron inputs are thought to be dominated by icebergs. Here we show that surface runoff from three island groups of the maritime Antarctic exports more filterable than icebergs. Glacier-fed streams also export more acid-soluble iron associated with suspended sediment than icebergs. Significant fluxes of filterable and sediment-derived iron are therefore likely to be delivered by runoff from the Antarctic continent. Although estuarine removal processes will greatly reduce their availability to coastal ecosystems, our results clearly indicate that riverine iron fluxes need to be accounted for as the volume of Antarctic melt increases in response to 21st century climate change.” Learn more about iron transfer here.   The Role of Vegetation in Alpine Soil Stability From International Soil and Water Conservation Research: “One fifth of the world’s population is living in mountains or in their surrounding areas. This anthropogenic pressure continues to grow with the increasing number of settlements, especially in areas connected to touristic activities, such as the Italian Alps. The process of soil formation on high mountains is particularly slow and these soils are particularly vulnerable to soil degradation. In alpine regions, extreme meteorological events are increasingly frequent due to climate change, speeding up the process of soil degradation and increasing the number of severe erosion processes, shallow landslides and debris flows. Vegetation cover plays a crucial role in the stabilization of mountain soils thereby reducing the risk of natural hazards effecting downslope areas.” Read more about soil stability here. Spread the...

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First-time Visits to an Alaskan Glacier Just Got More Expensive

Posted by on Apr 20, 2017 in All Posts, Featured Posts, News, Tourism | 0 comments

First-time Visits to an Alaskan Glacier Just Got More Expensive

Spread the News:ShareThe thought of being able to drive right up to a glacier seems strange to most people. However, that is how visitors have accessed Matanuska Glacier in Alaska thanks to a privately-owned road that leads to a parking area near the glacier’s debris-covered section. For years, visitors with various experiences and interests have been able to enjoy first-hand the majesty of Alaska’s largest glacier, measuring 26 miles in length. Yet, the company that owns the road and runs one of twelve independent enterprises that offer tours of Matanuska recently required that all first-time visitors pay a $100 fee for a guided tour if they want any first-time access to the glacier. This new requirement has some locals and tourists up in arms. While the company Matanuska Glacier Park LLC cites safety issues as the main reason for this new requirement, some visitors remain unhappy that the $100 guided tour is now the only option offered to first-timers. After their first visit, guided tours are no longer necessary, and visitors have the option of buying a ticket for $20. In an interview with GlacierHub, Bill Stevenson, the owner of Matanuska Glacier Park LLC, which operates Matanuska Glacier Adventures, explained that the three-hour guided tour has been $100 for quite some time, despite more recent controversy. He acknowledged that the new requirement that first-time visitors must pay for the guided tour is one that upsets visitors. However, there are many admission options, he says, including $20 tickets. He maintains that the guided tour with an experienced guide provides a lot of information about a “fascinating part of nature” for first-time visitors. He describes the glacier as “very user-friendly” and the sloping toe of the glacier as very gradual, making it easy to walk around. However, not all visitors and locals are convinced the steep fee for first-timers is the right course of action. “One of the most special things about living in Alaska is having incredible access to nature,” Alaskan resident Rachel Kaplan explained to GlacierHub. “Putting a high fee on that access limits who can visit.” While she does understand the potential safety concerns, she went on to say that “having a high fee to access the glacier really bothers me.” Stevenson made it clear to GlacierHub that the tour company is not the sole source of income for his company. As the leaseholder for the road, he plays many roles. His company has chosen to share the glacier with 11 other independent tour companies in the area, he noted, providing more than enough business to go around with 20,000 annual visitors to the glacier. The fees for guided tours at other tour companies in the area also vary for visitors, including those for first-time visitors. While fees at Matanuska Glacier Adventures is on the expensive side, some of the other tour companies are charging higher fees for access. Climate change further complicates matters. Stevenson told GlacierHub, “No question, we’ve had a decline in the mass of ice.” He estimates that Matanuska loses about 30 feet per year in length. Perhaps, as glacier recession continues, a $100 price tag for admission to one of the world’s disappearing resources will seem less significant. The drive-up location itself may be worth the fee. Spread the...

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OMG: An Artist Flew over the Greenland Icesheet

Posted by on Apr 6, 2017 in All Posts, Art/Culture, Featured Posts, News | 0 comments

OMG: An Artist Flew over the Greenland Icesheet

Spread the News:ShareIn a recent article in Nature Climate Change, Sonja van Renssen describes various mediums through which visual artists and musicians represent climate change. She argues that illustrating climate change through art can ground it in our culture and open up new dialogues. She offers several examples, including Justin Brice Guariglia, who recently became the first artist in history to be involved in a NASA mission. He is in the midst of a five-year commitment to join NASA flights over Greenland from 2015 to 2020 in order to visually document changing climate. Guariglia’s work is inspired by scientific data, but it is not featured directly in his art. His prints focus on the connection between humans and nature during the Anthropocene, the current geologic age of the Earth. As Renssen explains in her paper, the Anthropocene is the time period when “human activity is the dominant influence on climate and the environment.” Guariglia’s enormous pieces dwarf the viewer. Jakobshavn I, a recent project, is an acrylic print on polystyrene that represents a glacier in Greenland. He prints his large-scale photographs on durable materials. Guariglia’s hope is that while the glaciers themselves may not last, his art will endure, according to Renssen. Guariglia is a member of the Oceans Melting Greenland (OMG) project, which researches the effects of ocean warming on Greenland’s glaciers. The project takes high resolution elevation measurements of these glaciers each year during the spring to measure annual glacier retreat. In addition, a second mission takes place each summer, during which 250 temperature and salinity probes measure the temperature and salinity of water in the Atlantic Ocean. These combined datasets will improve modeling of sea and ice interactions, helping to improve estimates of the contribution of Greenland’s ice to global sea level rise. In an interview with GlacierHub, Josh Willis, the principal investigator for the OMG NASA mission, explained that he is “excited by the collaboration with Justin because it means we might be able to connect with people who have a hard time relating climate change to their own daily lives. That’s important to me because climate change is a big deal, and I think we’ve been slow to accept it.” Other scientific organizations like the National Science Foundation agree with NASA’s investment in blending climate change and art. The Antarctic Artists and Writers Program sponsors individuals in the humanities, including painters and photographers, to be inspired by and help document the heritage in Antarctica. The trend in using art to portray the detrimental effects of climate change could be a creative alternative to communicating environmental risks. For example, alumni and faculty from the University of Miami recently used film, photography, and land art to illustrate climate change issues. Like Guariglia and Willis, this intersection of science and art could be uniquely effective in communicating these risks. Spread the...

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Photo Friday: Glacier Tattoos

Posted by on Mar 31, 2017 in All Posts, Art/Culture, Featured Posts, Images | 0 comments

Photo Friday: Glacier Tattoos

Spread the News:ShareThe beauty and grandeur of glaciers inspire some people to get tattoos of these natural wonders on their skin. Despite the vastness of glaciers, their presence on Earth may be less permanent than those tattoos, due to increased melting caused by global warming. The ways in which people choose to immortalize glaciers also vary. Some designs capture the simple beauty, while others focus on memories or experiences on glaciers. See images of these fascinating tattoos below:                 Spread the...

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World Bank Study Proposes Solutions to Bolivia’s Water Crisis

Posted by on Mar 23, 2017 in All Posts, Featured Posts, News | 0 comments

World Bank Study Proposes Solutions to Bolivia’s Water Crisis

Spread the News:ShareBolivia is currently in the midst of the worst drought in twenty-five years following decades of intense water crises, including an infamous “water war” in 2000 in the city of Cochabamba in which tens of thousands of Bolivians protested the privatization of water. To cope with the current situation, Bolivia’s president Evo Morales has declared a national state of emergency, imposed stricter water rationing, and even fired a top water official, but can more be done to alleviate the crisis? In a recent report for the World Bank Group, Sarah Botton et al. cover the current crisis and explain how a blend of “big system” water infrastructure, in which a single operator manages the piped system, and “small system” infrastructure, in which individuals informally control water resources, can help conditions in La Paz, Bolivia’s capital, and El Alto, a large adjacent city known for its high elevation and largely indigenous population.  Botton et al. present a case study of water management in La Paz and El Alto to consider the benefit of future water management strategies in the region. The central and oldest neighborhoods of these Bolivian cities have traditionally had better access to water, with poorer communities suffering from noteworthy shortages or decreased access, according to Botton et al. As a result, both cities have gone through cycles of public and private management before changing back to a public management system in 2007.  Dirk Hoffmann, a professor at Karlsruhe University of Applied Sciences in Germany and an expert in glacier change and glacier lake outburst flood risk in the Bolivian Andes, explained in an interview with GlacierHub that the immense population growth in La Paz and El Alto further complicates water management issues in the area. He indicated that the urban area of the metropolis of La Paz and El Alto is growing 40,000 to 50,000 people each year.  “The water supply system in La Paz and El Alto has not kept up with the population growth,” Hoffmann told GlacierHub. To make matters worse, Hoffmann explained that there is a 40 to 50 percent loss of water as it travels from the source due to old water pipes, open canals, infiltrations, and (illegal) access by users. In 1997, while under public management, 95 percent of the La Paz population was connected to the drinking water system and 80 percent to sewers, according to Botton et al. In El Alto, where the population is poorer and more heavily indigenous, only 65 percent of the population was connected to drinking water and 25 percent to sewers. In order to provide more dependable water to the indigenous people, the decision was made by the government of El Alto in July 1997 to move the governance of the water system to a private company. La Paz similarly made the decision to privatize. A contract was signed by both cities with Aguas del Illimani, a subsidiary of the French company Suez. However, problems with privatization arose because the company lacked the resources to equip the poorest households with water. Aguas del Illimani was ultimately replaced in 2007 by Empresa Pública Social de Agua y Saneamiento (EPSAS), a public utility. EPSAS dealt with a major setback in 2008 in which a landslide caused by heavy rain destroyed the pipes in the Pampahasi system, which supplied water to the southern and eastern part of La Paz. The area went without water for three weeks because repairs were delayed and EPSAS could not afford the US$450,000 s to repair the damage. They required a loan from the municipality and the national government. President Morales and water experts maintain that climate change...

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