Spread the News:ShareSperry Glacier is located 25 miles south of the border between the United States and Canada, in Montana’s Glacier National Park. It is a winter-accumulation glacier, as more snow falls during the winter than is lost during the summer. The moderate-sized glacier can be reached by foot or on horseback, rising to an elevation of around 7,800 feet. The glacier was named for doctor Lyman Beecher Sperry, who in 1894 reasoned that the glacier was the cause of the cloudiness of the water in Avalanche Lake. When Sperry and his party first reached the glacier in 1897, his nephew Albert Sperry had this reaction after viewing the glacier: While standing upon that peak overlooking the terrain above the rim wall, we got the thrill of thrills, for there lay the glacier, shriveled and shrunken from its former size, almost senile, with its back against the mountain walls to the east of it, putting up its last fight for life. It was still what seemed to be a lusty giant, but it was dying, dying, dying, every score of years and as it receded, it was spewing at its mouth the accumulations buried within its bosom for centuries. Today, you can visit Sperry Glacier and walk along the same route that Sperry and his party traveled 120 years ago, although the glacier looks very different today. Join us on this visual tour of the glacier’s past and present. We hope that concerted action on greenhouse gas emissions will assure that this beautiful glacier has a future. Spread the...Read More
Spread the News:ShareWater security is a pervasive issue in Pakistan, a largely arid country. The majority of the country receives less than 300mm of rain per year, while a small region in the north receives upwards of 1000 mm per year. The Indus River provides much of the water to the area, but its flow is irregular due to the variable precipitation. Moreover, the river originates partly in Pakistan and partly in India, creating additional political challenges that stem from the decades-long history of tension between the two countries. Last month, the United Nations Development Programme released a Development Advocate Pakistan report that describes the uncertain future of water in Pakistan, which is impacted by changing climate and melting glaciers, as well as political issues with neighboring India. The report’s editors suggest several ways to increase water stability in Pakistan. They advise increasing public awareness because the lack of trust stems in part from incomplete access to data and information. They also recommend high efficiency irrigation systems and updating academic curriculum in the country to include sustainable development. As the report describes, the region of Gilgit-Baltistan in northern Pakistan provides most of the water in the glaciated parts of the country. Altitudes exceed 5000 meters with annual snowfall of approximately 5000 millimeters in the highest regions. This zone is the largest area of perennial glaciers outside the polar regions; nearly one third of the Gilgit-Baltistan area is glaciated. The meltwater of these glaciers contribute a massive volume of freshwater, which forms a significant component of the flow into the Indus River. The variability of river flows as a result of monsoon seasons has led to water crises and conflicts between provinces, as well...Read More
Spread the News:ShareIn a recent study by Duccio Tampucci et al., rock glaciers in the Italian Alps have been shown to host a wide variety of flora and fauna, supporting plant and arthropod species during temporary decadal periods of climatic warming. Certain species that thrive in cold conditions have been prone to high environmental stress during warm climate stages in the past, but given the results of Tampucci’s research, it is now clear that these species may be able to survive in periglacial settings on the edge of existing glaciers. Active rock glaciers, commonly found on the border of larger glaciers and ice sheets, are comprised of coarse debris with intermixed ice or an ice-core. The study has valuable implications on how organisms may respond to changes in temperature, offering a possible explanation for species’ resiliency. Jonathan Anderson, a retired Glacier National Park ranger, spoke to GlacierHub about the importance of periglacial realms in providing a habitat for animals displaced by modern climate change. “In the years spent in and around the park, it’s clear that more and more animals are feeling the impact of climate change and global warming,” he said. “The areas surrounding the larger glaciers are becoming even more important than before and are now home to many of the species that lived on the receded glacier.” In their study, Tampucci and team analyzed abiotic dimensions of active rock glaciers such as ground surface temperature, humidity and soil chemistry, as well as biotic factors related to the species abundance of plants and arthropods. This data was then compared to surrounding iceless regions characterized by large scree slopes (small loose stones covering mountain slopes) as an experimental...Read More
Spread the News:ShareShrinking glaciers are oft-cited examples of the effects of anthropogenic climate change, providing dramatic imagery in different parts of the world. However, this has mostly been based on global aggregates of glacier extent. Differing opinions also exist about the best way to measure glacial change all over the world. A recent study by Roe et al., published in Nature Geoscience, confirms that climate change has contributed to the shortening of numerous glaciers around the world, but the study is not immune to controversy surroundings the methods used. Using a combination of meteorological data and observations of glacier length, Roe et al. studied the influence of climate on 37 glaciers between 1880 and 2010. The glaciers were selected based on the continuity of length observations and the need for a wide geographical distribution. Glacier mass-balance records are a more direct measure of the effect of climate than glacier length as they measure the difference between the accumulation and ablation (sublimation or melting) of glacier ice. However, most mass-balance records do not extend for more than two decades, contributing to the previous lack of confirmation of the effect of climate change on individual glaciers around the world. The use of observations of glacier length helped to overcome this obstacle, but challenges were still encountered in obtaining long, continuous data sets, particularly for regions such as Asia and South America. In conversation with GlacierHub, Roe shared that many factors can affect the availability of continuous data sets. “For example, the collapse of the Soviet Union led to many glacier observation programs being abandoned,” he stated. An additional challenge arose from the variation in conditions experienced by each glacier. “Every glacier...Read More
We provide information about current scientific research about glaciers and we offer accounts of communities and organizations who are working to address the challenges brought by glacier retreat, whether through activism, policy and economics, through art, photography, or other means.