Posts by Ashley Chappo

Photo Friday: The Melting Andean Glaciers

Posted by on Feb 3, 2017 in All Posts, Featured Posts, Images | 1 comment

Photo Friday: The Melting Andean Glaciers

Spread the News:ShareIn South America, the tropical glaciers of the Andes have been shrinking at an alarming rate, leaving the local communities at risk of losing an important water source. In Bolivia, for example, an Andean glacier known as the Chacaltaya Glacier disappeared completely in 2009, cutting off a valuable water resource to the nearby city of La Paz during the dry season. In total, the Andes Mountains are home to nearly 99 percent of the world’s tropical glaciers, with 71 percent located in Peru’s Cordillera Blanca and 20 percent in Bolivia, according to UNEP. Other tropical glaciers are found in the equatorial mountain ranges of Venezuela, Colombia and Ecuador. Over the past 30 years, scientists estimate that the glaciers of the tropical Andes have shrunk by 30 to 50 percent. This rate of decline predicts that within 10 to 15 years many of the smaller tropical glaciers will have completely disappeared. Take a look at GlacierHub’s collection of images of the rapidly retreating Andean glaciers.                                   Spread the...

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Photo Friday: Crowd-Sourced Images of Glacier Retreat

Posted by on Jan 20, 2017 in All Posts, Featured Posts, Images | 0 comments

Photo Friday: Crowd-Sourced Images of Glacier Retreat

Spread the News:ShareImagine if we had a crowd-sourced digital record of the damage climate change is causing to our planet. That’s the mission of Project Pressure, an UK-based organization dedicated to documenting and publicizing the world’s vanishing glaciers. With MELT, an open source digital atlas, Project Pressure hopes to give the public a new tool to visually tour the world’s receding glaciers, helping us all to better understand the ongoing impact of rising global temperatures. Rather than relying on satellite images and direct measurement, two techniques that have their limits, Project Pressure hopes to document glacier fluctuations of the world’s 300,000 glaciers through comparative imagery. This will allow researchers to analyze glaciers otherwise inaccessible for direct measurement and provide new visual insights to changes in glacier length.  The images are both heartbreaking and alarming, demonstrating both the staggering beauty of our world glaciers and their current state of decline. Take a look at GlacierHub’s collection of images from Project Pressure, and learn more about the initiative here.                                           Spread the...

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Avalanche on Ama Dablam Claims Life of Sherpa Guide

Posted by on Jan 12, 2017 in All Posts, Featured Posts, News, Sports | 0 comments

Avalanche on Ama Dablam Claims Life of Sherpa Guide

Spread the News:ShareA Sherpa guide has died and a foreign climber was injured following an avalanche on Mount Ama Dablam in east Nepal in late November. The avalanche was triggered by a 5.4 magnitude earthquake that occurred east of Kathmandu and nearly 11 miles west of Namche Bazar in Nepal at approximately 5:20 a.m. local time. Lapka Thundu Sherpa, a resident of Pangboche, Solukhumbu district, and British surgeon Ciaran Hill were climbing Ama Dablam as a pair when the earthquake struck. They were reportedly only a meter apart, heading for the summit above Camp 3, over 20,669 ft., when pieces of ice dislodged during the shaking, according to Tim Mosedale, leader of the 13-member expedition. Ama Dablam is one of the world’s most formidable and breathtaking peaks, sitting just east of Mount Everest at an elevation of 22,624 ft. Nicknamed the “Matterhorn of the Himalayas,” Ama Dablam is a prominent landmark of the Khumbu Valley for those trekking to Everest’s base camp. The mountain is well known for its hanging glacier, named the Dablam, due to its resemblance to the sacred dablam or pendant worn by Sherpa women. Despite its aesthetic beauty, tragedy is all-too-familiar at Ama Dablam. In 2006, six climbers were killed when an avalanche impacted Camp 3 on the Southwest Ridge. In that accident, three foreigners and three Sherpa guides were killed when a serac (a pinnacle or ridge of ice on the surface of a glacier) from the Dablam glacier descended on the climbers’ tents in the early morning hours of November 13. Since then, the Dablam has become increasingly unstable, with further notable collapse in 2008. Climbers of Ama Dablam typically summit via the Southwest Ridge, settling in at Camp 3 before the final ascent, although this route has recently been under review due to the changing nature of the glacier, which sits above and to the right of Camp 3. It is not clear whether the recent tragedy was from glacial ice breaking off, but according to Jeffrey Kargel, a geoscientist at the University of Arizona who had hiked near the mountain this past October, a treacherous-looking piece of ice was visible nearby the glacier. “There’s some ice ready to fall,” Kargel recalls saying to his hiking companion, a trekking CEO. It was a chunk of ice right near Camp 3. Although the ice Kargel noticed might not have been the same chunk of ice involved in the deadly November ice fall, Kargel emphasized that ice falls on the Himalayan peaks are a common natural occurrence. “My feeling is that these chunks of ice and snow are coming down all of the time. They have to come down,” said Kargel to GlacierHub. “You can see how precarious they are, perched on the side and summit of the mountain.” This sentiment, and the feeling that the tragedy in November was natural and unavoidable, was echoed by the surviving climbers involved in the avalanche on Ama Dablam. “I think it’s important for me to say that from my perspective it was clearly just one of those freak occurrences that could not have been predicted or avoided,” said Mr. Hill in a statement. He was ultimately saved by a long line helicopter rescue operation. “There’s no one to blame.” Hill credited his own survival to the “flawless” response of the helicopter and ground crew. He suffered broken bones in the right hand, ribs and base of his back but is expected to recover from his injuries. Thundu Sherpa, on the other hand, suffered a fatal head injury from the falling ice, according to Mosedale, the expedition’s...

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Roundup: Sediments, Swamps and Sea Levels

Posted by on Jan 9, 2017 in All Posts, Featured Posts, Roundup | 0 comments

Roundup: Sediments, Swamps and Sea Levels

Spread the News:ShareRoundup: High Arctic, Peru, and Global Seas   Suspended Sediment in a High-Arctic River From Science of The Total Environment: “Quantifying fluxes [the action of flowing] of water, sediment and dissolved compounds through Arctic rivers is important for linking the glacial, terrestrial and marine ecosystems and to quantify the impact of a warming climate… This study uses a 8-years data set (2005–2012) of daily measurements from the high-Artic Zackenberg River in Northeast Greenland to estimate annual suspended sediment fluxes based on four commonly used methods: M1) is the discharge weighted mean and uses direct measurements, while M2-M4) are one uncorrected and two bias-corrected rating curves extrapolating a continuous concentration trace from measured values.”   Read more about suspended sediment fluxes here:     Glacier Recession in Cordillera Blanca From Applied Geography: “Receding mountain glaciers affect the hydrology of downslope ecosystems with consequences for drinking water, agriculture, and hydropower production. Here we combined land cover derived from satellite imagery and other environmental data from the northern Peruvian Andes into a first differencing regression model to assess wetland hydrologic connectivity… The results indicate that there were two primary spatial driving forces of wetland change in Peru’s Cordillera Blanca from 1987 to 1995: 1) loss in glacier area was associated with increased wetland area, controlling for other factors; while 2) an increase in mean annual stream discharge in the previous 12 months increased wetland area.”   Learn more about the study here:     Observation-Based Estimates of Glacier Mass Change From Surveys in Geophysics: “Glaciers have strongly contributed to sea-level rise during the past century and will continue to be an important part of the sea-level budget during the twenty-first century. Here, we review the progress in estimating global glacier mass change from in situ measurements of mass and length changes, remote sensing methods, and mass balance modeling driven by climate observations. For the period before the onset of satellite observations, different strategies to overcome the uncertainty associated with monitoring only a small sample of the world’s glaciers have been developed. These methods now yield estimates generally reconcilable with each other within their respective uncertainty margins. Whereas this is also the case for the recent decades, the greatly increased number of estimates obtained from remote sensing reveals that gravimetry-based methods typically arrive at lower mass loss estimates than the other methods. We suggest that strategies for better interconnecting the different methods are needed to ensure progress and to increase the temporal and spatial detail of reliable glacier mass change estimates.”   Read more about global sea-level rise here:   Spread the...

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Roundup: Peruvian Climate, Tibetan Lakes, and Greenland’s Glaciers

Posted by on Jan 2, 2017 in All Posts, Featured Posts, Roundup | 0 comments

Roundup: Peruvian Climate, Tibetan Lakes, and Greenland’s Glaciers

Spread the News:ShareRoundup: Peru, Tibet and Greenland   Project to Improve Climate Services in Peru From Climate Services: “CLIMANDES is a pilot twinning project between the National Weather Services of Peru and Switzerland (SENAMHI and MeteoSwiss), developed within the Global Framework for Climate Services of the World Meteorological Organization (WMO). Split in two modules, CLIMANDES aims at improving education in meteorology and climatology in support of the WMO Regional Training Center in Peru, and introducing user-tailored climate services in two pilot regions in the Peruvian Andes… The efforts accomplished within CLIMANDES improved the quality of the climate services provided by SENAMHI.” Read more about CLIMANDES here.   Monitoring Lake Levels on the Tibetan Plateau From Journal of Hydrology: “Lakes on the Tibetan Plateau (TP) are of great interest due to their value as water resources but also as an important indicator of climate change. However, in situ data in this region are extremely scarce and only a few lakes have gauge measurements… In this study, Cryosat-2 SARIn mode data over the period 2010–2015 are used to investigate recent lake level variations… Lakes in the northern part of the TP experienced pronounced rising (avg. 0.37 ± 0.10 m/yr), while lakes in southern part were steady or decreasing even in glaciated basins with high precipitation… These results demonstrate that lakes on the TP are still rapidly changing under climate change, especially in northern part of the TP, but the driving factors are variable and more research is needed.” Learn more about climate change on the Tibetan Plateau here.   Data Portal to Study Greenland’s Ice Sheet From Eos: “A new web-based data portal gives scientists access to more than 40 years of satellite imagery, providing seasonal to long-term insights into outflows from Greenland’s ice sheet… This portal harnesses more than 37,000 images from Landsat archives, dating back to the early 1970s, to track changes in outlet glaciers over time… Through analyzing data from this portal, we can see in great detail how several outlet glaciers are speeding up their treks to the sea. What’s more, any user can access the data to conduct their own studies of glacier behavior at Greenland’s coasts through time.” Read more about Greenland’s retreating glaciers here: Spread the...

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