Fifty years of studying the Medvezhiy Glacier (West Pamirs) by the Institute of Geography, RAS

Осипова, Г. Б.

doi:10.15356/2076-6734-2015-1-129-140

Cited by 5 publications

(9 citation statements)

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“…A number of surge-type glaciers in the Karakorum have shown repeated, frequent surges in relatively short time periods (Paul, 2015; Quincey and Luckman, 2014). In the Pamir, Medvezhiy Glacier surged 5 times between 1963 and 2011 (Osipova, 2015). On the contrary, some of the sampled glaciers did not surge since the early 20th century (e.g.…”

Section: Discussionmentioning

confidence: 99%

New evidence of glacier surges in the Central Andes of Argentina and Chile

Falaschi

Bolch

Lenzano

et al. 2018

Progress in Physical Geography: Earth and Environment

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In contrast to the large surge-type glacier clusters widely known for several mountain ranges around the world, the presence of surging glaciers in the Andes has been historically seen as marginal. The improved availability of satellite imagery during the last years facilitates investigating of glaciers in more detail even in remote areas. The purpose of the study was therefore to revisit existing information about surge-type glaciers for the Central Andes of Argentina and Chile (32° 40′–34° 20′ S), to identify and characterize possible further surge-type glaciers, providing new insights into the mass balance and evolution of the velocity of selected glaciers during the surge phase. Based on the analysis of 1962–2015 satellite imagery, historical aerial images, differencing of digital elevation models and a literature survey, we identified 21 surge-type glaciers in the study area. Eleven surge events and six possible surge-type glaciers were identified and described for the first time. The estimation of annual elevation changes of these glaciers for the 2000–2011 period, which encompasses the latest surge events in the region, showed heterogeneous behavior with strongly negative to positive surface elevation change patterns (−1.1 to +1.0 m yr−1). Additionally, we calculated maximum surface velocities of 3±1.9 m d−1 and 3.1±1.1 m d−1 for two of the glaciers during the latest identifiable surge events of 1985–1987 and 2003–2007. Within this glacier cluster, highly variable advance rates (0.01–1 km yr−1) and dissimilar surface velocities at the surge peak (3–35 m d−1) were observed. In comparison with other clusters worldwide, surge-type glaciers in the Central Andes are on average smaller and show minor absolute advances. Generally low velocities and the heterogeneous duration of the surge cycles are common between them and glaciers in the Karakorum, a region with similar climatic characteristics and many known surge-type glaciers. As a definitive assertion concerning the underlying surge mechanism of surges in the Central Andes could not be drawn based on the remote sensing data, this opens more detailed research avenues for surge-type glaciers in the region.

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Section: Discussionmentioning

confidence: 99%

New evidence of glacier surges in the Central Andes of Argentina and Chile

Falaschi

Bolch

Lenzano

et al. 2018

Progress in Physical Geography: Earth and Environment

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show abstract

“…In contrast, the surging glaciers in the Pamir mountain ranges to the north of the Karakoram received less attention, but some studies have recently been published (e.g. Lv et al, 2019;Osipova, 2015;Wendt et al, 2017;Holzer et al, F. Goerlich et al: More dynamic than expected: an updated survey of surging glaciers in the Pamir 2016). This might be due to the fact that several surges during the Soviet era have already been described in detail (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…This might be due to the fact that several surges during the Soviet era have already been described in detail (e.g. the surges of Medvezhiy and Geographical Society glaciers are well documented; see Osipova, 1971, 1975;Kotlyakov et al, 2003;Osipova, 2015), and a detailed inventory describing a high number (> 800) of surge-type glaciers based on satellite data and aerial images was published (Osipova et al, 1998). However, this and many of the publications are in Russian and are therefore little known internationally.…”

Section: Introductionmentioning

confidence: 99%

More dynamic than expected: an updated survey of surging glaciers in the Pamir

Goerlich

Bolch

Paul

2020

Earth Syst. Sci. Data

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Abstract. The investigation of surging glaciers using remote sensing has recently seen a strong increase as freely available satellite data and digital elevation models (DEMs) can provide detailed information about surges that often take place in remote and inaccessible regions. Apart from analysing individual surges, satellite information is increasingly used to collect valuable data on surging glaciers. Related inventories have recently been published for several regions in High Mountain Asia including the Karakoram or parts of the Pamir and western Kunlun Shan, but information for the entire Pamir is solely available from a historic database listing about 80 glaciers with confirmed surges. Here we present an updated inventory of confirmed glacier surges for the Pamir that considers results from earlier studies and is largely based on a systematic analysis of Landsat image time series (1988 to 2018), very high-resolution imagery (Corona, Hexagon, Bing Maps, Google Earth) and DEM differences. Actively surging glaciers (e.g. with advancing termini) were identified from animations and flicker images and the typical elevation change patterns (lowering in an upper reservoir zone and thickening further down in a receiving zone). In total, we identified 206 spatially distinct surges within 186 glacier bodies mostly clustered in the northern and western part of the Pamir. Where possible, minimum and maximum glacier extents were digitised, but often interacting tributaries made a clear separation challenging. Most surging glaciers (n=70) are found in the larger size classes (>10 km2), but two of them are very small (<0.5 km2). We also found several surges where the length of the glacier increased by more than 100 %. The created datasets are available at: https://doi.org/10.1594/PANGAEA.914150 (Goerlich et al., 2020).

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“…In contrast, the surging glaciers in the Pamir mountain ranges to the north of the Karakoram received less attention, but recently some studies were published (e.g. Lv et al 2019;Osipova 2015;Wendt et al 2017;Holzer et al 2016). This might be due to the fact that several surges during the Soviet era have already been described in detail (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…This might be due to the fact that several surges during the Soviet era have already been described in detail (e.g. the surges of Medvezhy and Geographical Society glaciers are well documented, see Osipova (1971, 1975), Kotlyakov et al (2003) and Osipova (2015) and a detailed inventory describing a high number (>800) of surge-type glaciers based on satellite data and aerial images was published (Osipova et al 1998). However, this and many of the publications are in Russian and are therefore little known internationally.…”

Section: Introductionmentioning

confidence: 99%

More dynamic than expected: An updated survey of surging glaciers in the Pamir

Goerlich¹,

Bolch²,

Paul³

2020

Preprint

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Abstract. The investigation of surging glaciers using remote sensing has recently seen a strong increase as freely available satellite data and digital elevation models (DEMs) can provide detailed information about surges that often take place in remote or inaccessible regions. Apart from analysing individual surges, satellite information is increasingly used to collect capable data on surging glaciers. Related inventories have recently been published for several regions in High Mountain Asia including the Karakoram, parts of the Pamir and western Kunlun Shan, but information for the entire Pamir is solely available from a historic database listing about 80 glaciers with confirmed surges. Here we present an updated inventory of confirmed glacier surges for the Pamir that considers results from earlier studies and is based on a systematic analysis of Landsat image time series (1988 to 2018) and DEM differences. Actively surging glaciers were identified from animations, flicker images and the typical elevation change patterns. Selected historic and contemporary very high-resolution imagery were used to confirm surges. In total, we identified 206 spatially distinct surges within 186 glacier bodies, mostly clustered in the northern and central part of the Pamir. Where possible, minimum and maximum glacier extents were digitized, but often interacting tributaries made a clear separation challenging. Most surging glaciers (n = 70) are found in the larger size classes (> 10 km2), but two of them are very small (

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Fifty years of studying the Medvezhiy Glacier (West Pamirs) by the Institute of Geography, RAS

Cited by 5 publications

References 1 publication

New evidence of glacier surges in the Central Andes of Argentina and Chile

New evidence of glacier surges in the Central Andes of Argentina and Chile

More dynamic than expected: an updated survey of surging glaciers in the Pamir

More dynamic than expected: An updated survey of surging glaciers in the Pamir

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