A satellite-derived glacier inventory for North Asia

Earl, Lucas; Gardner, Alex

doi:10.3189/2016aoj71a008

Cited by 8 publications

(8 citation statements)

References 6 publications

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“…Differences in the estimates of glacial areas obtained by us and other researchers (Table 8) are due to several reasons, as follows. It should be noted that no special survey or article devoted to the results for Tavan Bogd has yet appeared for the data that were obtained within the framework of the RGI 5.0/GLIMS database for the northern slope [74,75] and the "Second Glacier Inventory of China" [76,77] for the western slope.…”

Section: Recent Glacier Extent Of Tavan Bogd and Comparison Between Dmentioning

confidence: 99%

“…Difference between perennial snowfields and small glaciers (diagnostic signs of glaciers, such as crevasses and presence of zones of accumulation and ablation) is not always clearly seen in satellite images, and the same objects can be treated differently by one or the other class of objects. A relatively high area of the glaciers given in the RGI 5.0/GLIMS database [74,75] for the Russian portion of the massif is a good example of overestimation of glacial area due to misinterpretation of perennial snow patches. In our previous article [73] we gave an example of differences between our results of delineation of the glaciers of the northern slope of Tavan Bogd and the results from the RGI 5.0/GLIMS database [74,75].…”

Section: Recent Glacier Extent Of Tavan Bogd and Comparison Between Dmentioning

confidence: 99%

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Present Glaciers of Tavan Bogd Massif in the Altai Mountains, Central Asia, and Their Changes since the Little Ice Age

et al. 2018

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The Tavan Bogd mountains (of which, the main peak, Khuiten Uul, reaches 4374 m a.s.l.) are situated in the central part of the Altai mountain system, in the territories of Russia, Mongolia and China. The massif is the largest glacierized area of Altai. The purposes of this study were to provide a full description of the scale and structure of the modern glacierized area of the Tavan Bogd massif, to reconstruct the glaciers of the Little Ice Age (LIA), to estimate the extent of the glaciers in 1968, and to determine the main glacial trends, and their causes, from the peak of the LIA. This work was based on the results of long-term field studies and analysis of satellite and aerial data. At the peak of the LIA, Tavan Bogd glaciation comprised 243 glaciers with a total area of 353.4 km2. From interpretation of Corona images, by 1968 the number of glaciers had decreased to 236, with a total area of 242 km2. In 2010, there were 225 glaciers with a total area of 201 km2. Thus, since the peak of the LIA, the glacierized area of the Tavan Bogd mountains decreased by 43%, which is somewhat less than for neighboring glacial centers (i.e., Ikh-Turgen, Tsambagarav, Tsengel-Khairkhan and Mongun-Taiga mountains). The probable causes are higher altitude and the predominance of larger glaciers resistant to warming. Accordingly, the smallest decline in Tavan Bogd occurred in the basins of the Tsagan-Gol (31.7%) and Sangadyr (36.4%) rivers where the largest glaciers are located. In contrast, on the lower periphery of the massif, where small glaciers predominate, the relative reduction was large (74–79%). In terms of general retreat trends, large valley glaciers retreated faster in 1968–1977 and after 2010. During the 1990s, the retreat was slow. After 2010, glacial retreat was rapid. The retreat of glaciers in the last 50–60 years was caused by a trend decrease in precipitation until the mid-1970s, and a sharp warming in the 1990s and early 2000s.

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Section: Recent Glacier Extent Of Tavan Bogd and Comparison Between Dmentioning

confidence: 99%

Section: Recent Glacier Extent Of Tavan Bogd and Comparison Between Dmentioning

confidence: 99%

Present Glaciers of Tavan Bogd Massif in the Altai Mountains, Central Asia, and Their Changes since the Little Ice Age

et al. 2018

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“…In the 21st century, the development of remote sensing, sometimes in combination with in situ observations, led to a number of new publications: [31][32][33][34][35][36][37][38][39] The Mongolian glaciers have been cataloged and mapped by Kamp et al [34,40]. Recently the glaciers of the region were included in the GLIMS (Global Land Ice Measurements from Space) database and the Randolph Glacier Inventory [34,41,42]. The materials of the field observations were obtained for Turgen [33], Tavan Bogd, and Tsambagarav [37,43,44].…”

Section: Introductionmentioning

confidence: 99%

Present Glaciers and Their Dynamics in the Arid Parts of the Altai Mountains

et al. 2017

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This research is based on multiyear in-situ observations, analysis of satellite and aerial imagery, meteorological data, and mass balance index calculations. Presently, 659 glaciers cover a total area of 322.1 km 2 . We identified four favorable, two neutral, and five unfavorable longer intervals of glacier development since 1940. A decelerating of glacial retreat took place in the 1960s and in the late 1980s/early 1990s. The strong decline in glacial mass between 1995 and 2009 resulted in a fast reduction of the glacial area (0.9% year −1 on the northern slope of Tavan Bogd, 1.5% year −1 at Mongun-Taiga), mostly due to the degradation of small glaciers; after 2009, the glacial loss slowed down. Large valley glaciers behaved asynchronously until recently, when their retreat accelerated rapidly reaching in some cases over 40 m·year −1 . Degradation of the accumulation zone and separation of the debris-covered parts of the glaciers are characteristic for the glacial retreat in the region of research. The time of reaction of the fronts of four valley glaciers of Mongun-Taiga and the northern slope of Tavan Bogd on climatic fluctuations is estimated between 11 and 20 years. Over the next decade, high rates of glacial degradation are expected.

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“…This accuracy value is in the range of that obtained from other mountain regions [11,13,14]. Fisher et al [15] found that the errors when using medium resolution images increase with decreasing glacier size and for small glaciers (<0.5 km 2 ) can exceed 25%.…”

Section: Discussionmentioning

confidence: 65%

Glacier Changes on the Pik Topografov Massif, East Sayan Range, Southeast Siberia, from Remote Sensing Data

Osipov

Осипова

2018

Geosciences

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Small mountain glaciers represent the most abundant class in many glaciarized areas around the world; however, less is known about their recent area changes under climatic variability of the last decades. The recent fluctuations of glaciers located in the inner parts of continents are the least studied. In this study we present the results of repeated mapping of seven small (<1.5 km 2 ) glaciers located in a continental setting on the northern slope of the Pik Topografov massif, East Sayan Range, southeast Siberia. The multitemporal glacier inventory was derived from the late summer Landsat TM/ETM+ scenes acquired between 1986 and 2010. Glacier outlines were mapped with thresholded ratio (TM3/TM5) method. Topographic inventory parameters were measured from SRTM DEM. Glacier outlines of the Little Ice Age maximum (LIA,~1850) were reconstructed from terminal moraines widely distributed around the glacier snouts. The results indicate a total ice area decrease from 8.1 km 2 in the LIA to 3.8 km 2 in 2010 (53%, 0.33% year −1 ). We revealed accelerated area shrinkage between 1991 and 2001 (almost two times higher than during the period 1986-2010), while between 2001 and 2010, the ice area did not change significantly. Overall, the glacier changes are consistent with the regional climatic trends (winter precipitation and summer temperature). Local topographic settings significantly impacted the glacier dynamics.

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A satellite-derived glacier inventory for North Asia

Cited by 8 publications

References 6 publications

Present Glaciers of Tavan Bogd Massif in the Altai Mountains, Central Asia, and Their Changes since the Little Ice Age

Present Glaciers of Tavan Bogd Massif in the Altai Mountains, Central Asia, and Their Changes since the Little Ice Age

Present Glaciers and Their Dynamics in the Arid Parts of the Altai Mountains

Glacier Changes on the Pik Topografov Massif, East Sayan Range, Southeast Siberia, from Remote Sensing Data

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