Applying GNSS and DTM Technologies to Monitor the Ice Balance of the Horcones Inferior Glacier, Aconcagua Region, Argentina

Lenzano, María Gabriela; Lenzano, Luis; Liaudat, Darío Trombotto; Barón, Jorge; Lannutti, Esteban

doi:10.1007/s12524-013-0294-z

Cited by 3 publications

(5 citation statements)

References 18 publications

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“…After 5 February 2006, the velocities over most of the glacier decreased and no more significant motion was observed. This was confirmed by Global Navigation Satellite Systems measurements during 2009–2010 that yielded velocities lower than 0.03 m/d [ Lenzano et al ., ].…”

Section: Discussionmentioning

confidence: 99%

Geometric evolution of the Horcones Inferior Glacier (Mount Aconcagua, Central Andes) during the 2002–2006 surge

et al. 2016

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The Central Andes of Chile and Argentina (31–35°S) contain a large number and variety of ice masses, but only two surging glaciers have been studied in this region. We analyzed the 2002–2006 surge of the Horcones Inferior Glacier, Mount Aconcagua, Argentina, based on medium spatial resolution (15–30 m) satellite images and digital elevation models. During the buildup phase the glacier was stagnant, with velocities lower than 0.1 m/d. In the active‐phase velocities reached 14 m/d and the glacier front advanced 3.1 km. At the peak of the active phase (2003–2004), the area‐averaged elevation change was −42 m in the reservoir zone (2.53 km2) and +30 m in the receiving zone (3.31 km2). The estimated ice flux through a cross section located at 4175 meter above sea level was 108 m3 during a period of 391 days, a flux that suggests a mean glacier thickness at this location of ~90 m. The depletion phase showed a recovery of the reservoir zone elevation, the down wasting of the receiving zone (−17 m, 2007–2014), and a return to quiescent velocities. The short active phase, the abrupt change in the velocities, and the high level of the proglacial stream indicate a hydrological switch (Alaska type) trigger. The 2002–2006 and 1984–1990 surges of Horcones Inferior were synchronous with the surges of nearby Grande del Nevado Glacier. These events occurred after periods of positive mass balance, so we hypothesize a climate driver.

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Section: Discussionmentioning

confidence: 99%

Geometric evolution of the Horcones Inferior Glacier (Mount Aconcagua, Central Andes) during the 2002–2006 surge

et al. 2016

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“…Pitte et al (2016) calculated glacier elevation changes in the much shorter period between March 2003 and April 2004, at the peak of the active phase, and found a glacier thinning of À43+6 m and a thickening of 30+6 m in the reservoir and receiving areas, respectively. Previously, Lenzano et al (2013) had reported a total elevation change of 23+10 m by analyzing ASTER DEMs between 2001 and 2008. These differences probably arise from the difference in the analyzed time periods and the glacier processes that took place following the surge.…”

Section: Mass Balance and Elevation Changes Of Surge-type Glaciersmentioning

confidence: 99%

“…Cobos and Boninsegna (1983) used aerial photographs to detect the 1.4 km advance of Laguna glacier between 1970 and 1982, and suggested the possibility of a glacier surge. Llorens and Leiva (1995), using Landsat imagery, reported a 2.9 km advance of Innominado glacier in the Plomo catchment -1924- Cox et al, 1935Sievers, 1903historical accounts 1 1984-1990Happoldt and Schrott, 1993Unger et al, 2000 geomorphologic, field investigations, satellite data P 2002P -2007P Milana, 2004Lenzano et al, 2011Lenzano et al, , 2013Pitte et al, 2016 geomorphologic, field investigations, satellite data 1912-1934King, 1934Helbling, 1935;Espizúa, 1986 geomorphologic, field investigations, aerial photographs 1962-1974Casassa et al, 1998aerial photographs 1984Bruce et al, 1987Espizúa, 1987;Espizúa and Bengochea, 1990 1934-1955Espizúa, 1986 satellite data, aerial photographs 1970-1982Cobos and Boninsegna, 1983 aerial photographs P 1 between 1986 and 1991.…”

Section: Introduction and Previous Studiesmentioning

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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“…Therefore, the application of these methods is simple, and the codes are available to be used. Instead, the application of three-dimensional transformation methods usually requires more effort because they involve closed codes built into the differencing process [10,29]. In our case, on the basis of the methodological description presented by Li et al [18] we adapted the method to the case under study for GMB estimation.…”

Section: Application Of Co-registration Methods For An Optimized Gmbmentioning

confidence: 99%

“…There are very few applications of the second type in the field of glaciology (e.g., [13]). In the Central Andes, Lenzano [10] and Lenzano et al [29] achieved co-registration by means of three-dimensional transformations. It is worth mentioning that, in Southern Patagonia, there are no applications of this method.…”

Section: Introductionmentioning

confidence: 99%

Co-Registration Methods and Error Analysis for Four Decades (1979–2018) of Glacier Elevation Changes in the Southern Patagonian Icefield

et al. 2022

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The main goal of this paper is to compare two co-registration methods for geodetic mass balance (GMB) calculation in 28 glaciers making up the Upper Santa Cruz River basin, Southern Patagonian Icefield (SPI), from 1979 to 2018. For this purpose, geospatial data have been used as primary sources: Hexagon KH-9, ASTER, and LANDSAT optical images; SRTM digital radar elevation model; and ICESat elevation profiles. After the analyses, the two co-registration methods, namely M1, based on horizontal displacements and 3D shift vectors, and M2, based on three-dimensional transformations, turned out to be similar. The errors in the GMB were analyzed through a k index that considers, among other variables, the error in elevation change by testing four interpolation methods for filling gaps. We found that, in 63% of the cases, the relative error in elevation change contributes 90% or more to k index. The GMB throughout our study area reported that a loss value of −1.44 ± 0.15 m w. e. a−1 (−3.0 Gt a−1) and an ice thinning median of −1.38 ± 0.11 m a−1 occurred within the study period. The glaciers that showed the most negative GMB values were Upsala, with an annual elevation change median of −2.07 ± 0.18 m w. e. a−1, and Ameghino, with −2.31 ± 0.22 m w. e. a−1.

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Applying GNSS and DTM Technologies to Monitor the Ice Balance of the Horcones Inferior Glacier, Aconcagua Region, Argentina

Cited by 3 publications

References 18 publications

Geometric evolution of the Horcones Inferior Glacier (Mount Aconcagua, Central Andes) during the 2002–2006 surge

Geometric evolution of the Horcones Inferior Glacier (Mount Aconcagua, Central Andes) during the 2002–2006 surge

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

Co-Registration Methods and Error Analysis for Four Decades (1979–2018) of Glacier Elevation Changes in the Southern Patagonian Icefield

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