Area and mass changes of Siachen Glacier (East Karakoram)

Agarwal, Vibhor; Bolch, Tobias; Syed, Tajdarul H.; Pieczonka, Tino; Strozzi, Tazio; Nagaich, Rishabh

doi:10.1017/jog.2016.127

Cited by 58 publications

(32 citation statements)

References 66 publications

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“…Pieczonka et al, 2013). The ICIMOD glacier inventory (Bajracharya and Shrestha, 2011), also available through the GLIMS database (www. glims.org), was used as a baseline data set and was manually adjusted based on the utilized optical imageries for DTM generation and Landsat ETM+ scenes of the years 2000 and 2001.…”

Section: Datamentioning

confidence: 99%

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Brief communication: Glaciers in the Hunza catchment (Karakoram) have been nearly in balance since the 1970s

et al. 2017

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Section: Datamentioning

confidence: 99%

“…a −1 . Agarwal et al (2016) reported a mass budget of −0.03 ± 0.21 m w.e. a −1 of Siachen Glacier for the period 1999-2007.…”

Section: Introductionmentioning

confidence: 99%

Brief communication: Glaciers in the Hunza catchment (Karakoram) have been nearly in balance since the 1970s

et al. 2017

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“…4) with an area of 1107 km 2 . In addition, Agarwal and others (2016) showed a mass balance of −0.03 ± 0.21 m w.e. a −1 during 1999-2007 for the Siachen glacier (937 km 2 ).…”

Section: The Long-term Glacier Change Anomaly In the Karakorammentioning

confidence: 99%

“…However, several studies based on ICESat/GLAS trends have reported a slightly negative or nearly stable glacier mass balance in the entire Karakoram for 2003-09 ( others, 2012, 2015; Gardner and others, 2013). More recently, by subtracting SRTM DEM from TanDEM-X DEM and Cartosat-1 DEM, respectively, Rankl and Braun (2016) and Agarwal and others (2016) obtained similar results in the Shaksgam valley (central Karakoram, for 2000-12) and the Siachen glacier (eastern Karakoram, for 2000-07). At present, the mass-balance records of the Karakoram glaciers are mainly concentrated in the early 21st century, and the observation times cover ∼10 years, which leaves scope for extending the timescale of the mass-balance monitoring.…”

Section: Introductionmentioning

confidence: 99%

Slight glacier mass loss in the Karakoram region during the 1970s to 2000 revealed by KH-9 images and SRTM DEM

Zhou

2017

J. Glaciol.

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ABSTRACT. An anomalously slight glacier mass gain during 2000 to the 2010s has recently been reported in the Karakoram region. However, to date, no investigations of the region-wide glacier mass balance in the Karakoram prior to 2000 have been reported, leaving a knowledge gap for assessing glacier responses to climate change. We calculated elevation and mass change using DEMs generated from KH-9 images acquired during 1973-1980 and the 1 arc-second SRTM DEM. We find a slight mass loss of −0.09 ± 0.03 m w.e. a −1 (12 366 km 2 ) for 1973-2000, which is less negative than the global average rate for 1971-2009 (−0.31 ± 0.19 m w.e. a −1 ). Within the Karakoram, the glacier change patterns are spatially and temporally heterogeneous. In particular, a nearly stable state in the central Karakoram (−0.04 ± 0.05 m w.e. a −1 during the period implies that the Karakoram anomaly dates back to the 1970s. Combined with the previous studies, we conclude that the Karakoram glaciers as a whole were in a nearly balanced state during the 1970s to the 2010s.

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“…ice at similar elevations across HMA (Gardelle et al, 2013;Kääb et al, 2012), in the Khumbu region (Nuimura et al, 2012), the Langtang catchment , the Kangri Karpo Mountains (Wu et al, 2018), for the Kanchenjunga Glacier (Lamsal et al, 2017) and the Siachen Glacier (Agarwal et al, 2017). This has been referred to as the "debris-cover anomaly" .…”

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confidence: 99%

Can ice-cliffs explain the debris-cover anomaly? New insights from Changri Nup Glacier, Nepal, Central Himalaya

Brun

Wagnon

Shea

et al. 2018

Preprint

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Abstract. Ice cliff backwasting on debris-covered glaciers is recognized as an important process, potentially responsible for the so-called "debris-cover anomaly", i.e. the fact that debris-covered and debris-free glacier tongues appear to have similar thinning rates in Himalaya. In this study, we assess the total contribution of ice cliff backwasting to the net ablation of the tongue of the Changri Nup Glacier over two years. Detailed terrestrial photogrammetry surveys were conducted on select ice cliffs in November 2015 and 2016, and the entire glacier tongue was surveyed with unmanned air vehicles (UAVs) and 5Pléiades tri-stereo imagery in November 2015, November 2016, and November 2017. The total difference between the volume loss from ice cliffs measured with the terrestrial photogrammetry, considered as the reference data, and the UAV and Pléiades was less than 3 % and 7 %, respectively, demonstrating the ability of these datasets to measure volume loss from ice cliffs. For the period November 2015-November 2016 (resp. November 2016-November 2017), using UAV and Pléiades over the entire glacier tongue, we found that ice cliffs, which cover 7 % (resp. 8 %) of the planar area, contribute to 23 ± 5 % (resp. 24 ± 10 5 %) of the total net ablation of Changri Nup Glacier tongue. Ice cliffs have a net ablation rate 3.1 ± 0.6 (resp. 3.0 ± 0.6) times higher than the average glacier tongue surface. However, on Changri Nup Glacier, ice cliffs cannot compensate for the reduction of ablation due to debris-cover. Reduced ablation and lower emergence velocities on debris-covered glacier tongues could be responsible for the debris-cover anomaly.

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Area and mass changes of Siachen Glacier (East Karakoram)

Cited by 58 publications

References 66 publications

Brief communication: Glaciers in the Hunza catchment (Karakoram) have been nearly in balance since the 1970s

Brief communication: Glaciers in the Hunza catchment (Karakoram) have been nearly in balance since the 1970s

Slight glacier mass loss in the Karakoram region during the 1970s to 2000 revealed by KH-9 images and SRTM DEM

Can ice-cliffs explain the debris-cover anomaly? New insights from Changri Nup Glacier, Nepal, Central Himalaya

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