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  • 1
    Online Resource
    Online Resource
    Ice wastage on the Kerguelen Islands (49°S, 69°E) between 1963 and 2006
    American Geophysical Union (AGU) ; 2009
    In:  Journal of Geophysical Research Vol. 114, No. F3 ( 2009-07-23)
    Details
    In: Journal of Geophysical Research, American Geophysical Union (AGU), Vol. 114, No. F3 ( 2009-07-23)
    Type of Medium: Online Resource
    ISSN: 0148-0227
    URL: Article
    DOI: 10.1029/2008JF001192
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2009
    detail.hit.zdb_id: 2033040-6
    detail.hit.zdb_id: 3094104-0
    detail.hit.zdb_id: 2130824-X
    detail.hit.zdb_id: 2016813-5
    detail.hit.zdb_id: 2016810-X
    detail.hit.zdb_id: 2403298-0
    detail.hit.zdb_id: 2016800-7
    detail.hit.zdb_id: 161666-3
    detail.hit.zdb_id: 161667-5
    detail.hit.zdb_id: 2969341-X
    detail.hit.zdb_id: 161665-1
    detail.hit.zdb_id: 3094268-8
    detail.hit.zdb_id: 710256-2
    detail.hit.zdb_id: 2016804-4
    detail.hit.zdb_id: 3094181-7
    detail.hit.zdb_id: 3094219-6
    detail.hit.zdb_id: 3094167-2
    detail.hit.zdb_id: 2220777-6
    detail.hit.zdb_id: 3094197-0
    SSG: 16,13
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  • 2
    Online Resource
    Online Resource
    Hot Spots of Glacier Mass Balance Variability in Central Asia
    American Geophysical Union (AGU) ; 2021
    In:  Geophysical Research Letters Vol. 48, No. 11 ( 2021-06-16)
    Details
    In: Geophysical Research Letters, American Geophysical Union (AGU), Vol. 48, No. 11 ( 2021-06-16)
    Abstract: Annual glacier mass balance for Central Asia (1999/00–2017/18) is derived by combining transient snowlines, geodetic surveys, and modeling Strong spatiotemporal heterogeneity with contrasting patterns of mass gain and loss are found Hot spots of heterogeneous mass balance variability are associated with highly variable glacier melt water runoff
    Type of Medium: Online Resource
    ISSN: 0094-8276 , 1944-8007
    URL: Article
    DOI: 10.1029/2020GL092084
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2021
    detail.hit.zdb_id: 2021599-X
    detail.hit.zdb_id: 7403-2
    SSG: 16,13
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  • 3
    Online Resource
    Online Resource
    Four years of mass balance on Chhota Shigri Glacier, Himachal Pradesh, India, a new benchmark glacier in the western Himalaya
    International Glaciological Society ; 2007
    In:  Journal of Glaciology Vol. 53, No. 183 ( 2007), p. 603-611
    Details
    In: Journal of Glaciology, International Glaciological Society, Vol. 53, No. 183 ( 2007), p. 603-611
    Abstract: Little is known about the Himalayan glaciers, although they are of particular interest in terms of future water supply, regional climate change and sea-level rise. In 2002, a long-term monitoring programme was started on Chhota Shigri Glacier (32.2° N, 77.5° E; 15.7 km 2 , 6263–4050 ma.s.l., 9 km long) located in Lahaul and Spiti Valley, Himachal Pradesh, India. This glacier lies in the monsoon–arid transition zone (western Himalaya) which is alternately influenced by Asian monsoon in summer and the mid-latitude westerlies in winter. Here we present the results of a 4 year study of mass balance and surface velocity. Overall specific mass balances are mostly negative during the study period and vary from a minimum value of –1.4 m w.e. in 2002/03 and 2005/06 (equilibrium-line altitude (ELA) ∼5180 m a.s.l.) to a maximum value of +0.1 m w.e. in 2004/05 (ELA 4855 m a.s.l.). Chhota Shigri Glacier seems similar to mid-latitude glaciers, with an ablation season limited to the summer months and a mean vertical gradient of mass balance in the ablation zone (debris-free part) of 0.7mw.e.(100 m) –1 , similar to those reported in the Alps. Mass balance is strongly dependent on debris cover, exposure and the shading effect of surrounding steep slopes.
    Type of Medium: Online Resource
    ISSN: 0022-1430 , 1727-5652
    URL: Article
    DOI: 10.3189/002214307784409306
    Language: English
    Publisher: International Glaciological Society
    Publication Date: 2007
    detail.hit.zdb_id: 2140541-4
    SSG: 14
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  • 4
    Online Resource
    Online Resource
    Contrasted surface mass balances of debris-free glaciers observed between the southern and the inner parts of the Everest region (2007–15)
    Cambridge University Press (CUP) ; 2017
    In:  Journal of Glaciology Vol. 63, No. 240 ( 2017-08), p. 637-651
    Details
    In: Journal of Glaciology, Cambridge University Press (CUP), Vol. 63, No. 240 ( 2017-08), p. 637-651
    Abstract: Three debris-free glaciers with strongly differing annual glaciological glacier-wide mass balances (MBs) are monitored in the Everest region (central Himalaya, Nepal). The mass budget of Mera Glacier (5.1 km 2 in 2012), located in the southern part of this region, was balanced during 2007–15, whereas Pokalde (0.1 km 2 in 2011) and West Changri Nup glaciers (0.9 km 2 in 2013), ~30 km further north, have been losing mass rapidly with annual glacier-wide MBs of −0.69 ± 0.28 m w.e. a −1 (2009–15) and −1.24 ± 0.27 m w.e. a −1 (2010–15), respectively. An analysis of high-elevation meteorological variables reveals that these glaciers are sensitive to precipitation, and to occasional severe cyclonic storms originating from the Bay of Bengal. We observe a negative horizontal gradient of annual precipitation in south-to-north direction across the range (≤−21 mm km −1 , i.e. −2% km −1 ). This contrasted mass-balance pattern over rather short distances is related (i) to the low maximum elevation of Pokalde and West Changri Nup glaciers, resulting in years where their accumulation area ratio is reduced to zero and (ii) to a steeper vertical gradient of MB for glaciers located in the inner arid part of the range.
    Type of Medium: Online Resource
    ISSN: 0022-1430 , 1727-5652
    URL: Article
    DOI: 10.1017/jog.2017.30
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 2017
    detail.hit.zdb_id: 2140541-4
    SSG: 14
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  • 5
    Online Resource
    Online Resource
    Review of the status and mass changes of Himalayan-Karakoram glaciers
    Cambridge University Press (CUP) ; 2018
    In:  Journal of Glaciology Vol. 64, No. 243 ( 2018-02), p. 61-74
    Details
    In: Journal of Glaciology, Cambridge University Press (CUP), Vol. 64, No. 243 ( 2018-02), p. 61-74
    Abstract: We present a comprehensive review of the status and changes in glacier length (since the 1850s), area and mass (since the 1960s) along the Himalayan-Karakoram (HK) region and their climate-change context. A quantitative reliability classification of the field-based mass-balance series is developed. Glaciological mass balances agree better with remotely sensed balances when we make an objective, systematic exclusion of likely flawed mass-balance series. The Himalayan mean glaciological mass budget was similar to the global average until 2000, and likely less negative after 2000. Mass wastage in the Himalaya resulted in increasing debris cover, the growth of glacial lakes and possibly decreasing ice velocities. Geodetic measurements indicate nearly balanced mass budgets for Karakoram glaciers since the 1970s, consistent with the unchanged extent of supraglacial debris-cover. Himalayan glaciers seem to be sensitive to precipitation partly through the albedo feedback on the short-wave radiation balance. Melt contributions from HK glaciers should increase until 2050 and then decrease, though a wide range of present-day area and volume estimates propagates large uncertainties in the future runoff. This review reflects an increasing understanding of HK glaciers and highlights the remaining challenges.
    Type of Medium: Online Resource
    ISSN: 0022-1430 , 1727-5652
    URL: Article
    DOI: 10.1017/jog.2017.86
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 2018
    detail.hit.zdb_id: 2140541-4
    SSG: 14
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  • 6
    Online Resource
    Online Resource
    Karakoram geodetic glacier mass balances between 2008 and 2016: persistence of the anomaly and influence of a large rock avalanche on Siachen Glacier
    Cambridge University Press (CUP) ; 2019
    In:  Journal of Glaciology Vol. 65, No. 251 ( 2019-06), p. 494-507
    Details
    In: Journal of Glaciology, Cambridge University Press (CUP), Vol. 65, No. 251 ( 2019-06), p. 494-507
    Abstract: Karakoram glaciers experienced balanced or slightly positive mass budgets since at least the 1970s. Here, we provide an update on the state of balance of Central and Eastern Karakoram glaciers (12 000 km 2 ) between 2008 and 2016 by differencing DEMs derived from satellite optical images. The mass budget of Central Karakoram glaciers was slightly positive (0.12 ± 0.14 m w.e. a −1 ) while eastern Karakoram glaciers lost mass (−0.24 ± 0.12 m w.e. a −1 ). The glacier-wide mass balances of surge-type and nonsurge-type glaciers were not statistically different. Our elevation change data also depict the effect of a 〉 100 Mm 3 rock avalanche on Siachen Glacier ablation area in September 2010. It covered a 4 km 2 area with a thick debris layer that unexpectedly, led to locally enhanced glacier mass loss during the following years. Enhanced melt opened a 〉 100 m deep 2 km 2 depression and contributed to 6% of the mass loss of Siachen Glacier from 2010 to 2016 (−0.39 m w.e. a −1 ). We hypothesize that sub- or englacial melt may be responsible for this intriguing behaviour. This study contributes to a better knowledge of the regional pattern of the Karakoram anomaly and of the influence of rock avalanches on glacier mass changes.
    Type of Medium: Online Resource
    ISSN: 0022-1430 , 1727-5652
    URL: Article
    DOI: 10.1017/jog.2019.32
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 2019
    detail.hit.zdb_id: 2140541-4
    SSG: 14
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  • 7
    Online Resource
    Online Resource
    The geodetic mass balance of Eyjafjallajökull ice cap for 1945–2014: processing guidelines and relation to climate
    Cambridge University Press (CUP) ; 2019
    In:  Journal of Glaciology Vol. 65, No. 251 ( 2019-06), p. 395-409
    Details
    In: Journal of Glaciology, Cambridge University Press (CUP), Vol. 65, No. 251 ( 2019-06), p. 395-409
    Abstract: Mass-balance measurements of Icelandic glaciers are sparse through the 20th century. However, the large archive of stereo images available allows estimates of glacier-wide mass balance ( $\dot{B}$ ) in decadal time steps since 1945. Combined with climate records, they provide further insight into glacier–climate relationship. This study presents a workflow to process aerial photographs (1945–1995), spy satellite imagery (1977–1980) and modern satellite stereo images (since 2000) using photogrammetric techniques and robust statistics in a highly automated, open-source pipeline to retrieve seasonally corrected, decadal glacier-wide geodetic mass balances. In our test area, Eyjafjallajökull (S-Iceland, ~70 km 2 ), we obtain a mass balance of $〈![CDATA[ $ \dot{\curr B}_{\curr 1945}^{\curr 2014} \curr = -0.27 \pm 0.03\,{\rm \curr m\ w}{\rm. \curr e}{\rm.} {\rm \curr a}^{{\rm \ndash \curr 1}}$ , with a maximum and minimum of $\dot{\curr B}_{\curr 1984}^{\curr 1989} \curr = 0.77 \curr \pm 0.19\,{\rm \curr m\ \curr w}{\rm\curr . e}{\rm\curr .} {\rm\curr a}^{{\rm\curr \ndash 1}}$ and $\dot{\curr B}_{\curr 1994}^{\curr 1998}\curr = -1.94 \curr \pm 0.34\,{\rm \curr m\ w}{\rm\curr . e}{\rm\curr .} {\rm \curr a}^{{\rm\curr \ndash 1}}$ , respectively, attributed to climatic forcing, and $\dot{\curr B}_{\curr 2009}^{\curr 2010} \curr = -3.39{\rm \;} \curr \pm {\rm \;} \curr 0.43\,{\rm \curr m\ w}{\rm\curr . e}{\rm\curr .} {\rm\curr a}^{{\rm\curr \ndash 1}}$ , mostly caused by the April 2010 eruption. The reference-surface mass balances correlate with summer temperature and winter precipitation, and linear regression accounts for 80% of the mass-balance variability, yielding a static sensitivity of mass balance to summer temperature and winter precipitation of − 2.1 ± 0.4 m w.e.a –1 K –1 and 0.5 ± 0.3 m w.e.a –1 (10%) –1 , respectively. This study serves as a template that can be used to estimate the mass-balance changes and glaciers' response to climate.
    Type of Medium: Online Resource
    ISSN: 0022-1430 , 1727-5652
    URL: Article
    DOI: 10.1017/jog.2019.16
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 2019
    detail.hit.zdb_id: 2140541-4
    SSG: 14
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  • 8
    Online Resource
    Online Resource
    New velocity map and mass-balance estimate of Mertz Glacier, East Antarctica, derived from Landsat sequential imagery
    International Glaciological Society ; 2003
    In:  Journal of Glaciology Vol. 49, No. 167 ( 2003), p. 503-511
    Details
    In: Journal of Glaciology, International Glaciological Society, Vol. 49, No. 167 ( 2003), p. 503-511
    Abstract: Automatic feature tracking on two Landsat images (acquired inJanuary 2000 and December 2001) generates a complete and accurate velocity field of Mertz Glacier, East Antarctica. This velocity field shows two main tributaries to the ice stream. Between the tributaries, a likely obstruction feature in the bedrock results in a slow-down of the flow. A third Landsat image, acquired in 1989 and combined with the 2000 image, permits the determination of the glacier mean velocity during the 1990s. Although some parts of the Mertz Glacier system show evidence of slight speed increase, we conclude that the Mertz flow speed is constant within our uncertainty (35 m a −1 ). Using this complete velocity field, new estimates of the ice discharge flux, 17.8 km 3 a −1 (16.4 Gt a −1 ), and of the basal melting of the tongue, 11 m a −1 of ice, are given. Our results lead to an apparent imbalance of the drainage basin (ice discharge 3.5 km 3 a −1 lower than the accumulation). Considering previous studies in the Mertz Glacier area, we then discuss the uncertainty of this imbalance and the problems with accumulation mapping for this region.
    Type of Medium: Online Resource
    ISSN: 0022-1430 , 1727-5652
    URL: Article
    DOI: 10.3189/172756503781830377
    Language: English
    Publisher: International Glaciological Society
    Publication Date: 2003
    detail.hit.zdb_id: 2140541-4
    SSG: 14
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  • 9
    Online Resource
    Online Resource
    Massive collapse of two glaciers in western Tibet in 2016 after surge-like instability
    Springer Science and Business Media LLC ; 2018
    In:  Nature Geoscience Vol. 11, No. 2 ( 2018-2), p. 114-120
    Details
    In: Nature Geoscience, Springer Science and Business Media LLC, Vol. 11, No. 2 ( 2018-2), p. 114-120
    Type of Medium: Online Resource
    ISSN: 1752-0894 , 1752-0908
    URL: Article
    DOI: 10.1038/s41561-017-0039-7
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2018
    detail.hit.zdb_id: 2396648-8
    detail.hit.zdb_id: 2405323-5
    SSG: 16,13
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  • 10
    Online Resource
    Online Resource
    Ice loss processes in the Seal Nunataks ice shelf region from satellite altimetry and imagery
    International Glaciological Society ; 2016
    In:  Annals of Glaciology Vol. 57, No. 73 ( 2016-09), p. 94-104
    Details
    In: Annals of Glaciology, International Glaciological Society, Vol. 57, No. 73 ( 2016-09), p. 94-104
    Abstract: The Seal Nunataks ice shelf (SNIS, ~743 km 2 in 2013) is an unofficial name for a remnant area between the former Larsen A and Larsen B ice shelves off the northeastern Antarctic Peninsula. Analyses using Landsat 7 ETM+ and Terra ASTER images from 2001 to 13 and ICESat altimetry from 2003 to 09 show it has retreated and thinned following the Larsen A (1995) and Larsen B (2002) disintegrations. Despite some regional cooling and more fast ice since 2008, SNIS continues to lose ice along its margins and may be losing contact with some nunataks. Detailed analysis of data from four ICESat tracks indicates that ice shelf thinning rates range between 1.9 and 2.7 m a −1 , and generally increase from west to east. An ICESat repeat track crossing the adjacent Robertson Island shows a mean elevation loss of 1.8 m a −1 . Two tracks crossing the SNIS's remaining tributary, Rogosh Glacier, show sub-meter elevation losses. Comparing shelf remnant and grounded ice thinning rates implies that basal ocean melting augments SNIS thinning by ~1 m a −1 , a rate that is consistent with other estimates of ocean-driven shelf thinning in the region.
    Type of Medium: Online Resource
    ISSN: 0260-3055 , 1727-5644
    URL: Article
    DOI: 10.1017/aog.2016.29
    Language: English
    Publisher: International Glaciological Society
    Publication Date: 2016
    detail.hit.zdb_id: 2122400-6
    SSG: 14
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