{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,30]],"date-time":"2026-04-30T22:04:22Z","timestamp":1777586662437,"version":"3.51.4"},"reference-count":59,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2020,6,3]],"date-time":"2020-06-03T00:00:00Z","timestamp":1591142400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Monitoring variability in outlet glaciers can improve the understanding of feedbacks associated with calving, ocean thermal forcing, and climate change. In this study, we present a remote-sensing investigation of Dalk Glacier in East Antarctica to analyze its dynamic changes. Terminus positions and surface ice velocities were estimated from Landsat and Sentinel-1 data, and the high-precision Worldview digital elevation model (DEM) was generated to determine the location of the potential ice rumple. We detected the cyclic behavior of glacier terminus changes and similar periodic increases in surface velocity since 2000. The terminus retreated in 2006, 2009, 2010, and 2016 and advanced in other years. The surface velocity of Dalk Glacier has a 5-year cycle with interannual speed-ups in 2007, 2012, and 2017. Our observations show the relationship between velocity changes and terminus variations, as well as the driving role of the ice rumple. Ice velocity often increases after calving events and continuous retreats. The loss of buttressing provided by an ice rumple may be a primary factor for increases in ice velocity. Given the restriction of the ice rumple, the surface velocity remains relatively stable when the glacier advances. The calving events may be linked to the unstable terminus caused by the ice rumple.<\/jats:p>","DOI":"10.3390\/rs12111809","type":"journal-article","created":{"date-parts":[[2020,6,4]],"date-time":"2020-06-04T04:36:09Z","timestamp":1591245369000},"page":"1809","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":19,"title":["Dynamics of Dalk Glacier in East Antarctica Derived from Multisource Satellite Observations Since 2000"],"prefix":"10.3390","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6886-1179","authenticated-orcid":false,"given":"Yiming","family":"Chen","sequence":"first","affiliation":[{"name":"Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, China"},{"name":"Key Laboratory of Polar Surveying and Mapping, Ministry of Natural Resources of the People\u2019s Republic of China, Wuhan 430079, China"}]},{"given":"Chunxia","family":"Zhou","sequence":"additional","affiliation":[{"name":"Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, China"},{"name":"Key Laboratory of Polar Surveying and Mapping, Ministry of Natural Resources of the People\u2019s Republic of China, Wuhan 430079, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6677-3899","authenticated-orcid":false,"given":"Songtao","family":"Ai","sequence":"additional","affiliation":[{"name":"Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, China"},{"name":"Key Laboratory of Polar Surveying and Mapping, Ministry of Natural Resources of the People\u2019s Republic of China, Wuhan 430079, China"}]},{"given":"Qi","family":"Liang","sequence":"additional","affiliation":[{"name":"Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, China"},{"name":"Key Laboratory of Polar Surveying and Mapping, Ministry of Natural Resources of the People\u2019s Republic of China, Wuhan 430079, China"}]},{"given":"Lei","family":"Zheng","sequence":"additional","affiliation":[{"name":"Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, China"},{"name":"Key Laboratory of Polar Surveying and Mapping, Ministry of Natural Resources of the People\u2019s Republic of China, Wuhan 430079, China"}]},{"given":"Ruixi","family":"Liu","sequence":"additional","affiliation":[{"name":"Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, China"},{"name":"Key Laboratory of Polar Surveying and Mapping, Ministry of Natural Resources of the People\u2019s Republic of China, Wuhan 430079, China"}]},{"given":"Haobo","family":"Lei","sequence":"additional","affiliation":[{"name":"Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, China"},{"name":"Key Laboratory of Polar Surveying and Mapping, Ministry of Natural Resources of the People\u2019s Republic of China, Wuhan 430079, China"}]}],"member":"1968","published-online":{"date-parts":[[2020,6,3]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Dupont, T.K., and Alley, R.B. (2005). Assessment of the importance of ice-shelf buttressing to ice-sheet flow. Geophys. Res. Lett., 32.","DOI":"10.1029\/2004GL022024"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"479","DOI":"10.1038\/nclimate2912","article-title":"The safety band of Antarctic ice shelves","volume":"6","author":"Durand","year":"2016","journal-title":"Nat. Clim. Chang."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"89","DOI":"10.1038\/nature12567","article-title":"Calving fluxes and basal melt rates of Antarctic ice shelves","volume":"502","author":"Depoorter","year":"2013","journal-title":"Nature"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"58","DOI":"10.1038\/nclimate3180","article-title":"Meltwater produced by wind-albedo interaction stored in an East Antarctic ice shelf","volume":"7","author":"Lenaerts","year":"2016","journal-title":"Nat. Clim. Chang."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"53","DOI":"10.1038\/s41558-017-0020-x","article-title":"The far reach of ice-shelf thinning in Antarctica","volume":"8","author":"Reese","year":"2017","journal-title":"Nat. Clim. Chang."},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Scambos, T.A., Bohlander, J.A., Shuman, C.A., and Skvarca, P. (2004). Glacier acceleration and thinning after ice shelf collapse in the Larsen B embayment, Antarctica. Geophys. Res. Lett., 31.","DOI":"10.1029\/2004GL020670"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"5355","DOI":"10.1002\/2015GL064355","article-title":"Modeling the instantaneous response of glaciers after the collapse of the Larsen B Ice Shelf","volume":"42","author":"Gudmundsson","year":"2015","journal-title":"Geophys. Res. Lett."},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Shepherd, A., Wingham, D., Wallis, D., Giles, K., Laxon, S., and Sundal, A.V. (2010). Recent loss of floating ice and the consequent sea level contribution. Geophys. Res. Lett., 37.","DOI":"10.1029\/2010GL042496"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"13903","DOI":"10.1029\/2019GL085027","article-title":"Instantaneous Antarctic ice sheet mass loss driven by thinning ice shelves","volume":"46","author":"Gudmundsson","year":"2019","journal-title":"Geophys. Res. Lett."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"971","DOI":"10.1038\/nature08471","article-title":"Extensive dynamic thinning on the margins of the Greenland and Antarctic ice sheets","volume":"461","author":"Pritchard","year":"2009","journal-title":"Nature"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"327","DOI":"10.1126\/science.aaa0940","article-title":"Volume loss from Antarctic ice shelves is accelerating","volume":"348","author":"Paolo","year":"2015","journal-title":"Science"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"266","DOI":"10.1126\/science.1235798","article-title":"Ice-shelf melting around Antarctica","volume":"341","author":"Rignot","year":"2013","journal-title":"Science"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"243","DOI":"10.1023\/A:1026021217991","article-title":"Recent rapid regional climate warming on the Antarctic Peninsula","volume":"60","author":"Vaughan","year":"2003","journal-title":"Clim. Chang."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"328","DOI":"10.1038\/379328a0","article-title":"Recent atmospheric warming and retreat of ice shelves on the Antarctic Peninsula","volume":"379","author":"Vaughan","year":"1996","journal-title":"Nature"},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Meredith, M.P., and King, J.C. (2005). Rapid climate change in the ocean west of the Antarctic Peninsula during the second half of the 20th century. Geophys. Res. Lett., 32.","DOI":"10.1029\/2005GL024042"},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Stammerjohn, S.E., Martinson, D.G., Smith, R.C., Yuan, X., and Rind, D. (2008). Trends in Antarctic annual sea ice retreat and advance and their relation to El Ni\u00f1o\u2013Southern Oscillation and Southern Annular Mode variability. J. Geophys. Res., 113.","DOI":"10.1029\/2007JC004269"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"502","DOI":"10.1038\/nature10968","article-title":"Antarctic ice-sheet loss driven by basal melting of ice shelves","volume":"484","author":"Pritchard","year":"2012","journal-title":"Nature"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"e1501350","DOI":"10.1126\/sciadv.1501350","article-title":"Pan-ice-sheet glacier terminus change in East Antarctica reveals sensitivity of Wilkes Land to sea-ice changes","volume":"2","author":"Miles","year":"2016","journal-title":"Sci. Adv."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"827","DOI":"10.1038\/ngeo356","article-title":"Increased flow speed on a large east antarctic outlet glacier caused by subglacial floods","volume":"1","author":"Stearns","year":"2008","journal-title":"Nat. Geosci."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"1095","DOI":"10.1073\/pnas.1812883116","article-title":"Four decades of Antarctic Ice Sheet mass balance from 1979\u20132017","volume":"116","author":"Rignot","year":"2019","journal-title":"Proc. Natl. Acad. Sci. USA"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"279","DOI":"10.1017\/jog.2019.6","article-title":"Ice flow variations at Polar Record Glacier, East Antarctica","volume":"65","author":"Liang","year":"2019","journal-title":"J. Glaciol."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"6366","DOI":"10.1002\/2016GL069173","article-title":"Ice flow dynamics and mass loss of Totten Glacier, East Antarctica, from 1989 to 2015","volume":"43","author":"Li","year":"2016","journal-title":"Geophys. Res. Lett."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"30","DOI":"10.1016\/j.rse.2017.01.003","article-title":"The Mertz Glacier Tongue, East Antarctica. Changes in the past 100 years and its cyclic nature-Past, present and future","volume":"191","author":"Giles","year":"2017","journal-title":"Remote Sens. Environ."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"724","DOI":"10.1016\/j.earscirev.2015.09.004","article-title":"Antarctic ice rises and rumples: Their properties and significance for ice-sheet dynamics and evolution","volume":"150","author":"Matsuoka","year":"2015","journal-title":"Earth-Sci. Rev."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"225","DOI":"10.1038\/nature25026","article-title":"Initiation and long-term instability of the East Antarctic Ice Sheet","volume":"552","author":"Gulick","year":"2017","journal-title":"Nature"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"867","DOI":"10.5194\/tc-8-867-2014","article-title":"Transition of flow regime along a marine-terminating outlet glacier in East Antarctica","volume":"8","author":"Callens","year":"2014","journal-title":"Cryosphere"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"101","DOI":"10.5194\/tc-6-101-2012","article-title":"A three-dimensional full Stokes model of the grounding line dynamics: Effect of a pinning point beneath the ice shelf","volume":"6","author":"Favier","year":"2012","journal-title":"Cryosphere"},{"key":"ref_28","doi-asserted-by":"crossref","unstructured":"Kim, S.H., Kim, D., and Kim, H.-C. (2018). Progressive Degradation of an Ice Rumple in the Thwaites Ice Shelf, Antarctica, as Observed from High-Resolution Digital Elevation Models. Remote Sens., 10.","DOI":"10.3390\/rs10081236"},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"175","DOI":"10.1144\/SP461.6","article-title":"Ocean forced variability of Totten Glacier mass loss","volume":"461","author":"Roberts","year":"2018","journal-title":"Geol. Soc. Lond. Spec. Publ."},{"key":"ref_30","first-page":"117","article-title":"The study of remote sensing on monitoring ice velocities of the Polar Record Glacier and the Dark Glacier","volume":"13","author":"Sun","year":"2001","journal-title":"Chin. J. Polar Res."},{"key":"ref_31","first-page":"446","article-title":"Monitoring the changes of ice shelf and glaciers around Zhongshan Station using multiple-source remote sensing data","volume":"29","author":"Liu","year":"2017","journal-title":"Chin. J. Polar Res."},{"key":"ref_32","first-page":"1150","article-title":"Surface flow features of the Dark Glacier in East Antarctica from in-situ observation","volume":"37","author":"Huang","year":"2015","journal-title":"J. Glaciol. Geocryol."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"13","DOI":"10.1016\/j.polar.2018.09.003","article-title":"High-precision ice-flow velocities from ground observations on Dalk Glacier, Antarctica","volume":"19","author":"Ai","year":"2019","journal-title":"Polar Sci."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"665","DOI":"10.5194\/tc-13-665-2019","article-title":"The reference elevation model of antarctica","volume":"13","author":"Howat","year":"2019","journal-title":"Cryosphere"},{"key":"ref_35","unstructured":"Scambos, T., Fahnestock, M., Moon, T., Gardner, A., and Klinger, M. (2016). Global Land Ice Velocity Extraction from Landsat 8 (GoLIVE), NSIDC (National Snow and Ice Data Center)."},{"key":"ref_36","unstructured":"Zwally, H.J., Schutz, R., Bentley, C., Bufton, J., Herring, T., Minster, J., Spinhirne, J., and Thomas, R. (2014). GLAS\/ICESat L2 Antarctic and Greenland Ice Sheet Altimetry Data, Version 34, NASA National Snow and Ice Data Center Distributed Active Archive Center."},{"key":"ref_37","unstructured":"Allison, I., and Hyland, G. (2017, December 20). Amery Ice Shelf Compiled and Merged Ice Thickness Datasets, Australian Antarctic Data Centre, Available online: https:\/\/data.aad.gov.au\/metadata\/records\/AIS_thickness_bottom."},{"key":"ref_38","doi-asserted-by":"crossref","unstructured":"Moon, T., and Joughin, I. (2008). Changes in ice front position on Greenland\u2019s outlet glaciers from 1992 to 2007. J. Geophys. Res., 113.","DOI":"10.1029\/2007JF000927"},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"1529","DOI":"10.1109\/TGRS.2006.888937","article-title":"Automatic and precise orthorectification, coregistration, and subpixel correlation of satellite images, application to ground deformation measurements","volume":"45","author":"Leprince","year":"2007","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"3806","DOI":"10.1016\/j.rse.2008.05.018","article-title":"Glacier-surface velocities in alpine terrain from optical satellite imagery\u2014Accuracy improvement and quality assessment","volume":"112","author":"Scherler","year":"2008","journal-title":"Remote Sens. Environ."},{"key":"ref_41","unstructured":"Scaramuzza, P., Micijevic, E., and Chander, G. (2004). SLC gap-filled products phase one methodology, Landsat Technical Notes, Volume No. 5."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"1305","DOI":"10.1016\/j.procs.2016.09.246","article-title":"Sentinel-1 support in the GAMMA Software","volume":"100","author":"Werner","year":"2016","journal-title":"Procedia Comput. Sci."},{"key":"ref_43","unstructured":"Werner, C., Wegm\u00fcller, U., Strozzi, T., and Wiesmann, A. (2000, January 16\u201320). Gamma SAR and interferometric processing software. Proceedings of the ERS-ENVISAT Symposium, Gothenburg, Sweden."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"2384","DOI":"10.1109\/TGRS.2002.805079","article-title":"Glacier motion estimation using SAR offset-tracking procedures","volume":"40","author":"Strozzi","year":"2002","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_45","doi-asserted-by":"crossref","unstructured":"S\u00e1nchez-G\u00e1mez, P., and Navarro, F.J. (2017). Glacier Surface Velocity Retrieval Using D-InSAR and Offset Tracking Techniques Applied to Ascending and Descending Passes of Sentinel-1 Data for Southern Ellesmere Ice Caps, Canadian Arctic. Remote Sens., 9.","DOI":"10.3390\/rs9050442"},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"358","DOI":"10.1016\/j.rse.2016.09.001","article-title":"cheol Variations in ice velocities of Pine Island Glacier Ice Shelf evaluated using multispectral image matching of Landsat time series data","volume":"186","author":"Han","year":"2016","journal-title":"Remote Sens. Environ."},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"84","DOI":"10.1016\/j.rse.2015.11.023","article-title":"Rapid large-area mapping of ice flow using Landsat 8","volume":"185","author":"Fahnestock","year":"2016","journal-title":"Remote Sens. Environ."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"244","DOI":"10.1016\/j.rse.2015.11.001","article-title":"Recent changes in glacier velocities and thinning at Novaya Zemlya","volume":"174","author":"Melkonian","year":"2016","journal-title":"Remote Sens. Environ."},{"key":"ref_49","doi-asserted-by":"crossref","unstructured":"Wendleder, A., Friedl, P., and Mayer, C. (2018). Impacts of climate and supraglacial lakes on the surface velocity of Baltoro Glacier from 1992 to 2017. Remote Sens., 10.","DOI":"10.3390\/rs10111681"},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"485","DOI":"10.3189\/002214311796905659","article-title":"Antarctic ice-shelf thickness from satellite radar altimetry","volume":"57","author":"Griggs","year":"2011","journal-title":"J. Glaciol."},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"2241","DOI":"10.1029\/2000GL012461","article-title":"Distribution of marine ice beneath the Amery Ice Shelf","volume":"28","author":"Fricker","year":"2001","journal-title":"Geophys. Res. Lett."},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"809","DOI":"10.5194\/tc-5-809-2011","article-title":"An improved semi-empirical model for the densification of Antarctic firn","volume":"5","author":"Ligtenberg","year":"2011","journal-title":"Cryosphere"},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"1711","DOI":"10.5194\/tc-8-1711-2014","article-title":"Present and future variations in Antarctic firn air content","volume":"8","author":"Ligtenberg","year":"2014","journal-title":"Cryosphere"},{"key":"ref_54","doi-asserted-by":"crossref","unstructured":"Millan, R., Mouginot, J., Rabatel, A., Jeong, S., Cusicanqui, D., Derkacheva, A., and Chekki, M. (2019). Mapping Surface Flow Velocity of Glaciers at Regional Scale Using a Multiple Sensors Approach. Remote Sens., 11.","DOI":"10.3390\/rs11212498"},{"key":"ref_55","first-page":"204","article-title":"Determination of grounding line on the Amery Ice Shelf using Sentinel-1 radar interferometry data","volume":"28","author":"Lei","year":"2017","journal-title":"Adv. Polar Sci."},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"2869","DOI":"10.5194\/tc-12-2869-2018","article-title":"Seasonal dynamics of Totten Ice Shelf controlled by sea ice buttressing","volume":"12","author":"Greene","year":"2018","journal-title":"Cryosphere"},{"key":"ref_57","doi-asserted-by":"crossref","first-page":"60","DOI":"10.1017\/aog.2017.1","article-title":"Systems analysis of complex glaciological processes and application to calving of Amery Ice Shelf, East Antarctica","volume":"58","author":"Chester","year":"2017","journal-title":"Ann. Glaciol."},{"key":"ref_58","doi-asserted-by":"crossref","first-page":"4946","DOI":"10.1002\/2016JC011858","article-title":"Basal melt, seasonal water mass transformation, ocean current variability, and deep convection processes along the Amery Ice Shelf calving front, East Antarctica","volume":"121","author":"Church","year":"2016","journal-title":"J. Geophys. Res. Oceans"},{"key":"ref_59","doi-asserted-by":"crossref","first-page":"12577","DOI":"10.1038\/ncomms12577","article-title":"The suppression of Antarctic bottom water formation by melting ice shelves in Prydz Bay","volume":"7","author":"Williams","year":"2016","journal-title":"Nat. Commun."}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/12\/11\/1809\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T09:35:23Z","timestamp":1760175323000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/12\/11\/1809"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020,6,3]]},"references-count":59,"journal-issue":{"issue":"11","published-online":{"date-parts":[[2020,6]]}},"alternative-id":["rs12111809"],"URL":"https:\/\/doi.org\/10.3390\/rs12111809","relation":{},"ISSN":["2072-4292"],"issn-type":[{"value":"2072-4292","type":"electronic"}],"subject":[],"published":{"date-parts":[[2020,6,3]]}}}