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Darji, Simone
- Rift Assessment and Potential Calving Zone of Amery Ice Shelf, East Antarctica
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Authors
Affiliations
1 Geology Department, M.G. Science Institute, Navrangpura, Ahmedabad 380 009,, IN
2 Space Applications Centre, ISRO, Jodhpura Tekra, Ahmedabad 380 015, IN
1 Geology Department, M.G. Science Institute, Navrangpura, Ahmedabad 380 009,, IN
2 Space Applications Centre, ISRO, Jodhpura Tekra, Ahmedabad 380 015, IN
Source
Current Science, Vol 115, No 9 (2018), Pagination: 1799-1804Abstract
Ice shelves line the peripheries of Antarctica. Rift and crevasses are two main deformational structures affecting ice shelf stability. The present study deals with propagation-widening of five active rifts and future potential calving zones on Amery Ice Shelf (AIS), East Antarctica, between 2000 and 2017 using moderate resolution image spectroradiometer (MODIS) data. The widening and rift propagating rate, as well as advancement in AIS show abnormal behaviour. The expansion of AIS differs across the shelf. The highest rate of advancement was observed in 2012–2013 (~517 sq. km) and the lowest was observed in 2000– 2001 (~35 sq. km). The rift system shows variability in its proportion and having poor relationship with environmental processes, which suggests heterogeneities in the AIS. The abnormal behaviour of rift propagation during the study period can be attributed to tsunamis, tide, current action, crevasses pattern and icequakes in the vicinity of the study region.Keywords
Amery Ice Shelf–Lambert Glacier System, Rift System, Potential Calving Zone.References
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Abstract Views :200 |
PDF Views:68
Authors
Affiliations
1 M. G. Science Institute, Gujarat University, Navrangpura, Ahmedabad 380 009, IN
2 Space Applications Centre, ISRO, Jodhpur Tekra, Ahmedabad 380 015, IN
1 M. G. Science Institute, Gujarat University, Navrangpura, Ahmedabad 380 009, IN
2 Space Applications Centre, ISRO, Jodhpur Tekra, Ahmedabad 380 015, IN
Source
Current Science, Vol 116, No 7 (2019), Pagination: 1057-1059Abstract
Iceberg calving event is one of the main processes that removes mass from ice shelves. The large iceberg calving events are a part of the natural cycle, where the frontal portion exceeds beyond its embayment wall and then results into retreat, this process is known as iceberg calving. The calving events are necessary to maintain the mass balance of the ice sheet, which is more frequent in response to atmosphere and ocean warming1. Iceberg calving from ice shelves and glacier tongues might be caused by the impact of ocean waves of various types2.References
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