TY  - JOUR
AU  - Marine Bourriquen, Agnès Baltzer
PY  - 2016//
TI  - Coastal evolution and sedimentary mobility of Brøgger Peninsula, northwest Spitsbergen
KW  - High Arctic Paraglacial Sedimentary flux Submarine and aerial coastal evolution Svalbard
N2  - Since the end of the Little Ice Age (LIA), Svalbard glaciers have undergone a net retreat in response to changing meteorological conditions. Located between 76°N and 80°N, western Spitsbergen has seen a climatic transition from a glacial to a paraglacial system. On the northern shore of the Brøgger Peninsula (northwest Spitsbergen), the average temperature increased by 3 °C between 1965 and 2015, and cold-based valley glaciers have retreated more than 1 km from their LIA limits. This rapid deglaciation has exposed large areas of glacigenic sediments being easily reworked by runoff. This has led to the formation of extensive glacier-river delta systems and coastal progradation. Post-LIA coastal progradation and formation of new landforms in Kongsfjorden have been controlled predominantly by substantial availability of glacial sediment. A combination of aerial photographic and field data has been employed to estimate the post-LIA evolution of coastal sandur deltas and their submarine parts (named here “prodeltas”). The data set reveals that delta shoreline advance could have reached around 5 m/year. between 1966 and 1990 for the most energetic delta of Austre Lovenbreen, and around 4 m/year between 2011 and 2014 for the most energetic delta of Midtre Lovenbreen. The prodeltas registered a net growth from 2009 to 2012: the biggest, located in the prolongation of deltas of Austre Lovenbreen, measured 1033 m in length in 2009 and 1180 m in length in 2012. This substantial amount of sediment supplied in the fjord has an impact on the fjord ecology, especially on the benthic ecosystem.
SN  - 1432-2056
UR  - http://dx.doi.org/10.1007/s00300-016-1930-1
N1  - exported from refbase (http://publi.ipev.fr/polar_references/show.php?record=8768), last updated on Mon, 01 Jul 2024 15:07:00 +0200
ID  - MarineBourriquen2016
ER  -