Geometric parameters of shoreface profiles of Laptev Sea erosion coast (Table 1)
Field investigations of the Laptev Sea shoreface morphology were carried out (1) off erosional shores composed of unconsolidated sediments, (2) off the modern delta shores of the Lena River, and (3) off rocky shores. It was found that profiles off erosional shores had a concave shape. This shape is...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.425282 2023-05-15T17:07:12+02:00 Geometric parameters of shoreface profiles of Laptev Sea erosion coast (Table 1) Are, Felix Grigoriev, Mikhail N Hubberten, Hans-Wolfgang Rachold, Volker Razumov, Sergey O Schneider, Waldemar MEDIAN LATITUDE: 73.371113 * MEDIAN LONGITUDE: 127.241093 * SOUTH-BOUND LATITUDE: 71.333300 * WEST-BOUND LONGITUDE: 113.250000 * NORTH-BOUND LATITUDE: 74.833300 * EAST-BOUND LONGITUDE: 145.583300 2002-10-13 text/tab-separated-values, 104 data points https://doi.pangaea.de/10.1594/PANGAEA.425282 https://doi.org/10.1594/PANGAEA.425282 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.425282 https://doi.org/10.1594/PANGAEA.425282 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Are, Felix; Grigoriev, Mikhail N; Hubberten, Hans-Wolfgang; Rachold, Volker; Razumov, Sergey O; Schneider, Waldemar (2002): Comparative shoreface evolution along the Laptev Sea coast. Polarforschung, 70, 135-150, hdl:10013/epic.29866.d001 Area/locality Inclination Laptev Sea System LATITUDE Lithology/composition/facies LONGITUDE LSS Measured Shoreface depth Visual description Width Dataset 2002 ftpangaea https://doi.org/10.1594/PANGAEA.425282 2023-01-20T08:15:54Z Field investigations of the Laptev Sea shoreface morphology were carried out (1) off erosional shores composed of unconsolidated sediments, (2) off the modern delta shores of the Lena River, and (3) off rocky shores. It was found that profiles off erosional shores had a concave shape. This shape is not well described by commonly applied power functions, a feature, which is in disagreement with the generally accepted concept of the equilibrium shape of shoreface profiles. The position of the lower shoreface boundary is determined by the elevation of the coastal lowland inundated during the last transgression (at -5 to -10 m) and may easily be recognized by a sharp, an order of magnitude decrease in the mean inclination of the sea floor. The mean shoreface inclination depends on sediment grain-size and ranges from 0.0022 to 0.033. The concave shape of the shoreface did not change substantially during the last 20-30 years, which indicates that shoreline retreat did not slow down and hence suggests continued intensive coastal erosion in the 21st century. The underwater part of the Lena River delta extends up to 35 km offshore. Its upper part is formed by a shallow and up to 18-km wide bench, which reaches depths of 2-3 m along the outer edge. The evolution of the delta was irregular. Whereas some parts of the delta are advancing rapidly (58 m/year), other parts are eroding. Comparison of measured profiles with older bathymetric data gave an opportunity to evaluate the changes of the underwater delta over past decades. Bathymetric surveys of the seabed around the delta can thus contribute towards a quantification of the sediment budget of the river-sea system. In addition, some sections of the Laptev Sea coast are composed of bedrock that has a comparatively low resistance to wave erosion. These sections may supply a considerable amount of sediment, especially if the cliffs are high. This source must therefore also be taken into account when assessing the contribution of shore erosion to the Laptev Sea sediment ... Dataset laptev Laptev Sea lena river Polarforschung PANGAEA - Data Publisher for Earth & Environmental Science Laptev Sea ENVELOPE(113.250000,145.583300,74.833300,71.333300) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Area/locality Inclination Laptev Sea System LATITUDE Lithology/composition/facies LONGITUDE LSS Measured Shoreface depth Visual description Width |
spellingShingle |
Area/locality Inclination Laptev Sea System LATITUDE Lithology/composition/facies LONGITUDE LSS Measured Shoreface depth Visual description Width Are, Felix Grigoriev, Mikhail N Hubberten, Hans-Wolfgang Rachold, Volker Razumov, Sergey O Schneider, Waldemar Geometric parameters of shoreface profiles of Laptev Sea erosion coast (Table 1) |
topic_facet |
Area/locality Inclination Laptev Sea System LATITUDE Lithology/composition/facies LONGITUDE LSS Measured Shoreface depth Visual description Width |
description |
Field investigations of the Laptev Sea shoreface morphology were carried out (1) off erosional shores composed of unconsolidated sediments, (2) off the modern delta shores of the Lena River, and (3) off rocky shores. It was found that profiles off erosional shores had a concave shape. This shape is not well described by commonly applied power functions, a feature, which is in disagreement with the generally accepted concept of the equilibrium shape of shoreface profiles. The position of the lower shoreface boundary is determined by the elevation of the coastal lowland inundated during the last transgression (at -5 to -10 m) and may easily be recognized by a sharp, an order of magnitude decrease in the mean inclination of the sea floor. The mean shoreface inclination depends on sediment grain-size and ranges from 0.0022 to 0.033. The concave shape of the shoreface did not change substantially during the last 20-30 years, which indicates that shoreline retreat did not slow down and hence suggests continued intensive coastal erosion in the 21st century. The underwater part of the Lena River delta extends up to 35 km offshore. Its upper part is formed by a shallow and up to 18-km wide bench, which reaches depths of 2-3 m along the outer edge. The evolution of the delta was irregular. Whereas some parts of the delta are advancing rapidly (58 m/year), other parts are eroding. Comparison of measured profiles with older bathymetric data gave an opportunity to evaluate the changes of the underwater delta over past decades. Bathymetric surveys of the seabed around the delta can thus contribute towards a quantification of the sediment budget of the river-sea system. In addition, some sections of the Laptev Sea coast are composed of bedrock that has a comparatively low resistance to wave erosion. These sections may supply a considerable amount of sediment, especially if the cliffs are high. This source must therefore also be taken into account when assessing the contribution of shore erosion to the Laptev Sea sediment ... |
format |
Dataset |
author |
Are, Felix Grigoriev, Mikhail N Hubberten, Hans-Wolfgang Rachold, Volker Razumov, Sergey O Schneider, Waldemar |
author_facet |
Are, Felix Grigoriev, Mikhail N Hubberten, Hans-Wolfgang Rachold, Volker Razumov, Sergey O Schneider, Waldemar |
author_sort |
Are, Felix |
title |
Geometric parameters of shoreface profiles of Laptev Sea erosion coast (Table 1) |
title_short |
Geometric parameters of shoreface profiles of Laptev Sea erosion coast (Table 1) |
title_full |
Geometric parameters of shoreface profiles of Laptev Sea erosion coast (Table 1) |
title_fullStr |
Geometric parameters of shoreface profiles of Laptev Sea erosion coast (Table 1) |
title_full_unstemmed |
Geometric parameters of shoreface profiles of Laptev Sea erosion coast (Table 1) |
title_sort |
geometric parameters of shoreface profiles of laptev sea erosion coast (table 1) |
publisher |
PANGAEA |
publishDate |
2002 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.425282 https://doi.org/10.1594/PANGAEA.425282 |
op_coverage |
MEDIAN LATITUDE: 73.371113 * MEDIAN LONGITUDE: 127.241093 * SOUTH-BOUND LATITUDE: 71.333300 * WEST-BOUND LONGITUDE: 113.250000 * NORTH-BOUND LATITUDE: 74.833300 * EAST-BOUND LONGITUDE: 145.583300 |
long_lat |
ENVELOPE(113.250000,145.583300,74.833300,71.333300) |
geographic |
Laptev Sea |
geographic_facet |
Laptev Sea |
genre |
laptev Laptev Sea lena river Polarforschung |
genre_facet |
laptev Laptev Sea lena river Polarforschung |
op_source |
Supplement to: Are, Felix; Grigoriev, Mikhail N; Hubberten, Hans-Wolfgang; Rachold, Volker; Razumov, Sergey O; Schneider, Waldemar (2002): Comparative shoreface evolution along the Laptev Sea coast. Polarforschung, 70, 135-150, hdl:10013/epic.29866.d001 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.425282 https://doi.org/10.1594/PANGAEA.425282 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.425282 |
_version_ |
1766062486754164736 |