Type of resources
Continuous hourly time-series of inshore waves spanning the period 2000-2019 are provided alongside topo-bathymetric and tide datasets. The wave dataset starts three years before topographic observations to provide antecedent conditions for morphodynamic modelling purposes. Wave parameters were derived from existing databases furnished by external organisations.
MNT Ailly sont les Modèles Numériques de Terrain acquis au scanner laser terrestre depuis 2014 sur le lieu-dit du Petit Ailly à Varengeville sur Mer. Ces données ont pour objectif de suivre l’évolution de l’érosion des falaises crayeuses.
Core THU10-I : 18m long core An 18-m-long core was extracted in April 2010 from Lake "La Thuile" using a Uwitec platform and coring devices (Uwitec Usinger 90, Niederrreiter 63, Uwitec Gravity Pilote device) . Context of the study : Lake La Thuile, in the Northern French Prealps (874 m a.s.l.), provides an 18-m long sedimentary sequence spanning the entire Lateglacial/Holocene period. The high-resolution multi-proxy (sedimentological, palynological, and geochemical) analysis of the uppermost 6.2 m reveals the Holocene dynamics of erosion in the catchment in response to landscape modifications. The mountain belt is at relevant altitude to study past human activities, and the watershed is sufficiently disconnected from large valleys to capture a local sedimentary signal. From 12,000 to 10,000 cal. BP (10–8 kyr cal. BC), the onset of hardwood species triggered a drop in erosion following the Lateglacial/Holocene transition. From 10,000 to 4500 cal. BP (8–2.5 kyr cal. BC), the forest became denser and favored slope stabilization, while erosion processes were very weak. A first erosive phase was initiated at ca. 4500 cal. BP without evidence of human presence in the catchment. Then, the forest declined at approximately 3000 cal. BP, suggesting the first human influence on the landscape. Two other erosive phases are related to anthropic activities: approximately 2500 cal. BP (550 cal. BC) during the Roman period and after 1600 cal. BP (350 cal. AD) with a substantial accentuation in the Middle Ages. In contrast, the lower erosion produced during the ‘Little Ice Age’, when climate deteriorations are generally considered to result in an increased erosion signal in this region, suggests that anthropic activities dominated the erosive processes and completely masked the natural effects of climate on erosion in the late Holocene. Keywords : climate, Holocene, human activities, montane lake, terrigenous inputs, vegetation
Continuous tidal levels spanning the period 2000-2019 are provided alongside topo-bathymetric and wave datasets. The astronomical tide dataset starts three years before beach morphological observations. Tidal levels were derived from existing databases furnished by external organisations.
MNT Dieppe falaise sont les Modèles Numériques de Terrain acquis au scanner laser terrestre depuis 2014 sur le front de falaise à l'est du sémaphore de Dieppe. Ces données ont pour objectif de suivre l’évolution de l’érosion des falaises crayeuses.
MNT Dieppe sémaphore sont les Modèles Numériques de Terrain acquis au scanner laser terrestre depuis 2014 sur le front de falaise en dessous du sémaphore de Dieppe. Ces données ont pour objectif de suivre l’évolution de l’érosion des falaises crayeuses.
Beach profiling using RTK-GNSS (survey method GPS) represents one of the most convenient method for frequent resurveys. Since 2003, profile surveys have been (approx.) weekly for the first year, fortnightly between January 2004 and June 2005, and near-monthly thereafter, with occasional gaps in the data due to equipment misfunctioning and maintenance. Trimble 5700/5800 and Topcon Hiper V GPS systems were used for data acquisition.
The archived multi-sensor dataset detailed here presents the results of topographic and bathymetric surveys at Porsmilin, a macrotidal pocket (embayed) beach situated in Brittany, in northwest France. The Porsmilin beach survey program was launched in January 2003 by the Institut Universitaire Européen de la Mer (IUEM/Univ. Brest) and is continuing today in the framework of the French coastal observation service SNO-DYNALIT. The dataset contains over 16 years of beach profile surveys and a large collection of recurring high-resolution subtidal and subaerial digital elevation models (DEMs) obtained using various survey methods. The dataset is accompanied by time-series of inshore waves and water levels, and enriched metadata, that will facilitate its future reuse in coastal research. The dataset is structured as follows, with separate metadata (child records) for 1) beach profiles, 2) topographic DEMs, 3) bathymetric DEMs, 4) fusion DEMs, 5) orthophotos, 6) inshore waves and 7) astronomical tides.