Mountain lakes are often situated in protected natural areas, a feature that leads to their role as sentinels of global environmental change. The data contain modelling of bathymetry measured for GIS (Shape) in Lake Muzelle in the Massif des Ecrins (WGS84).

Local glacial fluctuations and flood occurrences were investigated in the sediment sequence of proglacial Lake Muzelle - Ecrins National Park - Composite sediment sequence Muz12-I - april 2012 - (IGSN:IEFRA00A4). The sample covers the period from 303 to 2012. Based on geochemical analysis and organic matter content established using loss on ignition and reflectance spectroscopy, we identified six periods of increased glacial activity over the last 1700 yr. Each is in accordance with records from reference glaciers in the Alps. A total of 255 graded layers were identified and interpreted as flood deposits. Most of these occurred during glacial advances such as the Little Ice Age period and exhibit thicker deposits characterized by an increase in the fine grain-size fraction. Fine sediment produced by glacial activity is transported to the proglacial lake during heavy rainfall events. The excess of glacial flour during these periods seems to increase the watershed's tendency to produce flood deposits in the lake sediment, suggesting a strong influence of the glacier on flood reconstruction records. Thus, both flood frequency and intensity, which is estimated based on layer thickness as a proxy, cannot be used in reconstruction of past extreme events because of their variability. There is a need to take into account changes in sediment supply in proglacial areas that could preclude satisfactory interpretation of floods in terms of past climate variability.

Local glacial fluctuations and flood occurrences were investigated in the sediment sequence of proglacial Lake Muzelle - Ecrins national Park - Composite sediment sequance Muz12-I – april 2012 (IGSN:IEFRA00A4). The sample covers the period from 303 to 2012. Based on geochemical analysis and organic matter content established using loss on ignition and reflectance spectroscopy, we identified six periods of increased glacial activity over the last 1700 yr. Each is in accordance with records from reference glaciers in the Alps. A total of 255 graded layers were identified and interpreted as flood deposits. Most of these occurred during glacial advances such as the Little Ice Age period and exhibit thicker deposits characterized by an increase in the fine grain-size fraction. Fine sediment produced by glacial activity is transported to the proglacial lake during heavy rainfall events. The excess of glacial flour during these periods seems to increase the watershed's tendency to produce flood deposits in the lake sediment, suggesting a strong influence of the glacier on flood reconstruction records. Thus, both flood frequency and intensity, which is estimated based on layer thickness as a proxy, cannot be used in reconstruction of past extreme events because of their variability. There is a need to take into account changes in sediment supply in proglacial areas that could preclude satisfactory interpretation of floods in terms of past climate variability.

Local glacial fluctuations and flood occurrences were investigated in the sediment sequence of proglacial Lake Muzelle - Parc national des Ecrins (PNE) - Séquence sédimentaire composite Muz12-I – april 2012 (IGSN:IEFRA00A4). The sample covers the period from 303 to 2012. Granulometry - 2017 Based on geochemical analysis and organic matter content established using loss on ignition and reflectance spectroscopy, we identified six periods of increased glacial activity over the last 1700 yr. Each is in accordance with records from reference glaciers in the Alps. A total of 255 graded layers were identified and interpreted as flood deposits. Most of these occurred during glacial advances such as the Little Ice Age period and exhibit thicker deposits characterized by an increase in the fine grain-size fraction. Fine sediment produced by glacial activity is transported to the proglacial lake during heavy rainfall events. The excess of glacial flour during these periods seems to increase the watershed's tendency to produce flood deposits in the lake sediment, suggesting a strong influence of the glacier on flood reconstruction records. Thus, both flood frequency and intensity, which is estimated based on layer thickness as a proxy, cannot be used in reconstruction of past extreme events because of their variability. There is a need to take into account changes in sediment supply in proglacial areas that could preclude satisfactory interpretation of floods in terms of past climate variability. Glacial fluctuations Glacial focal spot

Limite de l'aire optimale d'adhésion du Parc national des Ecrins. Couche générée par fusion des communes (IGN bd topo fev 2013).

Cheminements autorisés pour le vol à voile à plus de 2800 m d'altitude dans le Parc national des Ecrins

Compilation de différentes couches. Les sites retenus sont considérés comme site de référence dans les activités du parc national.

Couche issue du traitement DELPHINE par le CBNA pour définir l'habitat dominant de chaque polygone. Se reporter au document "Métadonnées habitats.doc" du CBNA pour la description fine. Voir la synthèse sur http://www.ecrins-parcnational.fr/breve/latlas-delphine-est-en-ligne Inventaire terrain réalisé entre 1995 et 2003.

Ensemble des lignes de lecture du PNE. SOURCE : Olivier SENN, relevés des 2 extrémités au GPS en 2008. 2017-01-23 - MAJ avec ajout de la ligne 132 (Le Lauzet)

Limites des sites Natura 2000 dans le Parc national des Ecrins