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Vulnerability of sandy coasts to climate variability
- Source :
- Climate Research, Climate Research, 2013, 57 (1), pp.19-44. ⟨10.3354/cr01153⟩, Climate Research, Inter Research, 2013, 57 (1), pp.19-44. ⟨10.3354/cr01153⟩, Recercat. Dipósit de la Recerca de Catalunya, instname, UPCommons. Portal del coneixement obert de la UPC, Universitat Politècnica de Catalunya (UPC)
- Publication Year :
- 2013
- Publisher :
- HAL CCSD, 2013.
-
Abstract
- International audience; The main objective of the VULSACO (VULnerability of SAndy COasts to climate change and anthropic pressure) project was to investigate present day and potential future vulnerability of sandy coasts at the 2030 horizon, i.e. on a time scale related to climate variability. The method, based on a multidisciplinary approach bringing together geologists, geographers, physicists , social psychologists, engineers and stakeholders, was structured around 4 axes: field data analysis; numerical modelling; analysis of governance and stakeholder perceptions; and development of vulnerability indexes. This approach was designed to investigate vulnerability at a local scale and was applied to 4 contrasting beaches located in France: Sète Lido (Mediterranean Sea), Truc Vert and La Tresson beaches (Atlantic Ocean), and Dewulf (English Channel). The results focus on decadal and multi-annual beach trends at the Truc Vert beach site. There is almost no trend in beach volume at Truc Vert beach, although there is a variation in this parameter on a cycle of 2 to 3 yr, with variations related to wave energy and probably to indexes of climate variability. Numerical modelling identified the sensitivity of beach responses to changes in wave height and direction, especially in terms of subtidal morphology and the potential development of shoreline instability. Together with the observed offshore wave angle at the Biscay Buoy, these model results suggest that a potential change in wave angle due to climate variability could significantly modify the bars' morphology. The combination of data analysis and numerical modelling contributed to the development of vulnerability indexes designed for sandy coasts, which take into account climate-dependant variables such as waves. This allowed the differentiation of the sites in terms of vulnerability to erosion: Sète Lido and Truc Vert beach were the most and least vulnerable sites, respectively. These indexes help in identifying the dominant components of beach vulnerability, and provide potential for the study of how anthropogenic factors affect vulnerability. The study of stakeholder perceptions and decision-making with regard to climate-related risk also highlighted potential anthropogenic effects on beach vulnerability, and identified possible site-specific outcomes.
- Subjects :
- Atmospheric Science
010504 meteorology & atmospheric sciences
[SDE.MCG]Environmental Sciences/Global Changes
Vulnerability
Climate change
Field data
Present day
010502 geochemistry & geophysics
01 natural sciences
Modelling
Stakeholders
Coasts--Environmental aspects
Wave height
Environmental Chemistry
14. Life underwater
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment
Truc Vert
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography
0105 earth and related environmental sciences
General Environmental Science
Shore
Sandy beach
geography.geographical_feature_category
Física [Àrees temàtiques de la UPC]
Buoy
1. No poverty
[SHS.GEO]Humanities and Social Sciences/Geography
Climatic changes
Index
Geography
Oceanography
Costes -- Aspectes ambientals
13. Climate action
Submarine pipeline
France
Channel (geography)
Canvis climàtics
Subjects
Details
- Language :
- English
- ISSN :
- 0936577X and 16161572
- Database :
- OpenAIRE
- Journal :
- Climate Research, Climate Research, 2013, 57 (1), pp.19-44. ⟨10.3354/cr01153⟩, Climate Research, Inter Research, 2013, 57 (1), pp.19-44. ⟨10.3354/cr01153⟩, Recercat. Dipósit de la Recerca de Catalunya, instname, UPCommons. Portal del coneixement obert de la UPC, Universitat Politècnica de Catalunya (UPC)
- Accession number :
- edsair.doi.dedup.....64cd43af58cf1c68c0e57204e7fe8aa4