Climate change in Vietnam challenge, risks and scientific investigations Emilie STRADY Chargée de recherche IRD Paroles Volon terre. Valoriser les engagements pour le développement durable du Vietnam. Journée du Volontariat français au Vietnam. Samedi 21 novembre 2015
What is controlling climate on Earth? Energy budget is crucial for the hydrological cycle -Drought -Frequency of heavy rains and typhoons -Upwelling
What is perturbing climate on Earth?
Past CO 2 methane and temperature on Earth Vostok ice core Adapted from Petit et al. 1999
Past CO 2 methane and temperature on Earth Vostok ice core Adapted from Petit et al. 1999 https://scripps.ucsd.edu/programs/keelingcurve/
Temperature 1950-2000 Rainfall 1950-2000 Increase of 0.5-0.7 0 C over 50 years IMHEN 2009
Sea Level Rise 1975-2000 20cm rise over 25 years IMHEN 2009
Predicted T and rainfall change over 2100 Impacts on Agriculture land-use? Flooding? Tropical cyclones occurrence? Source: Le Monde.fr novembre 2013
Sea Level Rise 1m Impacts on Coastal erosion? Flooding? Salt water intrusion? World Bank 2007 Chinowsky et al. 2015 Regional Studies
sea level rise 11.5cm to 68 cm over the next 50 years a speed of 0.5-0.6 cm per year SLR 0.65m Inundation: 5130km² (13%)
SLR 1.00m Inundation: 473km² (23%) If SLR 0.65m Inundation: 128km² (6%)
Achieve and provide robust dataset based on monitoring, satellite observatory, etc Built-up robust model to improve the prediction Improve our knowledge on the functionning of the ecosystems and on their interactions Anticipate the rising environmental issues to understand, predict and prevent Pass on knowledge Many Vietnamese and International Research Project focus on climate change in Southern Vietnam, especially in the Mekong Delta
Centre Asiatique de Recherche sur l Eau CARE aims to contribute to the sound and sustainable management of water resources in the Mekong Delta region in a context of unprecedented challenges related to climate change and anthropogenic pressure Research Areas and Teams: Sediment and pollutants transfert in aquatic systems Water quality and its health impact Hydrology hazard and vulnerability Urban hydrology Integrated water management
Coastal and River bank erosion Saline water intrusion
Coastal and River bank erosion Saline water intrusion
Coastal and River bank erosion Saline water intrusion Consequences on pollutant transfer
Coastal and River bank erosion Saline water intrusion Consequences on pollutant transfer Toxicity of pollutants depends on their speciation (how they are ) speciation is controlled by salinity, ph, O 2 levels of water Salinity change or sediments inputs from erosion may induced a change of speciation of pollutants and so their toxicity Field measurements: actual pollutant speciation & transfert Laboratory experiments: salinity, ph, O2 level change Modelling
Nguyen Phuoc Dan Merci pour votre attention Pour aller plus loin Nguyen Phuoc Dan http://www.ipcc.ch/report/ar5/syr/ http://www.unep.org/climatechange/adaptation/scienceandassessments