Analyse et gestion du changement climatique et de ses effets sur l’eau : projets de recherche allemands

The document details various German-led research initiatives focused on the intersection of climate change and water. It covers regional climate modeling for Germany, the impact of extreme weather on biogeochemical cycles, global water scarcity, and specific case studies such as the GLOWA projects in the Elbe and Jordan River basins. Additionally, it discusses aquatic ecosystem vulnerabilities through the AQUASHIFT program and proposes a risk-management approach for coastal flood protection in Hamburg.

• Climate projections for Germany suggest a mean warming of between 2.5°C and 3.5°C by 2100, with the strongest winter warming expected in the South and South-East, potentially exceeding 4°C compared to 1961–1990.
• Summer precipitation in Germany is projected to decrease on a large scale by 2100, with reductions of up to 30% specifically in the North-East, South, and South-West.
• The 2003 European heatwave caused a roughly 30% decrease in vegetation growth, turning ecosystems into an abnormal carbon source of 0.5 petagrams (Pg) of C, which neutralized 4 to 5 years of normal carbon sink function.
• Global water stress is projected to affect 60% to 75% of the Earth's surface by 2050, with the 21st century described as the "era of water scarcity" due to population growth and climate variability.
• In the Elbe river basin, climate scenarios indicate that while annual precipitation changes are moderate, increased summer evaporation and reduced rainfall lead to lower water flows in spring and late summer compared to the 1961-90 reference period.
• The GLOWA Jordan River project emphasizes that large-scale technical projects like desalination are costly and inflexible; instead, it advocates for integrated approaches including 'green water' (soil water) management and wastewater reuse.
• The AQUASHIFT program identifies a 'Match-Mismatch' risk where warming causes biological events, such as the hatching of copepod larvae, to occur before the spring phytoplankton bloom, potentially disrupting the entire aquatic food chain.
• For coastal protection in Hamburg-Wilhelmsburg, researchers propose a 'cascade filling chamber' system of internal dikes to manage flood risks rather than simply raising primary dikes, potentially reducing damages by two-thirds.

APA

Stockholm Environment Institute (2008). Analyse et gestion du changement climatique et de ses effets sur l’eau : projets de recherche allemands. https://www.sei.org/mediamanager/documents/Publications/Water-sanitation/hoff-adaptation-la-penurie-deau-croissante.pdf

Chicago

Stockholm Environment Institute. Analyse et gestion du changement climatique et de ses effets sur l’eau : projets de recherche allemands. 2008. https://www.sei.org/mediamanager/documents/Publications/Water-sanitation/hoff-adaptation-la-penurie-deau-croissante.pdf.

Wikipedia

{{cite report |author=Stockholm Environment Institute |title=Analyse et gestion du changement climatique et de ses effets sur l’eau : projets de recherche allemands |date=October 2008 |url=https://www.sei.org/mediamanager/documents/Publications/Water-sanitation/hoff-adaptation-la-penurie-deau-croissante.pdf |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{stockholmenvironmentinstitute2008analyse, author = {{Stockholm Environment Institute}}, title = {{Analyse et gestion du changement climatique et de ses effets sur l’eau : projets de recherche allemands}}, institution = {Stockholm Environment Institute}, year = {2008}, month = oct, url = {https://www.sei.org/mediamanager/documents/Publications/Water-sanitation/hoff-adaptation-la-penurie-deau-croissante.pdf}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }