Description du projet
Caractériser la libération d’oxyde nitreux dans l’atmosphère liée à l’hypoxie côtière
L’hypoxie saisonnière dans les eaux en raison de l’activité humaine crée des zones mortes au cours des mois d’été. Ce phénomène, aggravé par le réchauffement planétaire, affecte non seulement la vie marine, mais stimule également les émissions d’oxyde nitreux (N2O), qui contribuent au réchauffement et appauvrissent la couche d’ozone. Grâce au soutien du programme Actions Marie Skłodowska-Curie, le projet DYNOX examinera le rôle de l’hypoxie saisonnière dans l’échange de N2O aux interfaces sédiments-eau-air. Un paradigme d’observation innovant facilitera l’analyse sans précédent des flux de N2O, leur variabilité naturelle liée à l’hypoxie saisonnière et les changements potentiels avec une augmentation du réchauffement et de la désoxygénation des océans, et des réactions microbiennes. Les résultats aideront les autorités locales à définir les sites prioritaires devant faire l’objet d’une surveillance environnementale.
Objectif
The DYNOX project will elucidate the role of seasonal hypoxia as a driving mechanism for the exchange of the potent greenhouse gas (GHG) nitrous oxide (N2O) across the sediment-water-air interfaces in anthropogenically impacted coastal regions. To this end, the applicants propose to employ a comprehensive and innovative observational approach in Lake Grevelingen (Netherlands), which is a saline coastal reservoir that experiences seasonal hypoxia as a result of limited water exchange after two dams were built in the 60s-70s. The measurement strategy will consist of novel shipboard measurements, laboratory-based incubation experiments and analysis of archived samples. This comprehensive approach will allow an unprecedented analysis of the fluxes of N2O from a shallow coastal ecosystem, their natural variability in response to the onset of seasonal hypoxia as well as potential changes with further ocean warming and deoxygenation, and the underlying microbial responses. DYNOX will not only close gaps in data and fundamental understanding in the field of Earth and Environmental Sciences, but will also provide valuable data to the Essential Ocean Variables Framework of the Global Ocean Observing System, and serve as a scientific basis for issuing recommendations to local authorities on priority locations for cost-effective environmental monitoring. Hence, the project will contribute to the research and innovation framework programme “Horizon Europe”, within the mission area “Healthy oceans, seas, coastal and inland waters”, as well as to the UN Sustainable Development Goals (SDG) by addressing SDG 13 “Climate Action” and SDG 14 “Life Below Water”. The project will be carried out during a fellowship at the Department of Earth Sciences at Utrecht University under the supervision of Professor Caroline Slomp, and is expected to promote substantial progress in the scientific career of Dr. Arévalo-Martínez, who aims to establish himself as an independent research group leader.
Champ scientifique
Programme(s)
- HORIZON.1.2 - Marie Skłodowska-Curie Actions (MSCA) Main Programme
Régime de financement
HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European FellowshipsCoordinateur
6525 XZ Nijmegen
Pays-Bas