Trawling-induced sediment resuspension reduces CO2 uptake
Peer-Reviewed Publication
Updates every hour. Last Updated: 6-Jul-2025 07:10 ET (6-Jul-2025 11:10 GMT/UTC)
24 April 2025/Kiel. When bottom trawls are dragged across the seafloor, they stir up sediments. This not only releases previously stored organic carbon, but also intensifies the oxidation of pyrite, a mineral present in marine sediments, leading to additional emissions of carbon dioxide (CO2). These are the findings of a new study conducted by the GEOMAR Helmholtz Centre for Ocean Research Kiel. Based on sediment samples from Kiel Bight, the researchers investigated the geochemical consequences of sediment resuspension. Their conclusion: areas with fine-grained sediments, which play a crucial role in CO2 storage in the Baltic Sea, should urgently be placed under protection. The study has now been published in the journal Communications Earth & Environment.
Amid warnings of near record heat ahead in 2025, the Canadian Partnership for Children’s Health and Environment (CPCHE) and the Canadian Environmental Law Association (CELA) say Canada’s schools and child care facilities are ill-prepared and children are paying the price. CPCHE’s summary of evidence and Collective Call for Action, signed by 40+ partners and collaborators, is complemented by twin CELA reports elaborating on the need for climate-resilient infrastructure.
A study by Dartmouth researchers lays out a scientific framework for holding individual fossil fuel companies liable for the costs of climate change by tracing specific damages back to their emissions. The researchers use the tool to provide the first causal estimate of economic losses due to extreme heat driven by emissions. They report that carbon dioxide and methane output from just 111 companies cost the world economy $28 trillion from 1991 to 2020, with the five top-emitting firms linked to $9 trillion of those losses.
Against the backdrop of accelerating global climate change and urbanization processes, urban transportation systems are confronting increasingly complex multi-hazard risks. Spatiotemporal big data, characterized by its high precision and information density, has demonstrated growing significance in transportation system resilience studies. Nevertheless, the current comprehension of the evolutionary trajectory of spatiotemporal big data applications in this domain remains fragmented. In this context, our study conducts a systematic review of global research, elucidating the practical implementations of spatiotemporal big data in transportation system resilience studies. The investigation reveals that multi-source big data with high spatiotemporal resolution has not only catalyzed methodological innovations in resilience assessment but has also potential to facilitate a paradigm shift in the field - transitioning from macro-scale to micro-scale analyses, from static evaluations to dynamic monitoring approaches, and from post-disaster emphasis to comprehensive lifecycle investigations. Journal of Geo-Information Science has published the study's results.