Short-Lived Trace Gases in the Surface Ocean and the Atmosphere

The two-way exchange of trace gases between the ocean and the atmosphere is important for both the chemistry and physics of the atmosphere and the biogeochemistry of the oceans, including the global cycling of elements. Here we review these exchanges and their importance for a range of gases whose lifetimes are generally short compared to the main greenhouse gases and which are, in most cases, more reactive than them. Gases considered include sulphur and related compounds, organohalogens, non-methane hydrocarbons, ozone, ammonia and related compounds, hydrogen and carbon monoxide. Finally, we stress the interactivity of the system, the importance of process understanding for modeling, the need for more extensive field measurements and their better seasonal coverage, the importance of inter-calibration exercises and finally the need to show the importance of air-sea exchanges for global cycling and how the field fits into the broader context of Earth System Science

Towards effective military training in international humanitarian law

The obligation to train troops in international humanitarian law (IHL) is simply stated and its implementation delegated to State discretion. This reflects a past assumption that mere dissemination of IHL would be an effective contribution to the prevention of violations. Academic literature has evolved so that dissemination alone is now known to be insufficient for compliance, while the ICRC's integration model emphasizes the relevance of IHL to all aspects of military decision-making. A separate process, the ICRC/Government of Switzerland Initiative on Strengthening Compliance with IHL, is still in its consultative stages at the time of writing, but may result in voluntary State reporting and/or thematic discussions at meetings of States. This article synthesizes academic and practitioner insights on effective IHL training, and suggests a collaborative rubric for informative, standardized reporting on IHL training. Such a rubric could enable States and researchers to share best practice and future innovations on IHL training, using a streamlined, cost-effective tool