Geochemical and hydrological controls on carbon sequestration, and methane production in aquatic systems

在湿地、湖泊和水库中，生物质在缺乏氧气的情况下分解，因为大气提供氧气的速度很慢。形成一种环境，阻止大量碳和营养物质循环进入大气和地表水，并产生甲烷，这是一种强有力的温室气体。与气候有关的水和能源运输的变化改变了这些过程的速度。这项研究考察了这些环境中生物质分解的化学和物理控制机制。这些被用来分析土壤和沉积物在稳定气候和加拿大淡水资源营养状况方面的关键作用如何受到气候变化的影响。

In wetlands, lakes, and reservoirs biomass decomposes in absence of oxygen, whose provision from the atmosphere is slow. An environment develops that withholds large amounts of carbon and nutrients from recycling to the atmosphere and surface waters and produces methane, a potent greenhouse gas. Changes in climate-related transport of water and energy alter the rates of these processes. The research examines chemical and physical control mechanisms on decomposition of biomass in these environments. These are used to analyze how the critical role of soils and sediments in stabilization of climate and nutrient status of Canada freshwater resources are impacted by climate change.