Overview of the Thermal Infrared EXplorer (TIREX) mission
Résumé
Increasing anthropogenic pressure and climatic change tightly interact and generate severe environmental impacts. Among them, those on water cycle, biogeochemical cycles, and vegetation development are critical, since they induce a number of feedback effects on human activities and climate. The processes are primarily governed by water and energy budgets, where Surface Temperature is a key signature. New spaceborne Surface Temperature observational techniques that provide both (i) high revisit capabilities and (ii) high spatial resolution will drive significant improvements in the modelling and monitoring of the vegetation/climate system, and in practical applications such as agriculture and water management.The proposed Thermal InfraRed EXplorer (TIREX) mission aims to fill this gap by combining a high spatial resolution (around 50 m) with a high revisit capability (1 day) in the TIRThe first priority of the TIREX mission lies in the monitoring of the biogeochemical cycles (water and CO2 particularly) of the continental biosphere (natural and agricultural). Practical applications deal with agriculture and forestry (water stress detection, irrigation management, yield prediction, growth monitoring, droughts and fire risks…), with hydrology (water resources management at the catchment scale, dynamics of blue and green water) and with climate change (carbon monitoring). Improvement in methodologies and related tools (model validations, assimilation design, aggregation schemes) are also expected. A second mission objective focuses on the urban environments, in response toimportant societal demands, with applications such as urban heat islands and urban microclimates, impact of heat waves, energy consumption, atmospheric boundary layer dynamics and diffusion of pollutants. A third mission objective deals with applications in coastal and water continental areas, key regions to monitor anthropic effects on climate change, pollutants, halieutic resources, etc.The TIREX mission has a clear "Explorer" nature, as it represents a fully innovative way of addressing the monitoring of surface energy and mass fluxes at global scale from Surface Temerature data, by providing new spaceborne information at the proposed spatial and temporal resolutions.
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