Injection of carbon dioxide into geological formations for long-term storage is widely regarded as a promising tool for reducing global atmospheric CO2 emissions. Given the environmental and health risks associated with leakage of CO2 from such a storage site, it is critical to ensure that injected CO2 remain trapped underground for the foreseeable future. Careful site selection and effective i...

[1] We investigate rapid around-the-world transport of a smoke aerosol plume released by intense forest fires in southeastern Australia in December 2006. During the first half of December 2006, southeastern Australia suffered from severe drought and exceptionally high temperatures. On 14 December 2006, a passing cold front in combination with the intense heat from the fires causing pyro-convect...

Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. The large-scale injection of carbon dioxide (CO 2) into saline aquifers is a promising tool for reducing atmospheri...

Recent years have seen considerable interest in sensor networks. In this paper we study networks of chemical or similar sensors detecting a plume of contaminant, such as that in Figure (i), although our analysis also applies to sensors of other kinds. In order to optimise power consumption, we assume that sensors are normally quiescent, but can “wake” each other if contaminant is detected. Cons...

Exhausts from rockets influence the atmospheric chemistry and the atmospheric radiative transfer. Assessing these effects requires a multidisciplinary approach. It ranges from combustion calculations in the rocket engines to plume simulations on different scales. The plume is first analysed with computational fluid dynamic models and engineering methods. Then a diffusion model is applied and la...

A validation study has been conducted for a turbulence model used to close the temporally filtered Navier Stokes (TFNS) equations. A turbulence model was purposely built to support fire simulations under the Accelerated Strategic Computing (ASC) program. The model was developed so that fire transients could be simulated and it has been implemented in SIERRA/Fuego. The model is validated using h...