The role of river discharge, wind and tide on the extension and variability of the Tagus River plume was analyzed from 2003 to 2015. This study was performed combining daily images obtained from the Moderate Resolution Imaging Spectroradiometer (MODIS) sensor located onboard the Aqua and Terra satellites. Composites were generated by averaging pixels with the same forcing conditions. River disc...

Photoclinometry, a shape-from-shading technique, is applied to satellite data to determine the three-dimensional height and morphology of the upper optical surface of a plume from the eruption of Redoubt Volcano, Alaska. The technique can be applied to visible images of volcanic plumes that have uniform scattering properties and is most effective on images with moderate incident Sun angles and ...

A frequency-averaged quasilinear model is derived and experimentally validated for the evolution of ion acoustic turbulence (IAT) along the centerline of a 100-A class, LaB_{6} hollow cathode. Probe-based diagnostics and a laser induced fluorescence system are employed to measure the properties of both the turbulence and the background plasma parameters as they vary spatially in the cathode plu...

The mantle plume underlying the Hawaiian Swell has been modelled numerically using a stationary steady axisymmetric plume under a solid conducting lid. A method of calculating the rate of melt production from the plume has been developed, and the total melt production rate, the residual depth anomaly and the geoid anomaly have been used to constrain the model. The plume has a central potential ...

The moth-inspired plume-tracing strategies on a single REMUS underwater vehicle successfully tracked a Rhodamine dye plume over 100 m and declared its source location in near-shore ocean environments that are characterized by turbulence, tides, and waves. This paper expands moth-inspired plume tracing via a single vehicle to multiple vehicles. The new strategy includes a mechanism determining a...

Introduction: The Cassini spacecraft detected a gas plume emanating from Saturn’s icy satellite Enceladus [13]. Its composition (91% H2O, 3.2% CO2, 4% N2, and 1.6% CH4) was inferred based on measurements by the Ion and Neutral Mass Spectrometer [2]. Jets from warm (110-160 K) fissures (“sulci”) supply the plume [3], and boiling water in a subsurface reservoir may power the jets [1]. Liquid wate...

[1] High‐resolution numerical simulations of the northern Gulf of Mexico region using the Hybrid Coordinate Ocean Model (HYCOM) were employed to investigate the dynamical processes controlling the fate of the Mississippi River plume, in particular the conditions that favor cross‐marginal transport. The study focuses on the effects of topography, wind‐driven and eddy‐driven circulation on the of...

[1] The impact of a reflective, recurrent coastal resuspension plume on the lower trophic food web system in Lake Michigan was examined using a 3-D coupled physical and biological model. Numerical experiments were conducted for the March 1998 and 1999 plume events. The comparison between modeling results of these 2 years shows that the spatial distributions of the biological fields (i.e., phosp...

Multiscale computational approach that combines different methods to study laser ablation phenomenon is presented. The methods include the molecular dynamics (MD) breathing sphere model for simulation of the initial stage of laser ablation, a combined MD finite element method (FEM) approach for simulation of propagation of the laser-induced pressure waves out from the MD computational cell, and...

We have simulated the dynamical evolution of the plume from a prescribed biomass fire, using the active tracer high-resolution atmospheric model (ATHAM). Initialization parameters were set to reflect the conditions during the fire. The model results are compared with airborne remote sensing and in situ measurements of the plume. ATHAM reproduces the injection height (250 m to 600 m) and the hor...