منابع مشابه
A Multiyear Dust Devil Vortex Survey Using an Automated Search of Pressure Time Series
Dust devils occur in arid climates on the Earth and ubiquitously on Mars, where they likely dominate the supply of atmospheric dust and influence climate. Martian dust devils have been studied with a combination of orbiting and landed spacecraft, while most studies of terrestrial dust devils have involved manned monitoring of field sites, which can be costly both in time and personnel. As an al...
متن کاملA simple electrodynamic model of a dust devil
[1] We present an electrodynamic model of a dust devil applying a similar methodology as performed previously for charging in terrestrial thunderstorms. While thunderstorm processes focus on inductive charging between large graupel and smaller ice and water droplets, we tailor the model to focus on the electric charge transfer between dust grains of different sizes and compositions. We specific...
متن کاملA Close Encounter with a Terrestrial Dust Devil
Introduction: During August 03 a dust devil field investigation campaign was conducted in the El Dorado Valley, Nevada. This field site has been well characterised previously [9], and has a well documented record of dust devil events. We report on one particular encounter from this field campaign, whereby a dust devil was sampled by a large number of sensors. These measurements consist of wind ...
متن کاملIntegration of electrostatic and fluid dynamics within a dust devil
[1] In this study we derive an analytical expression to describe the electrostatic field in a dust cloud with grain trajectories defined by fluid dynamics and grain charging via contact electrification. In order to solve for the electric field, we merge the fluid dynamic–driven grain motion directly into the basic electrostatic formalism to end up with an electric field dependent on meteorologi...
متن کاملIrregular dust devil pressure drops on Earth and Mars: Effect of cycloidal tracks
In a survey of dust devil activity at a desert playa using continuous monitoring by a pressure logger, we have detected a number of pressure drops with complex structures: simple and symmetric drops make up only 25–30% of the total. In contrast to the simple, symmetric single-dip profiles expected for singlecell vertical vortices gliding past the pressure sensor, many profiles have an asymmetri...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Monthly Weather Review
سال: 1954
ISSN: 0027-0644,1520-0493
DOI: 10.1175/1520-0493(1954)082<0007:pdiadd>2.0.co;2