A multiscale segmentation algorithm has been developed to identify storms at different scales through contiguityenhanced K-Means clustering of texture features. The identified storms are used as a template for tracking storms through time and for identifying storm properties. A variety of scalar features are computed from the gridded values falling within the geographic and temporal extent of t...

the impacts of dust and sand storms (dss) on people, crops, livestock, infrastructure and health are well documented. data have accumulated on the deleterious effects of dust aerosols when they settle on plants. sand blasting of low growing plants is a common cause of failure in reforestation efforts. burial of plants by moving sands are also a cause of much damage. the physics of moving sand a...

the moisture flux convergence (mfc) and relative humidity in dusty days at different times and levels over the alvand mountain was investigated. the required basic data for the years 2009-2012, including relative humidity, visibility and synoptic codes, were gathered from hamadan synoptic station, while sea level pressure, uwind, vwind and specific humidity data were gathered from ncer/ncar sit...

This study describes and interprets the evolution of grain-size distribution of sediment yields generated in an experimental soil flume subjected to downstream and upstream moving rain storms. Results of laboratory experiments show that downstream moving storms cause more soil loss than do upstream moving storms. The pattern of sediment grain-size evolution in time during a runoff event exhibit...

Although urban wet weather discharges may have elevated concentrations of fecal indicator bacteria impacting water quality at swimming beaches, not all of these bacteria may arise from human sources. In this study, the contribution of non-human fecal indicator bacteria was quantified by sampling coastal reference beaches in southern California. Samples were collected at beaches near stormwater ...

[1] Interplanetary coronal mass ejections (ICMEs) are the primary cause of severe space weather at Earth because they drive shocks and trigger geomagnetic storms that can damage spacecraft and ground-based systems. The Solar Mass Ejection Imager (SMEI) is a U. S. Air Force experiment with the ability to track ICMEs in white light from near the Sun to Earth and beyond, thus providing an extended...

Patterns of dissolved organic carbon (DOC) and nitrogen (DON) delivery were compared between times of stormflow and baseflow in Paine Run, an Appalachian stream draining a 12.4 km2 forested catchment in the Shenandoah National Park (SNP), Virginia. The potential in-stream ecological impact of altered concentrations and/or chemical composition of DOM during storms also was examined, using standa...

Both the correlation methods and cell-identification methods currently used to identify and track individual storms in remotely sensed weather images have drawbacks. A hybrid method is introduced wherein we use a segmentation-based approach to identify storms in images and arrange the identified storms heirarchially. A genetic-algorithm method of matching these segmented regions across frames i...

disturbance was ice storms, which generally resulted in suppression of radial growth in pines and increased radial growth in oaks. Additionally, pulses of understory establishment coincided with major ice storms. The lack of understory disturbance such as fire may be allowing the establishment of shade tolerant understory species while limiting the establishment of pine and oak. Canopy disturba...

The effects of thunderstorms on the electromagnetic and muon components of the cosmic ray secondary flux were studied during severe storms obtained in 2004, analyzing the variations of the counting rates shown in the upper and lower scintillators of the muon telescope installed in Mexico City and considering the data of storms report for the international airport of Mexico City.