Results from a realistic simulation of 3D radiative magneto-convection in a strong background magnetic field corresponding to the conditions in sunspot umbrae are shown. The convective energy transport is dominated by narrow upflow plumes with adjacent downflows, which become almost field-free near the surface layers. The strong external magnetic field forces the plumes to assume a cusp-like sh...

a ra gua) Erup tion on 28 July 2005 de pos its ash in nearby towns . . . . . . . . . . . . . . . . 2 Miyake-jima (Ja pan) SO2 flux con tin ues grad ual de cline; mi nor erup tions in No vem ber-De cem ber 2004 . . . 2 Kikai (Ja pan) Small erup tions dur ing March-Sep tem ber 2004 pro duce ash plumes . . . . . . . . . . . . . . . 4 Suwanose-jima (Ja pan) Erup tions dur ing April 2004-July 2005 s...

Tritonia diomedea (synonymous with Tritonia tetraquetra) navigates in turbulent odour plumes, crawling upstream towards prey and downstream to avoid predators. This is probably accomplished by odour-gated rheotaxis, but other possibilities have not been excluded. Our goal was to test whether T. diomedea uses odour-gated rheotaxis and to simultaneously determine which of the cephalic sensory org...

Groundwater table rising (GTR) represents a well-known issue that affects several urban and agricultural areas of the world. This work addresses link between GTR formation solute plumes from contaminant sources are located in vadose zone, water may help mobilize with time. A case study is analyzed stratified pyroclastic-alluvial aquifer near Naples (Italy), which notoriously affected by GTR. di...

[1] During the dry season, anthropogenic fires in tropical forests and peatlands of equatorial Asia produce regionally expansive smoke clouds that have important effects on atmospheric radiation and air quality. Here we estimated the height of smoke on Borneo and Sumatra and characterized its sensitivity to El Niño and regional drought. We used Multiangle Imaging Spectroradiometer (MISR) satell...

In riverbank filtration, contaminant transport is affected by colloidal particles such as dissolved organic matter (DOM) and bacterial particles. In addition, the subsurface heterogeneity influences the behavior of contaminant transport in riverbank filtration. A mathematical model is developed to describe the contaminant transport in dual-porosity media in the presence of DOM and bacteria as m...

Low-permeability aquitards can significantly affect the transport, distribution, and persistence of contaminant plumes in subsurface systems. Although such low-permeability materials are often charged, key role charge-induced electrostatic processes during transport has not been extensively studied. This work presents a detailed investigation exploring coupled effects heterogeneous distribution...