Search results for "ELT"

On the Co-Occurrence of Warm Conveyor Belt Outflows and PV Streamers

2014

Abstract The co-occurrence of warm conveyor belts (WCBs), strongly ascending moist airstreams in extratropical cyclones, and stratospheric potential vorticity (PV) streamers, indicators for breaking Rossby waves on the tropopause, is investigated for a 21-yr period in the Northern Hemisphere using Interim European Centre for Medium-Range Weather Forecasts (ECMWF) Re-Analysis (ERA-Interim) data. WCB outflows and PV streamers are respectively identified as two- and three-dimensional objects and tracked during their life cycle. PV streamers are more frequent than WCB outflows and nearly 15% of all PV streamers co-occur with WCBs during their life cycle, whereas about 60% of all WCB outflows co…

Survival of Snow in the Melting Layer: Relative Humidity Influence

2021

AbstractThis study quantifies how far snow can fall into the melting layer (ML) before all snow has melted by examining a combination of in-situ observations from aircraft measurements in Lagrangian spiral descents from above through the ML and descents and ascents into the ML, as well as an extensive database of NOAA surface observer reports during the past 50 years. The airborne data contain information on the particle phase (solid, mixed, or liquid), population size distributions and shapes, along with temperature, relative humidity, and vertical velocity. A wide range of temperatures and ambient relative humidities are used for both the airborne and ground-based data. It is shown that a…

Variation of H2O/CO2and CO2/SO2ratios of volcanic gases discharged by continuous degassing of Mount Etna volcano, Italy

2008

[1] We applied the Multi-GAS technique to measure compositions of the volcanic plumes continuously discharged from summit craters of Voragine, Northeast and Bocca Nuova at Mount Etna, in an attempt to estimate compositions of the source volcanic gases. The estimated CO2/SO2 and H2O/CO2 ratios of the volcanic gases show a large variation ranging from 0.6 to 30 and from 1 to 18, respectively. This variability overlaps with the compositional range of dissolved volatiles in melt inclusions and their coexisting bubbles in a magma chamber and can be caused by the low-pressure degassing of a magma with variable bubble content ranging from 0.3 to 15 wt.%. The variable bubble content in the magma is…

Competition of coagulation sink and source rate: New particle formation in the Pearl River Delta of China

2010

The coagulation sink and its role in new particle formation are investigated based on data obtained during the PRIDE-PRD2004 campaign at Xinken of Pearl River Delta, China. Analysis of size distributions and mode contributions of the coagulation sink show that the observed higher load of accumulation mode particles impose a significant effect on the coagulation sink and result in higher coagulation sinks at Xinken despite of the lower total particle number compared with other areas. Hence it is concluded that the higher coagulation sink may depress the occurrence frequency of new particle formation events. The strategies targeting at controlling accumulation mode particles may have influenc…

Instability of cuboctahedral copper clusters.

1992

Equilibrium structures of copper clusters up to 10 000 atoms are studied using molecular-dynamics and effective-medium theory. Icosahedral closed-shell clusters are most stable up to \ensuremath{\sim}2500 atoms and the Wulff polyhedra are favored for larger clusters. Cuboctahedral closed-shell clusters up to \ensuremath{\sim}2000 atoms are unstable. They undergo a nondiffusive transition to an icosahedral structure at low temperatures and melt directly above the fcc-cluster-melting temperature. The melting temperature decreases with decreasing cluster size but not as deeply as has been reported for pure metals.

Comorbilidad de TEA y TDAH: revisión sistemática de los avances en investigación

2016

La reciente publicación del DSM-5, introduce la novedad de aceptar la posibilidad de un diagnóstico comórbido de los Trastorno de Espectro Autista (TEA) y el Trastorno por Déficit de Aten- ción/Hiperactividad (TDAH). En este artículo se realiza una revisión de trabajos que han estudiado esta comorbilidad. Se revisaron un total de 28 investigaciones, estableciendo 4 temáticas diferentes. La investigación muestra tasas variables de comorbili- dad de TEA y TDAH dependiendo de la edad y procedencia de las mues- tras, y de los criterios diagnósticos empleados. Cuando se da la comorbili- dad de TEA y TDAH aumenta la severidad de la sintomatología autista y de trastornos externalizantes e internal…

Linkages Between Gameplay Preferences and Fondness for Game Music

2021

In this paper we explore connections between players’ preferences in gameplay and their desire to listen to game music. Music always takes place in cultural contexts and the activity of music listening is likewise entangled with versatile cultural practices. This is arguably evident in the case of game music since the primary context of encountering it is the active and participatory experience of gameplay. By analyzing survey data (N = 403) collected from the UK, we investigate how contextual preferences in gameplay activities predict fondness for game music. It was found that player preference for Aggression and Exploration are two precedents for liking game music. These findings indicate…

L'essere supplito

2013

Promises of formal and informal musical activities in advancing neurocognitive development throughout childhood

2015

Adult musicians show superior neural sound discrimination when compared to nonmusicians. However, it is unclear whether these group differences reflect the effects of experience or preexisting neural enhancement in individuals who seek out musical training. Tracking how brain function matures over time in musically trained and nontrained children can shed light on this issue. Here, we review our recent longitudinal event-related potential (ERP) studies that examine how formal musical training and less formal musical activities influence the maturation of brain responses related to sound discrimination and auditory attention. These studies found that musically trained school-aged children an…

Immunomodulatory role of statins in autoimmune disease: is there a role for human gamma delta T cells ?

2006

Immunomodulatory role of statins in autoimmune disease: is there a role for human γδT cells?