Comparing ASCAT and CYGNSS Winds near Tropical Convection

Gradient Features identified in ASCAT (Advanced Scatterometer) data correspond well to observed CYGNSS (Cyclone Global Navigation Satellite System) wind shifts: Comparing ASCAT and CYGNSS winds near tropical convection. Gradient wind magnitude in ASCAT observations has been recently shown to be a useful proxy for the presence of tropical convection cold pools. To help confirm this in the vicinity of precipitation we perform a comparison with the L-band CYGNSS wind dataset. Integrated Multi-satellite Retrievals for GPM (Global Precipitation Measurement)) IMERG

Cuantificación del error en la orientación de la antena del radar meteorológico DWSR-2500C (Ezeiza) : verificación de los trabajos realizados

Fil: Vidal, Luciano. Servicio Meteorológico Nacional. Gerencia de Investigación, Desarrollo y Capacitación. Departamento de Investigación y Desarrollo; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias de la Atmósfera y Los Océanos; Argentina.Fil: Nesbitt, Steve. University of Illinois at Urbana-Champaign. Department of Atmospheric Sciences; Estados Unidos.La correcta orientación de la antena de un radar meteorológico es vital para el posicionamiento preciso de los ecos meteorológicos detectados por el radar. Errores en el posicionamiento de la misma fueron detectados en el radar meteorológico DWSR-2500C perteneciente al Servicio Meteorológico Nacional (ubicado próximo al Aeropuerto Internacional Ministro Pistarini) y fueron transmitidos el 18 de febrero de 2015 a los responsables de mantenimiento, la Empresa Mardet S.R.L. (ver Reporte Técnico SMN 2015-1). El objetivo del presente trabajo es verificar la efectividad de las correcciones realizadas por la Empresa. Se identificaron en la imagen radar ecos de terreno y se utilizó la herramienta Google Earth para obtener la posición geográfica de los mismos. Los resultados continuaron mostrando un corrimiento de 7,5°. La solución definitiva se logra el día 30 de abril de 2015 a partir de un trabajo coordinado entre personal de la Empresa, en el sitio radar, y meteorólogos del SMN. En vista de estos resultados, considerar que toda la información almacenada en el SMN del radar DWSR-2500C hasta este día presenta dicho error.A correct weather radar antenna orientation is important for an accurate positioning of the meteorological echoes detected by the radar. Errors in antenna orientation were found on the DWSR-2500C weather radar owned by the Servicio Meteorológico Nacional located nearby the Ministro Pistarini International Airport (see Reporte Técnico SMN 2015-1). On February 18 2015 this information was conveyed to Mardet S.R.L. responsible for the maintenance of the radar. The aim of this report is to verify the corrections made by the company. Radar echoes of the terrain were identified in the radar image and located with the use of the Google Earth tool. Results indicated that the drift of 7.5° was still present. The problem was solved on April 30 2015 after a coordinated work among personnel of the company and the SMN. In light of this, users of SMN´s DWSR-2500C data should take this issue into account for datasets prior to the mentioned date

Revision of Erpetosuchus (Archosauria: Pseudosuchia) and new erpetosuchid material from the Late Triassic ‘Elgin Reptile’ fauna based on µCT scanning techniques

The Late Triassic fauna of the Lossiemouth Sandstone Formation (LSF) from the Elgin area, Scotland, has been pivotal in expanding our understanding of Triassic terrestrial tetrapods. Frustratingly, due to their odd preservation, interpretations of the Elgin Triassic specimens have relied on destructive moulding techniques, which only provide incomplete, and potentially distorted, information. Here, we show that micro-computed tomography (μCT) could revitalise the study of this important assemblage. We describe a long-neglected specimen that was originally identified as a pseudosuchian archosaur, Ornithosuchus woodwardi. μCT scans revealed dozens of bones belonging to at least two taxa: a small-bodied pseudosuchian and a specimen of the procolophonid Leptopleuron lacertinum. The pseudosuchian skeleton possesses a combination of characters that are unique to the clade Erpetosuchidae. As a basis for investigating the phylogenetic relationships of this new specimen, we reviewed the anatomy, taxonomy and systematics of other erpetosuchid specimens from the LSF (all previously referred to Erpetosuchus). Unfortunately, due to the differing representation of the skeleton in the available Erpetosuchus specimens, we cannot determine whether the erpetosuchid specimen we describe here belongs to Erpetosuchus granti (to which we show it is closely related) or if it represents a distinct new taxon. Nevertheless, our results shed light on rarely preserved details of erpetosuchid anatomy. Finally, the unanticipated new information extracted from both previously studied and neglected specimens suggests that fossil remains may be much more widely distributed in the Elgin quarries than previously recognised, and that the richness of the LSF might have been underestimated

Legacy of Precipitation Feature Database from Satellite Passive Microwave Radiometer and Precipitation Radar Observations

No abstract availabl

Using Scatterometer-Measured Vector Winds to Study High-Impact Weather Events

No abstract availabl

Scleromochlus and the early evolution of Pterosauromorpha

Pterosaurs, the first vertebrates to evolve powered flight, were key components of Mesozoic terrestrial ecosystems from their sudden appearance in the Late Triassic until their demise at the end of the Cretaceous1,2,3,4,5,6. However, the origin and early evolution of pterosaurs are poorly understood owing to a substantial stratigraphic and morphological gap between these reptiles and their closest relatives6, Lagerpetidae7. Scleromochlus taylori, a tiny reptile from the early Late Triassic of Scotland discovered over a century ago, was hypothesized to be a key taxon closely related to pterosaurs8, but its poor preservation has limited previous studies and resulted in controversy over its phylogenetic position, with some even doubting its identification as an archosaur9. Here we use microcomputed tomographic scans to provide the first accurate whole-skeletal reconstruction and a revised diagnosis of Scleromochlus, revealing new anatomical details that conclusively identify it as a close pterosaur relative1 within Pterosauromorpha (the lagerpetid + pterosaur clade). Scleromochlus is anatomically more similar to lagerpetids than to pterosaurs and retains numerous features that were probably present in very early diverging members of Avemetatarsalia (bird-line archosaurs). These results support the hypothesis that the first flying reptiles evolved from tiny, probably facultatively bipedal, cursorial ancestors1

Examining Cold Pool Signatures of Oceanic Systems Using ASCAT Wind Retrievals of Varying Resolutions

No abstract availabl

2017 Research & Innovation Day Program

A one day showcase of applied research, social innovation, scholarship projects and activities.https://first.fanshawec.ca/cri_cripublications/1004/thumbnail.jp