An Integrated Display and Analysis Methodology for Multivariable Radar Data

Dolan, Brenda; Rutledge, Steven A.

doi:10.1175/jam2524.1

Cited by 14 publications

(10 citation statements)

References 46 publications

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“…CSU‐Pawnee was an S‐band Doppler radar situated 47.7 km NW of CSU‐CHILL. Together, they formed a dual‐Doppler network that has been frequently used to study combined kinematic and microphysical characteristics of storms [e.g., Lang and Rutledge , ; Dolan and Rutledge , ; Basarab et al ., ]. Additional coverage was provided by U.S. National Weather Service Doppler radars near Denver, Colorado (KFTG), and Cheyenne, Wyoming (KCYS).…”

Section: Methodsmentioning

confidence: 99%

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Observations of two sprite‐producing storms in Colorado

et al. 2016

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Two sprite‐producing thunderstorms were observed on 8 and 25 June 2012 in northeastern Colorado by a combination of low‐light cameras, a lightning mapping array, polarimetric and Doppler radars, the National Lightning Detection Network, and charge moment change measurements. The 8 June event evolved from a tornadic hailstorm to a larger multicellular system that produced 21 observed positive sprites in 2 h. The majority of sprites occurred during a lull in convective strength, as measured by total flash rate, flash energy, and radar echo volume. Mean flash area spiked multiple times during this period; however, total flash rates still exceeded 60 min−1, and portions of the storm featured a complex anomalous charge structure, with midlevel positive charge near −20°C. The storm produced predominantly positive cloud‐to‐ground lightning. All sprite‐parent flashes occurred on the northeastern flank of the storm, where strong westerly upper level flow was consistent with advection of charged precipitation away from convection, providing a pathway for stratiform lightning. The 25 June event was another multicellular hailstorm with an anomalous charge structure that produced 26 positive sprites in less than 1 h. The sprites again occurred during a convective lull, with relatively weaker reflectivity and lower total flash rate but relatively larger mean flash area. However, all sprite parents occurred in or near convection and tapped charge layers in adjacent anvil cloud. The results demonstrate the sprite production by convective ground strokes in anomalously charged storms and also indicate that sprite production and convective vigor are inversely related in mature storms.

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Section: Methodsmentioning

confidence: 99%

“…Additional coverage was provided by U.S. National Weather Service Doppler radars near Denver, Colorado (KFTG), and Cheyenne, Wyoming (KCYS). These S‐band Doppler radars can often contribute to multi‐Doppler syntheses because of their close proximity to CSU‐CHILL and CSU‐Pawnee [ Dolan and Rutledge , ].…”

Section: Methodsmentioning

confidence: 99%

Observations of two sprite‐producing storms in Colorado

et al. 2016

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“…Zhang et al , 2005; Gao, 2009); unfolding algorithms specifically designed for operational purposes have been developed (e.g. Zhang and Wang, 2006; He et al , 2012) and multiple pulse repetition time (PRT) Doppler schemes, which allow extending the Nyquist velocity significantly, are implemented on operational radar systems (Torres et al , 2004; Tabary et al , 2005, 2006); computationally effective multiple‐Doppler wind retrieval algorithms have been proposed and tested in operational frameworks (Dolan and Rutledge, 2007; Bousquet et al , 2008a); and last but not least, gap‐filling radars have started to be deployed within operational networks to mitigate gaps in radar coverage and increase the ability to study and forecast localized high‐risk precipitation events (McLaughlin et al , 2009; Rude et al , 2012; Westrelin et al , 2012).…”

Section: Introductionmentioning

confidence: 99%

One‐Pot Synthesis of Cobalt‐Incorporated Nitrogen‐Doped Reduced Graphene Oxide as an Oxygen Reduction Reaction Catalyst in Alkaline Medium

Kottakkat

Bron

2014

ChemElectroChem

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Cobalt‐incorporated nitrogen‐doped reduced graphene oxide (Co/NrGO) as a catalyst for the oxygen reduction reaction is prepared in a single step by thermal reduction of graphene oxide to reduced graphene oxide (rGO) in the presence of a cobalt salt and 1,10‐phenanthroline as a nitrogen precursor. Cobalt is identified as cobalt oxide (CoO) in the hybrid. Both the cobalt and nitrogen contents in Co/NrGO are higher than those in cobalt‐ or nitrogen‐free samples; this indicates that cobalt and 1,10‐phenathroline mutually enhance incorporation into the material. An almost four‐electron transfer is observed as the average per oxygen molecule, and Co/NrGO demonstrates highly improved activity in comparison with NrGO and rGO. CoO and nitrogen‐doped moieties may be acting as active centers for oxygen reduction individually or synergistically. With a loading of less than 2 wt % cobalt in Co/NrGO, appreciable activity is already observed. Moreover, the high selectivity for oxygen reduction over methanol oxidation for Co/NrGO is demonstrated, making this hybrid a promising catalyst for direct methanol alkaline fuel cells.

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“…The 3D wind and reflectivity fields reconstructed in this framework were proven quite useful to guide research aircraft in the field, understand the dynamics of the sampled atmospheric systems, or verify numerical model simulations (e.g., Rotunno and Ferretti 2003). More recently, Dolan and Rutledge (2007) also proposed a method to produce real-time dual-Doppler winds as part of a new software suite aiming to assist scientists and forecasters in real-time interpretation and analysis of radar data. The method, which was tested during the summers of 2004 and 2005, was developed for a network of four Doppler radars [two operational Weather Surveillance Radar-1988 Doppler (WSR-88D) and Colorado State University's (CSU) University of Chicago-Illinois State Water Survey (CHILL) and Pawnee research radars].…”

Section: Introductionmentioning

confidence: 99%

Operational Multiple-Doppler Wind Retrieval Inferred from Long-Range Radial Velocity Measurements

Bousquet¹,

Tabary

Châtelet

2008

Journal of Applied Meteorology and Climatology

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International audienceThe recent deployment of an innovative triple pulse rise time (PRT) scheme within the French operational radar network allows for the simultaneous collection of reflectivity and radial velocity measurements up to a range of 250 km with no ambiguity. This achievement brings new perspectives in terms of operational exploitation of Doppler measurements including the capability to consistently perform multiple- Doppler wind synthesis in a fully operational framework. Using real and simulated Doppler observations, the authors show that the 3D wind fields retrieved in that framework can definitely be relied upon to achieve a consistent and detailed mapping of the airflow structure in various precipitation regimes despite radar baselines averaging _180 km and very limited scanning strategies. This achievement could be easily transposed to other operational networks and represents a remarkable opportunity to add further value to operational Doppler velocity measurements

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An Integrated Display and Analysis Methodology for Multivariable Radar Data

Cited by 14 publications

References 46 publications

Observations of two sprite‐producing storms in Colorado

Observations of two sprite‐producing storms in Colorado

One‐Pot Synthesis of Cobalt‐Incorporated Nitrogen‐Doped Reduced Graphene Oxide as an Oxygen Reduction Reaction Catalyst in Alkaline Medium

Operational Multiple-Doppler Wind Retrieval Inferred from Long-Range Radial Velocity Measurements

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