A5090863264- Lightning and Electromagnetic Phenomena
- Meteorological Phenomena and Simulations
- Fire effects on ecosystems
- Atmospheric aerosols and clouds
- Tropical and Extratropical Cyclones Research
- Precipitation Measurement and Analysis
- Climate variability and models
- Ocean Waves and Remote Sensing
- Ionosphere and magnetosphere dynamics
- Geophysics and Gravity Measurements
- Oceanographic and Atmospheric Processes
- Earthquake Detection and Analysis
- Soil Moisture and Remote Sensing
- Atmospheric chemistry and aerosols
- Plant Water Relations and Carbon Dynamics
- Atmospheric Ozone and Climate
- Scientific Computing and Data Management
- Distributed and Parallel Computing Systems
- High voltage insulation and dielectric phenomena
- Gamma-ray bursts and supernovae
- Geological and Geophysical Studies
- Plant responses to water stress
- Advanced Optical Sensing Technologies
- Astrophysics and Cosmic Phenomena
- Thermal Analysis in Power Transmission
Marshall Space Flight Center
2016-2025
International Space Station
2023
Norwich Research Park
2023
University of East Anglia
2023
University of Newcastle Australia
2021
National Aeronautics and Space Administration
2015-2018
University of Alabama in Huntsville
2017
University of North Dakota
2000-2017
Colorado State University
2004-2014
Financial Management Association International
2008
Abstract. Southern Africa produces almost a third of the Earth's biomass burning (BB) aerosol particles, yet fate these particles and their influence on regional global climate is poorly understood. ORACLES (ObseRvations Aerosols above CLouds intEractionS) 5-year NASA EVS-2 (Earth Venture Suborbital-2) investigation with three intensive observation periods designed to study key atmospheric processes that determine impacts aerosols. During Hemisphere winter spring (June–October), reaching 3–5...
A constellation of small, low-cost satellites is able to make scientifically valuable measurements the Earth which can be used for weather forecasting, disaster monitoring, and climate studies. Eight CYGNSS were launched into low orbit on December 15, 2016. Each satellite carries a science radar receiver measures GPS signals reflected from surface. The contain information about surface, including wind speed over ocean, soil moisture flooding land. are distributed around their plane so that...
Abstract The Deep Convective Clouds and Chemistry (DC3) field experiment produced an exceptional dataset on thunderstorms, including their dynamical, physical, electrical structures impact the chemical composition of troposphere. gathered detailed information inflow outflow regions midlatitude thunderstorms in northeast Colorado, west Texas to central Oklahoma, northern Alabama. A unique aspect DC3 strategy was locate sample convective a day after active convection order measure...
Abstract The Midlatitude Continental Convective Clouds Experiment (MC3E), a field program jointly led by the U.S. Department of Energy’s Atmospheric Radiation Measurement (ARM) Program and National Aeronautics Space Administration’s (NASA) Global Precipitation (GPM) mission, was conducted in south-central Oklahoma during April–May 2011. MC3E science objectives were motivated need to improve our understanding midlatitude continental convective cloud system life cycles, microphysics, GPM...
Based on observations from a hydrometeorological network the eastern slopes of Annapurna Range, nearly all annual precipitation at low elevations (< 2000 m MSL) in Nepal is liquid form, even during winter. However, high (> 3000 can receive up to 40% their as snowfall winter, with highest altitude stations (∼4000 MSL and above) having most total winter (which exceed 100 cm). Significant snowstorms are associated terrain-locked low-pressure systems that form when an upper-level disturbance...
During May–July 2000, the Severe Thunderstorm Electrification and Precipitation Study (STEPS) occurred in High Plains, near Colorado–Kansas border. STEPS aimed to achieve a better understanding of interactions between kinematics, precipitation, electrification severe thunderstorms. Specific scientific objectives included 1) apparent major differences precipitation output from supercells that have led them being classified as low (LP), classic or medium high precipitation; 2) lightning...
The Monsoon Himalayan Precipitation Experiment (MOHPREX) occurred during June 2001 along the south slopes of Himalayas in central Nepal. Radiosondes were launched around clock from two sites, one Marsyandi River basin on eastern footslopes Annapurna range, and farther to southwest near border with India. flights supported rainfall other hydrometeorological observations (including surface winds) network that has been operated this region since spring 1999. thermodynamic profiles obtained...
Abstract The Lightning Imaging Sensor (LIS) was launched to the International Space Station (ISS) in February 2017, detecting optical signatures of lightning with storm‐scale horizontal resolution during both day and night. ISS LIS data are available beginning 1 March 2017. Millisecond timing allows detailed intercalibration validation other spaceborne ground‐based sensors. Initial comparisons those sensors suggest flash detection efficiency around 60% (diurnal variability 51–75%), false...
Abstract The NASA Cyclone Global Navigation Satellite System (CYGNSS) constellation of eight satellites was successfully launched into low Earth orbit on 15 December 2016. Each satellite carries a radar receiver that measures GPS signals scattered from the surface. Wind speed over ocean is determined distortions in signal caused by wind-driven surface roughness. operates at sufficiently frequency to allow for propagation through all precipitation, including extreme rain rates present eyewall...
Abstract. Southern Africa produces almost a third of the Earth’s biomass burning (BB) aerosol particles, yet fate these particles and their influence on regional global climate is poorly understood. ORACLES (ObseRvations Aerosols above CLouds intEractionS) five-year NASA EVS-2 (Earth Venture Suborbital-2) investigation with three Intensive Observation Periods designed to study key atmospheric processes that determine impacts aerosols. During Hemisphere winter spring (June-October), reaching...
Abstract Intergroup contact is an established pathway to improve intergroup relations. Research has long focused on mainly positive and its capability Yet, if members of different groups meet, they will not only make positive, but possibly also negative experiences. Recent research considering both as well raised concerns about potentially stronger effects compared contact. These new insights the increasing awareness detrimental could lead doubts whether it always sensible bring individuals...
Abstract A database consisting of approximately 4000 storm observations has been objectively analyzed to determine environmental characteristics that produce high radar reflectivities above the freezing level, large total lightning flash rates on order 10 flashes per minute, and anomalous vertical charge structures (most notably, dominant midlevel positive charge). The is drawn from four regions United States featuring distinct environments, each with coinciding Lightning Mapping Array (LMA)...
Abstract This article provides an overview of the experimental design, execution, education and public outreach, data collection, initial scientific results from Remote Sensing Electrification, Lightning, Mesoscale/Microscale Processes with Adaptive Ground Observations (RELAMPAGO) field campaign. RELAMPAGO was a major campaign conducted in Córdoba Mendoza provinces Argentina western Rio Grande do Sul State Brazil 2018–19 that involved more than 200 scientists students United States,...
Abstract The Investigation of Microphysics and Precipitation for Atlantic Coast-Threatening Snowstorms (IMPACTS) is a NASA-sponsored field campaign to study wintertime snowstorms focusing on East Coast cyclones. This large cooperative effort takes place during the winters 2020–23 precipitation variability in winter cyclones improve remote sensing numerical forecasts snowfall. Snowfall within these storms frequently organized banded structures multiple scales. causes occurrence evolution wide...
Combined multiparameter radar, dual-Doppler, thermodynamic sounding, and lightning observations of 11 thunderstorms (6 from the midlatitudes, 5 Tropics) are examined. The span a wide spectrum intensities, weak monsoontype to severe tornadic, include both unicellular multicellular convection. In general, kinematically strongest storms featured lower production negative cloud-to-ground (typically <1 min−1 flash rates for large portions storms' lifetimes) when compared with more moderate...
Between 1949 and 1955 Britain was swept by a rising tide of panic about American-style or horror comics. The British press cried out in alarm: Now Ban This Filth That Poisons Our Children, Drive Out the Horror Comics. As one frenzied columnist protested: I feel as though have been trudging through sewer. Here is terrible twilight zone between sanity madness . peopled monsters, grave robbers, human flesh eaters. A campaign against ghoulish comic books climaxed an Act Parliament making it...
Abstract This study examines the spatial and temporal variability in diurnal cycle of clouds precipitation tied to topography within North American Monsoon Experiment (NAME) tier-I domain during 2004 NAME enhanced observing period (EOP, July–August), with a focus on implications for high-resolution estimation core monsoon. Ground-based retrievals from Event Rain Gauge Network (NERN) Colorado State University–National Center Atmospheric Research (CSU–NCAR) version 2 radar composites over...
[1] We report observations of two negative polarity gigantic jets sufficiently near very high-frequency (VHF) lightning mapping networks that the associated characteristics and charge transfer could be investigated. In both cases jet-producing flash began as ordinary intracloud with upper level channels attempting to exit cloud, then produced upward jet. Neither had developed ground, confirming major during occurred between cloud ionosphere. The leader progression one event was detected at...
A World Meteorological Organization weather and climate extremes committee has judged that the world's longest reported distance for a single lightning flash occurred with horizontal of 321 km (199.5 mi) over Oklahoma in 2007, while duration is an event lasted continuously 7.74 seconds southern France 2012. In addition, unanimously recommended amendment AMS Glossary Meteorology definition discharge as "series electrical processes taking place within 1 second" by removing phrase "within one...
The Marsyandi River basin in the central Nepalese Himalayas is a topographically complex region, with strong spatial gradients of precipitation over various timescales. A meteorological network consisting 20 stations was installed at variety elevations (528–4435 m) this and measurements rainfall were made during 1999 2000 summer monsoons. onsets monsoons Nepal examined different scales by using combination rain gauge, Meteosat-5, Tropical Rainfall Measuring Mission (TRMM), ECMWF analysis,...
The North American Monsoon Experiment (NAME) is an internationally coordinated process study aimed at determining the sources and limits of predictability warm-season precipitation over America. scientific objectives NAME are to promote a better understanding more realistic simulation convective processes in complex terrain, intraseasonal variability monsoon, response atmospheric circulation patterns slowly varying, potentially predictable surface boundary conditions. During summer 2004,...
The Stratospheric‐Tropospheric Experiment: Radiation, Aerosols and Ozone (STERAO)‐Deep Convection Field Project with closely coordinated chemical, dynamical, electrical, microphysical observations was conducted in northeastern Colorado during June July of 1996 to investigate the production NO x by lightning, transport redistribution chemical species troposphere thunderstorms, temporal evolution intracloud cloud‐to‐ground lightning for evolving storms on high plains. Major were airborne...
The origins of positive cloud‐to‐ground (+CG) lightning in the stratiform region a leading‐line, trailing‐stratiform mesoscale convective system (MCS) are investigated. Platforms include radars, NLDN data, and VHF 3‐D mapping system. This study examines small asymmetric MCS that occurred near Colorado‐Kansas border June 2000. In this storm 39 269 +CGs produced over nearly 5‐hour period came to ground within region. Of these, 30 initiated leading line propagated rearward before coming ground....