A5042630716- Magnetic confinement fusion research
- Plasma Diagnostics and Applications
- Ionosphere and magnetosphere dynamics
- Plant Water Relations and Carbon Dynamics
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Fusion materials and technologies
- Solar and Space Plasma Dynamics
- Climate variability and models
- Remote Sensing in Agriculture
- Nuclear reactor physics and engineering
- Geomagnetism and Paleomagnetism Studies
- Nuclear Physics and Applications
- Tree-ring climate responses
- Metal and Thin Film Mechanics
- Soil Moisture and Remote Sensing
- Laser-Plasma Interactions and Diagnostics
- Meteorological Phenomena and Simulations
- Hydrology and Watershed Management Studies
- Fluid Dynamics and Turbulent Flows
- Gyrotron and Vacuum Electronics Research
- Solar Radiation and Photovoltaics
- Electron and X-Ray Spectroscopy Techniques
- Greenhouse Technology and Climate Control
- Archaeology and Natural History
ITER
2015-2024
Culham Science Centre
2024
Culham Centre for Fusion Energy
2024
Universidad de Sonora
2012-2022
ORCID
2022
WellStar Douglas Hospital
2021
Universidad de Hermosillo
2004-2020
Chevron (Australia)
2020
Royal Military Academy
2020
Guy's and St Thomas' NHS Foundation Trust
2020
Global-scale studies suggest that dryland ecosystems dominate an increasing trend in the magnitude and interannual variability of land CO2 sink. However, such analyses are poorly constrained by measured exchange drylands. Here we address this observation gap with eddy covariance data from 25 sites water-limited Southwest region North America observed ranges annual precipitation 100-1000 mm, temperatures 2-25°C, records 3-10 years (150 site-years total). Annual fluxes were integrated using...
Soil moisture control on evapotranspiration is poorly understood in ecosystems experiencing seasonal greening. In this study, we utilize a set of multi‐year observations at four eddy covariance sites along latitudinal gradient vegetation greening to infer the ET ‐θ relation during North American monsoon. Results reveal significant seasonal, interannual and ecosystem variations observed directly linked particular, monsoon‐dominated adjust their relation, through changes unstressed plant...
Abstract. Instantaneous evapotranspiration rates and surface water stress levels can be deduced from remotely sensed temperature data through the energy budget. Two families of methods defined: contextual methods, where are scaled on a given image between hot/dry cool/wet pixels for particular vegetation cover, single-pixel which evaluate latent heat as residual balance one pixel independently others. Four models, two (S-SEBI modified triangle method, named VIT) (TSEB, SEBS) applied over...
Recent research suggests that mineral dust plays an important role in terrestrial weather and climate, not only by altering the atmospheric radiation budget, but also affecting cloud microphysics optical properties. In addition, transport related Aeolian processes have been substantially modifying surface of Mars. Dusty convective plumes devils are frequently observed deserts ubiquitous features Martian landscape. There is evidence they sources on both planets. Many studies shown a small...
A finite but small injection of carbon into the TEXT tokamak edge induces significant temperature perturbations throughout plasma. Large, rapid decreases are observed in outer third, while temperatures inner third promptly begin to rise. The effects cannot be reproduced with transport coefficients that functions only local thermodynamic variables. large increase ${\ensuremath{\chi}}_{e}$ must occur within 100 \ensuremath{\mu}s region, and simultaneously decrease interior. Increases density...
In the North American monsoon (NAM) region, in‐phase seasonality in precipitation and radiation should lead to corresponding changes catchment hydrologic response its spatiotemporal variability. Nevertheless, relatively little is known on NAM region because of paucity observations. Numerical watershed models, tested against field remote sensing data, can aid identifying patterns controls exerted by climate, soil, vegetation, terrain properties. this study, we utilize a distributed model...
The response of a tokamak discharge to sharp drop in edge temperature differs significantly from that expected typical local transport models several important respects. Laser ablation carbon induces large (ΔT/T≤70%), rapid (<200 μs) electron drops the outermost region plasma, r/a≥0.9. This cold pulse proceeds through outer plasma (r/a≥0.75), rapidly compared with power balance or sawtooth predictions. However, shrinks markedly thereafter, disappearing near r/a∼0.5. Within r/a∼0.3,...
Abstract Relatively little is currently known about the spatiotemporal variability of land surface conditions during North American monsoon, in particular for regions complex topography. As a result, role played by land–atmosphere interactions generating convective rainfall over steep terrain and sustaining monsoon still poorly understood. In this study, variation hydrometeorological along large-scale topographic transect northwestern Mexico described. The field experiment consisted daily...
The tritium input to groundwater, represented as volume‐weighted mean concentrations in precipitation, has been close constant Tucson and Albuquerque since 1992, the decrease at tail end of bomb pulse ceased. To determine future usefulness measurements southwestern North America, levels seasonal aggregate precipitation samples have gathered from 26 sites. averages range 2 9 units (TU). Tritium increase with site latitude, possibly distance coast altitude, reflecting local ratios combination...
Regional analysis of water use efficiency (WUE) is a relevant method for diagnosing the performance irrigation systems in water-limited environments. In this study, we investigated potential FORMOSAT-2 images to provide spatial estimates WUE over irrigated wheat crops cultivated within semi-arid Yaqui Valley, northwest Mexico. provided us with unique dataset 36 at high resolution (8 m) encompassing growing season from November 2007 May 2008. Time series green leaf area index were derived...
Abstract Due to their large extent and high primary productivity, tropical dry forests (TDF) are important contributors atmospheric carbon exchanges in subtropical regions. In northwest Mexico, a bimodal precipitation regime that includes winter derived from Pacific storms summer the North American monsoon (NAM) couples water availability with ecosystem processes. We investigated net production of TDF using 4.5 year record fluxes obtained eddy covariance method complemented remotely sensed...
Abstract Seasonal vegetation changes during the North American monsoon play a major role in modifying water, energy, and momentum fluxes. Nevertheless, most models parameterize plants as static component or with averaged seasonal variations that ignore interannual differences their potential impact on evapotranspiration ( ET ) its components. Here parameters derived from remote sensing data were coupled hydrologic model at two eddy covariance (EC) sites observations spanning multiple...
Abstract A phase-modulated dispersion interferometer combined with a polarimeter is currently being designed in ITER. This diagnostic, called DIP (Density Interferometer Polarimeter), aims at performing reliable line-averaged electron density ( n e ) measurements time resolution of 1 ms and an accuracy 10% during ramp up/down phases, 2% flat-top, serving as complementary system for ITER's main the TIP (Toroidal Interferometer/Polarimeter). based on CO 2 laser λ = 9.6 μm). It inherently...
The mechanism(s) responsible for anomalous heat transport in the tokamak plasma core has remained elusive to experimental verification. In this paper hypothesis that high-frequency electrostatic turbulence can account measured electron Ohmically heated discharges of Texas Experimental Tokamak-Upgrade (TEXT-U) [Proceedings 15th Symposium on Fusion Technology, Utrecht (Elsevier, Amsterdam, 1989), Vol. 1, p. 342] is tested. To accomplish this, temperature fluctuations have been determined from...
Results obtained on the Madison Symmetric Torus (MST) reversed-field pinch [Fusion Technol. 19, 131 (1991)] after installation of design poloidal field winding are presented. Values βθe0≡2μ0ne0Te0/B2θ(a)∼12% achieved in low-current (I=220 kA) operation; here, ne0 and Te0 central electron density temperature, Bθ(a) is magnetic at plasma edge. An observed decrease βθe0 with increasing current may be due to inadequate fueling, enhanced wall interaction, growth a radial error vertical cut shell...
Abstract The vegetation in the core region of North American monsoon (NAM) system changes dramatically after onset summer rains so that large may be expected surface fluxes radiation, heat, and moisture. Most this lies rugged terrain western Mexico very few measurements these have been made past. Surface energy balance were at seven sites Sonora, Mexico, Arizona during intensive observation period (IOP) Monsoon Experiment (NAME) 2004 to better understand how land change alters flux...
ITER magnetic diagnostics are now in their detailed design and R&D phase. They have passed conceptual reviews a working diagnostic specification has been prepared aimed at the project requirements. This paper highlights specific progress, particular, for in-vessel coils, steady state sensors, saddle loops divertor sensors. Key changes measurement specifications, concept of software electronics also outlined.
Abstract Water‐limited ecosystems occupy nearly 30% of the Earth, but arguably, controls on their ecosystem processes remain largely uncertain. We analyzed six site years eddy covariance measurements evapotranspiration (ET) from 2008 to 2010 at two water‐limited shrublands: one dominated by winter precipitation (WP site) and another summer (SP site), with similar solar radiation patterns in Northern Hemisphere. determined how physical forcing factors (i.e., net ( R n ), soil water content...