A5036598908- Soil Moisture and Remote Sensing
- Meteorological Phenomena and Simulations
- Climate variability and models
- Hydrology and Watershed Management Studies
- Semiconductor Quantum Structures and Devices
- Soil and Unsaturated Flow
- Climate change and permafrost
- Cryospheric studies and observations
- Precipitation Measurement and Analysis
- Fire effects on ecosystems
- Atmospheric and Environmental Gas Dynamics
- Quantum and electron transport phenomena
- Landslides and related hazards
- Plant Water Relations and Carbon Dynamics
- Calibration and Measurement Techniques
- Semiconductor materials and devices
- Geophysics and Gravity Measurements
- Soil Mechanics and Vehicle Dynamics
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Adaptive optics and wavefront sensing
- Magnetic Field Sensors Techniques
- Forest ecology and management
- Optical properties and cooling technologies in crystalline materials
- Physics of Superconductivity and Magnetism
- Electromagnetic Compatibility and Noise Suppression
Bureau of Meteorology
2012-2021
Natural Hazards Research Australia
2015-2020
Australian Government
2011
Met Office
1992-1997
University of Warwick
1990-1992
Abstract. We describe the HadGEM2 family of climate configurations Met Office Unified Model, MetUM. The concept a model "family" comprises range specific incorporating different levels complexity but with common physical framework. includes atmosphere and ocean components, without vertical extension to include well-resolved stratosphere, an Earth-System (ES) component which dynamic vegetation, biology atmospheric chemistry. improvements designed address systematic errors encountered in...
Abstract. Currently, no extensive, near real time, global soil moisture observation network exists. Therefore, the Met Office analysis scheme has instead used observations of screen temperature and humidity. A number new space-borne remote sensing systems, operating at microwave frequencies, have been developed that provide a more direct retrieval surface moisture. These systems are attractive since they data coverage horizontal resolution is similar to weather forecasting models. Several...
Abstract. The Bureau of Meteorology Atmospheric high-resolution Regional Reanalysis for Australia (BARRA) is the first atmospheric regional reanalysis over a large region covering Australia, New Zealand, and Southeast Asia. production with approximately 12 km horizontal resolution – BARRA-R well underway completion expected in 2019. This paper describes numerical weather forecast model, data assimilation methods, forcing observational used to produce BARRA-R, analyses results from 2003–2016...
Abstract Though coarse in spatial resolution, the nearly all weather measurements from passive microwave sensors can help improving spatio‐temporal coverage of optical and thermal infrared for monitoring vegetation changes on land surface. This study demonstrates use depth (VOD) retrievals Soil Moisture Active Passive mission capturing alterations recent 2019 to 2020 Australian bushfires drought. The impact disturbances terrestrial water budget is examined by assimilating VOD into a dynamic...
Abstract. We describe the HadGEM2 family of climate configurations Met Office Unified Model, MetUM. The concept a model "family" comprises range specific incorporating different levels complexity but with common physical framework. includes atmosphere and ocean components, without vertical extension to include well-resolved stratosphere, an Earth-System (ES) component which dynamic vegetation, biology atmospheric chemistry. improvements designed address systematic errors encountered in...
Abstract. Modern land surface model simulations capture soil profile water movement through the use of hydraulics sub-models, but good hydraulic parameterisations are often lacking, especially in tropics. We present much-improved gridded data sets parameters for critical area tropical South America, describing across region to 30 cm depth. Optimal parameter values given Brooks and Corey, Campbell, van Genuchten–Mualem Genuchten–Burdine models, which widely used sub-models models. This has...
The authors examine the role of interface roughness (IFR) scattering in electron transport a GaAs/GaAlAs superlattice, using simple model. IFR is assumed to be small, slowly varying and characterised by height lateral size. In contrast with previous studies take barrier finite. They find that use an infinite approximation leads large errors. Fermi's golden rule calculate rates Boltzmann equation scattering-limited mobility growth direction at 300 K for low density non-degenerate gas. limited...
Abstract The McArthur Forest Fire Danger Index used in Australia for operational fire warnings has a component representing fuel availability called the Drought Factor (DF). DF is partly based on soil moisture deficit, calculated as either Keetch‐Byram (KBDI) or Mount's Soil Dryness (MSDI). KBDI and MSDI are simplified water balance models driven by observation daily rainfall temperature. In this work, gridded analyses computed at horizontal resolution of 5 km verified against in‐situ...
Abstract We describe a nonlinear analysis scheme capable of directly treating observations which have non‐Gaussian error distribution. This is shown to be generalization the familiar optimum interpolation and must solved iteratively. approach treatment gross errors compared with more traditional in quality‐control step precedes analysis. Simulation experiments are performed many characteristics from proposed space‐borne atmospheric laser Doppler instrument 50% probability error. Both...
Recent experimental and theoretical results indicate that optical phonons in a GaAs/Ga1-xAlxAs heterojunctions show strong spatial modulation. The form of the modulation has been controversial. However, it recently shown scalar potential electric field associated with is well described by dielectric continuum model. authors present first calculation electron mobility superlattice which takes into account confinement both electrons phonons. for low-density nondegenerate gas evaluated...
Calculation of longitudinal optical (LO) mode potential functions and dispersion curves are made for a AlAs/GaAs/AlAs quantum well using macroscopic model. The interface boundary conditions employed continuity normal components both electric flux density relative ionic displacement. In the non-dispersive limit model yields unique two types: confined modes modes. almost identical to those calculated microscopic by Huang Zhu (1988). these predicted dielectric continuum introduction bulk in...
Abstract. Currently, no extensive global soil moisture observation network exists. Therefore, the Met Office analysis scheme has instead used observations of screen temperature and humidity. A number new space-borne remote sensing systems, operating at microwave frequencies, have been developed that provide a more direct retrieval surface moisture. These systems are attractive since they data coverage horizontal resolution is similar to weather forecasting models. Several studies show...
Abstract. The Bureau of Meteorology Atmospheric high-resolution Regional Reanalysis for Australia (BARRA) is the first atmospheric regional reanalysis over a large region covering Australia, New Zealand and southeast Asia. production with approximately 12 km lateral resolution – BARRA-R well underway completion expected in 2019. This paper describes numerical weather forecast model, data assimilation methods, forcing observational used to produce BARRA-R, analyses results from 2007–2016...
Abstract A two‐dimensional cloud‐resolving model is used to simulate a tropical squall line and examine its sensitivity long‐wave radiation. Model results show that the magnitude of radiation depend on organization structure line. For one simulation, inclusion increased surface precipitation by nearly third. Long‐wave also found enhance mid‐level rear inflow upper‐level outflow Sensitivity experiments are performed role cloud‐top cooling cloud‐base warming, differential between clear cloudy...
Abstract. Modern land surface model simulations capture soil profile water movement through the use of hydraulics sub-models, but good hydraulic parameterisations are often lacking, especially in tropics. We present much-improved gridded datasets parameters for critical area tropical South America, describing across region to 30 cm depth. Optimal parameter values given Brooks and Corey, Campbell, van Genuchten–Mualem Genuchten–Burdine models, which widely-used sub-models Land Surface Models....
The water and energy fluxes at the land-atmosphere interface depend heavily on soil moisture content, which imposes a significant control evaporation, infiltration runoff.Nonetheless, temporal evolution is not easy to measure or monitor large scales due its spatial variability, largely driven by local variation in properties vegetation cover.As consequence, dynamics are generally estimated using land surface models, with model physics based lowresolution property maps, may include errors...