A5023752253- Climate variability and models
- Meteorological Phenomena and Simulations
- Tropical and Extratropical Cyclones Research
- Oceanographic and Atmospheric Processes
- Atmospheric and Environmental Gas Dynamics
- Geology and Paleoclimatology Research
- Geological formations and processes
- Cryospheric studies and observations
- Experimental and Theoretical Physics Studies
- Geophysics and Gravity Measurements
- Methane Hydrates and Related Phenomena
- Climate change impacts on agriculture
- Arctic and Antarctic ice dynamics
- Remote Sensing in Agriculture
- Geological Studies and Exploration
- Sensor Technology and Measurement Systems
- Circadian rhythm and melatonin
- Flow Measurement and Analysis
- Marine and environmental studies
- Engineering and Technology Innovations
- Experimental Learning in Engineering
- Computational Fluid Dynamics and Aerodynamics
- Marine and coastal ecosystems
- Advanced Numerical Methods in Computational Mathematics
- Climate Change and Geoengineering
Met Office
2010-2021
University of Reading
2016
University of Sheffield
2007-2012
Riverside Research Institute
1980
Stevens Institute of Technology
1967
Massachusetts Institute of Technology
1961
Abstract. We describe Global Atmosphere 6.0 and Land (GA6.0/GL6.0): the latest science configurations of Met Office Unified Model JULES (Joint UK Environment Simulator) land surface model developed for use across all timescales. includes ENDGame (Even Newer Dynamics General atmospheric modelling environment) dynamical core, which significantly increases mid-latitude variability improving a known bias. Alongside developments model's physical parametrisations, also in tropics, leads to an...
Abstract. A community diagnostics and performance metrics tool for the evaluation of Earth system models (ESMs) has been developed that allows routine comparison single or multiple models, either against predecessor versions observations. The priority effort so far to target specific scientific themes focusing on selected essential climate variables (ECVs), a range known systematic biases common ESMs, such as coupled tropical variability, monsoons, Southern Ocean processes, continental dry...
Abstract. We describe Global Atmosphere 4.0 (GA4.0) and Land (GL4.0): configurations of the Met Office Unified Model JULES (Joint UK Environment Simulator) community land surface model developed for use in global regional climate research weather prediction activities. GA4.0 GL4.0 are based on previous GA3.0 GL3.0 configurations, with inclusion developments made by its collaborators during annual development cycle. This paper provides a comprehensive technical scientific description as well...
ERA-Interim reanalysis data from the past 35 years have been used with a newly developed feature tracking algorithm to identify Indian monsoon depressions originating in or near Bay of Bengal. These were then rotated, centralized, and combined give fully three-dimensional 106-depression composite structure—a considerably larger sample than any previous detailed study on their structure. Many known features depression structure are confirmed, particularly existence maximum southwest center...
The South Asian monsoon is one of the most significant manifestations seasonal cycle. It directly impacts nearly third world's population and also has substantial global influence. Using 27-year integrations a high-resolution atmospheric general circulation model (Met Office Unified Model), we study changes in precipitation when horizontal resolution increased from approximately 200–40 km at equator (N96–N512, 1.9°–0.35°). high resolution, integration length ensemble size dataset make this...
We introduce explicit icebergs from a dynamic and thermodynamic iceberg model into an intermediate complexity climate model, which includes the coupled atmosphere‐ocean system. This modeling approach allows meltwater to be injected ocean on basis of thermodynamical considerations along trajectories. Icebergs are seeded known ice sheets in both hemispheres. Adding present‐day has minimal impact, but during Last Glacial Maximum (LGM), Atlantic overturning strength is reduced by third, while...
The Atlantic‐Mediterranean exchange of water at Gibraltar represents a significant heat and freshwater sink for the North Atlantic is major control on heat, salt budgets Mediterranean Sea. Consequently, an understanding response system to external changes vital full comprehension hydrographic responses in both ocean basins. Here, we use synthesis empirical (oxygen isotope, planktonic foraminiferal assemblage) modeling (analytical general circulation) approaches investigate Exchange...
Analysis of 20th century simulations the High resolution Global Environment Model (HiGEM) and Third Coupled Intercomparison Project (CMIP3) models shows that most have a cold sea-surface temperature (SST) bias in northern Arabian Sea during boreal winter. The association between SST South Asian monsoon has been widely studied observations models, with winter biases known to be detrimental rainfall simulation subsequent coupled general circulation models. However, causes these are not well...
Abstract. Various studies have shown the importance of Earth System feedbacks in climate system and necessity including these models used for making change projections. The HadGEM2 family Met Office Unified Model configurations combines model components which facilitate representation many different processes within system, atmosphere, ocean sea ice, terrestrial oceanic carbon cycle tropospheric chemistry. We examine climatology Asian summer monsoon present-day simulations idealised...
Abstract. A community diagnostics and performance metrics tool for the evaluation of Earth System Models (ESMs) has been developed that allows routine comparison single or multiple models, either against predecessor versions observations. The priority effort so far to target specific scientific themes focusing on selected Essential Climate Variables (ECVs), a range known systematic biases common ESMs, such as coupled tropical climate variability, monsoons, Southern Ocean processes,...
Abstract Ice‐rafted debris (IRD) seeded into the ocean from Northern Hemisphere ice sheets is found in cores along southwestern European margin through last glacial period. It known that origin of this IRD, especially off Iberia, can vary between North America and western Europe during short‐lived episodes greatly enhanced iceberg flux, as Heinrich events, although most events IRD has a American source. During longer times much lower fluxes use an intermediate complexity climate model,...
Abstract. Despite the importance of monsoon rainfall to over half world's population, many climate models current generation struggle capture some major features various systems. Studies development errors in several tropical regions have shown that they start develop very quickly, within first few days a model simulation, and can then persist timescales. Understanding sources such requires combination modelling techniques sensitivity experiments varying complexity. Here, we demonstrate how...
ABSTRACT The South Asian summer monsoon ( SASM ) exhibits large variability in the intraseasonal scale, and active break cycles of constitute dominant mode this variability. This has been subject many model‐based studies as improved simulation features also leads to better representation seasonal mean characteristics. We evaluate a recent Hadley centre regional climate model's performance, at low high resolutions forced by reanalysis, simulating various characteristics associated with . In...
An "ancient chestnut" of circuit theory is the energy loss in switched circuits made up lossless storage elements. For example, a charged capacitor, short-circuited by an ideal conductor, loses all its initial stored energy. This can be explained as limiting case problem, which could not physically carried out any experiment, where dissipated has indeterminate form (0·∞). paper gives pedagogical treatment this bringing distinctions between mathematical and physical problems. Energy...
Abstract. We describe Global Atmosphere 4.0 (GA4.0) and Land (GL4.0): configurations of the Met Office Unified Model JULES community land surface model developed for use in global regional climate research weather prediction activities. GA4.0 GL4.0 are based on previous GA3.0 GL3.0 configurations, with inclusion developments made by its collaborators during annual development cycle. This paper provides a comprehensive technical scientific description as well details how these differ from...
When acoustic or electromagnetic waves cancel by destructive interference, the wave impedance reflected to sources of energy changes so that input power is reduced correspondingly. Because this rather subtle point not discussed in most instructional treatments physics, misconceptions concerning apparently ’’missing’’ are widespread, as semipopular science writing. This paper presents an analysis cases and constructive analogous problems for lumped electrical mechanical systems.