30 Result(s)
within
Theodore G. Shepherd
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Article
Clouds, circulation and climate sensitivity
Our understanding of the interactions between clouds, circulation and climate is limited. Four central research questions — now tractable through advances in models, concepts and observations — are proposed to...
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Article
Atmospheric circulation as a source of uncertainty in climate change projections
Scientific confidence in climate change effects is much higher for aspects related to global patterns of surface temperature, than for circulation. Circulation will remain hard to predict, necessitating a risk...
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Article
Open AccessSolar ultraviolet-B radiation and vitamin D: a cross-sectional population-based study using data from the 2007 to 2009 Canadian Health Measures Survey
Exposure to solar ultraviolet-B (UV-B) radiation is a major source of vitamin D3. Chemistry climate models project decreases in ground-level solar erythemal UV over the current century. It is unclear what impa...
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Article
Climate change projections and stratosphere–troposphere interaction
Climate change is expected to increase winter rainfall and flooding in many extratropical regions as evaporation and precipitation rates increase, storms become more intense and storm tracks move polewards. He...
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Chapter
How Good are Chemistry-Climate Models?
Chemistry-climate models (CCMs) are important tools for simulating stratospheric ozone changes that arise from changes in ozone-depleting substances and greenhouse gases. Interest in providing reliable future ...
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Article
Large climate-induced changes in ultraviolet index and stratosphere-to-troposphere ozone flux
Now that stratospheric ozone depletion has been controlled by the Montreal Protocol, interest has turned to the effects of climate change on the ozone layer. An atmospheric chemistry model suggests that climat...
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Article
Raising the roof
The atmosphere's lowermost 10 km have long been assumed to be almost solely responsible for weather and climate on Earth. Emerging evidence points to the layer above as an important influence on surface winds ...
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Chapter and Conference Paper
SELF-SIMILARITY OF VORTICITY DYNAMICS IN DECAYING TWO-DIMENSIONAL TURBULENCE
A new similarity theory is proposed for decaying two-dimensional Navier–Stokes turbulence, including the viscous range, which encompasses all Reynolds numbers and various degrees of hyperviscosity. In the high...
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Chapter and Conference Paper
Self-Similarity of Decaying Two-Dimensional Turbulence governed by the Charney—Hasegawa—Mima Equation
In decaying two-dimensional Navier—Stokes turbulence, Batchelor’s simi larity hypothesis fails due to the existence of coherent vortices. However, it has recently been shown that in decaying two-dimensional tu...
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Chapter
Ripa’s Theorem and its Relatives
In 1983, Pedro Ripa proved a stability theorem for parallel flows in rotating shallow-water dynamics which has since come to be known as Ripa’s theorem. It is singular for being the only known Arnol’d-type sta...
