16 Result(s)
within
Thomas J. Bracegirdle
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Article
The impact of wintertime sea-ice anomalies on high surface heat flux events in the Iceland and Greenland Seas
The gyres of the Iceland and Greenland Seas are regions of deep-water formation, driven by large ocean-to-atmosphere heat fluxes that have local maxima adjacent to the sea-ice edge. Recently these regions have...
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West Antarctic ice loss influenced by internal climate variability and anthropogenic forcing
Recent ice loss from the West Antarctic Ice Sheet has been caused by ocean melting of ice shelves in the Amundsen Sea. Eastward wind anomalies at the shelf break enhance the import of warm Circumpolar Deep Wat...
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Open AccessPublisher Correction: Critical Southern Ocean climate model biases traced to atmospheric model cloud errors
'In the original HTML version of this Article, ref.12 was incorrectly cited in the first sentence of the first paragraph of the Introduction. The correct citation is ref. 2. This has now been corrected in the ...
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Open AccessCritical Southern Ocean climate model biases traced to atmospheric model cloud errors
The Southern Ocean is a pivotal component of the global climate system yet it is poorly represented in climate models, with significant biases in upper-ocean temperatures, clouds and winds. Combining Atmospher...
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More losers than winners in a century of future Southern Ocean seafloor warming
The waters of the Southern Ocean are projected to warm over the coming century, with potential adverse consequences for native cold-adapted organisms. Warming waters have caused temperate marine species to shi...
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Assessment of sea ice-atmosphere links in CMIP5 models
The Arctic is currently undergoing drastic changes in climate, largely thought to be due to so-called ‘Arctic amplification’, whereby local feedbacks enhance global warming. Recently, a number of observational...
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Climate change drives expansion of Antarctic ice-free habitat
Antarctic terrestrial biodiversity occurs almost exclusively in ice-free areas that cover less than 1% of the continent. Climate change will alter the extent and configuration of ice-free areas, yet the distri...
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Absence of 21st century warming on Antarctic Peninsula consistent with natural variability
Here it is shown that the late twentieth century warming trends in the Antarctic Peninsula have ceased, with the Peninsula having instead been cooling for most of the twenty-first century, underscoring the con...
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Open AccessAntarctic sea ice increase consistent with intrinsic variability of the Amundsen Sea Low
We investigate the relationship between atmospheric circulation variability and the recent trends in Antarctic sea ice extent (SIE) using Coupled Model Intercomparison Project Phase 5 (CMIP5) atmospheric data,...
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An examination of the relationship between the Southern Annular Mode and Antarctic surface air temperatures in the CMIP5 historical runs
Strong relationships exist between the Southern Annular Mode (SAM) and surface air temperature (SAT) across much of Antarctica. Changes in the SAM will have a profound influence on future Antarctic climate so ...
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Precipitation pathways for five new ice core sites in Ellsworth Land, West Antarctica
Ice cores provide a wealth of information about past climate and atmospheric circulation however a good understanding of the precipitation patterns, potential source regions and transport pathways is essential...
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Sources of uncertainty in projections of twenty-first century westerly wind changes over the Amundsen Sea, West Antarctica, in CMIP5 climate models
The influence of changes in winds over the Amundsen Sea has been shown to be a potentially key mechanism in explaining rapid loss of ice from major glaciers in West Antarctica, which is having a significant im...
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Higher precision estimates of regional polar warming by ensemble regression of climate model projections
This study presents projections of twenty-first century wintertime surface temperature changes over the high-latitude regions based on the third Coupled Model Inter-comparison Project (CMIP3) multi-model ensem...
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The seasonal cycle of stratosphere-troposphere coupling at southern high latitudes associated with the semi-annual oscillation in sea-level pressure
The semi-annual oscillation (SAO) in sea-level pressure at high southern latitudes is the consequence of a twice-yearly contraction (and strengthening) and expansion (and weakening) of the storm track between ...
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Marine cold-air outbreaks in the North Atlantic: temporal distribution and associations with large-scale atmospheric circulation
The spatial and temporal distributions of marine cold air outbreaks (MCAOs) over the northern North Atlantic have been investigated using re-analysis data for the period from 1958 to 2007. MCAOs are large-scal...
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Marine cold-air outbreaks in the future: an assessment of IPCC AR4 model results for the Northern Hemisphere
For many locations around the globe some of the most severe weather is associated with outbreaks of cold air over relatively warm oceans, referred to here as marine cold-air outbreaks (MCAOs). Drawing on empir...
