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Reduced Atlantic Storminess during Last Glacial Maximum: Evidence from a Coupled Climate Model
Publisher: American Meteorological Society
Abstract: The Last Glacial Maximum (LGM), 21 000 yr before present, was the time of maximum land ice extent during the last ice age. A recent simulation of the LGM climate by a state-of-the-art fully coupled global climate model is ...
Thermally Driven and Eddy-Driven Jet Variability in Reanalysis
Publisher: American Meteorological Society
Abstract: wo important dynamical processes influence the extratropical zonal wind field: angular momentum transport by the thermally direct Hadley circulation (thermal-driving T) and momentum flux convergence by atmospheric waves ...
Upper Tropospheric Jet Axis Detection and Application to the Boreal Winter 2013/14
Publisher: American Meteorological Society
Abstract: his study presents a detection scheme for upper tropospheric jets. The scheme identifies locations on the dynamical tropopause where the wind shear perpendicular to the wind direction vanishes, and subsequently uses a ...
Influence of Tropical Pacific Sea Surface Temperature on the Genesis of Gulf Stream Cyclones
Publisher: American Meteorological Society
Abstract: his study investigates the relationship between tropical Pacific sea surface temperature (SST) variability and cyclogenesis over the Gulf Stream region of the North Atlantic. A cyclone identification scheme and Lagrangian ...
Can North Atlantic Sea Ice Anomalies Account for Dansgaard–Oeschger Climate Signals?
Publisher: American Meteorological Society
Abstract: North Atlantic sea ice anomalies are thought to play an important role in the abrupt Dansgaard?Oeschger (D?O) cycles of the last glacial period. This model study investigates the impacts of changes in North Atlantic sea ...
Extratropical Cyclogenesis Changes in Connection with Tropospheric ENSO Teleconnections to the North Atlantic: Role of Stationary and Transient Waves
Publisher: American Meteorological Society
Abstract: AbstractThis study investigates mechanisms for changes in wintertime extratropical cyclogenesis over North America and the North Atlantic during different phases of El Niño?Southern Oscillation (ENSO). Insights into the ...
The Mechanisms that Determine the Response of the Northern Hemisphere’s Stationary Waves to North American Ice Sheets
Publisher: American Meteorological Society
Abstract: AbstractStationary waves describe the persistent meanders in the west?east flow of the extratropical atmosphere. Here, changes in stationary waves caused by ice sheets over North America are examined and the underlying ...
Rapid Response of the Norwegian Atlantic Slope Current to Wind Forcing
Publisher: American Meteorological Society
Observed Atmospheric Coupling between Barents Sea Ice and the Warm-Arctic Cold-Siberian Anomaly Pattern
Publisher: American Meteorological Society
Abstract: he decline in Barents Sea ice has been implicated in forcing the ?warm-Arctic cold-Siberian? (WACS) anomaly pattern via enhanced turbulent heat flux (THF). This study investigates interannual variability in winter ...
Importance of Late Fall ENSO Teleconnection in the Euro-Atlantic Sector
Publisher: American Meteorological Society
Abstract: AbstractRecent studies have indicated the importance of fall climate forcings and teleconnections in influencing the climate of the northern mid- to high latitudes. Here, we present some exploratory analyses using observational ...