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RISTrends in the Southern Annular Mode from Observations and Reanalyses
Publisher: American Meteorological Society
Abstract: Several papers have described a significant trend toward the positive phase of the Southern Hemisphere annular mode (SAM) in recent decades. The SAM is the dominant mode of atmospheric variability in the Southern Hemisphere ...
Trends in Antarctic Geopotential Height and Temperature: A Comparison between Radiosonde and NCEP–NCAR Reanalysis Data
Publisher: American Meteorological Society
Abstract: A comparison of 40-yr (1960?99) trends in Antarctic geopotential height and temperature from quality controlled radiosonde observations and NCEP?NCAR reanalysis (NNR) data is undertaken. Observations from four Antarctic ...
Decadal Variability in the Impact of Atmospheric Circulation Patterns on the Winter Climate of Northern Russia
Publisher: American Meteorological Society
Synoptic-Scale Weather Systems Observed during the FROST Project via Scatterometer Winds
Publisher: American Meteorological Society
Abstract: Using data obtained during January 1995?the third of three special observing periods associated with the Antarctic First Regional Observing Study of the Troposphere project?over a sector of the Southern Ocean (SO), this ...
A Predominant Reversal in the Relationship between the SAM and East Antarctic Temperatures during the Twenty-First Century
Publisher: American Meteorological Society
Abstract: he scientific literature portrays a temporally invariant spatial relationship between the phase of the southern annular mode (SAM) and the sign of surface air temperature (SAT) anomalies across Antarctica. However, here ...
The Reliability of Antarctic Tropospheric Pressure and Temperature in the Latest Global Reanalyses
Publisher: American Meteorological Society
Abstract: n this study, surface and radiosonde data from staffed Antarctic observation stations are compared to output from five reanalyses [Climate Forecast System Reanalysis (CFSR), 40-yr ECMWF Re-Analysis (ERA-40), ECMWF Interim ...
Artificial Surface Pressure Trends in the NCEP–NCAR Reanalysis over the Southern Ocean and Antarctica
Publisher: American Meteorological Society
Abstract: An examination of 50 years of the National Centers for Environmental Prediction (NCEP)?National Center for Atmospheric Research (NCAR) reanalysis from 1949 to 1998 reveals that significant spurious trends occur in the ...
The Relationship between the Southern Hemisphere Annular Mode and Antarctic Peninsula Summer Temperatures: Analysis of a High-Resolution Model Climatology
Publisher: American Meteorological Society
Abstract: The large regional summer warming on the east coast of the northern Antarctic Peninsula (AP), which has taken place since the mid-1960s, has previously been proposed to be caused by a trend in the Southern Hemisphere Annular ...
The Role of Eddies in the Southern Ocean Temperature Response to the Southern Annular Mode
Publisher: American Meteorological Society
Abstract: The role of eddies in modulating the Southern Ocean response to the southern annular mode (SAM) is examined, using an ocean model run at multiple resolutions from coarse to eddy resolving. The high-resolution versions of ...
Historical SAM Variability. Part I: Century-Length Seasonal Reconstructions
Publisher: American Meteorological Society
Abstract: Seasonal reconstructions of the Southern Hemisphere annular mode (SAM) index are derived to extend the record before the reanalysis period, using station sea level pressure (SLP) data as predictors. Two reconstructions ...