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RISZonal Harmonic Standing Waves in the NCAR Global Circulation Model
Publisher: American Meteorological Society
Abstract: Zonal harmonic analysis has been carried out on 30-day mean pressure fields of several runs of the NCAR global circulation model (GCM): A January 6-layer case with the earth's orography; a January 6-layer case without ...
Spectral Analysis of Seasonal Precipitation Data from North America and Europe
Publisher: American Meteorological Society
Abstract: Spectral analysis of 64-year time series (1897?1960) of seasonal precipitation data from 71 North American and 27 European meteorological stations has been performed. There is little evidence for statistically significant ...
The Influence of Snowcover on the Atmospheric Circulation and Its Role in Climatic Change: An Analysis Based on Results from the NCAR Global Circulation Model
Publisher: American Meteorological Society
Abstract: The NCAR global circulation model has been used with boundary conditions representing those of a glacial period July, except that areas in North America, Europe, Asia and South America, which formerly were glaciated, have ...
The Connection between Trends of Mean Temperature and Circulation at the Surface: Part II. Summer
Publisher: American Meteorological Society
Abstract: The local temperature trends in summer are not so obviously associated with advection changes as are those in winter. This appears to be due to weaker temperature contrasts at middle and high latitudes in summer combined ...
The Connection Between Trends of Mean Temperature and Circulation at the Surface: Part I. Winter
Publisher: American Meteorological Society
Abstract: We have demonstrated that regional temperature trends at the surface in winter are connected with circulation changes on the scale of long waves, and that within a given period the trends change sign both with longitude ...
The Connection between Trends of Mean Temperature and Circulation at the Surface: Part III. Spring and Autumn
Publisher: American Meteorological Society
Abstract: The sign of the weighted temperature change over two periods (1950?64, 1942?72) for 15°?80°N was determined by the change in the polar region in spring and autumn, as it was in winter but not in summer. Each of the four ...
An Examination of the Northern Hemisphere Sea-Level Pressure Data Set
Publisher: American Meteorological Society
Abstract: For each grid point (5° latitude by 5° longitude) and each season, the long-term mean sea-level pressure (1899?1972) and its standard deviation were found, using a data set compiled by NCAR. Individual deviations from the ...
The Connection between Trends of Mean Temperature and Circulation at the Surface: Part IV. Comparison of the Surface Changes in the Northern Hemisphere with the Upper Air and with the Antarctic in Winter
Publisher: American Meteorological Society
Abstract: During 24 years when the 700 mb winter mean temperature dropped over most of the hemisphere north of 20°N, the biggest falls were in the belt of strongest baroclinity and were simultaneous with a southward movement and ...
The Association between Latitudinal Temperature Gradient and Eddy Transport. Part II: Relationships between Sensible Heat Transport by Stationary Waves and Wind, Pressure and Temperature in Winter
Publisher: American Meteorological Society
Abstract: This paper continues the description of the connection between transport of sensible heat by eddies in winter and temperature, wind and pressure. The emphasis is on the transport by the quasi-stationary eddies, and we ...