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RISInterhemispheric Asymmetry and Annual Synchronization of the Ozone Quasi-biennial Oscillation
Publisher: American Meteorological Society
Abstract: The quasi-biennial oscillation (QBO) in total column ozone has been examined at several tropical stations. The ozone QBO at Mauna Loa (19.5°N) was found to have a remarkable annual synchronization. Both positive and negative ...
Early Canadian Weather Observers and the “Year Without a Summer”
Publisher: American Meteorological Society
Abstract: The unusual spring and summer weather of the year 1816 in central Canada is discussed using Canadian newspaper accounts together with manuscript records from early amateur weather observers. Many of the spectacular ...
An Examination of Observed Southern Oscillation Effects in the Northern Hemisphere Stratosphere
Publisher: American Meteorological Society
Abstract: The effects of the Southern Oscillation on the December-February mean circulation in the Northern Hemisphere stratosphere were investigated using 34 years of data. No evidence for a significant relation between the Southern ...
Interannual Variability in the Northern Hemisphere Winter Middle Atmosphere in Control and Perturbed Experiments with the GFDL SKYHI General Circulation Model
Publisher: American Meteorological Society
Abstract: This paper reports on interannual variability of the Northern Hemisphere winter stratospheric circulation as simulated by the 40-level GFDL ?SKYHI? general circulation model. A 31-year control simulation was performed using ...
Latent Heat Release as a Possible Forcing Mechanism for Atmospheric Tides
Publisher: American Meteorological Society
Abstract: The consequences of the hypothesis of Lindzen (1978) that latent heat release may be a significant excitation mechanism for the semidiurnal atmospheric tide are examined in some detail. Harmonic analysis of hourly rainfall ...
Mean Wind Evolution through the Quasi-Biennial Cycle in the Tropical Lower Stratosphere
Publisher: American Meteorological Society
Abstract: A study of the zonal wind quasi-biennial oscillation (QBO) between 1972 and 1981 and at the 50 and 30 mb levels was performed using a total of over 5000 monthly mean observations from 79 stations between 20°S and 20°N. At ...
Quasi-Biennial and Other Long-Period Variations in the Solar Semidiurnal Barometric Oscillation: Observations, Theory and Possible Application to the Problem of Monitoring Changes in Global Ozone
Publisher: American Meteorological Society
Abstract: A 21-year record of monthly mean determinations of the solar semidiurnal surface pressure oscillation [S2(p) at Batavia (6.2°S) was analyzed to detect long-period variability. When the S2(p) determination were resolved ...
Detection of the Lunar Diurnal Atmospheric Tide
Publisher: American Meteorological Society
Abstract: A search was conducted for the principal lunar diurnal tide (O1) in an 18½ year time series of twice-daily digitized sea level pressure analyses covering the region 20?90°N. At 20, 25, 30 and possibly at 35°N there is ...
Some Features of the Climatology of the Northern Hemisphere Stratosphere Revealed by NMC Upper Atmosphere Analyses
Publisher: American Meteorological Society
Abstract: A zonal-mean climatology of the temperature, geostrophic zonal winds and the beat and momentum transports associated with the geostrophic winds has been constructed on the basis of almost four years of routine weekly ...