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RISStructure and Evolution of Baroclinic Waves as Inferred from Regression Analysis
Publisher: American Meteorological Society
Abstract: The structure of transient disturbances with periods shorter than a week is documented an the basis of one-point regression maps and longitude?height sections derived from the National Meteorological Center (NMC) operational ...
Reexamination of the Structure of the Ageostrophic Wind in Baroclinic Waves
Publisher: American Meteorological Society
Abstract: This paper reexamines the structure of ageostrophic winds in a baroclinic wave presented by Lim, Holton, and Wallace. It is found that the nonzero growth rate is indispensible to the compete explanation of the observed ...
Diurnal and Semidiurnal Variations in the Time Series of 3-Hourly Assimilated Precipitation by NASA GEOS-1
Publisher: American Meteorological Society
Abstract: Time series and harmonic analyses were used to examine diurnal and semidiurnal oscillations in the time series of 3-hourly precipitation amounts from NASA GEOS-1. The diurnal and semidiurnal components of assimilated amounts ...
The Structure of the Ageostrophic Wind Field in Baroclinic Waves
Publisher: American Meteorological Society
Abstract: A high-pass filtered time series of the 500-mb height at a grid point in the Pacific storm track is regressed against the ageostrophic wind field at all grid points on the NMC grids for nine winters in order to determine ...
Assimilation of GPS Radio Occultation Refractivity Data with WRF 3DVAR and Its Impact on the Prediction of a Heavy Rainfall Event
Publisher: American Meteorological Society
Abstract: o accommodate accurate analyses and forecasts of a heavy rainfall event over the Korean Peninsula, the authors assimilated the GPS radio occultation (RO) data by using the Weather Research and Forecasting Model (WRF) and ...
Relationship between Cyclone Tracks, Anticyclone Tracks and Baroclinic Waveguides
Publisher: American Meteorological Society
Abstract: This study presents observational results concerning the structure and evolution of high-frequency fluctuations with periods shorter than 6 days in the geopotential height field. The results are based on a statistical ...
Differences between the Spring and Autumn Circulation of the Northern Hemisphere
Publisher: American Meteorological Society
Abstract: The phase of the annual cycle in the mean temperature of the Northern Hemisphere troposphere lags the conventional meteorological seasons (centered on April and October) by about two weeds. Hence, the conventional spring ...
Investigation of the Effects of Considering Balloon Drift Information on Radiosonde Data Assimilation Using the Four-Dimensional Variational Method
Publisher: American Meteorological Society
Abstract: ffects of balloon drift information (i.e., position and elapsed ascent time of the balloon) on the assimilation of radiosonde observations are investigated by using the Weather Research and Forecasting (WRF) Model and its ...
Interpretation of the Transient Variations in the Time Series of Precipitation Amounts in Seoul, Korea. Part I: Diurnal Variation
Publisher: American Meteorological Society
Abstract: Characteristics of temporal variations of precipitation for Seoul, Korea, have been examined using a 220-yr record. Precipitation records from modern rain gauges were used for 1908?96 together with the traditional Korean ...