Downward migration of extratropical zonal wind anomalies
نویسندگان
چکیده
منابع مشابه
Downward migration of extratropical zonal wind anomalies
We show (in confirmation of previous work) using oneand three-dimensional models that extratropical zonal wind anomalies, produced by fluctuating Rossby wave forcing in the troposphere, appear first in the stratosphere, and migrate downward into the troposphere. By systematically eliminating wave reflection and “downward control” through an induced meridional circulation, it is shown that the d...
متن کاملIntraseasonal Variability of the Zonal-Mean Extratropical Tropopause Height
The physical processes that drive the fluctuations of the extratropical tropopause height are examined with the National Centers for Environmental Prediction–National Center for Atmospheric Research (NCEP–NCAR) reanalysis data. A composite zonal-mean heat budget analysis for the Northern Hemisphere winter shows that fluctuations in the extratropical tropopause height result not only from a warm...
متن کاملSeasonal persistence of ozone and zonal wind anomalies in the equatorial stratosphere
[1] Analysis of the variability of equatorial ozone profiles in the Satellite Aerosol and Gas Experiment‐corrected Solar Backscatter Ultraviolet data set demonstrates a strong seasonal persistence of interannual ozone anomalies, revealing a seasonal dependence to equatorial ozone variability. In the lower stratosphere (40–25 hPa) and in the upper stratosphere (6–4 hPa), ozone anomalies persist ...
متن کاملThe Influence of the Quasi-Biennial Oscillation on the Troposphere in Winter in a Hierarchy of Models. Part I: Simplified Dry GCMs
A dry primitive equation model is used to explain how the quasi-biennial oscillation (QBO) of the tropical stratosphere can influence the troposphere, even in the absence of tropical convection anomalies and a variable stratospheric polar vortex. QBO momentum anomalies induce a meridional circulation to maintain thermal wind balance. This circulation includes zonal wind anomalies that extend fr...
متن کاملInterference of extratropical surface climate anomalies induced by
8 [1] The El Niño/Southern Oscillation (ENSO) and 9 stratospheric sudden warmings (SSWs) each induce 10 significant surface climate anomalies in Northern latitudes 11 during winter. Nonetheless, possible connections between 12 the impacts of the ENSO and SSWs remain relatively 13 unexplored. Using both observational analysis and global 14 climate model (GCM) experiments, we show that the 15 imp...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Geophysical Research
سال: 2003
ISSN: 0148-0227
DOI: 10.1029/2002jd002773