A Two‐Dimensional Model Study of the QBO Signal in SAGE II NO2 and O3
Geophysical Research Letters 21:7 (1994) 589-592
Abstract:
Calculations of the QBO signal in SAGE II O3 and NO2 data between 1984 and 1991 are presented and have been investigated by using a two‐dimensional model. The isentropic 2D model is a fully interactive radiative‐dynamical‐chemical model in which the eddy fluxes of chemical species are calculated in a consistent manner. The QBO in the model has been forced by relaxing the equatorial zonal wind toward the observations at Singapore allowing the comparison of the model with observations from specific years. The model reproduces the observed vertical structure of the equatorial ozone anomaly with the well‐known transition from dynamical to photochemical control at around 28km. The model also reproduces the observed vertical structure of the SAGE II observed NO2 anomaly. The model studies have shown that it is the QBO modulation of NO2 which is the main cause of QBO signal in O3 above 30km. The model also reproduces the observed latitudinal structure of the QBO signals in O3 and NO2. Due to the differing horizontal distribution of O3 and NOy the ozone signal shows a distinct phase change in the subtropics whereas the NO2 anomaly gives a broader signal. Copyright 1994 by the American Geophysical Union.Coordinated UK Studies of the Atmosphere using UARS Data-Proposal in response to the Upper Atmosphere Research Satellite Guest Investigator Program
(1994)
Synoptic interpretation of measurements from HALOE
Journal of the atmospheric sciences 51 (1994) 20
using UARS Data
(1994)
The Modeled Latitudinal Distribution of the Ozone Quasi-Biennial Oscillation Using Observed Equatorial Winds
Journal of the Atmospheric Sciences American Meteorological Society 50:8 (1993) 1033-1046