A Two‐Dimensional Model Study of the QBO Signal in SAGE II NO2 and O3
A Two‐Dimensional Model Study of the QBO Signal in SAGE II NO2 and O3
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DOI：
10.1029/94gl00211
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发表时间：
1994-04
影响因子：
5.2
通讯作者：
M. Chipperfield;L. Gray;J. S. Kinnersley;J. Zawodny
中科院分区：
文献类型：
--
作者：
M. Chipperfield;L. Gray;J. S. Kinnersley;J. Zawodny
介绍了 1984 年至 1991 年间 SAGE II O3 和 NO2 数据中 QBO 信号的计算结果，并使用二维模型进行了研究。等熵二维模型是一种完全交互式的辐射动力学化学模型，其中以一致的方式计算化学物质的涡流。模型中的 QBO 是通过将赤道纬向风放松到新加坡的观测结果来强制的，以便将模型与特定年份的观测结果进行比较。该模型再现了观测到的赤道臭氧异常的垂直结构，以及众所周知的在 28 公里左右从动力控制到光化学控制的转变。该模型还再现了 SAGE II 观测到的 NO2 异常的垂直结构。模型研究表明，NO2的QBO调制是30km以上O3区域出现QBO信号的主要原因。该模型还再现了 O3 和 NO2 中观察到的 QBO 信号的纬度结构。由于 O3 和 NOy 的水平分布不同，臭氧信号在亚热带表现出明显的相位变化，而 NO2 异常则给出更广泛的信号。
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.