Abstract. A new atmospheric ozone profile climatology has been constructed by combining ozone profiles from the Aura Microwave Limb Sounder (MLS) and Modern‐Era Retrospective Analysis for Research Applications version 2 (MERRA2) Global Modeling Initiative (GMI) model simulation (M2GMI). The MLS and M2GMI ozone profiles are merged between 13 and 17 km (~159 and 88 hPa) with MLS used for stratospheric and GMI for primarily tropospheric levels. The time record for profiles from MLS and GMI is August 2004–December 2016. The derived seasonal climatology consists of monthly zonal-mean ozone profiles in 5-degree latitude bands from 90° S–90° N covering altitudes (in Z* log-pressure altitude) from zero to 80 km in 1 km increments. This climatology can be used as a priori information in satellite ozone retrievals, in atmospheric radiative transfer studies, and as a baseline to compare with other measured or model-simulated ozone. The MLS/GMI seasonal climatology shows a number of improvements compared to previous ozone profile climatologies based on MLS and ozonesonde measurements. These improvements are attributed mostly to continuous daily global coverage of GMI tropospheric ozone compared to sparse regional measurements from sondes. Only daytime measurements for MLS are used in the MLS/GMI climatology compared to the previous MLS/sonde climatology that averaged MLS day and night measurements together; the daytime-only measurements are important for applications involving the upper stratosphere and lower mesosphere where the ozone diurnal cycle is large. In addition to the seasonal climatology, we also derive an additive climatology to account for inter-annual variability in stratospheric zonal-mean ozone profiles which is based on a rotated empirical orthogonal function (REOF) analysis of Aura MLS ozone profiles. This REOF climatology starts in 1970 and captures most of the inter-annual variability in global stratospheric ozone including Quasi-Biennial Oscillation (QBO) signatures.

中文翻译：

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基于 Aura MLS 测量和 MERRA-2 GMI 模拟的卫星检索算法的全球臭氧剖面气候学

摘要。通过结合来自 Aura 微波肢体探测仪 (MLS) 的臭氧剖面和现代研究应用回顾性分析第 2 版 (MERRA2) 全球建模倡议 (GMI) 模型模拟 (M2GMI)，构建了一种新的大气臭氧剖面气候学。MLS 和 M2GMI 臭氧剖面在 13 和 17 公里（~159 和 88 hPa）之间合并，MLS 用于平流层，GMI 主要用于对流层水平。MLS 和 GMI 剖面的时间记录是 2004 年 8 月至 2016 年 12 月。 派生的季节性气候学包括覆盖海拔高度（以 Z* log-压力高度）从 0 到 80 公里，增量为 1 公里。这种气候学可用作卫星臭氧反演、大气辐射转移研究中的先验信息，并作为基线与其他测量或模型模拟的臭氧进行比较。与以前基于 MLS 和臭氧探空仪测量的臭氧剖面气候学相比，MLS/GMI 季节性气候学显示出许多改进。与探测器的稀疏区域测量相比，这些改进主要归因于 GMI 对流层臭氧的每日持续全球覆盖。与之前的 MLS/探空仪气候学相比，MLS/GMI 气候学仅使用 MLS 的白天测量值，后者将 MLS 白天和夜间测量值平均在一起；仅白天的测量对于涉及臭氧日循环较大的平流层上层和中层下层的应用很重要。除了季节性气候，我们还推导出了一种附加气候学，以解释平流层纬向平均臭氧剖面的年际变化，这是基于 Aura MLS 臭氧剖面的旋转经验正交函数 (REOF) 分析。这种 REOF 气候学始于 1970 年，捕捉了全球平流层臭氧的大部分年际变化，包括准两年振荡 (QBO) 特征。