Solar Energy Deposition Rates in the Mesosphere Derived from Airglow Measurements: Implications for the Ozone Model Deficit Problem
Solar Energy Deposition Rates in the Mesosphere Derived from Airglow Measurements: Implications for the Ozone Model Deficit Problem
复制标题
气辉测量得出的中间层太阳能沉积率：对臭氧模型缺陷问题的影响
DOI：
10.1029/2000jd900222
复制
发表时间：
2000
影响因子：
--
通讯作者：
M. Hagan
中科院分区：
文献类型：
--
作者：
M. Mlynczak;R. Garcia;R. Roble;M. Hagan
我们推导出由于臭氧吸收太阳紫外线辐射在中间层的能量沉积率。速率直接来自于1.27 μm氧日光发射的测量，而不依赖于臭氧丰度、臭氧吸收截面和臭氧哈特莱带紫外太阳辐照度的知识。本文分析了1982年至1986年太阳-中间层探测者卫星上近红外光谱仪获得的五十六个月的气辉资料。能量沉积率表现出高度依赖的年度和半年的变化。我们还发现，在低纬度90公里附近的温度和能量沉积率之间的正相关。这种相关性在很大程度上是由于温度和臭氧的半年振荡，并与模式计算是一致的。根据最近的理论和观测分析，也有一个可能的潮汐增强这种相关性的建议。然后将气辉导出的能量沉积率与多维数值模型计算的能量沉积率进行比较。观察到的沉积率和建模的沉积率通常在20%以内。能量沉积率的这种一致性意味着中间层中测量的臭氧体积混合比和模拟的臭氧体积混合比之间存在相同的一致性。只有在中纬度的上层中层，在冬季，我们得到的能量沉积率（因此臭氧混合比）一致和显着大于模式计算。这一结果与先前的研究相反，先前的研究表明，整个中间层的臭氧丰度存在很大的模型缺陷。本文介绍的太阳能沉积和加热的气候学可在中层大气能量预算项目网站http://heat.budget.gats.inc.com上向社区提供。
We derive rates of energy deposition in the mesosphere due to the absorption of solar ultraviolet radiation by ozone. The rates are derived directly from measurements of the 1.27-μm oxygen dayglow emission, independent of knowledge of the ozone abundance, the ozone absorption cross sections, and the ultraviolet solar irradiance in the ozone Hartley band. Fifty-six months of airglow data taken between 1982 and 1986 by the near-infrared spectrometer on the Solar-Mesosphere Explorer satellite are analyzed. The energy deposition rates exhibit altitude-dependent annual and semi-annual variations. We also find a positive correlation between temperatures and energy deposition rates near 90 km at low latitudes. This correlation is largely due to the semiannual oscillation in temperature and ozone and is consistent with model calculations. There is also a suggestion of possible tidal enhancement of this correlation based on recent theoretical and observational analyses. The airglow-derived rates of energy deposition are then compared with those computed by multidimensional numerical models. The observed and modeled deposition rates typically agree to within 20%. This agreement in energy deposition rates implies the same agreement exists between measured and modeled ozone volume mixing ratios in the mesosphere. Only in the upper mesosphere at midlatitudes during winter do we derive energy deposition rates (and hence ozone mixing ratios) consistently and significantly larger than the model calculations. This result is contrary to previous studies that have shown a large model deficit in the ozone abundance throughout the mesosphere. The climatology of solar energy deposition and heating presented in this paper is available to the community at the Middle Atmosphere Energy Budget Project web site at http://heat.budget.gats.inc.com.