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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >IS CHEMICAL HEATING A MAJOR CAUSE OF THE MESOSPHERE INVERSION LAYER
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IS CHEMICAL HEATING A MAJOR CAUSE OF THE MESOSPHERE INVERSION LAYER

机译：化学加热是造成中层反演层的主要原因

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A region of thermal enhancement of the mesosphere has been detected on numerous occasions by in situ measurements, remote sensing from space, and lidar techniques. The source of these ''temperature inversion layers'' has been attributed in the literature to the dissipation relating to dynamical forcing by gravity wave or tidal activity, However, the conclusion that the dynamics of the mesopause region is the principal source for such anomalies is open to question. While it is certain that the dynamics of gravity wave breaking plays an important role in providing the source of momentum flux required to drive the diabatic circulation, evidence that gravity wave breaking can produce the inversion layer with amplitude as large as that observed in lidar measurements has been limited to results of numerical modeling. We note that an alternative source exists for the production of the thermal inversion layer in the mesosphere, i.e., the direct deposition of heat by exothermic chemical reactions, Two-dimensional modeling combining a comprehensive model of the mesosphere photochemistry with the dynamical transport of long-lived species shows that the region from 80 to 95 km may be heated as much as 3 to 10 K/d during the night and half this rate during the day, Given the uncertainties in our understanding of the dynamics and chemistry for the mesopause region, separating the two sources by passive observations of the mesosphere thermal structure looks to be difficult. Therefore we have considered an active means for producing a mesopause thermal layer, namely the release of ozone into the upper mesosphere from a rocket payload. The induced effects would include artificial enhancements of the OH and Na airglow intensities as well as the mesopause thermal structure, The advantage of the rocket release of ozone is that detection of these effects by ground-based imaging, radar, and lidar systems and comparison of these effects with model predictions would help quantify the partition of the artificial inversion layer production into sources of dynamical and chemical forcing, [References: 41]
机译：通过现场测量，太空遥感和激光雷达技术已在许多场合检测到了中层热增强区域。这些“温度反演层”的来源在文献中被归因于与重力波或潮汐活动引起的动力强迫有关的耗散，然而，断层中部区域的动力学是此类异常的主要来源的结论是值得商question。可以肯定的是，重力波分解的动力学在提供驱动绝热循环所需的动量通量的来源方面起着重要作用，但有证据表明，重力波分解可以产生振幅与激光雷达测量中观察到的一样大的反演层。仅限于数值建模的结果。我们注意到存在另一种在中层产生热转化层的来源，即通过放热化学反应直接沉积热量，二维模型结合了中层光化学的综合模型与长波的动态运移。有生命的物种表明，从80到95 km的区域在夜间可能会以高达3到10 K / d的速度被加热，而在白天则以一半的速度被加热。通过对中层热结构的被动观测来分离两个源似乎很困难。因此，我们考虑了一种产生中层绝热层的积极手段，即从火箭有效载荷将臭氧释放到高层中层。诱发的影响将包括人为提高OH和Na气辉强度以及更年期的热结构。火箭释放臭氧的优点是通过地面成像，雷达和激光雷达系统检测这些影响，并比较模型预测的这些效果将有助于量化人工反演层产量在动力和化学强迫源中的划分，[参考文献：41]

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