Impacts of the January 2005 solar particle event on noctilucent clouds and water at the polar summer mesopause
Impacts of the January 2005 solar particle event on noctilucent clouds and water at the polar summer mesopause
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DOI：
10.5194/acp-12-5633-2012
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发表时间：
2012-06
影响因子：
6.3
通讯作者：
H. Winkler;C. Savigny;J. Burrows;J. Wissing;M. Schwartz;A. Lambert;M. García‐Comas
中科院分区：
文献类型：
--
作者：
H. Winkler;C. Savigny;J. Burrows;J. Wissing;M. Schwartz;A. Lambert;M. García‐Comas
抽象的。利用冰粒子和离子化学模拟方法，研究了2005年1月太阳粒子事件对平流层云的影响。结果表明，减少发生率的微卫星云来自SCIAMACHY/Envisat仪器的测量可以复制一维模型模拟，如果使用的温度数据从MLS/Aura仪器。模式计算表明，平流层云的升华导致中层顶区水分分布的显著变化。这些模型的结果进行了比较，从MLS和MIPAS/Envisat卫星仪器的H2 O测量。卫星仪器没有观测到冰颗粒层以下明显的模拟水增强及其在SPE期间的减少。在海拔>85公里的卫星测量表明，在SPE的定性协议与模型预测的H2 O的增加。模式H2 O和低海拔观测值之间的差异可能归因于一维模式方法，特别是忽略了不均匀性和水平输送过程。此外，据透露，水的消耗，由于质子水合物的反应，在所考虑的太阳粒子事件只有一个微小的影响的冰粒子。
Abstract. The response of noctilucent clouds to the solar particle event in January 2005 is investigated by means of icy particle and ion chemistry simulations. It is shown that the decreasing occurrence rate of noctilucent clouds derived from measurements of the SCIAMACHY/Envisat instrument can be reproduced by one-dimensional model simulations if temperature data from the MLS/Aura instrument are used. The model calculations indicate that the sublimation of noctilucent clouds leads to significant changes of the water distribution in the mesopause region. These model results are compared with H 2 O measurements from the MLS and the MIPAS/Envisat satellite instruments. The pronounced modelled water enhancement below the icy particle layer and its decrease during the SPE are not observed by the satellite instruments. At altitudes >85 km the satellite measurements show an increase of H 2 O during the SPE in qualitative agreement with the model predictions. The discrepancies between model H 2 O and observations at lower altitudes might be attributed to the one-dimensional model approach which in particular neglects inhomogeneities and horizontal transport processes. Additionally, it is revealed that the water depletion due to reactions of proton hydrates during the considered solar particle event has only a minor impact on the icy particles.