A Multimodel Investigation of Asian Summer Monsoon UTLS Transport Over the Western Pacific
A Multimodel Investigation of Asian Summer Monsoon UTLS Transport Over the Western Pacific
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DOI：
10.1029/2022jd037511
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发表时间：
2022-12
期刊：
影响因子：
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通讯作者：
L. Pan;D. Kinnison;Q. Liang;M. Chin;M. Santee;J. Flemming;Warren P. Smith;S. Honomichl;J. Bresch;L. Lait;Yunqian Zhu;S. Tilmes;P. Colarco;J. Warner;Adrien Vuvan;C. Clerbaux;E. Atlas;P. Newman;T. Thornberry;W. Randel;O. B. Toon
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文献类型：
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作者：
L. Pan;D. Kinnison;Q. Liang;M. Chin;M. Santee;J. Flemming;Warren P. Smith;S. Honomichl;J. Bresch;L. Lait;Yunqian Zhu;S. Tilmes;P. Colarco;J. Warner;Adrien Vuvan;C. Clerbaux;E. Atlas;P. Newman;T. Thornberry;W. Randel;O. B. Toon
利用一套模式研究了亚洲夏季风（ASM）作为一个化学输送系统，为西太平洋上空的空中实地活动做准备。结果表明，对流层上部反气旋涡旋脱落的动力过程将对流抬升的亚洲边界层气团迅速输送到西太平洋对流层上部和平流层下部。这些模型表明，被输送的空气质量中含有显著增强的气溶胶含量和与臭氧化学有关的痕量气体的复杂化学混合物。化学预报模型一致地预测了脱落事件的发生，但预测的痕量气体和气溶胶的浓度在模型之间往往不同。在实地活动中获得的空中测量结果预计将有助于减少模型的不确定性。此外，季风系统的大尺度季节化学结构是从模拟的一氧化碳中获得的，一氧化碳是污染物对流输送的示踪剂，这为ASM环流提供了一个新的视角，补充了季风的动力学特征。
The Asian summer monsoon (ASM) as a chemical transport system is investigated using a suite of models in preparation for an airborne field campaign over the Western Pacific. Results show that the dynamical process of anticyclone eddy shedding in the upper troposphere rapidly transports convectively uplifted Asian boundary layer air masses to the upper troposphere and lower stratosphere over the Western Pacific. The models show that the transported air masses contain significantly enhanced aerosol loading and a complex chemical mixture of trace gases that are relevant to ozone chemistry. The chemical forecast models consistently predict the occurrence of the shedding events, but the predicted concentrations of transported trace gases and aerosols often differ between models. The airborne measurements to be obtained in the field campaign are expected to help reduce the model uncertainties. Furthermore, the large‐scale seasonal chemical structure of the monsoon system is obtained from modeled carbon monoxide, a tracer of the convective transport of pollutants, which provides a new perspective of the ASM circulation, complementing the dynamical characterization of the monsoon.