In situ detection of stratosphere‐troposphere exchange of cirrus particles in the midlatitudes
In situ detection of stratosphere‐troposphere exchange of cirrus particles in the midlatitudes
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DOI：
10.1002/2014gl062556
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发表时间：
2015-02
影响因子：
5.2
通讯作者：
Stefan E. Müller;P. Hoor;F. Berkes;H. Bozem;M. Klingebiel;P. Reutter;Herman G. J. Smit;M. Wendisch;P. Spichtinger;S. Borrmann
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文献类型：
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作者：
Stefan E. Müller;P. Hoor;F. Berkes;H. Bozem;M. Klingebiel;P. Reutter;Herman G. J. Smit;M. Wendisch;P. Spichtinger;S. Borrmann
2013年，在北方德国上空进行的AIRcraft拖曳传感器航天飞机非均匀卷云实验期间，进行了空气痕量气体、微物理和辐射测量。基于高精度的一氧化二氮（N2 O）和一氧化碳（CO）的现场数据，可以识别出含有卷云颗粒的平流层空气。与平流层N2 O数据一致，向后的轨迹表明，采样的空气质量在测量前的最后3小时穿过动力对流层顶。这些气团含有卷云粒子，它们是在对流层缓慢上升过程中形成的，随后与平流层空气混合。从CO-N2 O相关性推导出这种传输的不可逆性。据我们所知，这是第一次在中纬度地区现场探测到卷云颗粒与平流层空气的混合。
Airborne trace gas, microphysical, and radiation measurements were performed during the AIRcraft TOwed Sensor Shuttle ‐ Inhomogeneous Cirrus Experiment over northern Germany in 2013. Based on high‐precision nitrous oxide (N2O) and carbon monoxide (CO) in situ data, stratospheric air could be identified, which contained cirrus cloud particles. Consistent with the stratospheric N2O data, backward trajectories indicate that the sampled air masses crossed the dynamical tropopause in the last 3 h before the measurement. These air masses contained cirrus particles, which were formed during slow ascent in the troposphere and subsequently mixed with stratospheric air. From the CO‐N2O correlation the irreversibility of this transport is deduced. To our knowledge, this is the first in situ detection of cirrus particles mixed with stratospheric air in the midlatitudes.