Synoptic‐scale behavior of the extratropical tropopause inversion layer
Synoptic‐scale behavior of the extratropical tropopause inversion layer
复制标题
温带对流层顶逆温层的天气尺度行为
DOI：
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
K. Bumke
中科院分区：
文献类型：
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作者：
Robin Pilch Kedzierski;K. Matthes;K. Bumke
COSMIC卫星使命（2007-2013）的高分辨率GPS无线电掩星温度廓线被用来获取对流层顶外逆温层（TIL）强度的每日快照。它的水平结构和逐日变化与近对流层顶的天气形势有关。通过将相对涡度分离为旋度项和切变项，研究了气旋和反气旋条件下TIL的强度。分析表明，TIL具有较高的纬向变率，其强度在对流层顶附近随天气形势的变化而瞬时调整。我们的关键发现是，在中纬度脊在冬季的TIL一样强，或更强的TIL在极地夏季。在反气旋条件下，最强的TIL与切变项有关，而在气旋条件下，较弱的TIL则由旋度项增强。
High‐resolution GPS radio occultation temperature profiles from the COSMIC satellite mission (2007–2013) are used to obtain daily snapshots of the strength of the extratropical tropopause inversion layer (TIL). Its horizontal structure and day‐to‐day variability are linked to the synoptic situation at near‐tropopause level. The strength of the TIL in cyclonic as well as anticyclonic conditions is investigated by separating relative vorticity into curl and shear terms. The analysis shows that the TIL has high zonal variability, and its strength is instantaneously adjusted to the synoptic situation at near‐tropopause level. Our key finding is that the TIL within midlatitude ridges in winter is as strong as or stronger than the TIL in polar summer. The strongest TIL in anticyclonic conditions is related to the shear term, while the weaker TIL in cyclonic conditions is enhanced by the curl term.
惯性重力波能否持续改变对流层顶逆温层？
影响因子：
5.2
作者：
Kunkel
通讯作者：
Kunkel