Author:
Cen Sixian,Chen Wen,Chen Shangfeng,Liu Yuyun,Ma Tianjiao
Abstract
AbstractIt is well recognized that the zonal shift in the South Asian High (SAH) has pronounced influences on weather and climate anomalies over surrounding and teleconnected regions. Hence, it is of great importance to investigate the factors related to the interannual variation in the zonal location of the SAH. This study indicates that the anomalous atmospheric apparent heat source (<Q1>) around East Europe has a close relationship with the interannual variation in the SAH zonal shift during boreal summer. In particular, when above (below) normal <Q1> exists, the SAH tends to shift westward (eastward). Above-normal <Q1> over East Europe can trigger an eastward propagating wave train along the subtropical jet stream, resembling the negative phase of the Silk Road teleconnection pattern, with positive geopotential height anomalies around the Iranian Plateau and Northeast Asia and negative anomalies around East Europe and the Tibetan Plateau, which could lead to a westward shift in the SAH. Our model experiments confirm that anomalous <Q1> around East Europe can exert pronounced impacts on the zonal shift in the SAH by inducing an eastward propagating atmospheric wave train.
Publisher
Springer Science and Business Media LLC
Reference58 articles.
1. Mason, R. B. & &, C. E. Anderson. The development and decay of the 1oomb summertime anticyclone over southern Asia. Mon. Weather Rev. 91, 3–12 (1963).
2. Tao, S. Y. & Zhu, F. K. The 100-mb flow patterns in southern Asia in summer and its relation to the advance and retreat of the West-Pacific subtropical anticyclone over the Far East. Acta Meteorologica Sinica 34, 385–396 (1964).
3. Liu, B. Q., Wu, G. X., Mao, J. Y. & He, J. H. Genesis of the south Asian high and its Impact on the Asian summer monsoon onset. J. Clim. 26, 2976–2991, https://doi.org/10.1175/JCLI-D-12-00286.1 (2013).
4. Ge, J., You, Q. L. & Zhang, Y. Q. The influence of the Asian summer monsoon onset on the northward movement of the South Asian High towards the Tibetan Plateau and its thermodynamic mechanism. Int. J. Clim. 38, 543–553, https://doi.org/10.1002/joc.5192 (2018).
5. Ge, J., You, Q. L. & Zhang, Y. Q. Interannual variation of the northward movement of the South Asian High towards the Tibetan Plateau and its relation to the Asian Summer Monsoon onset. Atmos. Res. 213, 381–388, https://doi.org/10.1016/j.atmosres.2018.06.026 (2018).
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