Linkage of the South Asian High to the Southern Annular Mode during the Boreal Summer

Abstract:

The linkage of the South Asian High (SAH) to the southern annular mode (SAM) during the boreal summer is addressed. The results show that the SAH correlated well with the Southern Hemispheric subtropical high (SSH) and SAM, which exhibits that their recent positive trends are associated with each other. During the positive SAH anomalies years, roughly speaking, the sea level pressure (SLP) and the zonal surface wind (u10) are analogous to that of the positive SAM phase, but they also show an anomalous zonal-wave-3-like (ZW3-like) pattern over the mid latitudes. The surface temperature (ST) variations are not similar to the SAM. Nevertheless, these changes are related with the anomalous cyclones and meridional surface wind (v10). The relationship between the SAH and SAM is also a manifestation of the interhemispheric interaction, and this study contributes to the understanding of the global change.

• Periodical: Advanced Materials Research (Volumes 962-965)
• Pages: 1404-1409
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.962-965.1404
• Online since: June 2014
• Authors: Jian Zhang*, Yan You Guo, Cheng Shan Wang
• Keywords: Global Change, Interhemispheric Interaction, South Asian High, Southern Annular Mode

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