caa a22 4500 605471525 CHVBK 20210128100333.0 cr unu---uuuuu 210128e20151001xx s 000 0 eng 10.1007/s00382-014-2427-7 doi (NATIONALLICENCE)springer-10.1007/s00382-014-2427-7 Zonal movement of the Mascarene High in austral summer [Elektronische Daten] [Shun Ohishi, Shusaku Sugimoto, Kimio Hanawa] Temporal variations in the Mascarene High (MH), defined by the sea level pressure (SLP) maximum within the region of [40°-120°E, 50°-10°S] in austral summer (November-January), were investigated using atmospheric reanalysis datasets. The MH longitudinal position has a dominant timescale at about 6years, which appears to be independent of the MH intensity variation. The MH longitudinal movement is caused by a combination of SLP variations in the eastern South Indian Ocean (ESIO) and in the western South Indian Ocean (WSIO), as follows. (1) Pressure variations in the ESIO region are confined to the lower atmosphere up to the mid-troposphere, and are associated with the El Niño-Southern Oscillation events. (2) Pressure variations in the WSIO region, characterized by a quasi-barotropic structure throughout the troposphere, are related to the meridional movement of storm track. Sea surface temperature anomalies associated with the longitudinal movement of the MH show a southwest-northeast dipole structure, but this is shifted 10° westward in longitude compared with that associated with the MH intensity. Springer-Verlag Berlin Heidelberg, 2014 Mascarene High nationallicence Indian Ocean Subtropical Dipole nationallicence Southern Annular Mode nationallicence El Niño-Southern Oscillation nationallicence Storm track activity nationallicence Ohishi Shun Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-0033, Tokyo, Japan aut Sugimoto Shusaku Department of Geophysics, Graduate School of Science, Tohoku University, Miyagi, Japan aut Hanawa Kimio Department of Geophysics, Graduate School of Science, Tohoku University, Miyagi, Japan aut Climate Dynamics Springer Berlin Heidelberg 45/7-8(2015-10-01), 1739-1745 0930-7575 45:7-8<1739 2015 45 382 https://doi.org/10.1007/s00382-014-2427-7 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00382-014-2427-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ohishi Shun Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-0033, Tokyo, Japan aut NATIONALLICENCE 700 1- Sugimoto Shusaku Department of Geophysics, Graduate School of Science, Tohoku University, Miyagi, Japan aut NATIONALLICENCE 700 1- Hanawa Kimio Department of Geophysics, Graduate School of Science, Tohoku University, Miyagi, Japan aut NATIONALLICENCE 773 0- Climate Dynamics Springer Berlin Heidelberg 45/7-8(2015-10-01), 1739-1745 0930-7575 45:7-8<1739 2015 45 382