caa a22 4500 605471045 CHVBK 20210128100331.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s00382-014-2362-7 doi (NATIONALLICENCE)springer-10.1007/s00382-014-2362-7 Out-of-phase relationship between tropical cyclones generated locally in the South China Sea and non-locally from the Northwest Pacific Ocean [Elektronische Daten] [Zheng Ling, Guihua Wang, Chunzai Wang] Tropical cyclones (TCs) in the South China Sea (SCS) are either generated locally or formed non-locally in the Northwest Pacific Ocean (NWP) and entered into the SCS. Here, it is found that local TCs vary out-of-phase with non-local TCs in summer. That is, if fewer (more) TCs enter into the SCS from the NWP, more (fewer) TCs are generated over the SCS. Further analyses show that variability of the western Pacific subtropical high (WPSH) is responsible for the out-of-phase relationship. As the WPSH shifts eastward (westward), fewer (more) non-local TCs formed in the NWP can enter into the SCS because TCs are recurved northward (moved westward). Due to the eastward (westward) movement of the WPSH, positive (negative) low-level vorticity anomalies, weak (strong) vertical wind shear between the upper and lower troposphere, and anomalous upward (downward) motion in the middle troposphere are induced in the northern SCS. The changes in the relative vorticity, vertical wind shear and vertical velocity are favorable (unfavorable) for the local TC genesis in the SCS. These variations of non-local and local TCs result in an out-of-phase relationship between TCs formed locally in the SCS and non-locally in the NWP. Springer-Verlag Berlin Heidelberg, 2014 Tropical cyclone nationallicence South China Sea nationallicence Northwest Pacific nationallicence Out-of-phase relationship nationallicence Western Pacific subtropical high nationallicence Ling Zheng State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou, China aut Wang Guihua State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou, China aut Wang Chunzai Physical Oceanography Division, NOAA/Atlantic Oceanographic and Meteorological Laboratory, Miami, FL, USA aut Climate Dynamics Springer Berlin Heidelberg 45/3-4(2015-08-01), 1129-1136 0930-7575 45:3-4<1129 2015 45 382 https://doi.org/10.1007/s00382-014-2362-7 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/s00382-014-2362-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ling Zheng State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou, China aut NATIONALLICENCE 700 1- Wang Guihua State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou, China aut NATIONALLICENCE 700 1- Wang Chunzai Physical Oceanography Division, NOAA/Atlantic Oceanographic and Meteorological Laboratory, Miami, FL, USA aut NATIONALLICENCE 773 0- Climate Dynamics Springer Berlin Heidelberg 45/3-4(2015-08-01), 1129-1136 0930-7575 45:3-4<1129 2015 45 382