caa a22 4500 605473463 CHVBK 20210128100343.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s00382-014-2268-4 doi (NATIONALLICENCE)springer-10.1007/s00382-014-2268-4 Thermodynamic characteristics and responses to ENSO of dominant intraseasonal modes in the East Asian summer monsoon [Elektronische Daten] [Hyoeun Oh, Kyung-Ja Ha] The moisture supply and El Niño Southern Oscillation (ENSO) characteristics are investigated for different intraseasonal modes of the East Asian summer monsoon (EASM) identified as the Meiyu-Baiu, Changma, post-Changma, and dry-spell modes. The investigation is conducted with a type of artificial neural network known as self-organizing map analysis. The major modes tend to be dominated by the moisture convergence of the moisture budget equation along the rain-band. The Meiyu-Baiu mode is strongly linked to both the anomalouslow-level convergence and vertical wind shear, which is related to baroclinic instability with warm air rising and cold air sinking. The Changma mode has a strengthened tropic-subtropics connection along the western north Pacific subtropical high, which induces vertical destabilization and strong convective instability by the low-level warm advection of moisture-laden air and upper-level cold advection ofdry air. In late summer, the post-Changma and dry-spell modes are characterized by anomalous southeasterly flow of warm and moist air from western north Pacific monsoon, and low-level easterly flow, respectively. In response to the preceding El Niño, the Meiyu-Baiu and Changma modes occur more frequently, while the post-Changma and dry-spell modes show the opposite. The response to the La Niña exhibits a relatively weak connection, indicating asymmetric response on the preceding ENSO. This prominent difference in response to the ENSO leads to different behaviors of the Indian Ocean and western Pacific thermal state, and consequently, the distinct moisture supply and instability variations for the EASM intraseasonal modes. The Author(s), 2014 Intraseasonal mode nationallicence East Asian summer monsoon nationallicence Meiyu-Baiu nationallicence Changma nationallicence Western north Pacific subtropical high nationallicence ENSO nationallicence SOM nationallicence Oh Hyoeun Division of Earth Environmental System, Pusan National University, Busan, Korea aut Ha Kyung-Ja Division of Earth Environmental System, Pusan National University, Busan, Korea aut Climate Dynamics Springer Berlin Heidelberg 44/7-8(2015-04-01), 1751-1766 0930-7575 44:7-8<1751 2015 44 382 https://doi.org/10.1007/s00382-014-2268-4 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/s00382-014-2268-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Oh Hyoeun Division of Earth Environmental System, Pusan National University, Busan, Korea aut NATIONALLICENCE 700 1- Ha Kyung-Ja Division of Earth Environmental System, Pusan National University, Busan, Korea aut NATIONALLICENCE 773 0- Climate Dynamics Springer Berlin Heidelberg 44/7-8(2015-04-01), 1751-1766 0930-7575 44:7-8<1751 2015 44 382