caa a22 4500 605546800 CHVBK 20210128100942.0 cr unu---uuuuu 210128e20150301xx s 000 0 eng 10.1007/s10236-014-0795-5 doi (NATIONALLICENCE)springer-10.1007/s10236-014-0795-5 The East Asian Summer Monsoon in pacemaker experiments driven by ENSO [Elektronische Daten] [Hui Ding, Richard Greatbatch, Jian Lu, Ben Cash] The variability of the East Asian summer monsoon (EASM) is studied using a pacemaker technique driven by ENSO in an atmospheric general circulation model (AGCM) coupled to a slab mixed layer model. In the pacemaker experiments, sea surface temperature (SST) is constrained to observations in the eastern equatorial Pacific through a q-flux that measures the contribution of ocean dynamics to SST variability, while the AGCM is coupled to the slab model. An ensemble of pacemaker experiments is analyzed using a multivariate EOF analysis to identify the two major modes of variability of the EASM. The results show that the pacemaker experiments simulate a substantial amount (around 45 %) of the variability of the first mode (the Pacific-Japan pattern) in ERA40 from 1979 to 1999. Different from previous work, the pacemaker experiments also simulate a large part (25 %) of the variability of the second mode, related to rainfall variability over northern China. Furthermore, we find that the lower (850 hPa) and the upper (200 hPa) tropospheric circulation of the first mode display the same degree of reproducibility whereas only the lower part of the second mode is reproducible. The basis for the success of the pacemaker experiments is the ability of the experiments to reproduce the observed relationship between El Niño Southern Oscillation (ENSO) and the EASM. Springer-Verlag Berlin Heidelberg (outside the USA), 2014 East Asian Summer Monsoon nationallicence Pacemaker nationallicence ENSO nationallicence Ding Hui GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany aut Greatbatch Richard GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany aut Lu Jian Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, WA, USA aut Cash Ben Center for Ocean-Land-Atmosphere Studies, Institute of Global Environment and Society, Calverton, Maryland, USA aut Ocean Dynamics Springer Berlin Heidelberg 65/3(2015-03-01), 385-393 1616-7341 65:3<385 2015 65 10236 https://doi.org/10.1007/s10236-014-0795-5 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/s10236-014-0795-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ding Hui GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany aut NATIONALLICENCE 700 1- Greatbatch Richard GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany aut NATIONALLICENCE 700 1- Lu Jian Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, WA, USA aut NATIONALLICENCE 700 1- Cash Ben Center for Ocean-Land-Atmosphere Studies, Institute of Global Environment and Society, Calverton, Maryland, USA aut NATIONALLICENCE 773 0- Ocean Dynamics Springer Berlin Heidelberg 65/3(2015-03-01), 385-393 1616-7341 65:3<385 2015 65 10236