caa a22 4500 605472890 CHVBK 20210128100340.0 cr unu---uuuuu 210128e20151101xx s 000 0 eng 10.1007/s00382-015-2480-x doi (NATIONALLICENCE)springer-10.1007/s00382-015-2480-x The impact of ENSO on Southern African rainfall in CMIP5 ocean atmosphere coupled climate models [Elektronische Daten] [Bastien Dieppois, Mathieu Rouault, Mark New] We study the ability of 24 ocean atmosphere global coupled models from the Coupled Model Intercomparison Project 5 (CMIP5) to reproduce the teleconnections between El Niño Southern Oscillation (ENSO) and Southern African rainfall in austral summer using historical forced simulations, with a focus on the atmospheric dynamic associated with El Niño. Overestimations of summer rainfall occur over Southern Africa in all CMIP5 models. Abnormal westward extensions of ENSO patterns are a common feature of all CMIP5 models, while the warming of the Indian Ocean that happens during El Niño is not correctly reproduced. This could impact the teleconnection between ENSO and Southern African rainfall which is represented with mixed success in CMIP5 models. Large-scale anomalies of suppressed deep-convection over the tropical maritime continent and enhanced convection from the central to eastern Pacific are correctly simulated. However, regional biases occur above Africa and the Indian Ocean, particularly in the position of the deep convection anomalies associated with El Niño, which can lead to the wrong sign in rainfall anomalies in the northwest part of South Africa. From the near-surface to mid-troposphere, CMIP5 models underestimate the observed anomalous pattern of pressure occurring over Southern Africa that leads to dry conditions during El Niño years. Springer-Verlag Berlin Heidelberg, 2015 Southern Africa nationallicence Rainfall nationallicence El Niño Southern Oscillation (ENSO) nationallicence Coupled model nationallicence CMIP5 nationallicence Teleconnection nationallicence Dieppois Bastien African Climate and Development Initiative, University of Cape Town, Cape Town, RSA aut Rouault Mathieu Department of Oceanography, MARE Institute, University of Cape Town, Cape Town, RSA aut New Mark African Climate and Development Initiative, University of Cape Town, Cape Town, RSA aut Climate Dynamics Springer Berlin Heidelberg 45/9-10(2015-11-01), 2425-2442 0930-7575 45:9-10<2425 2015 45 382 https://doi.org/10.1007/s00382-015-2480-x 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/s00382-015-2480-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Dieppois Bastien African Climate and Development Initiative, University of Cape Town, Cape Town, RSA aut NATIONALLICENCE 700 1- Rouault Mathieu Department of Oceanography, MARE Institute, University of Cape Town, Cape Town, RSA aut NATIONALLICENCE 700 1- New Mark African Climate and Development Initiative, University of Cape Town, Cape Town, RSA aut NATIONALLICENCE 773 0- Climate Dynamics Springer Berlin Heidelberg 45/9-10(2015-11-01), 2425-2442 0930-7575 45:9-10<2425 2015 45 382