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**Phase-II: MJO Prediction and Teleconnections** ---- During the second phase of the S2S project, the MJO prediction and teleconnections sub-project will focus on two major tasks: (% style="background-color:#f9f9f9" %) |A. The relationship between the MJO and High Impact Weather in the Tropics and the potential for predictive skill for these events at 2 week – 2 month lead time. This activity will benefit from links developed within the international community through e.g. the S2S Africa sub-project; the Years of Maritime Continent; and the WWRP High Impact Weather Project. (% style="background-color:#f9f9f9" %) |B. Tropical-Extratropical teleconnections associated with the MJO and the potential for extratropical predictive skill associated with the MJO. This activity will benefit from links developed with the Year of Tropical –Mid-latitude Interactions, Teleconnections sub-project, and WGSIP Initiative Interaction/Teleconnection between tropics and extra-tropics, The Year of Polar Prediction Project. These two tasks will be tackled in parallel and research activities to address related questions will be spread over the course of sub-project. Specific questions to address include: ---- **a. How well do operational S2S models capture the observed relationship between the MJO and high impact weather events?** ---- __Current Projects__ __Publications__ === **Advances in the subseasonal prediction of extreme events** === Daniela I.V. Domeisen, Christopher J. White, Hilla Afargan-Gerstman, Ángel G. Muñoz, Matthew A. Janiga, Frédéric Vitart, C. Ole Wulff, Salomé Antoine, Constantin Ardilouze, Lauriane Batté, Hannah C. Bloomfield, David Brayshaw, Suzana J. Camargo, Andrew Charlton-Pérez, Dan Collins, Tim Cowan, Maria del Mar Chaves, Laura Ferranti, Rosario Gómez, Paula L.M. González, Carmen González Romero, Johnna M. Infanti, Stelios Karozis, Hera Kim, Erik W. Kolstad, Emerson LaJoie, Llorenç Lledó, Linus Magnusson, Piero Malguzzi, Andrea Manrique-Suñén, Daniele Mastrangelo, Stefano Materia, Hanoi Medina, Lluís Palma, Luis E. Pineda, Athanasios Sfetsos, Seok-Woo Son, Albert Soret, Sarah Strazzo, Di Tian **Findings**: While extreme weather events are often not predicted in a deterministic sense more than a few days in advance, there is potential for probabilistic sub-seasonal prediction on timescales of several weeks for many extreme events. Here we provide an overview of subseasonal predictability for some of the most prominent extreme events on a global scale: heatwaves, cold spells, heavy precipitation events, and tropical and extratropical cyclones. The Madden-Julian Oscillation provides added predictability for several of these extremes, including cold spells, precipitation extremes, and tropical cyclones. **Status**: Submitted to the Bulletin of the American Meteorological Society [[image:Guigma_heatwaves_1.pdf||width="95%"]] [[image:Guigma_heatwaves_2.pdf||width="90%"]] ---- **b. How does the teleconnections depend on the horizontal, vertical and temporal structure of the diabatic heating anomalies associated with the MJO?** ---- __Current Projects__ __Publications__ * Wang, J., H. Kim, D. Kim, S. A. Henderson, C. Stan, and E. D. Maloney (2020): MJO teleconnections over PNA region in climate models. Part II: Impacts of MJO and basic state. //Journal of Climate//, **33**, 5081-5101, [[doi:10.1175/JCLI-D-19-0865.1 >>url:https://doi.org/10.1175/JCLI-D-19-0865.1]] ---- **c. Metrics for assessment of model teleconnections and diagnosing sources of errors in teleconnections** ---- __Current Projects__ __Publications__ * Wang, J. H. Kim. D. Kim, S. A. Henderson, C.Stan, and E. D. Maloney (2020): MJO teleconnections over PNA region in climate models. Part I: Performance- and process-based skill metrics. //Journal of Climate//, **33**, 1051-1067, [[doi:10.1175/JCLI-D-17-0269.1>>url:https://journals.ametsoc.org/doi/abs/10.1175/JCLI-D-17-0269.1]] * A. M. Jenney, D. A. Randall, E. A. Barnes (2019): Quantifying Regional Sensitivities to Periodic Events: Application to the MJO. //Journal of Geophysical Research//: //Atmospheres, // https://doi.org/10.1029/2018JD029457 [[image:slides s2s_P1.pdf||alt="Quantifying Regional Sensitivities to Periodic Events: Application to the MJO" style="vertical-align: middle;"]] ---- **d. Does the relationship between the MJO and high impact weather events lead to enhanced predictive skill for these events for particular phases of the MJO or whilst there is strong MJO activity?** ---- __Current Projects__ __Publications__ * A. M. Jenney, K. M. Nardi, E. A. Barnes, D. A. Randall (2019): The Seasonality and Regionality of MJO Impacts on North American Temperature, //Geophysical Research Letters//, https://doi.org/10.1029/2019GL083950 [[image:slides s2s_P2.pdf||alt="The Seasonality and Regionality of MJO Impacts on North American Temperature"]] ---- **e. How do variations in the slowly varying background state effect the Rossby wave source and the subsequent Rossby wave propagation from the source region?** ---- __Current Projects__ __Publications__ * R. W. Lee, S. J. Woolnough, A. J. Charlton-Perez, F. Vitart (2019): ENSO modulation of MJO teleconnections to the North Atlantic and Europe. Geophysical Research Letters, https://doi.org/10.1029/2019GL084683 [[image:RobertLee_slide.pdf||alt="ENSO modulation MJO Teleconnections to the North Atlantic and Europe" style="vertical-align: middle;"]] ---- **Interested in joining the group?** To subscribe to the group mailing list, please email to [[subseasonal_to_seasonal_prediction_mjo_tel>>mailto:cstan@gmu.edu]]
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