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Kim, D., Lee, S. - K., Lopez, H., Foltz, G. R., Misra, V., & Kumar, A. (2020). On the Role of Pacific-Atlantic SST Contrast and Associated Caribbean Sea Convection in August-October U.S. Regional Rainfall Variability. Geophys. Res. Lett., 47(11).
Abstract: This study investigates the large‐scale atmospheric processes that lead to U.S. precipitation variability in late summer to midfall (August–October; ASO) and shows that the well‐recognized relationship between North Atlantic Subtropical High and U.S. precipitation in peak summer (June–August) significantly weakens in ASO. The working hypothesis derived from our analysis is that in ASO convective activity in the Caribbean Sea, modulated by the tropical Pacific‐Atlantic sea surface temperature (SST) anomaly contrast, directly influences the North American Low‐Level Jet and thus U.S. precipitation east of the Rockies, through a Gill‐type response. This hypothesis derived from observations is strongly supported by a long‐term climate model simulation and by a linear baroclinic atmospheric model with prescribed diabatic forcings in the Caribbean Sea. This study integrates key findings from previous studies and advances a consistent physical rationale that links the Pacific‐Atlantic SST anomaly contrast, Caribbean Sea convective activity, and U.S. rainfall in ASO.
Keywords: Pacific‐ Atlantic SST interaction; Atlantic Warm pool; Caribbean Sea; U.S. precipitation
|Kozar, M. E., & Misra, V. (2013). Evaluation of twentieth-century Atlantic Warm Pool simulations in historical CMIP5 runs. Clim Dyn, 41(9-10), 2375–2391.|
|Misra, V., Groenen, D., Bhardwaj, A., & Mishra, A. (2016). The warm pool variability of the tropical northeast Pacific. Int. J. Climatol., 36(14), 4625–4637.|
|Misra, V., Mishra, A., & Li, H. (2016). The sensitivity of the regional coupled ocean-atmosphere simulations over the Intra-Americas seas to the prescribed bathymetry. Dynamics of Atmospheres and Oceans, 76, 29–51.|
|Misra, V., Stroman, A., & DiNapoli, S. (2013). The rendition of the Atlantic Warm Pool in the reanalyses. Clim Dyn, 41(2), 517–532.|
|Moeller, L. (2011). Low-Frequency Variations of the Sea Breeze in Florida. Master's thesis, Florida State University, Tallahassee, FL.|
|Nagamani, P. V., Ali, M. M., Goni, G. J., Udaya Bhaskar, T. V. S., McCreary, J. P., Weller, R. A., et al. (2016). Heat content of the Arabian Sea Mini Warm Pool is increasing. Atmos. Sci. Lett., 17(1), 39–42.|
|Nyadjro, E. S., Subrahmanyam, B., Murty, V. S. N., & Shriver, J. F. (2012). The role of salinity on the dynamics of the Arabian Sea mini warm pool. J. Geophys. Res., 117(C9), n/a-n/a.|