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| Dutheil, Cyril; Bador, M.; Lengaigne, M.; Lefèvre, J.; Jourdain, N. C.; Vialard, J.; Jullien, Swen; Peltier, A.; Menkes, C.. |
| The South Pacific Convergence Zone (SPCZ) is poorly represented in global coupled simulations from the Coupled Model Intercomparison Project Phase 5 (CMIP5), with trademark biases such as the tendency to form a “double Intertropical convergence zone” and an equatorial cold tongue that extends too far westward. Such biases limit our confidence in projections of the future climate change for this region. In this study, we use a downscaling strategy based on a regional atmospheric general circulation model that accurately captures the SPCZ present-day climatology and interannual variability. More specifically, we investigate the sensitivity of the projected rainfall response to either just correcting present-day CMIP5 Sea Surface Temperature (SST) biases or... |
| Tipo: Text |
Palavras-chave: Regional climate models; South Pacific Convergence Zone; Precipitation; Sea Surface Temperature. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00484/59603/62636.pdf |
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| Somot, Samuel; Houpert, Loic; Sevault, Florence; Testor, Pierre; Bosse, Anthony; Taupier-letage, Isabelle; Bouin, Marie-noelle; Waldman, Robin; Cassou, Christophe; Sanchez-gomez, Emilia; Durrieu De Madron, Xavier; Adloff, Fanny; Nabat, Pierre; Herrmann, Marine. |
| Observing, modelling and understanding the climate-scale variability of the deep water formation (DWF) in the North-Western Mediterranean Sea remains today very challenging. In this study, we first characterize the interannual variability of this phenomenon by a thorough reanalysis of observations in order to establish reference time series. These quantitative indicators include 31 observed years for the yearly maximum mixed layer depth over the period 1980–2013 and a detailed multi-indicator description of the period 2007–2013. Then a 1980–2013 hindcast simulation is performed with a fully-coupled regional climate system model including the high-resolution representation of the regional atmosphere, ocean, land-surface and rivers. The simulation reproduces... |
| Tipo: Text |
Palavras-chave: Deep water formation; Open-sea deep convection; Interannual variability; Mediterranean Sea; Regional climate models; Climate trends. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00348/45948/45654.pdf |
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