@Article{ShimizuSampVenāMaks:2020:SeChSo,
author = "Shimizu, Mar{\'{\i}}lia Harumi and Sampaio, Gilvan and
Ven{\^a}ncio, Igor Martins and Maksic, Jelena",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)}",
title = "Seasonal changes of the South American monsoon system during the
Mid\‑Holocene in the CMIP5 simulations",
journal = "Climate Dynamics",
year = "2020",
volume = "54",
number = "5/6",
pages = "2697--2712",
month = "Mar.",
keywords = "South American monsoon system, Mid-Holocene, CMIP5, Climate
change.",
abstract = "The South American Monsoon System (SAMS) is a major climatic
feature of South America, and its domain extends from Amazon to La
Plata basin. The SAMS region is vulnerable to variations of
climate and precipitation patterns, which could impact economic
activities and lead to potential societal consequences. In the
face of a warming future scenario, the importance of the study of
the past climate with numerical simulations is to evaluate the
climate models and to assure the reliability of future
projections. Here we investigate the Mid-Holocene SAMS, evaluating
changes in strength, life cycle and associated dynamical
mechanisms in ten Earth System Models simulations. Our results
show that the SAMS was weaker in the Mid-Holocene than in the
pre-industrial climate in December-January-February (DJF), but
stronger in September-October-November (SON). This is probably a
consequence of insolation variations in the Mid-Holocene, which
contributed to changes in the moisture flux from the Atlantic
Ocean to the continent, the strength of the upper-level
atmospheric circulation, and the amount of precipitation over the
SAMS region. Moreover, we suggest that the life cycle of the SAMS
was altered during the Mid-Holocene, with an earlier onset and
demise. Our results also indicate that Mid-Holocene SAMS changes
are connected to precipitation variations near Northeast Brazil,
in a dipole configuration of precipitation between western Amazon
and Northeast Brazil, due to the influence of the Walker cell.
Finally, this study highlights a need for improvement of the
numerical models to better simulate the amount of precipitation
over South America and the upper-level circulation over western
Amazon in SON, which are crucial factors for a more realistic
representation of the SAMS.",
doi = "10.1007/s00382-020-05137-1",
url = "http://dx.doi.org/10.1007/s00382-020-05137-1",
issn = "0930-7575",
language = "en",
targetfile = "shimizu_seasonal.pdf",
urlaccessdate = "23 abr. 2024"
}