The effects of mid-Holocene fluvio-eolian interplay and coastal dynamics on the formation of dune-dammed lakes in NE Brazil

Zular, André; Utida, Giselle; Cruz, F. W.; Sawakuchi, André Oliveira; Wang, Hong; Bı́cego, Márcia Caruso; Giannini, Paulo César Fonseca; Rodrigues, Selma Isabel; Garcia, Guilherme Pereira Bento; Vuille, Mathias; Sifeddine, Abdelfettah; Zocatelli, Renata; Turcq, Bruno; Mendes, Vinícius Ribau

doi:10.1016/j.quascirev.2018.07.022

Cited by 18 publications

(18 citation statements)

References 83 publications

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“…Indeed, a record spanning the last 2.3 kyr is unable to record the mid-to late Holocene changes we are interested in since these changes were mostly complete before 2.5 cal ka BP (Figures 6b-6d). Records from Caçó Lake (coastal northern NE Brazil) despite suggesting a subtle drying trend throughout the Holocene (Jacob et al, 2007) may as well be influenced by eolian and fluvial sedimentary dynamics (Guedes et al, 2017;Ledru et al, 2001;Sifeddine et al, 2003;Zular et al, 2018). Thus, marine sediment core GeoB16204-2 is the first high temporal resolution hydroclimate record for northern NE Brazil (Table 1) to corroborate the drying trend throughout the mid-to late Holocene suggested by Cruz et al (2009) (Figures 6c and 6d).…”

Section: Changes In Northeastern South American Precipitation During the Last Ca 52 Kyrmentioning

confidence: 53%

“…This record stands alone in northern NE Brazil for its length, high temporal resolution, accurate dating and robust climatic significance. Records from Boqueirão Lake (coastal northern NE Brazil), for example, are too short (only spanning the last 2.3 kyr) (Utida et al, 2019) or strongly influenced by eolian and fluvial sedimentary dynamics (Viana et al, 2014;Zocatelli et al, 2012;Zular et al, 2018). Indeed, a record spanning the last 2.3 kyr is unable to record the mid-to late Holocene changes we are interested in since these changes were mostly complete before 2.5 cal ka BP (Figures 6b-6d).…”

Section: Changes In Northeastern South American Precipitation During the Last Ca 52 Kyrmentioning

confidence: 98%

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Mid‐ to Late Holocene Contraction of the Intertropical Convergence Zone Over Northeastern South America

Chiessi

Mulitza

Taniguchi

et al. 2021

Paleoceanog and Paleoclimatol

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Modern rainfall over northeastern (NE) South America is highly sensitive to and strongly controlled by the position of the Intertropical Convergence Zone (ITCZ), that is, the rising limb of the Hadley circulation (meridionally oriented overturning circulation cell) (Hastenrath, 2012;Poveda et al., 2006;Schneider et al., 2014). Today, semi-arid northern NE Brazil receives ca. 50% of its total annual precipitation during March-April, when the ITCZ and the associated equatorial precipitation reach its seasonal southernmost position over NE South America (Figure 1). A suggested mid-to late Holocene southward migration of the Abstract Modern precipitation over northeastern (NE) South America is strongly controlled by the seasonal meridional migration of the Intertropical Convergence Zone (ITCZ). Ample evidence from the Northern Hemisphere suggests a mid-to late Holocene southward migration of the ITCZ. Such a shift would be expected to increase precipitation over semi-arid northern NE Brazil (Southern Hemisphere). However, the most robust precipitation record from northern NE Brazil shows a drying trend throughout the Holocene. Here, we address this issue presenting a high-temporal resolution reconstruction of precipitation over northern NE Brazil based on data from a marine sediment core, together with analyses of mid-and late Holocene simulations performed with the fully coupled climate model FGOALS-s2. Both, our data and the climate model simulations show a decrease in precipitation over northern NE Brazil from the mid-to the late Holocene. The model outputs further indicate a latitudinal contraction of the seasonal migration range of the ITCZ that, together with an intensification of the regional Walker circulation, were responsible for the mid-to late Holocene changes in precipitation over NE South America. Our results reconcile apparently conflicting precipitation records and climate mechanisms used to explain changes in precipitation over NE South America.

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Section: Changes In Northeastern South American Precipitation During the Last Ca 52 Kyrmentioning

confidence: 53%

Section: Changes In Northeastern South American Precipitation During the Last Ca 52 Kyrmentioning

confidence: 98%

Mid‐ to Late Holocene Contraction of the Intertropical Convergence Zone Over Northeastern South America

Chiessi

Mulitza

Taniguchi

et al. 2021

Paleoceanog and Paleoclimatol

View full text Add to dashboard Cite

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“…34 . This inconsistency can be explained by the strong influence of aeolian processes on the Boqueirão Lake level 21 which was not considered in previous studies. Boqueirão is a coastal lake that originated from sand-dune damming of a small freshwater river (Fig.…”

Section: Resultsmentioning

confidence: 78%

“…Boqueirão Lake is a small lake formed by dune blockage with a limited catchment area in coastal sand dune fields under a semi-arid climate in NEB 21 . The adjacent sandy soils to this lake are covered predominantly by a dry forest known as “caatinga”.…”

Section: Introductionmentioning

confidence: 99%

Tropical South Atlantic influence on Northeastern Brazil precipitation and ITCZ displacement during the past 2300 years

Utida

Cruz

Etourneau

et al. 2019

Sci Rep

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103

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Recent paleoclimatic studies suggest that changes in the tropical rainbelt across the Atlantic Ocean during the past two millennia are linked to a latitudinal shift of the Intertropical Convergence Zone (ITCZ) driven by the Northern Hemisphere (NH) climate. However, little is known regarding other potential drivers that can affect tropical Atlantic rainfall, mainly due to the scarcity of adequate and high-resolution records. In this study, we fill this gap by reconstructing precipitation changes in Northeastern Brazil during the last 2,300 years from a high-resolution lake record of hydrogen isotope compositions of plant waxes. We find that regional precipitation along the coastal area of South America was not solely governed by north-south displacements of the ITCZ due to changes in NH climate, but also by the contraction and expansion of the tropical rainbelt due to variations in sea surface temperature and southeast trade winds in the tropical South Atlantic Basin.

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“…However, some studies show that rainfall amount in northeastern and southeastern Brazil are markedly anti-phased during the Holocene (Bernal et al, 2016). Considering that the modern east-west precipitation dipole between northeastern Brazil (dry climate) and the central South American tropics (wet climate) is regulated by the intensity of the South American summer monsoon, the paleoprecipitation history of the Rio Grande do Norte speleothem indicates a "anti-phased'' relationship to the rest of tropical South America (Cheng et al, 2013;Cruz et al, 2009;Zular et al, 2018). According to Smith and Mayle (2018), northeastern Brazil's climate is anti-phased with the rest of tropical South America, but a lack of paleo-data limits our understanding of how vegetation responded to a wetter (drier) Middle (Late) Holocene.…”

Section: Mangroves and Fluvial Dischargementioning

confidence: 99%

Impacts of Holocene and modern sea‐level changes on estuarine mangroves from northeastern Brazil

Cohen

Figueiredo

Oliveira

et al. 2019

Earth Surf Processes Landf

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Projections of the impacts of modern Relative Sea Level (RSL) rise on estuarine mangroves should be supported by coastal topographic data and records of mangrove dynamics under past RSL change. This work identified inland and seaward mangrove migrations along the Jucuruçu River (Bahia, Northeastern Brazil), during the Holocene based on sedimentary features, palynological and geochemical (δ 13 C, δ 15 N, C/N) data integrated with digital elevation models. During the Middle Holocene, in response to RSL rise, the estuary saw mangrove forest establish up to~37 km inland. RSL stood between -1.4 (+0.36/-2.2 m) and +1 (2.19/0.2 m) around 7400 cal yr BP, and rose to a highest position of +3.25 (4.22/2.45 m) reached around 5350 cal yr BP. That marine incursion caused the inland replacement of freshwater vegetation by mangroves on tidal flats. Since then, the estuary experienced RSL fall, reducing inland tidal water salinity towards the Late Holocene, making that the mangroves were replaced by freshwater floodplain vegetation. Today, in the seaward part of the estuary near its mouth, mangroves occupy an area of~10 km 2 along tidal channels. Considering a RSL rise of 98 cm up to the end of the 21 st century, at a rate significantly higher than that of Middle Holocene RSL rise (1.5 mm/yr) and fall (0.6 mm/yr), the current mangrove substrates are expected to drown and/or eroded near the coast, while new mangroves may establish inland, at topographically higher tidal flats in nowadays freshwater-tidal zones. Mangrove area could expand over 13 km 2 of coastal and flood plain. Following the same interaction between RSL/climate changes and Holocene mangrove dynamics, such upstream mangrove migration may be attenuated or intensified by changes in fluvial discharge.

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The effects of mid-Holocene fluvio-eolian interplay and coastal dynamics on the formation of dune-dammed lakes in NE Brazil

Cited by 18 publications

References 83 publications

Mid‐ to Late Holocene Contraction of the Intertropical Convergence Zone Over Northeastern South America

Mid‐ to Late Holocene Contraction of the Intertropical Convergence Zone Over Northeastern South America

Tropical South Atlantic influence on Northeastern Brazil precipitation and ITCZ displacement during the past 2300 years

Impacts of Holocene and modern sea‐level changes on estuarine mangroves from northeastern Brazil

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