Orbitally driven east–west antiphasing of South American precipitation

Cruz, F. W.; Vuille, Mathias; Burns, Stephen J.; Wang, Xiangfeng; Cheng, Hai; Werner, Martin; Edwards, R. Lawrence; Karmann, Ivo; Auler, Augusto S.; Nguyen, Hanh

doi:10.1038/ngeo444

Cited by 320 publications

(452 citation statements)

References 27 publications

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“…Precipitation north of the equator was anti-phased with that farther south (Peterson et al, 2000). However, precipitation variation was also anti-phased between the western Amazon and eastern Amazon/Nordeste of Brazil (Cruz et al, 2009;Cheng et al, 2013). The spatial patterns of millennial moisture changes were different from those at precessional scales: whereas northern hemisphere cold events were dry in northern South America, the tropics south of the equator were wet (no evidence of an east-west dipole) (Peterson et al, 2000;Cruz et al, 2005;Wang et al, 2006;Fritz et al, 2010;Kanner et al, 2012;Mosblech et al, 2012;Cheng et al, 2013).…”

Section: Geological Problemmentioning

confidence: 82%

The emerging field of geogenomics: Constraining geological problems with genetic data

Baker

Fritz

Dick³

et al. 2014

Earth-Science Reviews

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The development of a genomics-derived discipline within geology is timely, as a result of major advances in acquiring and processing geologically relevant genetic data. This paper articulates the emerging field of "geogenomics," which involves the use of large-scale genetic data to constrain geological hypotheses. The paper introduces geogenomics and discusses how hypotheses can be addressed through collaboration between geologists and evolutionary biologists. As an example, geogenomic methods are applied to evaluate competing hypotheses regarding the timing of the Andean uplift, the closure of the Isthmus of Panama, the onset of trans-Amazon drainage, and Quaternary climate variation in the Neotropics.

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Section: Geological Problemmentioning

confidence: 82%

The emerging field of geogenomics: Constraining geological problems with genetic data

Baker

Fritz

Dick³

et al. 2014

Earth-Science Reviews

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“…A C C E P T E D M A N U S C R I P T (SACZ) from the South (Silvia- Dias et al, 2009), producing more precipitation in this zone while the rest of the SAMS zone was drier (Valdes, 2000;Cruz et al, 2009;Silva Dias et al, 2009;Cheng et al, 2013 support this pattern by simulating the amount effect, as well as the link to insolation-driven monsoon activity (Cruz et al, 2009). …”

Section: Accepted Manuscriptmentioning

confidence: 91%

“…For instance, in North-Africa, Holocene paleogroundwaters present a mean d-excess of about 5‰ lower than modern precipitations, related to higher RH over moisture source (colder conditions) during that period (Rozanski, 1985). This suggests that the dexcess-shift observed between shallow (modern) and deep (Early-Mid Holocene) groundwater in Recife cannot be attributed to the only increase of rainfall amount and insolation/temperature decreases (Stute et al,1995;Cruz et al, 2009;Chatton et al, 2016) which should favor depleted δ 18 O, δ 2 H (amount and temperature effects, Clar and Fritz, 1997), higher regional RH and therefore lower d-excess, and suggests that additional processes altering moisture sources occurred between the Early-Mid Holocene and the present day.…”

Section: Accepted Manuscriptmentioning

confidence: 91%

“…The major driver of the SAMS circulation is the land-sea temperature gradient (Vera et al, 2006;Marengo et al, 2012;Cruz et al, 2009;Prado et al, 2013a;. During the Early-Mid Holocene, lower austral insolation in the Southern…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…Although calibration (against modern hydrometeorological data) and corrections (of long-term isotopic effects on moisture sources) are still discussed (Baker and Fritz, 2015;Moquet et al, 2016), these proxies are relevant, in term of time resolution, for detailed multidecadal and millenial variations of the SASM over the Nordeste (Cruz et al, 2009;Novello et al, 2012;Cheng et al, 2013), and contributed to describe the large scale drivers of SASM changes during the Holocene and the complexity of their interactions.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

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Groundwater isotopic data as potential proxy for Holocene paleohydroclimatic and paleoecological models in NE Brazil

Bertrand

Hirata

Auler

et al. 2017

Palaeogeography, Palaeoclimatology, Palaeoecology

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. we hypothesize that the groundwater moisture sources was heavily recycled. Such a hypothesis would be consistent with the presence of a rainforest-type ecosystem, similar to the present Amazonian forest, in the currently arid NE Brazil. These observations highlight the potential added value of the groundwater isotopes proxy to discuss the interrelationships of paleohydrological and paleoecological patterns during the Early-Mid Holocene. These new proxies might allow the spatio-temporal extent of the above-mentioned ecological corridors to be discussed. A C C E P T E D M A N U S C R I P T

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Oxygen isotopes in tree rings record variation in precipitation δ¹⁸O and amount effects in the south of Mexico

et al. 2013

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[1] Natural archives of oxygen isotopes in precipitation may be used to study changes in the hydrological cycle in the tropics, but their interpretation is not straightforward. We studied to which degree tree rings of Mimosa acantholoba from southern Mexico record variation in isotopic composition of precipitation and which climatic processes influence oxygen isotopes in tree rings (δ18Otr). Interannual variation in δ18Otr was highly synchronized between trees and closely related to isotopic composition of rain measured at San Salvador, 710 km to the southwest. Correlations with δ13C, growth, or local climate variables (temperature, cloud cover, vapor pressure deficit (VPD)) were relatively low, indicating weak plant physiological influences. Interannual variation in δ18Otr correlated negatively with local rainfall amount and intensity. Correlations with the amount of precipitation extended along a 1000 km long stretch of the Pacific Central American coast, probably as a result of organized storm systems uniformly affecting rainfall in the region and its isotope signal; episodic heavy precipitation events, of which some are related to cyclones, deposit strongly 18O-depleted rain in the region and seem to have affected the δ18Otr signal. Large-scale controls on the isotope signature include variation in sea surface temperatures of tropical north Atlantic and Pacific Ocean. In conclusion, we show that δ18Otr of M. acantholoba can be used as a proxy for source water δ18O and that interannual variation in δ18Oprec is caused by a regional amount effect. This contrasts with δ18O signatures at continental sites where cumulative rainout processes dominate and thus provide a proxy for precipitation integrated over a much larger scale. Our results confirm that processes influencing climate-isotope relations differ between sites located, e.g., in the western Amazon versus coastal Mexico, and that tree ring isotope records can help in disentangling the processes influencing precipitation δ18O.

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Orbitally driven east–west antiphasing of South American precipitation

Cited by 320 publications

References 27 publications

The emerging field of geogenomics: Constraining geological problems with genetic data

The emerging field of geogenomics: Constraining geological problems with genetic data

Groundwater isotopic data as potential proxy for Holocene paleohydroclimatic and paleoecological models in NE Brazil

Oxygen isotopes in tree rings record variation in precipitation δ¹⁸O and amount effects in the south of Mexico

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Orbitally driven east–west antiphasing of South American precipitation

Cited by 320 publications

References 27 publications

The emerging field of geogenomics: Constraining geological problems with genetic data

The emerging field of geogenomics: Constraining geological problems with genetic data

Groundwater isotopic data as potential proxy for Holocene paleohydroclimatic and paleoecological models in NE Brazil

Oxygen isotopes in tree rings record variation in precipitation δ18O and amount effects in the south of Mexico

Contact Info

Product

Resources

About

Oxygen isotopes in tree rings record variation in precipitation δ¹⁸O and amount effects in the south of Mexico