What are the climate controls on δD in precipitation in the Zongo Valley (Bolivia)? Implications for the Illimani ice core interpretation

Vimeux, Françoise; Gallaire, Robert; Bony, Sandrine; Hoffmann, Georg F.; Chiang, John C. H.

doi:10.1016/j.epsl.2005.09.031

Cited by 175 publications

(214 citation statements)

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“…The climatic interpretation of Quelccaya has been controversial, however, with disagreement arising about the fidelity of the annual accumulation data (e.g. Hastenrath et al 2004, Vimeux et al 2008) and the climatic significance of the stable oxygen isotopic ratios (Thompson et al 2000, Vuille et al 2003a,b, Hoffmann et al 2003, Hastenrath et al 2004, Vimeux et al 2005, Sturm et al 2007). We accept the standard interpretation mentioned previously (Dansgaard 1964, Rozanski et al 1993, that δ 18 O of tropical precipitation is largely a measure of the amount of precipitation rainout between source (the Atlantic Ocean and the Amazon) and the final sink (Quelccaya).…”

Section: Precipitation In Tropical South America During the Late Quatmentioning

confidence: 99%

“…Throughout the tropics, it is almost universally observed that δ 18 O of precipitation is a measure of the amount of "rain out" from the atmosphere of moisture along its advective pathway from the evaporation source to the site of precipitation (e.g. Dansgaard 1964, Rozanski et al 1993, Vuille et al 2003a, Vimeux et al 2005. Although changing circulation trajectories and changing moisture sources can surely complicate its interpretation, we accept that δ 18 O in past precipitation, derived either from its direct measurement in ice cores or less direct deduction from measurements in speleothems or lacustrine carbonates, is a valid proxy for past precipitation amount.…”

Section: Precipitation In Tropical South America During the Late Quatmentioning

confidence: 99%

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The Nature and Origin of Decadal to Millennial Scale Climate Variability in the Southern Tropics of South America: The Holocene Record of Lago Umayo, Peru

Baker

Fritz

Burns

et al. 2009

Developments in Paleoenvironmental Research

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This paper serves two purposes: to review current ideas about the nature and forcing of decadal to millennial scale precipitation variation in the southern tropics of South America during the late Quaternary and to present a new methodology for the reconstruction of precipitation as applied to a Holocene stable isotopic record of carbonate sediments in a tropical Andean lake, Lago Umayo, Peru. The basic thesis of the first part of the paper is that, although modern instrumental records suffice for deducing climate variability at decadal and shorter time scales, these records cannot adequately characterize the nature and forcing of lower-frequency climate variation. Understanding the nature of multi-decadal to millennial-scale climate variation and the mechanisms of large abrupt climate change is best derived from paleoclimatic time series. Tropical Atlantic sea-surface temperature variation is a significant control on tropical South American paleoclimate at these longer time scales. In the second part of the paper, an original method is presented for quantitatively reconstructing precipitation. This method utilizes the well-known relationship between the stable isotopic composition of precipitation and the amount of precipitation, a relationship that is highly significant in many tropical locales. Due to many simplifying assumptions, the reconstruction should be considered to be tentative.A ~12% increase in precipitation (~570 to 650 mm a -1 ) at 4750 cal year BP is consistent with the 6% increase in summer insolation at this latitude over the same period. However, the increase in precipitation was neither unidirectional nor gradual. Instead, every 240 years on average, precipitation increased or decreased by at least ~8% for periods lasting on average 100 years. The largest of these events had ~15% positive or negative departures from the long-term mean precipitation. These southern tropical wet events apparently coincided with periods of low sea-surface temperatures in the high-latitude North Atlantic, supporting a hypothesis of a tropical North Atlantic b a k e r e t a l . i n p a s t c l i m a t e v a r i a b i l i t y i n s o u t h a m e r i c a (2009) 302sea-surface temperature control on tropical South American precipitation at decadal to millennial scales.

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Section: Precipitation In Tropical South America During the Late Quatmentioning

confidence: 99%

Section: Precipitation In Tropical South America During the Late Quatmentioning

confidence: 99%

The Nature and Origin of Decadal to Millennial Scale Climate Variability in the Southern Tropics of South America: The Holocene Record of Lago Umayo, Peru

Baker

Fritz

Burns

et al. 2009

Developments in Paleoenvironmental Research

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“…It is worth noting that Andean ice cores spanning the last glacial-interglacial transition show a similar deglacial isotopic shift (Vimeux, 2009b). The water stable isotopic composition in those ice cores is likely reflecting precipitation changes at the regional scale, and such a similar deglacial structure is explained by simultaneous cold conditions in the high latitudes and wetter conditions in the Andes (Vimeux et al, 2005;Chiang and Koutavas, 2004).…”

Section: Changes Between the Lgm And Mhmentioning

confidence: 99%

Water and carbon stable isotope records from natural archives: a new database and interactive online platform for data browsing, visualizing and downloading

et al. 2016

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Abstract. Past climate is an important benchmark to assess the ability of climate models to simulate key processes and feedbacks. Numerous proxy records exist for stable isotopes of water and/or carbon, which are also implemented inside the components of a growing number of Earth system model. Model-data comparisons can help to constrain the uncertainties associated with transfer functions. This motivates the need of producing a comprehensive compilation of different proxy sources. We have put together a global database of proxy records of oxygen (δ 18 O), hydrogen (δD) and carbon (δ 13 C) stable isotopes from different archives: ocean and lake sediments, corals, ice cores, speleothems and tree-ring cellulose. Source records were obtained from the georeferenced open access PANGAEA and NOAA libraries, complemented by additional data obtained from a literature survey. About 3000 source records were screened for chronological information and temporal resolution of proxy records. Altogether, this database consists of hundreds of dated δ 18 O, δ 13 C and δD records in a standardized simple text format, complemented with a metadata Excel catalog. A quality control flag was implemented to describe age markers and inform on chronological uncertainty. This compilation effort highlights the need to homogenize and structure the format of datasets and chronological information as well as enhance the distribution of published datasets that are currently highly fragmented and scattered. We also provide an online portal based on the records included in this database with an intuitive and interactive platform (http://climateproxiesfinder.ipsl.fr/), allowing one to easily select, visualize and download subsets of the homogeneously formatted records that constitute this database, following a choice of search criteria, and to upload new datasets. In the last part, we illustrate the type of application allowed by our database by comparing several key periods highly investigated by the paleoclimate community.

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“…Si ce caractère a été mis en avant dans la précipitation , il est d'autant plus marqué dans la vapeur : la covariance entre l'évolution des compositions isotopiques à Huaji et à Plataforma est de 0,77 (avec un nombre de mesures de 49) si on excepte la période du 8 au 16 novembre 2005. Entre ces dates, on a b (Vimeux et al, 2005 ;. Cette information est primordiale pour interpréter de manière robuste les enregistrements isotopiques des carottes de glace forées un peu plus haut, dans les glaciers.…”

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La composition isotopique de la vapeur d'eau ; apport à l'étude des processus atmosphériques

Vimeux¹

2013

Météorologie

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RésuméLa composition isotopique des préci-pitations est utilisée depuis longtemps pour reconstruire la variabilité climatique passée à partir de sa conservation dans des archives comme les glaciers, les spéléothèmes, etc. Elle permet aussi d'aborder et de décorti-quer des mécanismes qui régissent le climat présent. La mise sur le marché d'une nouvelle technique a permis d'étendre les mesures isotopiques sur la phase vapeur et d'accéder à une information continue dans le temps. À travers divers exemples choisis sur des terrains variés, des régions polaires aux tropiques, cet article illustre le potentiel de la composition isotopique de la vapeur d'eau en surface, en regard de données météorolo-giques plus classiques, pour étudier des processus aussi divers que le mélange de masses d'air, l'origine de la vapeur d'eau, la structure, l'intensité et l'organisation de la convection, la formation et la dissipation des nappes de brouillard et la circulation atmosphérique à différentes échelles de temps. 32La Météorologie -n°81 -mai 2013 (H 2 18 O et HD 16 O) ont tendance à se retrouver préférentiellement dans la phase condensée lors de la condensation ou lors de l'évaporation. Cela résulte du fait que la pression de vapeur saturante de ces molécules lourdes est inférieure à la pression de vapeur saturante de la molécule ordinaire. Les molécules lourdes présentent aussi une diffusion dans l'air amoindrie relativement à la molécule ordinaire. Ainsi, un phénomène comme l'évaporation va renforcer le fractionnement induit par les différences de pression saturante et appauvrir encore un peu plus en molé-cules lourdes la vapeur formée. C'est l'appauvrissement ou l'enrichissement en molécules lourdes qui est mesuré (cf. section sur la mesure). L'ensemble de ces changements de phase est intrinsè-quement lié à l'histoire de la masse d'air (son origine, sa recharge en eau par le recyclage océanique ou continental, son refroidissement et les différents cycles de condensation-évaporation), et l'outil isotopique se présente comme un traceur géochimique de qualité pour reconstruire les conditions climatiques à différentes échelles de temps. En quoi la composition isotopique des précipitations nous est-elle utile ?La composition isotopique des précipi-tations peut être parfaitement conservée dans des archives climatiques comme les carottes de glace (archive directe) ou les spéléothèmes (archives indirectes). Elle est alors largement utilisée pour reconstruire la variabilité climatique passée. Ces reconstructions sont basées, aux hautes latitudes, sur la relation linéaire positive que l'on observe aujourd'hui entre la composition isotopique des précipitations et la température de surface, appelée thermomètre isotopique (MassonDelmotte et Chappellaz, 2002 ;Vimeux, 2003). Cette relation découle de l'appauvrissement en molécules lourdes que subit une masse d'air au fur et à mesure qu'elle se refroidit lors de son transport depuis les sources océa-niques tropicales et subtropicales vers les pôles. Plus le refroidissement est important, ...

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What are the climate controls on δD in precipitation in the Zongo Valley (Bolivia)? Implications for the Illimani ice core interpretation

Cited by 175 publications

References 44 publications

The Nature and Origin of Decadal to Millennial Scale Climate Variability in the Southern Tropics of South America: The Holocene Record of Lago Umayo, Peru

The Nature and Origin of Decadal to Millennial Scale Climate Variability in the Southern Tropics of South America: The Holocene Record of Lago Umayo, Peru

Water and carbon stable isotope records from natural archives: a new database and interactive online platform for data browsing, visualizing and downloading

La composition isotopique de la vapeur d'eau ; apport à l'étude des processus atmosphériques

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