Response of cellulose oxygen isotope values of teak trees in differing monsoon environments to monsoon rainfall

Managave, Shreyas; Sheshshayee, M. S.; Ramesh, R.; Borgaonkar, H. P.; Shah, Sameena; Bhattacharyya, Amitava

doi:10.1016/j.dendro.2010.05.002

Cited by 44 publications

(41 citation statements)

References 37 publications

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“…The few studies undertaken so far show that oxygen isotope signals in wood of lowland tropical trees are often dominated by a negative influence of precipitation amount (7,23,26), but correlations are often weak (7). Positive correlations with rainfall amount have also been found (26). Still, the number of long treering isotope chronologies is small, and the factors controlling variation in tree-ring oxygen isotope ratios in lowland tropics remain poorly understood.…”

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confidence: 99%

“…In the tropics, the number of oxygen isotope studies is small, although recently has been increasing. The few studies undertaken so far show that oxygen isotope signals in wood of lowland tropical trees are often dominated by a negative influence of precipitation amount (7,23,26), but correlations are often weak (7). Positive correlations with rainfall amount have also been found (26).…”

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Oxygen isotopes in tree rings are a good proxy for Amazon precipitation and El Niño-Southern Oscillation variability

Brienen

Helle

Pons

et al. 2012

Proc. Natl. Acad. Sci. U.S.A.

175

145

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We present a unique proxy for the reconstruction of variation in precipitation over the Amazon: oxygen isotope ratios in annual rings in tropical cedar (Cedrela odorata). A century-long record from northern Bolivia shows that tree rings preserve the signal of oxygen isotopes in precipitation during the wet season, with weaker influences of temperature and vapor pressure. Tree ring δ 18 O correlates strongly with δ 18 O in precipitation from distant stations in the center and west of the basin, and with Andean ice core δ 18 O showing that the signal is coherent over large areas. The signal correlates most strongly with basin-wide precipitation and Amazon river discharge. We attribute the strength of this (negative) correlation mainly to the cumulative rainout processes of oxygen isotopes (Rayleigh distillation) in air parcels during westward transport across the basin. We further find a clear signature of the El Niño-Southern Oscillation (ENSO) in the record, with strong ENSO influences over recent decades, but weaker influence from 1925 to 1975 indicating decadal scale variation in the controls on the hydrological cycle. The record exhibits a significant increase in δ 18 O over the 20th century consistent with increases in Andean δ 18 O ice core and lake records, which we tentatively attribute to increased water vapor transport into the basin. Taking these data together, our record reveals a fresh path to diagnose and improve our understanding of variation and trends of the hydrological cycle of the world's largest river catchment.climate change | dendrochronology | plant physiology T he Amazon basin is a major center of atmospheric convection and precipitation (1), and at the same time the world's largest drainage basin. The Amazon's river discharge accounts for ∼17% of the annual global discharge to the oceans (2); its hydrological cycle is tightly linked with the carbon cycle of the Amazon rainforest (3), which itself is one of the largest terrestrial biomass carbon pools. Changes in the hydrological cycle of the Amazon may therefore significantly affect atmospheric dynamics and global climate by changing atmospheric CO 2 concentration. Two particularly severe droughts occurred within the last decade (4), and long-term river records of the Amazon show a steady increase in discharge over the last century (5), indicating that the system may start to undergo some changes. It has been suggested that these changes are a result of anthropogenic warming, but they may also be part of longer-term, natural climatic variability. To clarify such a globally important issue, long-term, accurate records of the hydrological cycle of the Amazon basin are needed. However, meteorological data are only reliable for the last 50-60 y (6), and annually resolved long-term proxies for the hydrological cycle from within the Amazon basin itself are very scarce (7).A commonly used diagnostic for strength and functioning of the water cycle is the isotopic composition of precipitation. Although variation of oxygen isotope ratios in precip...

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confidence: 99%

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confidence: 99%

Oxygen isotopes in tree rings are a good proxy for Amazon precipitation and El Niño-Southern Oscillation variability

Brienen

Helle

Pons

et al. 2012

Proc. Natl. Acad. Sci. U.S.A.

175

145

View full text Add to dashboard Cite

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“…2A). The majority of tree-ring oxygen isotope studies from lowland tropics undertaken so far, relies on just a few replicated samples (1-3), and mostly reveals the expected significant negative correlation with rainfall amounts (Ballantyne et al, 2010;Evans, 2007;Evans and Schrag, 2004;Managave et al, 2011;Poussart et al, 2004), although in one instance a positive correlation with rainfall amount was found (Managave et al, 2010b). From tropical or sub-tropical Asia centennial, or even longer, stable isotope records are scarce (e.g.…”

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confidence: 99%

“…From tropical or sub-tropical Asia centennial, or even longer, stable isotope records are scarce (e.g. Managave et al, 2011;Sano et al, 2012;Zhu et al, 2012). To date no well replicated, long-term, stable isotope record exists from lowland teak trees.…”

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confidence: 99%

“…However, in their study a correlation with local or regional rainfall pattern was not tested in detail.  18 O studies on teak from India (Managave et al, 2010a;Managave et al, 2011) found both negative and positive correlations with the amount of rainy season rainfall at inter-and intra-annual scale. Studies in tropical regions of South-America have likewise reported negative correlation with the rainfall amount during rainy season (Ballantyne et al, 2010;Brienen et al, 2012), as have isotope studies in Southeast Asia (Sano et al, 2012;Xu et al, 2011;Zhu et al, 2012).…”

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Multiple tree-ring chronologies (ring width, δ13C and δ18O) reveal dry and rainy season signals of rainfall in Indonesia

Schollaen

Heinrich

Neuwirth

et al. 2013

Quaternary Science Reviews

104

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Climatic hazards, such as severe droughts and floods, affect extensive areas across monsoon Asia and can have profound impacts on the populations of that region. The area surrounding Indonesia, including large portions of the eastern Indian Ocean and Java Sea, plays a key role in the global climate system because of the enormous heat and moisture exchange that occurs between the ocean and atmosphere there. Here, we evaluate the influence of rainfall variability on multiple treering parameters of teak (Tectona grandis) trees growing in a lowland rain forest in Central Java (Indonesia). We assess the potential of, annually resolved, tree-ring width, stable carbon ( 13 C) and oxygen ( 18 O) isotope records to improve our understanding of the Asian monsoon variability.Climate response analysis with regional, monthly rainfall data reveals that all three tree-ring parameters are significantly correlated to rainfall, albeit during different monsoon seasons. Precipitation in the beginning of the rainy season (Sep-Nov) is important for tree-ring width, confirming previous studies. Compared to ring width, the stable isotope records possess a higher degree of common signal, especially during portions of the peak rainy season (

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Model evaluation of the coherence of a common source water oxygen isotopic signal recorded by tree-ring cellulose and speleothem calcite

Managave

2014

Geochem. Geophys. Geosyst.

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O records of the two proxies. When the former is higher than or comparable with the latter, finding one to one correspondence between the d 18 O records of the two proxies could be challenging. Modeling exercise revealed a favorable climatic condition at Jagdalpur (19.08 N, 82.03 E), a potential tropical location for tree ring and speleothem-based climate reconstruction, for inheriting a common source water d 18 O signal in both the proxies. d 18 O records of tree ring and annually resolved speleothem from Jagdalpur could be integrated for the multiproxy climate reconstruction.

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Response of cellulose oxygen isotope values of teak trees in differing monsoon environments to monsoon rainfall

Cited by 44 publications

References 37 publications

Oxygen isotopes in tree rings are a good proxy for Amazon precipitation and El Niño-Southern Oscillation variability

Oxygen isotopes in tree rings are a good proxy for Amazon precipitation and El Niño-Southern Oscillation variability

Multiple tree-ring chronologies (ring width, δ13C and δ18O) reveal dry and rainy season signals of rainfall in Indonesia

Model evaluation of the coherence of a common source water oxygen isotopic signal recorded by tree-ring cellulose and speleothem calcite

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