Indonesian throughflow controlled the westward extent of the Indo-Pacific Warm Pool during glacial-interglacial intervals

Saraswat, Rajeev; Singh, D. K.; Lea, David W.; Mackensen, Andreas; Naik, D.

doi:10.1016/j.gloplacha.2019.103031

Cited by 20 publications

(11 citation statements)

References 67 publications

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“…The Zhaitang section is at the NE plateau. Yellow dots show marine core locations: MD97-2141, 106 ODP1145, 107 MD06-3067, 108 MD01-2386, 109 U1429, 21 and MD97-2140 110 in the western Pacific and SK237-GC09, 111 U1446, 22 and NGHP17 112 in the Indian Ocean. …”

Section: Low-latitude Monsoonmentioning

confidence: 99%

Milankovitch theory and monsoon

Cheng¹,

Li²,

Sha³

et al. 2022

The Innovation

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Section: Low-latitude Monsoonmentioning

confidence: 99%

Milankovitch theory and monsoon

Cheng¹,

Li²,

Sha³

et al. 2022

The Innovation

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“…The stable oxygen isotopic ratio (δ 18 O) of biogenic carbonates is one of the most extensively used marine palaeoclimatic proxies (Mulitza et al, 1997;Lea, 2014;Metcalfe et al, 2019;Saraswat et al, 2019). Even though it was initially suggested that the oxygen isotopic fractionation in biogenic carbonates is largely driven by temperature (Urey, 1947), subsequent work revealed that, besides temperature, the salinity and carbonate ion concentration of ambient seawater also affects the biogenic carbonate δ 18 O (Vergnaud-Grazzini, 1976;Spero et al, 1997;Bemis et al, 1998;Spero et al, 1997;Bijma et al, 1999;Mulitza et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Large freshwater-influx-induced salinity gradient and diagenetic changes in the northern Indian Ocean dominate the stable oxygen isotopic variation in Globigerinoides ruber

Saraswat

Suokhrie

Naik

et al. 2023

Earth Syst. Sci. Data

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Abstract. The application of stable oxygen isotopic ratio of surface-dwelling planktic foraminifera Globigerinoides ruber (white variety; δ18Oruber) to reconstruct past hydrological changes requires a precise understanding of the effect of ambient parameters on δ18Oruber. The northern Indian Ocean, with its huge freshwater influx and being a part of the Indo-Pacific Warm Pool, provides a unique setting to understand the effect of both the freshwater-influx-induced salinity and temperature on δ18Oruber. Here, we use a total of 400 surface samples (252 from this work and 148 from previous studies), covering the entire salinity end-member region, to assess the effect of freshwater-influx-induced seawater salinity and temperature on δ18Oruber in the northern Indian Ocean. The analysed surface δ18Oruber mimics the expected δ18O calcite estimated from the modern seawater parameters (temperature, salinity, and seawater δ18O) very well. We report a large diagenetic overprinting of δ18Oruber in the surface sediments, with an increase of 0.18 ‰ per kilometre increase in water depth. The freshwater-influx-induced salinity exerts the major control on δ18Oruber (R2=0.63) in the northern Indian Ocean, with an increase of 0.29 ‰ per unit increase in salinity. The relationship between temperature- and salinity-corrected δ18Oruber (δ18Oruber−δ18Osw) in the northern Indian Ocean [T=-0.59⋅(δ18Oruber-δ18Osw)+26.40] is different than reported previously, based on the global compilation of plankton tow δ18Oruber data. The revised equations will help create a better palaeoclimatic reconstruction from the northern Indian Ocean by using the stable oxygen isotopic ratio. The entire data set (newly generated and previously published) used in this work is available both as a Supplement to this article and at PANGAEA (https://doi.org/10.1594/PANGAEA.945401; Saraswat et al., 2022).

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“…The dynamics of ocean warm pools is recognized to play an important role in the large‐scale sea‐air interactions (Windler et al., 2019; Yan et al., 2021; Zhang et al., 2018). In recent decades, more and more researches indicated that the ocean warm pools are key sources of climate change with very strong and enduring atmospheric convections (Park et al., 2018; Roxy et al., 2019; Saraswat et al., 2019; Xie et al., 2020). Their dynamics have been proved responsible for the variation of regional climate in temperature, precipitation (Fan et al., 2016; Ning & Bradley, 2016), wind (Misra et al., 2011), and snow on land (Martin & Germain, 2017; Peings et al., 2017).…”

Section: Introductionmentioning

confidence: 99%

Impacts of the Western Pacific and Indian Ocean Warm Pools on Wildfires in Yunnan, Southwest China: Spatial Patterns With Interannual and Intraannual Variations

Liu

Shen

Guan³

et al. 2022

Geophysical Research Letters

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The Indo‐Pacific warm pool affects the regional climatic conditions in Southeast Asia mediated by the Western Pacific (WP) and Indian Ocean (IO) monsoons, which are recognized as critical regulators of wildfires in this region. Our study explored the spatiotemporal effects of the warm pools on wildfire records in Yunnan, Southwest China. We showed the interannual records had a negative relationship with the simultaneous WP warm pool area index. The Ailao Mountains in the central Yunnan could be a geographical barrier that blocked the influences of the WP warm pool from the east side. For the intraannual changes, the wildfire number variations had a stronger connection to the IO warm pool dynamics than the WP. Our study provided the novel evidence on the teleconnection between the Indo‐Pacific warm pool dynamics and regional environmental processes in Yunnan, also indicating this area as a part of the transitional zone between the two warm pools.

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Indonesian throughflow controlled the westward extent of the Indo-Pacific Warm Pool during glacial-interglacial intervals

Cited by 20 publications

References 67 publications

Milankovitch theory and monsoon

Milankovitch theory and monsoon

Large freshwater-influx-induced salinity gradient and diagenetic changes in the northern Indian Ocean dominate the stable oxygen isotopic variation in Globigerinoides ruber

Impacts of the Western Pacific and Indian Ocean Warm Pools on Wildfires in Yunnan, Southwest China: Spatial Patterns With Interannual and Intraannual Variations

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