Warm pool ocean heat content regulates ocean–continent moisture transport

Jian, Zhimin; Wang, Yue; Dang, Haowen; Mohtadi, Mahyar; Rosenthal, Yair; Lea, David W.; Liu, Zhongfang; Jin, Haiyan; Ye, Liming; Kuhnt, Wolfgang; Wang, Xingxing

doi:10.1038/s41586-022-05302-y

Cited by 58 publications

(28 citation statements)

References 82 publications

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“…2a). Studies have shown that the IPWP serves as an atmospheric "water tower" because of warmer SSTs, relatively low surface pressure, and strong moisture convergence (Jian et al 2022). Consistent with the previous ndings, the difference in precipitation exhibits enhanced wetter conditions over the MC region in the SWG (Fig.…”

Section: Diversity Of Wpi In Cmip6 Modelssupporting

confidence: 84%

Intermodel relation between present-day warm pool intensity and future precipitation changes

Kug

Pathirana

et al. 2023

Preprint

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Tropical convection plays an important role in regional and global climate variability, and future changes in tropical precipitation under anthropogenic global warming are critical for projecting future changes in regional climate. In this study, by analyzing Coupled Model Intercomparison Project (CMIP) phase 6 models, we show that changes in projected tropical precipitation in CMIP6 models vary among models, but they are largely associated with the model’s warm pool intensity in the present-day (PD) climate. Models with stronger warm pools in the PD simulation tend to simulate an increase in precipitation in the central Pacific (CP) and a decrease in Maritime Continent (MC) under greenhouse warming. Significant differences in precipitation between the CP and MC regions induce low-level westerly anomalies over the western-central Pacific, favoring sea surface temperature warming in the CP region, suggesting that the associated air–sea interactions yield a particular tropical pattern in response to anthropogenic forcing.

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Section: Diversity Of Wpi In Cmip6 Modelssupporting

confidence: 84%

Intermodel relation between present-day warm pool intensity and future precipitation changes

Kug

Pathirana

et al. 2023

Preprint

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“…In this context, strengthening of the Walker circulation and the suppression of El Niño events in the early Holocene have been related to increased upper ocean heat storage in the IPWP during the precessional minimum at 11.5 ka 82 , 88 , 89 . Recent compilations of upper ocean heat content records in the IPWP for the last glacial–interglacial cycles and transient climate simulations further highlighted the importance of precessional insolation as a driver of variability for the Austral–Asian Monsoon system 90 , 91 . These studies suggested, in particular, that precession-modulated variations in IPWP upper ocean heat content controlled the convergence of moisture and latent heat over the past 360 kyr, thus regulating the ocean-continent hydrological cycle within the Austral–Asian Monsoon domain 90 .…”

Section: Resultsmentioning

confidence: 99%

Middle Pleistocene re-organization of Australian Monsoon

et al. 2023

Self Cite

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The sensitivity of the Australian Monsoon to changing climate boundary conditions remains controversial due to limited understanding of forcing processes and past variability. Here, we reconstruct austral summer monsoonal discharge and wind-driven winter productivity across the Middle Pleistocene Transition (MPT) in a sediment sequence drilled off NW Australia. We show that monsoonal precipitation and runoff primarily responded to precessional insolation forcing until ~0.95 Ma, but exhibited heightened sensitivity to ice volume and pCO2 related feedbacks following intensification of glacial-interglacial cycles. Our records further suggest that summer monsoon variability at the precessional band was closely tied to the thermal evolution of the Indo-Pacific Warm Pool and strength of the Walker circulation over the past ~1.6 Myr. By contrast, productivity proxy records consistently tracked glacial-interglacial variability, reflecting changing rhythms in polar ice fluctuations and Hadley circulation strength. We conclude that the Australian Monsoon underwent a major re-organization across the MPT and that extratropical feedbacks were instrumental in driving short- and long-term variability.

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“…For example, Liu and Battisti (2015) found that during low summer insolation periods (and Northern Hemisphere cooling), the southward movement of the Atlantic ITCZ is enhanced by the strengthening of the African winter monsoon, which, in turn, is induced by anomalous north African cooling. Similarly, Jian et al (2022) argued that upper ocean heat convergence in the Indo-Pacific Warm Pool accompanies surface wind changes during high summer insolation periods. The resulting rise in ocean heat content enhances northward latent heat transport and provides a coupled atmosphere-ocean link between the Asian Monsoon, ENSO, and the Indian Ocean dipole (IOD) (see section 3.2 for more on modes of climate variability).…”

Section: Speleothemsmentioning

confidence: 99%

Water isotopes, climate variability, and the hydrological cycle: recent advances and new frontiers

Dee

Bailey

Conroy

et al. 2023

Environ. Res.: Climate

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The hydrologic cycle is a fundamental component of the climate system with critical societal and ecological relevance. Yet gaps persist in our understanding of water fluxes and their response to increased greenhouse gas forcing. The stable isotope ratios of oxygen and hydrogen in water provide a unique opportunity to evaluate hydrological processes and investigate their role in the variability of the climate system and its sensitivity to change. Water isotopes also form the basis of many paleoclimate proxies in a variety of archives, including ice cores, lake and marine sediments, corals, and speleothems. These records hold most of the available information about past hydrologic variability prior to instrumental observations. Water isotopes thus provide a ‘common currency’ that links paleoclimate archives to modern observations, allowing us to evaluate hydrologic processes and their effects on climate variability on a wide range of time and length scales. Building on previous literature summarizing advancements in water isotopic measurements and modeling and describe water isotopic applications for understanding hydrological processes, this topical review reflects on new insights about climate variability from isotopic studies. Our intention is to highlight new work and opportunities to enhance our understanding and predictive skill, rather than be exhaustive. We offer a set of recommendations to advance observational and model-based tools for climate research, and highlight opportunities to better constrain climate sensitivity and identify anthropogenically-driven hydrologic changes within the inherently noisy background of natural climate variability.

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Warm pool ocean heat content regulates ocean–continent moisture transport

Cited by 58 publications

References 82 publications

Intermodel relation between present-day warm pool intensity and future precipitation changes

Intermodel relation between present-day warm pool intensity and future precipitation changes

Middle Pleistocene re-organization of Australian Monsoon

Water isotopes, climate variability, and the hydrological cycle: recent advances and new frontiers

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