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Triple oxygen isotope reveals insolation-forced tropical moisture cycles

Sha, Lijuan ; Dang, Haowen ; Wang, Yue ; Wassenburg, Jasper A. ; Baker, Jonathan L. ; Li, Hanying ; Sinha, Ashish ; Brahim, Yassine Ait ; Wu, Nanping and Lu, Zhengyao LU , et al. (2024) In Science Advances 10(37).
Abstract

Tropical oceans are the main global water vapor and latent heat sources, but their responses to radiative forcing remain unclear. Here, we investigate oceanic moisture dynamics of the western tropical Pacific (WTP) over the past 210,000 years through an approach of planktonic foraminiferal triple oxygen isotope (Δ′17O). The Δ′17O record is dominated by the precession cycles (~23,000 years), with lower values reflecting higher humidity in concert with higher Northern Hemisphere summer insolation. Our empirical and modeling results, combined with other geological archives, suggest that the enhanced moisture convergence over the WTP largely intensifies changes in the meridional and zonal hydrological cycles, affecting... (More)

Tropical oceans are the main global water vapor and latent heat sources, but their responses to radiative forcing remain unclear. Here, we investigate oceanic moisture dynamics of the western tropical Pacific (WTP) over the past 210,000 years through an approach of planktonic foraminiferal triple oxygen isotope (Δ′17O). The Δ′17O record is dominated by the precession cycles (~23,000 years), with lower values reflecting higher humidity in concert with higher Northern Hemisphere summer insolation. Our empirical and modeling results, combined with other geological archives, suggest that the enhanced moisture convergence over the WTP largely intensifies changes in the meridional and zonal hydrological cycles, affecting rainfall patterns in East Asia and northern South America. We propose that the insolation-driven WTP moisture dynamics play a pivotal role in regulating tropical hydroclimate.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Science Advances
volume
10
issue
37
article number
eadp7855
publisher
American Association for the Advancement of Science (AAAS)
external identifiers
  • pmid:39259794
  • scopus:85204167567
ISSN
2375-2548
DOI
10.1126/sciadv.adp7855
language
English
LU publication?
yes
id
2c09037d-6c7a-41ae-b2b5-a4d20e532f5f
date added to LUP
2024-11-22 09:29:20
date last changed
2025-07-05 05:12:31
@article{2c09037d-6c7a-41ae-b2b5-a4d20e532f5f,
  abstract     = {{<p>Tropical oceans are the main global water vapor and latent heat sources, but their responses to radiative forcing remain unclear. Here, we investigate oceanic moisture dynamics of the western tropical Pacific (WTP) over the past 210,000 years through an approach of planktonic foraminiferal triple oxygen isotope (Δ′<sup>17</sup>O). The Δ′<sup>17</sup>O record is dominated by the precession cycles (~23,000 years), with lower values reflecting higher humidity in concert with higher Northern Hemisphere summer insolation. Our empirical and modeling results, combined with other geological archives, suggest that the enhanced moisture convergence over the WTP largely intensifies changes in the meridional and zonal hydrological cycles, affecting rainfall patterns in East Asia and northern South America. We propose that the insolation-driven WTP moisture dynamics play a pivotal role in regulating tropical hydroclimate.</p>}},
  author       = {{Sha, Lijuan and Dang, Haowen and Wang, Yue and Wassenburg, Jasper A. and Baker, Jonathan L. and Li, Hanying and Sinha, Ashish and Brahim, Yassine Ait and Wu, Nanping and Lu, Zhengyao and Yang, Ce and Dong, Xiyu and Lu, Jiayu and Zhang, Haiwei and Mahata, Sasadhar and Cai, Yanjun and Jian, Zhimin and Cheng, Hai}},
  issn         = {{2375-2548}},
  language     = {{eng}},
  number       = {{37}},
  publisher    = {{American Association for the Advancement of Science (AAAS)}},
  series       = {{Science Advances}},
  title        = {{Triple oxygen isotope reveals insolation-forced tropical moisture cycles}},
  url          = {{http://dx.doi.org/10.1126/sciadv.adp7855}},
  doi          = {{10.1126/sciadv.adp7855}},
  volume       = {{10}},
  year         = {{2024}},
}