Evidence of solar insolation and internal forcing of sea surface temperature changes in the eastern tropical Indian Ocean during the Holocene

Ziye Li, Min Te Chen, Da Cheng Lin, Xuefa Shi, Shengfa Liu, Houjie Wang, Yusuke Yokoyama, Chuan Chou Shen, Horng Sheng Mii, Rainer Arief Troa, Rina Zuraida, Eko Triarso, Marfasran Hendrizan

Research output: Contribution to journalArticle

Abstract

The forcing and mechanisms governing sea surface temperature (SST) variations in the Indo-Pacific Warm Pool (IPWP) are complex. Insight into the full spectrum of IPWP climate dynamics, however, is limited by the spatial and temporal coverage of the climate data. In particular, the relationships among the changes in the SSTs, the precipitation patterns mainly associated with rainfalls from Asian Monsoons (AM), and the Indian Ocean Dipole (IOD) are poorly understood. To help us further assess the climate linkages, we have reconstructed a more spatial SST pattern during the Holocene by using multiple SST proxies (alkenone unsaturation index U37 k and Mg/Ca of planktic foraminifer) in the Eastern Tropical Indian Ocean (ETIO), the western margin of the IPWP based on three sedimentary cores from NW offshore of Sumatra, and offshore of Sumatra and Java (BS24, SO139-74KL, and SO184-100430). Stable hydrogen and carbon isotope records of terrestrial plant waxes from a nearby marine sediment core SO189-144KL and geochemical tracers measured from the coral reefs within the Mentawai Islands in the ETIO are used here as AM driven precipitation and IOD records in our data synthesis. Not surprisingly, our synthesis suggests that insolation plays a major role that has been responsible for the increased SSTs in ETIO since the early Holocene, while other mechanisms remain effective in determining the timing of our reconstructed SST variations. In particular, our SST pattern shares less similarity with that of coral Sr/Ca SST and is decoupled from the coral IOD events in the mid-Holocene. We interpret that our reconstructed ETIO SSTs are driven dominantly by the solar forcing, but are also affected by other internal climate mechanisms such as the local shifts in AM-controlled upwelling and precipitation, episodic reductions in the flow of warm western Pacific surface water into the Indian Ocean due to increased precipitation over the Indonesian archipelago, and long-term ENSO or IOD-like climate change.

Original languageEnglish
Pages (from-to)1-9
Number of pages9
JournalQuaternary International
Volume490
DOIs
Publication statusPublished - 2018 Oct 10

Fingerprint

insolation
Incident solar radiation
Indian Ocean
sea surface temperature
surface temperature
solar radiation
Holocene
climate
warm pool
monsoons
Temperature
dipoles
Indonesia
monsoon
Carbon Isotopes
Reefs
corals
Waxes
Precipitation (meteorology)
coral

Keywords

  • Asian monsoon
  • Eastern Indian Ocean
  • ENSO
  • Holocene
  • Indo-Pacific Warm Pool
  • IOD
  • Sea surface temperature

ASJC Scopus subject areas

  • Earth-Surface Processes

Cite this

Evidence of solar insolation and internal forcing of sea surface temperature changes in the eastern tropical Indian Ocean during the Holocene. / Li, Ziye; Chen, Min Te; Lin, Da Cheng; Shi, Xuefa; Liu, Shengfa; Wang, Houjie; Yokoyama, Yusuke; Shen, Chuan Chou; Mii, Horng Sheng; Troa, Rainer Arief; Zuraida, Rina; Triarso, Eko; Hendrizan, Marfasran.

In: Quaternary International, Vol. 490, 10.10.2018, p. 1-9.

Research output: Contribution to journalArticle

Li, Z, Chen, MT, Lin, DC, Shi, X, Liu, S, Wang, H, Yokoyama, Y, Shen, CC, Mii, HS, Troa, RA, Zuraida, R, Triarso, E & Hendrizan, M 2018, 'Evidence of solar insolation and internal forcing of sea surface temperature changes in the eastern tropical Indian Ocean during the Holocene', Quaternary International, vol. 490, pp. 1-9. https://doi.org/10.1016/j.quaint.2018.04.001
Li, Ziye ; Chen, Min Te ; Lin, Da Cheng ; Shi, Xuefa ; Liu, Shengfa ; Wang, Houjie ; Yokoyama, Yusuke ; Shen, Chuan Chou ; Mii, Horng Sheng ; Troa, Rainer Arief ; Zuraida, Rina ; Triarso, Eko ; Hendrizan, Marfasran. / Evidence of solar insolation and internal forcing of sea surface temperature changes in the eastern tropical Indian Ocean during the Holocene. In: Quaternary International. 2018 ; Vol. 490. pp. 1-9.
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AU - Wang, Houjie

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AU - Shen, Chuan Chou

AU - Mii, Horng Sheng

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