Journal cover Journal topic
Climate of the Past An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

IF value: 3.536
IF3.536
IF 5-year value: 3.967
IF 5-year
3.967
CiteScore value: 6.6
CiteScore
6.6
SNIP value: 1.262
SNIP1.262
IPP value: 3.90
IPP3.90
SJR value: 2.185
SJR2.185
Scimago H <br class='widget-line-break'>index value: 71
Scimago H
index
71
h5-index value: 40
h5-index40
Preprints
https://doi.org/10.5194/cpd-4-929-2008
© Author(s) 2008. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/cpd-4-929-2008
© Author(s) 2008. This work is distributed under
the Creative Commons Attribution 3.0 License.

  13 Aug 2008

13 Aug 2008

Review status
This preprint was under review for the journal CP but the revision was not accepted.

Holocene weak summer East Asian monsoon intervals in subtropical Taiwan and their global synchronicity

K. Selvaraj1, C.-T. A. Chen1, and J.-Y. Lou2 K. Selvaraj et al.
  • 1Institute of Marine Geology and Chemistry, National Sun Yat-sen University, Kaohsiung 804, Taiwan
  • 2Department of Marine Science, Naval Academy, P.O. Box 90175, Tsoying, Kaohsiung, Taiwan

Abstract. Sedimentary total organic carbon and carbon-to-nitrogen ratio records from the subalpine Retreat Lake in NE Taiwan reveal four centennial periods (~8–8.3, 5.1–5.7, 4.5–~2.1, and 2–1.6 kyr BP) of relatively reduced summer East Asian monsoon (EAM) precipitation that were superimposed on the insolation-dependent, long-term decreasing monsoon trend during the middle and late Holocene while early Holocene monsoon strength was controlled by glacial boundary conditions. Strikingly, all weak monsoon events correlate with the timings of low sea surface temperature in the tropical Pacific, maxima of hematite stained-grains in the sediments of North Atlantic, reduced formation of North Atlantic Deep Water, and low concentrations of atmospheric methane over Greenland, suggesting a globally well-connected postglacial climate (from ca. 8.6 kyr BP onwards). Persistent linkage of weak summer EAM-tropical Pacific and North Atlantic cooling-reduced global wetland extent during these intervals is believed to be driven by coupled ocean-atmosphere interactions, especially reduced heat and moisture transport and enhanced El Niño-Southern Oscillation in the tropical Pacific, as well as solar activity. Overall similarity of summer EAM with diverse proxy records and their coincidence to abrupt changes witnessed in other paleorecords across the world imply that the centennial-scale reorganizations in the tropical Pacific climate dynamics may have been playing an important role, of course closely in phase with solar variations and North Atlantic climate, in the Holocene summer EAM and, by extension, low-latitude's monsoon instability.

K. Selvaraj et al.

Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

K. Selvaraj et al.

K. Selvaraj et al.

Viewed

Total article views: 1,203 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
550 551 102 1,203 47 90
  • HTML: 550
  • PDF: 551
  • XML: 102
  • Total: 1,203
  • BibTeX: 47
  • EndNote: 90
Views and downloads (calculated since 01 Feb 2013)
Cumulative views and downloads (calculated since 01 Feb 2013)

Cited

Saved

Discussed

No discussed metrics found.
Latest update: 29 Nov 2020
Publications Copernicus
Download
Citation