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Climate of the Past An interactive open-access journal of the European Geosciences Union
doi:10.5194/cpd-10-4595-2014
© Author(s) 2014. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
18 Dec 2014
Review status
This discussion paper has been under review for the journal Climate of the Past (CP). The revised manuscript was not accepted.
The sharp decline of East Asian summer monsoon at mid-Holocene indicated by the lake-wetland transition in the Sanjiang Plain, northeastern China
Z. Q. Zhang1, G. P. Wang1, X. G. Lv1, H. J. Jia2, and Q. H. Xu3 1Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, China
2Shijiazhuang Univerity of Economics, Shijiazhuang, China
3Hebei normal University, Shijiazhuang, China
Abstract. The timing of the waxing and wining of the East Asian summer monsoon during the Holocene is still under debate. In present study, we present the high-resolution grain-size and LOI records from a well-dated mud/peat profile to reveal the lake-wetland transition in the Sanjiang Plain and discuss its significance to Holocene monsoon evolutions. The results show that the shallow-water lakes have developed in low-lying areas of the plain before 4600 yr BP, corresponding to the Holocene monsoon maximum. Thereafter, the wetlands began to initiate with the extinction of the paleolakes, marking a lake-shrinking stage with the relative dry climate. Considering the prevalent monsoon climate in the Sanjiang Plain, we suggest the lake-wetland transition at 4600 yr BP indicate a sharp decline of the summer monsoon rather than the basin infilling process. Such a remarkable monsoon weakening event has been widely documented in northern China, and we associated it with the ocean–atmosphere interacting processes in low-latitude regions.

Citation: Zhang, Z. Q., Wang, G. P., Lv, X. G., Jia, H. J., and Xu, Q. H.: The sharp decline of East Asian summer monsoon at mid-Holocene indicated by the lake-wetland transition in the Sanjiang Plain, northeastern China, Clim. Past Discuss., 10, 4595-4622, doi:10.5194/cpd-10-4595-2014, 2014.
Z. Q. Zhang et al.
Z. Q. Zhang et al.

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The results show that the shallow-water lakes have developed in low-lying areas of the plain before 4600 yr BP, corresponding to the Holocene monsoon maximum. Thereafter, the wetlands began to initiate with the extinction of the paleolakes, marking a lake-shrinking stage with the relative dry climate.We suggest the lake-wetland transition at 4600 yr BP indicate a sharp decline of the summer monsoon.
The results show that the shallow-water lakes have developed in low-lying areas of the plain...
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