Linkage between Lake Xingkai sediment geochemistry and Asian summer monsoon since the last interglacial period

Abstract. The orbital-timescale dynamics of the Quaternary Asian summer monsoons (ASM) are frequently attributed to precession-dominated northern hemispheric summer insolation. However, this long-term continuous ASM variability is inferred primarily from oxygen isotope records of stalagmites, mainly from Sanbao cave in mainland China, and may not provide a comprehensive picture of ASM evolution. A new spliced stalagmite oxygen isotope record from Yangkou cave tracks summer monsoon precipitation variation from 124 to 206 thousand years ago in Chongqing, southwest China. Our Yangkou record supports that the evolution of ASM was dominated by the North Hemisphere solar insolation on orbital timescales. When superimposed on the Sanbao record, the precipitation time series referred from Yangkou cave stalagmites supports the strong ASM periods at marine isotope stages (MIS) 6.3, 6.5, and 7.1 and weak ASM intervals at MIS 6.2, 6.4, and 7.0. This consistency confirms that ASM events affected most of mainland China. Except for the solar insolation forcing, the large amplitude of minimum δ18O values in Yangkou record during glacial period, such as MIS 6.5, could stem from the enhanced prevailing Pacific trade wind and/or continental shelf exposure in the Indo–Pacific warm pool.

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A tropical speleothem record of glacial inception, the South American Summer Monsoon from 125 to 115 ka

Climate of the Past ◽

10.5194/cp-11-931-2015 ◽

2015 ◽

Vol 11 (6) ◽

pp. 931-938 ◽

Cited By ~ 5

Author(s):

S. J. Burns ◽

L. C. Kanner ◽

H. Cheng ◽

R. Lawrence Edwards

Keyword(s):

Summer Monsoon ◽

East Asian Monsoon ◽

Interglacial Period ◽

South American ◽

Last Interglacial ◽

Peruvian Andes ◽

Northern Latitudes ◽

Last Interglacial Period ◽

Rapid Changes

Abstract. Relatively few marine or terrestrial paleoclimate studies have focused on glacial inception, the transition from an interglacial to a glacial climate state. As a result, neither the timing and structure of glacial inception nor the spatial pattern of glacial inception in different parts of the world is well known. Here we present results of a study of a speleothem from the Peruvian Andes that records changes in the intensity of South American Summer Monsoon (SASM) rainfall over the period from 125 to 115 ka. The results show that late in the last interglacial period, at 123 ka, SASM rainfall decreased, perhaps in response to a decrease in temperature and ice cover in the high northern latitudes and associated changes in atmospheric circulation. Then at 120.8 ka, a rapid increase in SASM rainfall marks the end of the last interglacial. After a more gradual increase between 120 and 117 ka, a second abrupt increase occurs at 117 ka. This pattern of change is mirrored to a remarkable degree by changes in the East Asian Monsoon. It is interpreted to reflect both a long-term gradual response of the monsoons to orbitally driven insolation changes and to rapid changes in Northern Hemisphere ice volume and temperature. Both monsoon systems are close to their full glacial conditions by 117 ka, before any significant decrease in atmospheric CO2.

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Environmental and rock magnetic studies of rapid fluctuations of Asian summer monsoon during the last interglacial maximum (MIS 5e)

Chinese Science Bulletin ◽

10.1007/bf02885074 ◽

1999 ◽

Vol 44 (10) ◽

pp. 952-954 ◽

Cited By ~ 5

Author(s):

Xiaomin Fang ◽

Subir K. Banerjee ◽

Jijun Li ◽

Xuerong Dai ◽

Donghong Guan

Keyword(s):

Summer Monsoon ◽

Asian Summer Monsoon ◽

Last Interglacial ◽

Magnetic Studies ◽

Asian Summer ◽

Mis 5E

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Variability of the Asian summer monsoon during the penultimate glacial/interglacial period inferred from stalagmite oxygen isotope records from Yangkou cave, Chongqing, Southwestern China

Climate of the Past Discussions ◽

10.5194/cpd-9-6287-2013 ◽

2013 ◽

Vol 9 (6) ◽

pp. 6287-6309

Author(s):

T.-Y. Li ◽

C.-C. Shen ◽

L.-J. Huang ◽

X.-Y. Jiang ◽

X.-L. Yang ◽

...

Keyword(s):

Oxygen Isotope ◽

Summer Monsoon ◽

Asian Summer Monsoon ◽

Mainland China ◽

Walker Circulation ◽

Interglacial Period ◽

Trade Winds ◽

Comprehensive Picture ◽

Isotope Record ◽

Asian Summer

Abstract. The orbital-timescale dynamics of the Quaternary Asian summer monsoons (ASM) are frequently attributed to precession-dominated Northern Hemisphere summer insolation. However, this ASM variability is inferred primarily from oxygen isotope records of stalagmites, mainly from Sanbao cave in mainland China, and may not provide a comprehensive picture of ASM evolution. A new spliced stalagmite oxygen isotope record from Yangkou cave tracks summer monsoon precipitation variation from 124–206 thousand years ago in Chongqing, southwest China. When superimposed on the Sanbao record, the Yangkou-inferred precipitation time series is shown to support the strong ASM periods at marine isotope stages (MIS) 6.3, 6.5, and 7.1 and weak ASM intervals at MIS 6.2, 6.4, and 7.0. This consistency confirms that ASM events affected most of mainland China. We show that change in glacial/interglacial (G/IG) ASM intensity was also governed by the Walker Circulation by combining our results with published paleo-Pacific thermal and salinity records. One of the strongest ASM events over the past fiver G/IG cycles, at MIS 6.5, was enhanced by such zonal forcing associated with prevailing trade winds in the Pacific.

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A tropical speleothem record of glacial inception, the South American summer monsoon from 125 to 115 ka

Climate of the Past Discussions ◽

10.5194/cpd-10-4365-2014 ◽

2014 ◽

Vol 10 (6) ◽

pp. 4365-4384

Author(s):

S. J. Burns ◽

L. C. Kanner ◽

H. Cheng ◽

R. L. Edwards

Keyword(s):

Northern Hemisphere ◽

Summer Monsoon ◽

East Asian Monsoon ◽

Interglacial Period ◽

South American ◽

Last Interglacial ◽

Peruvian Andes ◽

Last Interglacial Period ◽

Rapid Changes

Abstract. Relatively few marine or terrestrial paleoclimate studies have focused on glacial inception, the transition from an interglacial to a glacial climate state. As a result, the timing and structure of glacial inception is not well known, nor is the spatial pattern of glacial inception in different parts of the world. Here we present results of a study of a speleothem from the Peruvian Andes that records changes in the intensity of South American Summer Monsoon (SASM) rainfall over the period from 125 to 115 ka. The results show that late in the last interglacial period, at 123 ka, SASM rainfall decreased, perhaps in response to a decrease in Northern Hemisphere ice cover. Then at 120.8 ka a rapid increase in SASM rainfall marks the end of the last interglacial. After a more gradual increase between 120 and 117 ka, a second abrupt increase occurs at 117 ka. This pattern of change is mirrored to a remarkable degree by changes in the East Asian Monsoon. It is interpreted to reflect both the a long term gradual response of the monsoons the orbitally-driven insolation changes and to rapid changes in Northern Hemisphere ice volume and temperature. Both monsoon systems are close to their full glacial conditions by 117 ka, before any significant decrease in atmospheric CO2.

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Sensitivity of South Asian summer monsoon simulation to land surface schemes in WRF

International Journal of Climatology ◽

10.1002/joc.7278 ◽

2021 ◽

Author(s):

Sha Lu ◽

Hongchao Zuo

Keyword(s):

South Asian ◽

Summer Monsoon ◽

Land Surface ◽

Asian Summer Monsoon ◽

South Asian Summer Monsoon ◽

Asian Summer

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Skilful predictions of the Asian summer monsoon one year ahead

Nature Communications ◽

10.1038/s41467-021-22299-6 ◽

2021 ◽

Vol 12 (1) ◽

Author(s):

Yuhei Takaya ◽

Yu Kosaka ◽

Masahiro Watanabe ◽

Shuhei Maeda

Keyword(s):

Long Range ◽

Summer Monsoon ◽

Southern Oscillation ◽

Asian Summer Monsoon ◽

Boreal Summer ◽

Climate Modelling ◽

Large Ensemble ◽

Asian Society ◽

Asian Summer ◽

One Year

AbstractThe interannual variability of the Asian summer monsoon has significant impacts on Asian society. Advances in climate modelling have enabled us to make useful predictions of the seasonal Asian summer monsoon up to approximately half a year ahead, but long-range predictions remain challenging. Here, using a 52-member large ensemble hindcast experiment spanning 1980–2016, we show that a state-of-the-art climate model can predict the Asian summer monsoon and associated summer tropical cyclone activity more than one year ahead. The key to this long-range prediction is successfully simulating El Niño-Southern Oscillation evolution and realistically representing the subsequent atmosphere–ocean response in the Indian Ocean–western North Pacific in the second boreal summer of the prediction. A large ensemble size is also important for achieving a useful prediction skill, with a margin for further improvement by an even larger ensemble.

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