Asynchronous multi-decadal time-scale series of biotic and abiotic responses to precipitation during the last 1300 years

Abstract East Asian summer monsoon (EASM)-driven rapid hydroclimatic variation is a crucial factor with major socioeconomic impacts. Nevertheless, decadal- to centennial-scale EASM variability over the last two millennia is still poorly understood. Pollen-based quantitative annual precipitation (PqPann) and annual precipitation reconstructed by artificial neural networks (ANNs) for the period 650–1940 CE were reconstructed from a paleo-reservoir in South Korea. ANNs reconstruction was performed to compensate for a hiatus section. On a decadal timescale, 10 high-precipitation periods were identified, and PqPann and ANNs reconstructions were comparable to local instrumental rainfall and historic drought records. Biotic lags to rapid climatic changes ranging from 25 to 100 years were recognized by asynchronous pollen and speleothem responses to precipitation. We suggest that PqPann-based decadal- to centennial-scale climatic change reconstruction should take biotic lags into account, although the lags can be ignored on the millennial scale. The position of the EASM rainband influenced rainfall magnitude.

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The Asian Summer Monsoon: Teleconnections and Forcing Mechanisms—A Review from Chinese Speleothem δ18O Records

Quaternary ◽

10.3390/quat2030026 ◽

2019 ◽

Vol 2 (3) ◽

pp. 26 ◽

Cited By ~ 18

Author(s):

Zhang ◽

Brahim ◽

Li ◽

Zhao ◽

Kathayat ◽

...

Keyword(s):

Summer Monsoon ◽

Asian Summer Monsoon ◽

Temporal Distribution ◽

The Holocene ◽

North Atlantic Climate ◽

Asian Summer ◽

Spatio Temporal ◽

Forcing Mechanisms ◽

The Last Two Millennia ◽

Global Population

Asian summer monsoon (ASM) variability significantly affects hydro-climate, and thus socio-economics, in the East Asian region, where nearly one-third of the global population resides. Over the last two decades, speleothem δ18O records from China have been utilized to reconstruct ASM variability and its underlying forcing mechanisms on orbital to seasonal timescales. Here, we use the Speleothem Isotopes Synthesis and Analysis database (SISAL_v1) to present an overview of hydro-climate variability related to the ASM during three periods: the late Pleistocene, the Holocene, and the last two millennia. We highlight the possible global teleconnections and forcing mechanisms of the ASM on different timescales. The longest composite stalagmite δ18O record over the past 640 kyr BP from the region demonstrates that ASM variability on orbital timescales is dominated by the 23 kyr precessional cycles, which are in phase with Northern Hemisphere summer insolation (NHSI). During the last glacial, millennial changes in the intensity of the ASM appear to be controlled by North Atlantic climate and oceanic feedbacks. During the Holocene, changes in ASM intensity were primarily controlled by NHSI. However, the spatio-temporal distribution of monsoon rain belts may vary with changes in ASM intensity on decadal to millennial timescales.

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Timescale-dependence of the relationship between the East Asian summer monsoon strength and precipitation over eastern China in the last millennium

10.5194/cp-2017-125 ◽

2017 ◽

Author(s):

Jian Shi ◽

Qing Yan ◽

Huijun Wang

Keyword(s):

Summer Monsoon ◽

East Asian Summer Monsoon ◽

Asian Summer Monsoon ◽

East Asian ◽

Eastern China ◽

Summer Precipitation ◽

Ice Age ◽

Last Millennium ◽

Decadal Timescale ◽

Asian Summer

Abstract. Precipitation/humidity proxies are widely used to reconstruct the historical East Asian summer monsoon (EASM) variation based on the assumption that summer precipitation over eastern China is closely and stably linked to the strength of EASM. However, whether the observed EASM-precipitation relationship (e.g., increased precipitation with a stronger EASM) was stable throughout the past time remains unclear. In this study, we used model outputs from the Paleoclimate Modelling Intercomparison Project Phase Ⅲ and Community Earth System Model to investigate the stability of the EASM-precipitation relationship over the last millennium on different timescales. The model results indicate that the EASM strength (defined as the regionally averaged meridional wind) enhanced in the Medieval Climate Anomaly (MCA; ~ 950–1250 A.D.), during which there was increased precipitation over eastern China, and weakened during the Little Ice Age (LIA; ~ 1500‒1800 A.D.), during which there was decreased precipitation, consistent with precipitation/humidity proxies. However, the simulated EASM-precipitation relationship is only stable on a centennial and longer timescale and is unstable on a multi-decadal timescale. The nonstationary multi-decadal EASM-precipitation relationship broadly exhibits a quasi-60-year period, which may be attributed to the internal variability of the climate system and have no significant correlation to external forcings. Our results have implications for understanding the discrepancy among various EASM proxies on a multi-decadal timescale and highlight the need to rethink reconstructed decadal EASM variations based on precipitation/humidity proxies.

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The East Asian Monsoon During MIS 2 Expressed in a Speleothem δ18O Record From Jintanwan Cave, Hunan, China

Quaternary Research ◽

10.1016/j.yqres.2010.01.003 ◽

2010 ◽

Vol 73 (3) ◽

pp. 541-549 ◽

Cited By ~ 11

Author(s):

Jason Cosford ◽

Hairuo Qing ◽

Yin Lin ◽

Bruce Eglington ◽

Dave Mattey ◽

...

Keyword(s):

Summer Monsoon ◽

East Asian Summer Monsoon ◽

Asian Monsoon ◽

East Asian Monsoon ◽

Asian Summer Monsoon ◽

East Asian ◽

Climatic Changes ◽

Decadal Scale ◽

Socotra Island ◽

Asian Summer

Stalagmite J1 from Jintanwan Cave, Hunan, China, provides a precisely dated, decadally resolved δ18O proxy record of paleoclimatic changes associated with the East Asian monsoon from ∽29.5 to 14.7 ka and from ∽12.9 to 11.0 ka. At the time of the last glacial maximum (LGM), the East Asian summer monsoon weakened and then strengthened in response to changes in Northern Hemisphere insolation. As the ice sheets retreated the East Asian summer monsoon weakened, especially during Heinrich event H1, when atmospheric and oceanic teleconnections transferred the climatic changes around the North Atlantic to the monsoonal regions of Eastern Asia. A depositional hiatus between ∽14.7 and 12.9 ka leaves the deglacial record incomplete, but an abrupt shift in δ18O values at ∽11.5 ka marks the end of the Younger Dryas and the transition into the Holocene. Comparisons of the J1 record to other Chinese speleothem records indicate synchronous climatic changes throughout monsoonal China. Further comparisons to a speleothem record from western Asia (Socotra Island) and to Greenland ice cores support hemispherical-scale paleoclimatic change. Spectral and wavelet analyses reveal centennial- and decadal-scale periodicities that correspond to solar frequencies and to oscillations in atmospheric and oceanic circulation.

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Trend and Cycle Analysis of Annual and Seasonal Precipitation in Liaoning, China

Advances in Meteorology ◽

10.1155/2016/5170563 ◽

2016 ◽

Vol 2016 ◽

pp. 1-15 ◽

Cited By ~ 3

Author(s):

Taotao Chen ◽

Guimin Xia ◽

Lloyd T. Wilson ◽

Wei Chen ◽

Daocai Chi

Keyword(s):

Time Scale ◽

Asian Summer Monsoon ◽

Periodic Variation ◽

Winter Precipitation ◽

Liaoning Province ◽

Annual Precipitation ◽

Sunspot Activity ◽

Seasonal Precipitation ◽

Specific Analysis ◽

Asian Summer

Annual and seasonal precipitation data for 49 meteorological stations over the period of 1960–2006 in Liaoning province were analyzed. Liaoning experienced province-wide decreases in precipitation over the 47-year period, with annual precipitation decreasing by 96% of the stations, followed by 92, 84, 63, and 27%, respectively, for summer, autumn, spring, and winter precipitation. Regional trend analysis confirmed the province-wide decrease, which was detected by the site-specific analysis, but a greater number of significant declines were found for annual, summer, and autumn precipitation for Liaoning province and for three of its four subregions. Four significant cycles with alternation patterns were detected mainly at the time scales of 3–5, 10-11, 20–23, and 31.2 years for each of the four subregions (Liaodong Peninsula, Northeastern Mountain, Western Highland, and Central Plain) and the entire Liaoning province, with the dominant periodicities being 10-11 years. The 10-11-year periodic variation of Liaoning annual precipitation was negatively associated with sunspot activity and positively associated with the East Asian Summer Monsoon (EASM) at the same time scale, while the 31.2-year periodic variation of Liaoning annual precipitation was positively correlated with both the EASM and ENSO activities at the 30–33-year time scale.

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Responses of the East Asian Summer Monsoon in the Low‐Latitude South China Sea to High‐Latitude Millennial‐Scale Climatic Changes During the Last Glaciation: Evidence From a High‐Resolution Clay Mineralogical Record

Paleoceanography and Paleoclimatology ◽

10.1029/2017pa003235 ◽

2018 ◽

Vol 33 (7) ◽

pp. 745-765 ◽

Cited By ~ 5

Author(s):

Shaohua Zhao ◽

Zhifei Liu ◽

Christophe Colin ◽

Yulong Zhao ◽

Xingxing Wang ◽

...

Keyword(s):

High Resolution ◽

South China Sea ◽

South China ◽

High Latitude ◽

Asian Summer Monsoon ◽

East Asian ◽

Climatic Changes ◽

Low Latitude ◽

Last Glaciation ◽

Asian Summer

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Link between East Asian summer monsoon and sedimentation in river-mouth sandbars since the early Holocene preserved in the Yangtze River subaqueous delta front

Quaternary Research ◽

10.1017/qua.2020.1 ◽

2020 ◽

Vol 95 ◽

pp. 84-96

Author(s):

Gang Xu ◽

Jian Liu ◽

Marcello Gugliotta ◽

Yoshiki Saito ◽

Lilei Chen ◽

...

Keyword(s):

Yangtze River ◽

Late Holocene ◽

Asian Summer Monsoon ◽

Yangtze River Basin ◽

River Mouth ◽

Early Holocene ◽

The Yangtze River ◽

Delta Front ◽

The Yangtze River Basin ◽

Asian Summer

AbstractThis paper presents geochemical and grain-size records since the early Holocene in core ECS0702 with a fine chronology frame obtained from the Yangtze River subaqueous delta front. Since ~9500 cal yr BP, the proxy records of chemical weathering from the Yangtze River basin generally exhibit a Holocene optimum in the early Holocene, a weak East Asian summer monsoon (EASM) period during the middle Holocene, and a relatively strong EASM period in the late Holocene. The ~8.2 and ~4.4 cal ka BP cooling events are recorded in core ECS0702. The flooding events reconstructed by the grain-size parameters since the early Holocene suggest that the floods mainly occurred during strong EASM periods and the Yangtze River mouth sandbar caused by the floods mainly formed in the early and late Holocene. The Yangtze River-mouth sandbars since the early Holocene shifted from north to south, affected by tidal currents and the Coriolis force, and more importantly, controlled by the EASM. Our results are of great significance for enriching both the record of Holocene climate change in the Yangtze River basin and knowledge about the formation and evolution progress of the deltas located in monsoon regions.

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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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