Chinese stalagmite paleoclimate researches: A review and perspective

Cheng, Hai; Zhang, Haiwei; Zhao, Jingyao; Li, Hanying; Ning, Youfeng; Kathayat, Gayatri

doi:10.1007/s11430-019-9478-3

Cited by 117 publications

(113 citation statements)

References 165 publications

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“…The climatic significance of these records has been well explained in the aforementioned references. In short, the speleothem δ 18 O records from monsoon domains reflect the convective intensity of monsoon circulation (21,22), the Seso δ 18 O record from Spain is a temperature proxy similar to the Greenland ice-core δ 18 O record (20), and the Tonnel'naya δ 18 O record from Uzbekistan depicts changes in large-scale atmospheric circulation in the AW domain (18).…”

Section: Speleothem Samplesmentioning

confidence: 99%

Timing and structure of the Younger Dryas event and its underlying climate dynamics

Cheng

Zhang

Spötl

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

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154

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The Younger Dryas (YD), arguably the most widely studied millennial-scale extreme climate event, was characterized by diverse hydroclimate shifts globally and severe cooling at high northern latitudes that abruptly punctuated the warming trend from the last glacial to the present interglacial. To date, a precise understanding of its trigger, propagation, and termination remains elusive. Here, we present speleothem oxygen-isotope data that, in concert with other proxy records, allow us to quantify the timing of the YD onset and termination at an unprecedented subcentennial temporal precision across the North Atlantic, Asian Monsoon-Westerlies, and South American Monsoon regions. Our analysis suggests that the onsets of YD in the North Atlantic (12,870 ± 30 B.P.) and the Asian Monsoon-Westerlies region are essentially synchronous within a few decades and lead the onset in Antarctica, implying a north-to-south climate signal propagation via both atmospheric (decadal-time scale) and oceanic (centennial-time scale) processes, similar to the Dansgaard–Oeschger events during the last glacial period. In contrast, the YD termination may have started first in Antarctica at ∼11,900 B.P., or perhaps even earlier in the western tropical Pacific, followed by the North Atlantic between ∼11,700 ± 40 and 11,610 ± 40 B.P. These observations suggest that the initial YD termination might have originated in the Southern Hemisphere and/or the tropical Pacific, indicating a Southern Hemisphere/tropics to North Atlantic–Asian Monsoon-Westerlies directionality of climatic recovery.

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Section: Speleothem Samplesmentioning

confidence: 99%

Timing and structure of the Younger Dryas event and its underlying climate dynamics

Cheng

Zhang

Spötl

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

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154

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“…the Chinese Loess Plateau (e.g., [25,26]). Additionally, the recent carbon-isotope record of inorganic carbonate in Chinese loess (δ 13 C IC , a proxy of monsoon-induced vegetation density) also revealed a persistent precession periodicity which is nearly in-phase with Northern Hemisphere summer insolation [27]. Furthermore, the broad consistency between cave δ 18 O records across the vast Asian monsoon domain, including the ISM and EASM regions, precludes the attribution of orbital-scale shifts in cave δ 18 O predominantly to changes in moisture sources and pathways.…”

mentioning

confidence: 99%

“…Furthermore, the broad consistency between cave δ 18 O records across the vast Asian monsoon domain, including the ISM and EASM regions, precludes the attribution of orbital-scale shifts in cave δ 18 O predominantly to changes in moisture sources and pathways. For example, although an alternation in the moisture source between the proximal Pacific Ocean and the remote Indian Ocean can theoretically influence EASM cave records, it could not have simultaneously produced the broadly coherent Holocene pattern observed in cave δ 18 O records, including those from regions highly sensitive to the alternation in the moisture source (e.g., [4,13,28]).…”

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confidence: 99%

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Response to Comments by Daniel Gebregiorgis et al. “A Brief Commentary on the Interpretation of Chinese Speleothem δ18O Records as Summer Monsoon Intensity Tracers”. Quaternary 2020, 3, 7

et al. 2020

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“…The δ 18 O of meteoric precipitation, reflected by our speleothem δ 18 O, can be affected by many hydroclimatic factors (e.g., Cheng et al, 2019;Lachniet, 2009). Stable isotope analyses of meteoric water and groundwater collected from Wintimdouine cave site and the city of Agadir (~36 km away from Wintimdouine cave) between October 2014 and October 2015 show that the correlation between temperature and δ 18 O of precipitation is insignificant.…”

Section: Interpretation Of the δ 18 O Recordsmentioning

confidence: 92%

How Far North Did the African Monsoon Fringe Expand During the African Humid Period? Insights From Southwest Moroccan Speleothems

Sha

Brahim

Wassenburg

et al. 2019

Geophysical Research Letters

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We present new high-resolution oxygen isotope (δ 18 O) records from three NW African speleothems located at~31°N. The present-day rainfall patterns at 31°N in NW Africa are linked to negative winter North Atlantic Oscillation phases. However, on multimillennial time scales, our δ 18 O records, together with other hydroclimate records, provide new evidence of humid conditions during the mid-Holocene, a period that was presumably characterized by arid climate. Thus, the apparent increase in moisture during the mid-Holocene is interpreted better as an increase in summer rainfall. This is most likely linked to the expansion of the West African summer monsoon fringe during the African Humid Period, which terminated in our record abruptly around 4 Kyr BP. The temporospatial difference with speleothem records from N Morocco suggests that the High-Atlas Mountains might have been a topographic barrier to further expansion of the West African summer monsoon fringe into higher latitudes. Plain Language SummaryThe Holocene African Humid Period in North Africa, characterized by the expansion of vegetation into the Green Sahara, has been linked to the intensification of the West African summer monsoon (WASM). However, the temporospatial pattern of the African Humid Period, especially the northernmost expansion of the WASM, remain a matter of controversy, largely owing to the lack of precisely dated and high-resolution paleoclimatic records. This study presents new highresolution paleoclimate data based on speleothem oxygen isotope records from a key site at~31°N in NW Africa. Our data suggest that the WASM expanded to 31°N in NW Africa during the mid-Holocene and terminated abruptly at 4 Kyr BP.

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Chinese stalagmite paleoclimate researches: A review and perspective

Cited by 117 publications

References 165 publications

Timing and structure of the Younger Dryas event and its underlying climate dynamics

Timing and structure of the Younger Dryas event and its underlying climate dynamics

Response to Comments by Daniel Gebregiorgis et al. “A Brief Commentary on the Interpretation of Chinese Speleothem δ18O Records as Summer Monsoon Intensity Tracers”. Quaternary 2020, 3, 7

How Far North Did the African Monsoon Fringe Expand During the African Humid Period? Insights From Southwest Moroccan Speleothems

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