scholarly journals Co-evolutions of terrestrial temperature and seasonal precipitation from the latest Pleistocene to the mid-Holocene in Japan: carbonate clumped isotope record of a stalagmite

2021 ◽  
Author(s):  
Hirokazu Kato ◽  
Taiki Mori ◽  
Shota Amekawa ◽  
Chung-Che Wu ◽  
Chuan-Chou Shen ◽  
...  
Keyword(s):  
Temperature Effects ◽  
East Asian Winter Monsoon ◽  
Winter Monsoon ◽  
Time Intervals ◽  
Central Japan ◽  
The Holocene ◽  
Middle Holocene ◽  
Asian Winter Monsoon ◽  
Isotope Record ◽  
Clumped Isotope

Abstract Quantitative paleotemperature reconstruction is a challenging and important issue in terrestrial paleoenvironmental studies, for which carbonate clumped isotope (Δ47) thermometry is a promising approach. Here we analyzed Δ47 values from 68 layers of OT02 stalagmite from Ohtaki Cave in central Japan, covering two separate time intervals (2.6–8.8 and 34.8–63.5 ka) to reconstruct temperature and meteoric d18O records. The average Δ47 temperature of the Holocene portion of this stalagmite was 16.3℃ ± 5.6℃, 6.6℃ ± 7.2℃ higher than the average of the latest Pleistocene portion, which was 9.7℃ ± 4.6℃. Δ47 thermometry also revealed that the coldest intervals (5℃–10℃) correspond to the Heinrich cooling events H4–6, and the warmest interval (up to 19.9℃ ± 6.0℃) in middle Holocene (approximately 6–5 ka) accompanied by the Hypsithermal climate optimum. We also reconstructed past meteoric δ18O by subtracting the temperature effect from stalagmite δ18O. Average meteoric δ18O was less negative in the Holocene (8.22‰ ± 0.99‰ VSMOW) than in the latest Pleistocene (8.81‰ ± 0.84‰). Over centennial timescales, meteoric δ18O was more negative during colder periods, such as Heinrich cooling events and the cooling event around 7 ka, and less negative in warmer periods, such as Hypsithermal warming. These relations indicated co-evolution of terrestrial paleotemperature and paleoprecipitation. A temperature dependency of 18O fractionation from water to vapor is a likely reason for the negative correlation between temperature and meteoric δ18O. Additionally, it is possible that increasing lower δ18O precipitation from East Asian winter monsoon (EAWM) has decreased the averaged meteoric δ18O in colder periods. These temperature effects on meteoric δ18O occur in opposite directions to fractionation between water and the stalagmite δ18O, explaining the small amplitudes of changes observed in the δ18O of Japanese stalagmites.

scholarly journals Comment on “Asynchronous variation in the East Asian winter monsoon during the Holocene” by Xiaojian Zhang, Liya Jin, and Na Li

2016 ◽  
Vol 121 (4) ◽  
pp. 1611-1614 ◽  
Author(s):  
Harunur Rashid ◽  
Brittany Marche ◽  
Marli Vermooten ◽  
Devon Parry ◽  
Michaela Webb ◽  
...  
Keyword(s):  
East Asian Winter Monsoon ◽  
East Asian ◽  
Winter Monsoon ◽  
The Holocene ◽  
Asian Winter Monsoon

Grain size records reveal variability of the East Asian Winter Monsoon since the Middle Holocene in the Central Yellow Sea mud area, China

2012 ◽  
Vol 55 (10) ◽  
pp. 1656-1668 ◽  
Author(s):  
BangQi Hu ◽  
ZuoSheng Yang ◽  
MeiXun Zhao ◽  
Yoshiki Saito ◽  
DeJiang Fan ◽  
...  
Keyword(s):  
Grain Size ◽  
Yellow Sea ◽  
East Asian Winter Monsoon ◽  
East Asian ◽  
Winter Monsoon ◽  
Middle Holocene ◽  
Asian Winter Monsoon ◽  
Sea Mud ◽  
Mud Area

Eolian Quartz Flux to Lake Biwa, Central Japan, over the Past 145,000 Years

1997 ◽  
Vol 48 (1) ◽  
pp. 48-57 ◽  
Author(s):  
Jule Xiao ◽  
Yoshio Inouchi ◽  
Hisao Kumai ◽  
Shusaku Yoshikawa ◽  
Yoichi Kondo ◽  
...  
Keyword(s):  
Lake Biwa ◽  
East Asian Winter Monsoon ◽  
East Asian ◽  
Winter Monsoon ◽  
Central Japan ◽  
Chinese Loess ◽  
Asian Winter Monsoon ◽  
The Past ◽  
Source Regions ◽  
Quartz Flux

Eolian quartz flux (EQF, g cm−2(103 yr)−1) to Lake Biwa, central Japan, provides direct information on variations of the East Asian winter monsoon. Lake Biwa sediments spanning the past ca. 145,000 yr are characterized by two main periods when EQF values were significantly greater than 5.50 g cm−2(103 yr)−1, and two main intervals during which EQF values were lower. Two periods with EQF values >5.50 g cm−2(103 yr)−1occurred from ca. 145,000 to 125,000 and 73,000 to 13,000 yr B.P., while times of lower EQF values occurred from ca. 125,000 to 73,000 yr B.P. and around ca. 5500 yr B.P. Between ca. 125,000 and 73,000 yr B.P., three minimum EQF values and two intervening peaks of slightly higher EQF values are recorded. EQF increased markedly from ca. 73,000 to 13,000 yr B.P., whereas between ca. 53,000 and 20,000 yr B.P. the values recorded were relatively lower than those recorded during either the preceding or the subsequent episodes. The data imply that the East Asian winter monsoon strengthened during the periods when EQF values were high, and weakened during the intervals with low EQF values. The EQF record of Lake Biwa can be correlated with the grain-size record of the quartz fraction in Chinese loess and with the SPECMAP marine δ18O record. However, the EQF record apparently lags ca. 5000 yr behind the loess and δ18O records during stage 6/5 and 2/1 transitions and ca. 10,000 yr during stage 5/4 transition. These apparent lags could be due to problems with the chronology; alternatively, they may imply that the eolian quartz flux depended more on the extent of dust source regions than on wind intensity during these transitions.

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