A review of orbital-scale monsoon variability and dynamics in East Asia during the Quaternary
A review of orbital-scale monsoon variability and dynamics in East Asia during the Quaternary
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第四纪东亚轨道尺度季风变率和动力学研究进展
DOI：
10.1016/j.quascirev.2022.107593
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发表时间：
2022-07
影响因子：
4
通讯作者：
Youbin Sun;Ting Wang;Q. Yin;A. Lyu;M. Crucifix;Yanjun Cai;L. Ai;S. Clemens;Z. An
中科院分区：
文献类型：
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作者：
Youbin Sun;Ting Wang;Q. Yin;A. Lyu;M. Crucifix;Yanjun Cai;L. Ai;S. Clemens;Z. An
东亚第四纪季风变化已通过大陆和海洋档案的代理记录进行了广泛的研究。然而，这些代理指标往往在趋势和节奏方面表现出有争议的特征，导致对轨道尺度季风动力学的理解令人困惑。在这里，我们通过将来自黄土、湖泊、洞穴和海洋记录的多个代理与 HadCM3 建模结果进行比较，回顾了东亚的轨道尺度季风变化和动态。黄土颗粒尺寸和海面温度的演化功率谱在中更新世过渡（MPT）期间表现出从 41 kyr 周期到 100 kyr 周期的显着转变，而其他代理记录（例如黄土碳酸盐的 δ13C、湖泊沉积物中的花粉浓度和海洋沉积物中的磁性矿物成分）显示出第四纪期间明显且持续的岁差周期，以及 MPT 后强烈的 100 kyr 周期。 HadCM3气候模型模拟表明，东亚地区轨道参数、冰量和CO2浓度对气温、降水和南风的影响存在季节和空间差异。在夏季，除华南夏季降水（20-30°N）外，轨道诱发日照对这三个气候变量的变化起着主导作用，而降水和气温的年变化则受到日照、冰量和CO2的共同影响。代理模型比较表明，一些陆基代理对夏季降水、年降水和年气温的变化很敏感，尽管它们对天文、冰和二氧化碳强迫的响应在中国南北之间差异很大。我们的代理模型比较表明，第四纪气候周期性的不同表达是由海洋和陆地代理对降水和温度的季节性和/或年度变化的不同敏感性以及温度和降水对日照和冰/二氧化碳强迫的不同响应引起的。我们建议，通过进一步将定量重建的古气温和降水数据与高分辨率区域气候模拟结果进行比较，可以加深对第四纪气候变化的认识。
Quaternary monsoon changes in East Asia have been extensively investigated by proxy records from continental and marine archives. However, these proxy indicators often show controversial characteristics in terms of trends and rhythms, leading to perplexedunderstanding of orbital-scale monsoon dynamics. Here we review the orbital-scale monsoon variability and dynamics in East Asia by comparing multiple proxies from loess, lake, speleothem, and marine records with the HadCM3 modeling result. Evolutionary power spectra of loess grain size and sea surface temperature exhibit a remarkable shift from 41- to 100-kyr cycles across the mid-Pleistocene transition (MPT), whereas other proxy records (e.g. δ13C of loess carbonate, pollen concentration in lake sediments, and magnetic mineral compositions in marine sediments) display distinct and persistent precession cycles through the Quaternary, along with strong 100-kyr cycles after the MPT. Simulations with the HadCM3 climate model reveal that the effects of orbital parameters, ice volume, and CO2concentration on the temperature, precipitation, and southerly winds are seasonally and spatially different in East Asia. In the summer season, orbitally induced insolation plays a dominant role in driving changes in these three climate variables except for summer precipitation in south China (20-30°N), whilst annual changes in precipitation and temperature are jointly affected by insolation, ice volume, and CO2. Proxy-model comparison suggests that several land-based proxies are sensitive to changes in summer precipitation, annual precipitation, and annual temperature, though their responses to astronomical, ice, and CO2forcing being quite different between north and south China. Our proxy-model comparison reveals that diverse expression of Quaternary climate periodicities was provoked by different sensitivities of marine and terrestrial proxies to seasonal and/or annual changes in precipitation and temperature, and by different responses of temperature and precipitation to insolation and ice/CO2forcing. We suggest that understanding of Quaternary climate change can be deepened by further comparison of quantitatively reconstructed paleotemperature and precipitation data with high-resolution regional climate modeling results.