Regional controls on daily to interannual variations of precipitation isotope ratios in Southeast China: Implications for paleomonsoon reconstruction
Regional controls on daily to interannual variations of precipitation isotope ratios in Southeast China: Implications for paleomonsoon reconstruction
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中国东南地区降水同位素比值日变化和年际变化的区域控制：对古季风重建的影响
DOI：
10.1016/j.epsl.2019.115794
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发表时间：
2019-12
影响因子：
5.3
通讯作者：
Jian Yin
中科院分区：
文献类型：
--
作者：
Jiaoyang Ruan;Hongyu Zhang;Zhongyin Cai;Xiaoqiang Yang;Jian Yin
东亚许多重要的古季风记录依赖于过去降水同位素比率（δ 18o p）作为水文气候的代用物，然而，气候变率与δ 18o p之间的关系仍是一个争论不休的问题。本文利用广州8年的δ 18o p日记录和香港更新的GNIP数据，研究了中国东南部δ 18o p多时间尺度变化的主要气候驱动因素，并验证了积极讨论的假设。水汽源诊断分析表明，广州降水的主要水汽源主要来自南海北部近端。主要水汽源区的对流活动对不同时间尺度的δ 18o p变化具有重要的调节作用。这些影响可能与南海上空对流强度的直接变化或与水汽源转移相关的间接变化有关。因此，δ 18o p记录了与热带辐合带迁移和El Niño-Southern涛动（ENSO）有关的季节季风动力学。通过2015年强厄尔尼诺Niño事件对不同假设及其与ENSO之间联系的进一步检验支持了上述结论。综上所述，这些结果表明，中国东南部δ 18o p代表了从测量点到水汽源的降水和对流追踪的时空综合测量，为季风域古同位素资料的解释提供了启示。
Many key paleomonsoon records in East Asia rely on past precipitation isotope ratios (δ 18 O p) as proxies for hydroclimate, however, the relationship between climate variability and δ 18 O p remains an ongoing debate. Here we investigate dominant climatic drivers and test actively-discussed hypotheses of Southeast China δ 18 O p variability over multiple timescales, using an 8-yr-long daily δ 18 O p record from Guangzhou and updated GNIP dataset from Hong Kong. Our moisture source diagnostic analyses suggest that the primary moisture of Guangzhou precipitation essentially comes from the proximal northern South China Sea (SCS). Convective activities over the primary moisture source regions, measured by cumulative precipitation along back-trajectory, regional precipitation and outgoing longwave radiation, play a key role in regulating δ 18 O p variability across different timescales. These effects can be related to the direct changes of convection intensity over the SCS or the indirect changes associated with the shift of moisture source. In consequence, δ 18 O p records seasonal monsoon dynamics associated with the intertropical convergence zone migration and the El Niño-Southern Oscillation (ENSO). Further tests of different hypotheses and their links to the ENSO via the 2015 strong El Niño event support the above conclusions. Taken together, these results demonstrate that Southeast China δ 18 O p represents a spatial-temporally integrated measure of precipitation and convection tracing from the measured site to moisture sources, shedding light on the interpretation of paleo-isotope data in the monsoon domain.
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水汽来源和上游降水变化对降水稳定同位素的影响——以南京地区为例
影响因子：
6.3
作者：
Tang Y.;Pang H.;Zhang W.;Li Y.;Wu S.;Tang Y.;Hou S.;Wu S.;Hou S.
通讯作者：
Hou S.
研究印度和东亚季风区全新世期间古气候对降水ΔD和Δ18O的长期控制
影响因子：
12.1
作者：
Zhiguo Rao;Yunxia Li;Jiawu Zhang;Guodong Jia;Fahu Chen
通讯作者：
Fahu Chen
影响因子：
4.4
作者：
Sodemann, H.;Schwierz, C.;Wernli, H.
通讯作者：
Wernli, H.
DOI：
10.1002/2015jd024683
发表时间：
2016-07
期刊：
Journal of Geophysical Research: Atmospheres
影响因子：
--
作者：
H. Yang;K. Johnson;M. Griffiths;K. Yoshimura
通讯作者：
H. Yang;K. Johnson;M. Griffiths;K. Yoshimura
影响因子：
3.8
作者：
Daqing Yang;B. Ye;A. Shiklomanov
通讯作者：
Daqing Yang;B. Ye;A. Shiklomanov