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DOI | 10.1029/2020GL086985 |
What Causes the Postmonsoon O-18 Depletion Over Bay of Bengal Head and Beyond? | |
Cai, Zhongyin1,2; Tian, Lide1,2 | |
2020-02-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2020 |
卷号 | 47期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Modern observations from Bay of Bengal (BOB) head have shown that precipitation delta O-18 value reaches the lowest stage during late postmonsoon when the summer monsoon has weakened or retreated, complicating the traditional interpretation of low delta O-18 value as strong monsoon. We show that this postmonsoon O-18 depletion phenomenon exists from BOB periphery to the southeast and south Tibetan Plateau. Accumulative precipitation along back-trajectory still explains daily precipitation delta O-18 variability during both the monsoon and nonmonsoon, thus indicating that longer-term weighted-mean delta O-18 is biased toward synoptic conditions during precipitation events. Further, we propose that transport of moisture from the east (west) of the India-Burma Trough leads to depleted (enriched) delta O-18 during the postmonsoon (premonsoon). Our results reconcile the apparent contradiction but beg the consideration of potential bias and influence of different precipitation regimes in paleo archives. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000529120100088 |
WOS关键词 | INDIA-BURMA TROUGH ; ASIAN MONSOON ; SUMMER MONSOON ; ERA-INTERIM ; PRECIPITATION ; ISOTOPE ; CIRCULATION ; DELTA-O-18 ; RECORD ; CLIMATOLOGY |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/279678 |
专题 | 气候变化 |
作者单位 | 1.Yunnan Univ, Inst Int Rivers & Ecosecur, Kunming, Yunnan, Peoples R China; 2.Yunnan Key Lab Int Rivers & Transboundary Ecosecu, Kunming, Yunnan, Peoples R China |
推荐引用方式 GB/T 7714 | Cai, Zhongyin,Tian, Lide. What Causes the Postmonsoon O-18 Depletion Over Bay of Bengal Head and Beyond?[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(4). |
APA | Cai, Zhongyin,&Tian, Lide.(2020).What Causes the Postmonsoon O-18 Depletion Over Bay of Bengal Head and Beyond?.GEOPHYSICAL RESEARCH LETTERS,47(4). |
MLA | Cai, Zhongyin,et al."What Causes the Postmonsoon O-18 Depletion Over Bay of Bengal Head and Beyond?".GEOPHYSICAL RESEARCH LETTERS 47.4(2020). |
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