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| Content Provider | Springer Nature Link |
|---|---|
| Author | Yang, XunLin Zhang, PingZhong Chen, FaHu Huh, Chih an Li, HongChun Cheng, Hai Johnson, Kathleen R. Liu, JingHua An, ChunLei |
| Copyright Year | 2007 |
| Abstract | An oxygen isotope record of a stalagmite from Huanglong Cave in the eastern Qinghai-Tibet Plateau dated with $^{230}$Th and $^{210}$Pb methods provides variations of the Asian monsoon with an average resolution of 1 year over the past 50 years. This study shows that the δ $^{18}$O of dripwater in the cave represents the annual mean δ $^{18}$O of local meteoric precipitation and the stalagmites were deposited in isotopic equilibrium. A comparison of the stalagmite δ $^{18}$O record with instrumentally meteorological data indicates that shifts of the δ $^{18}$O are largely controlled by the amount effect of meteoric precipitation conveyed through the southwest monsoon (the Indian monsoon) and less affected by temperature. Therefore, the variations of δ $^{18}$O record reflect the changes in monsoon precipitation on inter-annual time scales under the influence of the southwest monsoon. Like many other stalagmite δ $^{18}$O records in the Asian monsoon regions, the δ $^{18}$O record of the stalagmite from Huanglong Cave also reveals a gradually enriched trend during the past 50 years, i.e. relatively enriched in $^{18}$O. This trend may indicate the decline of the Asian monsoon intensity which is consistent with the decrease of monsoon indices. The weakening of the modern Asian monsoon well matched with the temperature changes in stratosphere, which may illustrate that the weakening of the monsoon mainly results from the lowering of solar radiation. |
| Starting Page | 1238 |
| Ending Page | 1247 |
| Page Count | 10 |
| File Format | |
| ISSN | 10016538 |
| Journal | Chinese Science Bulletin |
| Volume Number | 52 |
| Issue Number | 9 |
| e-ISSN | 18619541 |
| Language | English |
| Publisher | Science in China Press |
| Publisher Date | 2007-01-01 |
| Publisher Place | Beijing |
| Access Restriction | Subscribed |
| Subject Keyword | stalagmite oxygen isotopic composition Asian monsoon high-resolution Qinghai-Tibet Plateau Science Physics Chemistry/Food Science Life Sciences Geosciences Engineering |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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