Cryogenic cave carbonates in the Dolomites (northern Italy): insights into Younger Dryas cooling and seasonal precipitation
文献类型：期刊论文
| 作者 | Koltai, Gabriella1; Spoetl, Christoph1; Jarosch, Alexander H.2; Cheng, Hai3,4,5 |
| 刊名 | CLIMATE OF THE PAST
 |
| 出版日期 | 2021-04-06 |
| 卷号 | 17期号:2页码:775-789 |
| ISSN号 | 1814-9324 |
| DOI | 10.5194/cp-17-775-2021 |
| 通讯作者 | Koltai, Gabriella(gabriella.koltai@uibk.ac.at) |
| 英文摘要 | In the European Alps, the Younger Dryas (YD) was characterised by the last major glacier advance, with equilibrium line altitudes being similar to 220 to 290 m lower than during the Little Ice Age, and also by the development of rock glaciers. Dating of these geomorphic features, however, is associated with substantial uncertainties, leading to considerable ambiguities regarding the internal structure of this stadial, which is the most intensively studied one of the last glacial period. Here, we provide robust physical evidence based on Th-230-dated cryogenic cave carbonates (CCCs) from a cave located at 2274 m a.s.l. in the Dolomites of northern Italy coupled with thermal modelling, indicating that early YD winters were only moderately cold in this part of the Alps. More precisely, we find that the mean annual air temperature dropped <= 3 degrees C at the Allerod-YD transition. Our data suggest that autumns and early winters in the early part of the YD were relatively snow-rich, resulting in stable winter snow cover. The latter insulated the shallow subsurface in winter and allowed the cave interior to remain close to the freezing point (0 degrees C) year-round, promoting CCC formation. The main phase of CCC precipitation at similar to 12.2 ka coincided with the mid-YD transition recorded in other archives across Europe. Based on thermal modelling we propose that CCC formation at similar to 12.2 ka was most likely associated with a slight warming of approximately +1 degrees C in conjunction with drier autumns and early winters in the second half of the YD. These changes triggered CCC formation in this Alpine cave as well as ice glacier retreat and rock glacier expansion across the Alps. |
| 资助项目 | Autonome Provinz Bozen-Sudtirol (Amt fur Wissenschaft und Forschung)[(3/34)] ; Autonome Provinz Bozen-Sudtirol (Amt fur Wissenschaft und Forschung)[WF-F.16947/5-2019] |
| WOS研究方向 | Geology ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| 出版者 | COPERNICUS GESELLSCHAFT MBH |
| WOS记录号 | WOS:000638138000002 |
| 资助机构 | Autonome Provinz Bozen-Sudtirol (Amt fur Wissenschaft und Forschung) |
| 源URL | [http://ir.ieecas.cn/handle/361006/16305]  |
| 专题 | 地球环境研究所_黄土与第四纪地质国家重点实验室（2010~） |
| 通讯作者 | Koltai, Gabriella |
| 作者单位 | 1.Univ Innsbruck, Inst Geol, Innrain 52d, A-6020 Innsbruck, Austria 2.ThetaFrame Solut, Horfarterstr 14, A-6330 Kufstein, Austria 3.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian, Peoples R China 4.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Peoples R China 5.Univ Minnesota, Dept Earth Sci, Minneapolis, MN USA |
| 推荐引用方式 GB/T 7714 | Koltai, Gabriella,Spoetl, Christoph,Jarosch, Alexander H.,et al. Cryogenic cave carbonates in the Dolomites (northern Italy): insights into Younger Dryas cooling and seasonal precipitation[J]. CLIMATE OF THE PAST,2021,17(2):775-789. |
| APA | Koltai, Gabriella,Spoetl, Christoph,Jarosch, Alexander H.,&Cheng, Hai.(2021).Cryogenic cave carbonates in the Dolomites (northern Italy): insights into Younger Dryas cooling and seasonal precipitation.CLIMATE OF THE PAST,17(2),775-789. |
| MLA | Koltai, Gabriella,et al."Cryogenic cave carbonates in the Dolomites (northern Italy): insights into Younger Dryas cooling and seasonal precipitation".CLIMATE OF THE PAST 17.2(2021):775-789. |
入库方式： OAI收割
来源：地球环境研究所
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