Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL076253 |
Investigating the Direct Meltwater Effect in Terrestrial Oxygen-Isotope Paleoclimate Records Using an Isotope-Enabled Earth System Model | |
Zhu, Jiang1,2,3; Liu, Zhengyu4; Brady, Esther C.5; Otto-Bliesner, Bette L.5; Marcott, Shaun A.6; Zhang, Jiaxu7,8; Wang, Xianfeng9,10; Nusbaumer, Jesse11; Wong, Tony E.12; Jahn, Alexandra13,14; Noone, David15 | |
2017-12-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:24 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Singapore |
英文摘要 | Variations in terrestrial oxygen-isotope reconstructions from ice cores and speleothems have been primarily attributed to climatic changes of surface air temperature, precipitation amount, or atmospheric circulation. Here we demonstrate with the fully coupled isotope-enabled Community Earth System Model an additional process contributing to the oxygen-isotope variations during glacial meltwater events. This process, termed the direct meltwater effect, involves propagating large amounts of isotopically depleted meltwater throughout the hydrological cycle and is independent of climatic changes. We find that the direct meltwater effect can make up 15-35% of the O-18 signals in precipitation over Greenland and eastern Brazil for large freshwater forcings (0.25-0.50sverdrup (10(6) m(3)/s)). Model simulations further demonstrate that the direct meltwater effect increases with the magnitude and duration of the freshwater forcing and is sensitive to both the location and shape of the meltwater. These new modeling results have important implications for past climate interpretations of delta O-18. |
英文关键词 | direct meltwater effect oxygen-isotope records ice cores speleothem records meltwater |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000422954700055 |
WOS关键词 | ABRUPT CLIMATE-CHANGE ; THERMOHALINE CIRCULATION ; MILLENNIAL-SCALE ; ATLANTIC-OCEAN ; ICE ; GREENLAND ; DELTA-O-18 ; PRECIPITATION ; SIMULATIONS ; VARIABILITY |
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/26781 |
专题 | 气候变化 |
作者单位 | 1.Univ Wisconsin, Dept Atmospher & Ocean Sci, Madison, WI 53706 USA; 2.Univ Wisconsin, Ctr Climat Res, Madison, WI 53706 USA; 3.Univ Michigan, Dept Earth & Environm Sci, Ann Arbor, MI 48109 USA; 4.Ohio State Univ, Dept Geog, Atmospher Sci Program, Columbus, OH 43210 USA; 5.Natl Ctr Atmospher Res, Climate & Global Dynam Lab, POB 3000, Boulder, CO 80307 USA; 6.Univ Wisconsin, Dept Geosci, Madison, WI USA; 7.Los Alamos Natl Lab, CCS 2, Los Alamos, NM USA; 8.Los Alamos Natl Lab, CNLS, Los Alamos, NM USA; 9.Nanyang Technol Univ, Earth Observ Singapore, Singapore, Singapore; 10.Nanyang Technol Univ, Asian Sch Environm, Singapore, Singapore; 11.NASA, Goddard Inst Space Studies, New York, NY 10025 USA; 12.Univ Colorado, Dept Comp Sci, Boulder, CO 80309 USA; 13.Univ Colorado, Dept Atmospher & Ocean Sci, Boulder, CO 80309 USA; 14.Univ Colorado, Inst Arctic & Alpine Res, Boulder, CO 80309 USA; 15.Oregon State Univ, Coll Earth Ocean & Atmospher Sci, Corvallis, OR 97331 USA |
推荐引用方式 GB/T 7714 | Zhu, Jiang,Liu, Zhengyu,Brady, Esther C.,et al. Investigating the Direct Meltwater Effect in Terrestrial Oxygen-Isotope Paleoclimate Records Using an Isotope-Enabled Earth System Model[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(24). |
APA | Zhu, Jiang.,Liu, Zhengyu.,Brady, Esther C..,Otto-Bliesner, Bette L..,Marcott, Shaun A..,...&Noone, David.(2017).Investigating the Direct Meltwater Effect in Terrestrial Oxygen-Isotope Paleoclimate Records Using an Isotope-Enabled Earth System Model.GEOPHYSICAL RESEARCH LETTERS,44(24). |
MLA | Zhu, Jiang,et al."Investigating the Direct Meltwater Effect in Terrestrial Oxygen-Isotope Paleoclimate Records Using an Isotope-Enabled Earth System Model".GEOPHYSICAL RESEARCH LETTERS 44.24(2017). |
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