Revised paleoaltimetry data show low Tibetan Plateau elevation during the Eocene

被引：188

作者：

Botsyun, Svetlana ^{[1
,2
]}

Sepulchre, Pierre ^{[1
]}

Donnadieu, Yannick ^{[1
,3
]}

Risi, Camille ^{[4
]}

Licht, Alexis ^{[5
]}

Rugenstein, Jeremy K. Caves ^{[6
,7
]}

机构：

[1] Univ Paris Saclay, Commissariat Energie Atom & Energies Alternat CEA, Univ Versailles St Quentin En Yvelines UVSQ, LSCE,IPSL,CNRS, Gif Sur Yvette, France

[2] Univ Tubingen, Dept Geosci, Tubingen, Germany

[3] Aix Marseille Univ, Ctr Rech & Enseignement Geosci Environm CEREGE, Coll France, CNRS,IRD, Aix En Provence, France

[4] Sorbonne Univ, Lab Meteorol Dynam, IPSL, CNRS, Paris, France

[5] Univ Washington, Dept Earth & Space Sci, Seattle, WA 98195 USA

[6] Stanford Univ, Dept Earth Syst Sci, Stanford, CA 94305 USA

[7] Swiss Fed Inst Technol, Dept Earth Sci, Zurich, Switzerland

来源：

SCIENCE | 2019年 / 363卷 / 6430期

关键词：

WATER ISOTOPES; METEORIC WATER; CENTRAL-ASIA; CLIMATE; UPLIFT; SENSITIVITY; PRECIPITATION; CIRCULATION; DYNAMICS; BASIN;

D O I：

10.1126/science.aaq1436

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

070301 [无机化学]; 070403 [天体物理学]; 070507 [自然资源与国土空间规划学]; 090105 [作物生产系统与生态工程];

摘要：

Paleotopographic reconstructions of the Tibetan Plateau based on stable isotope paleoaltimetry methods conclude that most of the Plateau's current elevation was already reached by the Eocene, similar to 40 million years ago. However, changes in atmospheric and hydrological dynamics affect oxygen stable isotopes in precipitation and may thus bias such reconstructions. We used an isotope-equipped general circulation model to assess the influence of changing Eocene paleogeography and climate on paleoelevation estimates. Our simulations indicate that stable isotope paleoaltimetry methods are not applicable in Eocene Asia because of a combination of increased convective precipitation, mixture of air masses, and widespread aridity. Rather, a model-data comparison suggests that the Tibetan Plateau only reached low to moderate (less than 3000 meters) elevations during the Eocene, reconciling oxygen isotope data with other proxies.

引用

页码：946 / +

页数：30

共 72 条

[1]

Aggarwal PK, 2016, NAT GEOSCI, V9, P624, DOI [10.1038/ngeo2739, 10.1038/NGEO2739]

[2]

Changing atmospheric CO2 concentration was the primary driver of early Cenozoic climate [J].