Tibetan Plateau Made Central Asian Drylands Move Northward, Concentrate in Narrow Latitudinal Bands, and Increase in Intensity During the Cenozoic
Tibetan Plateau Made Central Asian Drylands Move Northward, Concentrate in Narrow Latitudinal Bands, and Increase in Intensity During the Cenozoic
复制标题
DOI：
10.1029/2021gl093718
复制
发表时间：
2022-01
影响因子：
5.2
通讯作者：
Ran Zhang;Zhongshi Zhang;D. Jiang;G. Ramstein;G. Dupont‐Nivet;Xiangyu Li
中科院分区：
文献类型：
--
作者：
Ran Zhang;Zhongshi Zhang;D. Jiang;G. Ramstein;G. Dupont‐Nivet;Xiangyu Li
新生代中亚旱地演化是古气候研究的热点，但其机制尚不清楚。在这里，我们研究这个主题的气候建模的基础上，六个关键的地质时期。我们的研究结果表明，中亚旱地早在始新世就已存在，之后向北移动，变得越来越窄。虽然陆地-海洋分布的改变和大气CO2浓度的降低促进了旱地的干旱化，但它们对旱地的纬度位置影响很小。相比之下，亚洲高地形地区，特别是青藏高原（TP）的增长，使中亚旱地向北移动，集中在狭窄的纬度带，强度增加。模型-数据的定性一致性很好，表明亚洲内陆中纬度北纬140 °以北的逐步干旱化，早中新世抬升的主TP和北方TP可能迫使该地区形成旱地。
The evolution of central Asian drylands during the Cenozoic is a hot topic in paleoclimate research, but the underlying mechanism remains unclear. Here, we investigate this topic with climate modeling based on six key geological periods. Our results indicate that central Asian drylands have existed since the early Eocene, after which they move northward and become narrower. Although changed land‐sea distribution and decreased atmospheric CO2 concentration promote the aridification of drylands, they only slightly affect the latitudinal position of drylands. By comparison, the growth of Asian high‐topography areas, especially the Tibetan Plateau (TP), makes central Asian drylands move northward, concentrate in narrow latitudinal bands, and increase in intensity. Good model‐data qualitative agreement is obtained for stepwise aridification in midlatitude inland Asia north of ∼40°N, and the uplifted main and northern TP by the early Miocene likely forced drylands to form in this region.