Organochlorine pesticides (OCPs) in soils near and around Lake Son-Kul in the western Tian Shan Mountains, Central Asia

2018 ◽  
Vol 19 (4) ◽  
pp. 1685-1696 ◽  
Author(s):  
Qianyu Li ◽  
Jinglu Wu ◽  
Kadyrbek Sakiev
Keyword(s):  
Central Asia ◽  
Organochlorine Pesticides ◽  
Tian Shan Mountains ◽  
Tian Shan

Eutrema tianshanense (Brassicaceae), a new species from Tian Shan Mountains of central Asia

Phytotaxa ◽  
2016 ◽  
Vol 286 (1) ◽  
pp. 23 ◽  
Author(s):  
GUOQIAN HAO ◽  
IHSAN A. AL-SHEHBAZ ◽  
QIANLONG LIANG ◽  
QIAN WANG ◽  
JIANQUAN LIU
Keyword(s):  
New Species ◽  
Central Asia ◽  
Phylogenetic Analyses ◽  
Tibet Plateau ◽  
Long Distance ◽  
North Asia ◽  
Tian Shan Mountains ◽  
Qinghai Tibet Plateau ◽  
A New Species ◽  
Tian Shan

Eutrema tianshanense, a new species of Brassicaceae growing near to the permanent glaciation area in the Tian Shan Mountains of central Asia, is described. It is quite similar morphologically to E. heterophyllum, and E. racemosum from the Qinghai-Tibet Plateau and adjacent regions, and to E. edwardsii of Qinghai-Tibet Plateau, Central and North Asia, and northern North America, but with rounder and smaller leaves. In addition to its long-distance disjunction from the ranges of the above three species, phylogenetic analyses based on sequence variations of multiple chloroplast DNA markers and nuclear ITS suggested that E. tianshanense and these species represent two independently evolved lineages in Tian Shan Mountains and the Qinghai-Tibet Plateau. Their morphological similarities may have resulted from the same selection pressures in the alpine habitats where they grow.

scholarly journals The role of the westerlies and orography in Asian hydroclimate since the late Oligocene

Geology ◽  
2020 ◽  
Vol 48 (7) ◽  
pp. 728-732 ◽  
Author(s):  
Xin Wang ◽  
Barbara Carrapa ◽  
Yuchen Sun ◽  
David L. Dettman ◽  
James B. Chapman ◽  
...  
Keyword(s):  
Central Asia ◽  
Late Oligocene ◽  
Geological Evidence ◽  
Climate Simulations ◽  
Oxygen Isotopic ◽  
Tian Shan Mountains ◽  
Stable Oxygen ◽  
Soil Carbonates ◽  
Tian Shan

Abstract Interactions between midlatitude westerlies and the Pamir–Tian Shan mountains significantly impact hydroclimate patterns in Central Asia today, and they played an important role in driving Asian aridification during the Cenozoic. We show that distinct west-east hydroclimate differences were established over Central Asia during the late Oligocene (ca. 25 Ma), as recorded by stable oxygen isotopic values of soil carbonates. Our climate simulations show that these differences are present when relief of the Pamir–Tian Shan is higher than 75% of modern elevation (∼3000 m). Integrated with geological evidence, we suggest that a significant portion of the Pamir–Tian Shan orogen had reached elevations of ∼3 km and acted as a moisture barrier for the westerlies since ca. 25 Ma.

Uplift of the Pamir and Tian Shan set hydroclimate patterns in central Asia since the late Oligocene

2021 ◽  
Author(s):  
Xin Wang ◽  
Barbara Carrapa ◽  
Xu Zhang ◽  
Ilhomjon Oimuhammadzoda ◽  
Fahu Chen
Keyword(s):  
Central Asia ◽  
Climate Modeling ◽  
Isotope Geochemistry ◽  
Climate Modelling ◽  
Late Oligocene ◽  
Active Deformation ◽  
Sedimentary Sequences ◽  
Carbon And Oxygen Isotope ◽  
Tian Shan Mountains ◽  
Tian Shan

<p>The Cenozoic Asian aridification has been related to the retreat of the Paratethys, the uplift of the Tibet, and/or global cooling. However, the details of the mechanisms responsible for this paleoclimate shift remain poorly constrained. Modern observations indicate that interactions between mid-latitude westerlies and the Pamir-Tian Shan Mountains significantly impact hydroclimate patterns in central Asia today, and may have played an important role in driving Asian aridification during the Cenozoic. However, the timing when this topographic-atmospheric framework was established remains poorly constrained.</p><p>Here, we present magnetostratigraphy, U-Pb geochronology, thermochronology, paleoclimatology, stable carbon and oxygen isotope geochemistry, and climate modelling techniques to the Cenozoic sedimentary sequences in the Tajik Basin. Our results show that: 1) the penultimate and ultimate retreat of the Paratethys from central Asia occurred at ~41 and ~37.4 Ma, respectively; 2) the Pamirs have experienced active deformation and accelerated exhumation during the late Oligocene to early Miocene; 3) the windward (western) side of the Pamir and Tian Shan has been characterized by a wetter climate changes, whereas, the leeward (eastern) side of the orogen has been characterized by more arid conditions since the Late Oligocene; 4)  This distinct east-west hydroclimate differences, when integrated with climate modeling results, suggests that at least part of the Pamir-Tian Shan mountains had reached elevations ≥ 3 km and acted as a moisture barrier for the westerlies since ~25 Ma. We suggest that the interactions between the westerlies and the Pamir-Tian Shan orogen played an important role in driving Asian aridification since the Late Oligocene.</p>

Climate as the great equalizer of continental-scale erosion

2021 ◽  
Author(s):  
Gilby Jepson ◽  
Barbara Carrapa ◽  
Jack Gillespie ◽  
Ran Feng ◽  
Peter DeCelles ◽  
...  
Keyword(s):  
Central Asia ◽  
Regional Scale ◽  
Continental Scale ◽  
Active Tectonic ◽  
Tectonically Active ◽  
High Precipitation ◽  
Tectonic Boundaries ◽  
Great Equalizer ◽  
Tian Shan

<p>Central Asia is one of the most tectonically active and orographically diverse regions in the world and is the location of the highest topography on Earth resulting from major plate tectonic collisional events. Yet the role of tectonics versus climate on erosion remains one of the greatest debates of our time. We present the first regional scale analysis of 2526 published low-temperature thermochronometric dates from Central Asia spanning the Altai-Sayan, Tian Shan, Tibet, Pamir, and Himalaya. We compare these dates to tectonic processes (proximity to tectonic boundaries, crustal thickness, seismicity) and state-of-the-art paleoclimate simulations in order to constrain the relative influences of climate and tectonics on the topographic architecture and erosion of Central Asia. Predominance of pre-Cenozoic ages in much of the interior of central Asia suggests that significant topography was created prior to the India-Eurasia collision and implies limited subsequent erosion. Increasingly young cooling ages are associated with increasing proximity to active tectonic boundaries, suggesting a first-order control of tectonics on erosion. However, areas that have been sheltered from significant precipitation for extensive periods of time retain old cooling ages. This suggests that ultimately climate is the great equalizer of erosion. Climate plays a key role by enhancing erosion in areas with developed topography and high precipitation such as the Tian Shan and Altai-Sayan during the Mesozoic and the Himalaya during the Cenozoic. Older thermochronometric dates are associated with sustained aridity following more humid periods.</p>

A 426-year drought history for Western Tian Shan, Central Asia, inferred from tree rings and linkages to the North Atlantic and Indo–West Pacific Oceans

The Holocene ◽  
2013 ◽  
Vol 23 (8) ◽  
pp. 1095-1104 ◽  
Author(s):  
Feng Chen ◽  
Yu-jiang Yuan ◽  
Fa-Hu Chen ◽  
Wen-shou Wei ◽  
Shu-long Yu ◽  
...  
Keyword(s):  
Central Asia ◽  
Tree Rings ◽  
North Atlantic ◽  
West Pacific ◽  
The North ◽  
The North Atlantic ◽  
Tian Shan

scholarly journals Planation surfaces of the Tian Shan Range (Central Asia): Insight on several 100 million years of topographic evolution

2019 ◽  
Vol 177 ◽  
pp. 52-65 ◽  
Author(s):  
Julien Morin ◽  
Marc Jolivet ◽  
Laurie Barrier ◽  
Amandine Laborde ◽  
Haibing Li ◽  
...  
Keyword(s):  
Central Asia ◽  
Topographic Evolution ◽  
Planation Surfaces ◽  
Tian Shan
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