Consistent long‐term Holocene warming trend at different elevations in the Altai Mountains in arid central Asia

2020 ◽  
Vol 35 (8) ◽  
pp. 1036-1045
Author(s):  
Zhiguo Rao ◽  
Haichun Guo ◽  
Jiantao Cao ◽  
Fuxi Shi ◽  
Guodong Jia ◽  
...  
Keyword(s):  
Central Asia ◽  
Warming Trend ◽  
Altai Mountains ◽  
Arid Central Asia

Long-term summer warming trend during the Holocene in central Asia indicated by alpine peat α-cellulose δ13C record

2019 ◽  
Vol 203 ◽  
pp. 56-67 ◽  
Author(s):  
Zhiguo Rao ◽  
Chao Huang ◽  
Luhua Xie ◽  
Fuxi Shi ◽  
Yan Zhao ◽  
...  
Keyword(s):  
Central Asia ◽  
Warming Trend ◽  
The Holocene ◽  
Summer Warming

Holocene moisture variations in the Arid Central Asia: New evidence from the southern Altai Mountains of China

2020 ◽  
Vol 735 ◽  
pp. 139545 ◽  
Author(s):  
Dongliang Zhang ◽  
Xi Chen ◽  
Yaoming Li ◽  
Min Ran ◽  
Yunpeng Yang ◽  
...  
Keyword(s):  
Central Asia ◽  
Altai Mountains ◽  
Arid Central Asia ◽  
New Evidence

Quantification of long-term and time-integrated glaciation patterns in Central Asia

2020 ◽  
Author(s):  
Robin Blomdin ◽  
Arjen P Stroeven ◽  
Jonathan M Harbor ◽  
Clas Hättestrand ◽  
Jakob Heyman ◽  
...  
Keyword(s):  
Central Asia ◽  
Altai Mountains ◽  
Glacial Cycles ◽  
Spatial Gradients ◽  
Area Of Interest ◽  
Digital Elevation ◽  
Topographic Barriers ◽  
Glacial Landforms ◽  
Tian Shan

<p>We use a domain-wide geomorphometric analysis to investigate spatial patterns of glacial landforms. We focus or analysis on glacial depositional landforms (e.g. marginal moraines), as well as larger erosional landforms (e.g. glacial valleys), because our aim is to quantify long-term and time-integrated glaciation patterns. Our area of interest includes two large orogens in Central Asia; the Tian Shan and Altai mountains, both located in the continental interior of Central Asia. Our analysis is crucial as it can reveal the importance of 1) topographic barriers, 2) precipitation gradients and 3) rain-shadow effects on former glaciation patterns. We focus our analysis on six different physiographic regions (n=6), defined by major drainage divides, as well as for formerly glaciated catchments (n=21)—selected because they are intersected by cosmogenic-nuclide glacial-chronological datasets. We mine published datasets on the distribution of glaciers and glacial landforms, and use these datasets, together with freely available digital elevation models, to extract landform-specific hypsometric (area—elevation) distributions. Hypsometric peaks for modern glaciers (i.e. median glacier elevations) show pronounced spatial gradients; increasing elevations from the northern to the southern Tian Shan, and increasing median elevations from the northern to both the southeastern and southwestern Altai Mountains. This is interpreted to reflect topographic barrier effects and decreasing modern precipitation rates (i.e. increasing continentality), as a result of a weakening of the Mid-latitude Westerlies, across the main axes of the two mountain systems. A similar pattern can be observed in the paleorecord; reconstructed long-term and time-integrated glaciation patterns, also show pronounced spatial gradients, equivalent to modern median glacier elevation patterns. This observation indicates that during former periods of glaciation, maximum paleoglacier extents—reconstructed by delineating the extent of glacial depositional and erosional landforms (formed over one-to-several glacial cycles, over >100 thousand years)—were correspondingly controlled by a westerly-sourced moisture supply, and was thus affected by precipitation patterns similar to those of today.</p>

Peat brGDGTs-based Holocene temperature history of the Altai Mountains in arid Central Asia

2020 ◽  
Vol 538 ◽  
pp. 109464 ◽  
Author(s):  
Dandan Wu ◽  
Jiantao Cao ◽  
Guodong Jia ◽  
Haichun Guo ◽  
Fuxi Shi ◽  
...  
Keyword(s):  
Central Asia ◽  
Temperature History ◽  
Altai Mountains ◽  
Arid Central Asia ◽  
History Of

scholarly journals The Radial Growth of Schrenk Spruce (Picea schrenkiana Fisch. et Mey.) Records the Hydroclimatic Changes in the Chu River Basin over the Past 175 Years

Forests ◽  
2019 ◽  
Vol 10 (3) ◽  
pp. 223 ◽  
Author(s):  
Ruibo Zhang ◽  
Bakytbek Ermenbaev ◽  
Tongwen Zhang ◽  
Mamtimin Ali ◽  
Li Qin ◽  
...  
Keyword(s):  
Central Asia ◽  
River Basin ◽  
Radial Growth ◽  
Water Resource Management ◽  
Drought Severity ◽  
Tree Ring Chronology ◽  
Picea Schrenkiana ◽  
Arid Central Asia ◽  
Western Tianshan

The Chu River is one of the most important rivers in arid Central Asia. Its discharge is affected by climate change. Here, we establish a tree-ring chronology for the upper Chu River Basin and analyze the relationships between radial growth, climate, and discharge. The results show that the radial growth of Schrenk spruce (Picea schrenkiana Fisch. et Mey.) is controlled by moisture. We also reconstruct a 175-year standardized precipitation-evapotranspiration index (SPEI) for the Chu River Basin. A comparison of the reconstructed and observed indices reveal that 39.5% of the variance occurred during the calibration period of 1952–2014. The SPEI reconstruction and discharge variability of the Chu River show consistent long-term change. They also show that the Chu River Basin became increasingly dry between the 1840s and the 1960s, with a significant drought during the 1970s. A long and rapid wetting period occurred between the 1970s and the 2000s, and was followed by increasing drought since 2004. The change in the SPEI in the Chu River Basin is consistent with records of long-term precipitation, SPEI and Palmer Drought Severity Indices (PDSI) in other proximate regions of the western Tianshan Mountains. The hydroclimatic change of the Chu River Basin may be associated with westerly wind. This study is helpful for disaster prevention and water resource management in arid central Asia.

The Elachistidae of southern Siberia and Central Asia, with descriptions of five new species (Lepidoptera)¹

1992 ◽  
Vol 3 (4) ◽  
pp. 177-194 ◽  
Author(s):  
Lauri Kaila
Keyword(s):  
New Species ◽  
Central Asia ◽  
Baikal Region ◽  
Tianshan Mountains ◽  
Previous Literature ◽  
Altai Mountains ◽  
Southern Siberia

The Elachistidae material collected during the joint Soviet-Finnish entomological expeditions to the Altai mountains, Baikal region and Tianshan mountains of the previous USSR is listed. Previous literature dealing with the Elachistidae in Central Asia is reviewed. A total of 40 species are dealt with, including descriptions of five new species: Stephensia jalmarella sp. n. (Altai), Elachista baikalica sp. n. (Baikal), E. talgarella sp. n. (southern Kazakhstan), E. esmeralda sp. n. (southern Kazakhstan) and E. filicornella sp. n. (southern Kazakhstan). The previously unknown females of E. bimaculata Parenti, 1981 and Biselachista zonulae Sruoga, 1992 are described.

scholarly journals Frontier Dynamics: Reflections on Evangelical and Tablighi Missions in Central Asia

2021 ◽  
Vol 63 (1) ◽  
pp. 212-241
Author(s):  
Mathijs Pelkmans
Keyword(s):  
Soviet Union ◽  
Central Asia ◽  
Kyrgyz Republic ◽  
Missionary Work ◽  
Ethnographic Fieldwork ◽  
The Soviet Union ◽  
Successes And Failures

AbstractMissionaries have flocked to the Kyrgyz Republic ever since the collapse of the Soviet Union. Evangelical-Pentecostal and Tablighi missions have been particularly active on what they conceive of as a fertile post-atheist frontier. But as these missions project their message of truth onto the frontier, the dangers of the frontier may overwhelm them. Based on long-term ethnographic fieldwork amongst foreign and local Tablighis and evangelical-Pentecostals, this article formulates an analytic of the frontier that highlights the affective and relational characteristics of missionary activities and their effects. This analytic explains why and how missionaries are attracted to the frontier, as well as some of the successes and failures of their expansionist efforts. In doing so, the article reveals the potency of instability, a feature that is particularly evident in missionary work, but also resonates with other frontier situations.

Radial growth responses of two dominant conifers to climate in the Altai Mountains, Central Asia

2021 ◽  
Vol 298-299 ◽  
pp. 108297
Author(s):  
Jian Kang ◽  
Shaowei Jiang ◽  
Jacques C. Tardif ◽  
Hanxue Liang ◽  
Shaokang Zhang ◽  
...  
Keyword(s):  
Central Asia ◽  
Radial Growth ◽  
Altai Mountains ◽  
Growth Responses

scholarly journals Cities Exacerbate Climate Warming

Urban Science ◽  
2021 ◽  
Vol 5 (1) ◽  
pp. 27
Author(s):  
Lahouari Bounoua ◽  
Kurtis Thome ◽  
Joseph Nigro
Keyword(s):  
Surface Temperature ◽  
Land Surface ◽  
Large Scale ◽  
Climate Models ◽  
Warming Trend ◽  
Climate Mitigation ◽  
Temperature Changes ◽  
Surface Warming ◽  
The Us

Urbanization is a complex land transformation not explicitly resolved within large-scale climate models. Long-term timeseries of high-resolution satellite data are essential to characterize urbanization within land surface models and to assess its contribution to surface temperature changes. The potential for additional surface warming from urbanization-induced land use change is investigated and decoupled from that due to change in climate over the continental US using a decadal timescale. We show that, aggregated over the US, the summer mean urban-induced surface temperature increased by 0.15 °C, with a warming of 0.24 °C in cities built in vegetated areas and a cooling of 0.25 °C in cities built in non-vegetated arid areas. This temperature change is comparable in magnitude to the 0.13 °C/decade global warming trend observed over the last 50 years caused by increased CO2. We also show that the effect of urban-induced change on surface temperature is felt above and beyond that of the CO2 effect. Our results suggest that climate mitigation policies must consider urbanization feedback to put a limit on the worldwide mean temperature increase.

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