scholarly journals Glacier area and mass changes since 1964 in the Ala Archa Valley, Kyrgyz Ala-Too, northern Tien Shan

2015 ◽  
Vol 129 (01) ◽  
pp. 28-39 ◽  
Author(s):  
T. Bolch ◽  
◽  
Keyword(s):  
Tien Shan ◽  
Glacier Area ◽  
Northern Tien Shan

scholarly journals Assessment of Glacier Area Change in the Tekes River Basin, Central Tien Shan, Kazakhstan Between 1976 and 2013 Using Landsat and KH-9 Imagery

2016 ◽  
Author(s):  
Zamira Usmanova ◽  
Maria Shahgedanova ◽  
Igor Severskiy ◽  
Gennady Nosenko ◽  
Vassiliy Kapitsa
Keyword(s):  
River Basin ◽  
Tien Shan ◽  
Relative Reduction ◽  
Glacier Area ◽  
Uncertainty Of Measurement ◽  
Area Reduction ◽  
Glacier Recession ◽  
Significant Difference ◽  
Recession Rates ◽  
Northern Tien Shan

Abstract. Changes in glacierized area in the Kazakhstani sector of the Tekes River basin were assessed using Landsat and KH-9 imagery from 2013, 1992 and 1976. Between 1992 and 2013, the combined area of 118 glaciers declined from 121.4 ± 9.2 km2 to 105.0 ± 5.5 km2. The total area loss was 16.4 ± 5.9 km2 or 13.5 ± 7.5 %. The rate of area reduction was 0.78 km2 a-1 or 0.64 % a-1. This rate is lower than in other regions of northern Tien Shan because of the presence of several large glaciers in the sample. The combined glacier area in 2013 exceeds the combined glacier area reported by the RGI5.0/GAMDAM inventories for 1999–2003 by 24 % because the latter did not include glacierized areas on slopes exceeding 40° and a number of small glaciers. Changes in the recession rates between 1976, 1992 and 2013 were examined using a sub-sample of 28 glaciers which occupied 61% of the total glacierized area in 1992 and 64 % in 2013. These glaciers lost 8.3 ± 5.6 % in the 1976–1992 period, 8.4 ± 5.9 % in the 1992–2013 period and 16.0 ± 5.8 % between 1976 and 2013. The recession rates were 0.52 ± 0.35 % a-1 in 1976–1992 and 0.40 ± 0.28 % a-1 in 1992–2013 and although they appear to indicate a slow down in the glacier recession, the change in the retreat rates is within the uncertainty of measurement. The relative reduction in glacier area in the sub-sample is lower than for the basin as a whole because of a larger size of glaciers. Temperature increase was observed in all seasons reaching 0.18 °C per 10 years in summer and 0.39 °C per 10 years in autumn in the 1947–2015 period. Precipitation exhibited strong variability declining between 1952 and 1977 and then increasing until 2000s with a number of dry years in the 2010s. There was no statistically significant difference between the means of annual precipitation in the 1952–1977 and 1977–2015 periods. Combined with the nearly steady recession rates, this suggests that it is an increase in summer, late spring and early autumn temperature that drives glacier retreat.

Can the mass balance of the entire glacier area of the Tien Shan be estimated?

1992 ◽  
Vol 16 ◽  
pp. 173-179
Author(s):  
M.B. Dyurgerov ◽  
M.G. Kunakhovitch ◽  
V.N. Mikhalenko ◽  
A. M. Sokalskaya ◽  
V. A. Kuzmichenok
Keyword(s):  
Mass Balance ◽  
Vertical Profile ◽  
River Basins ◽  
Annual Runoff ◽  
Snow Accumulation ◽  
Tien Shan ◽  
Exponential Dependence ◽  
Glacier Area ◽  
Equilibrium Line Altitude ◽  
Boundary Area

The total area of glacierization of the Tien Shan in the boundary area of the USSR is about 8000 km2. The computation of mass balance was determined for this area in 12 river basins.In computation procedure, the vertical profile of snow accumulation in these regions and exponential dependence of variation of ablation with altitude are used. Thus the mass balance in each basin, bn, was calculated on the basis of these curves and represented in its relation with the equilibrium line altitude (ELA). It is shown that the relation ELA = f(bn) is linear when the range of bn values is close to zero, and in all altitude intervals this relation can be described by hypsographic curves, in all basins bn positive up to an ELA elevation of 3450 to 3500 m a.s.l. For average annual altitude of ELA, bn is negative for all regions. So the glaciers of these mountains add about 4 km3 of water to the total annual runoff.

scholarly journals High Mountain Asian glacier response to climate revealed by multi-temporal satellite observations since the 1960s

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Atanu Bhattacharya ◽  
Tobias Bolch ◽  
Kriti Mukherjee ◽  
Owen King ◽  
Brian Menounos ◽  
...  
Keyword(s):  
Mass Loss ◽  
River Flow ◽  
Tien Shan ◽  
High Mountain ◽  
Glacier Mass Balance ◽  
Temperature And Precipitation ◽  
Multi Temporal ◽  
The 1960S ◽  
Northern Tien Shan

AbstractKnowledge about the long-term response of High Mountain Asian glaciers to climatic variations is paramount because of their important role in sustaining Asian river flow. Here, a satellite-based time series of glacier mass balance for seven climatically different regions across High Mountain Asia since the 1960s shows that glacier mass loss rates have persistently increased at most sites. Regional glacier mass budgets ranged from −0.40 ± 0.07 m w.e.a−1 in Central and Northern Tien Shan to −0.06 ± 0.07 m w.e.a−1 in Eastern Pamir, with considerable temporal and spatial variability. Highest rates of mass loss occurred in Central Himalaya and Northern Tien Shan after 2015 and even in regions where glaciers were previously in balance with climate, such as Eastern Pamir, mass losses prevailed in recent years. An increase in summer temperature explains the long-term trend in mass loss and now appears to drive mass loss even in regions formerly sensitive to both temperature and precipitation.

Titanomagnetites and ilmenites from the Early Cenozoic basalts and limburgites of the Northern Tien Shan

2011 ◽  
Vol 47 (6) ◽  
pp. 475-487 ◽  
Author(s):  
A. F. Grachev ◽  
D. M. Pechersky ◽  
V. A. Tsel’movich
Keyword(s):  
Tien Shan ◽  
Early Cenozoic ◽  
Northern Tien Shan

Structure, age substantiation and tectonic setting of the Lower-Middle Ordovician volcanic-sedimentary and plutonic complexes of the western part of the Kyrgyz Range (Northern Tien Shan)

2012 ◽  
Vol 20 (4) ◽  
pp. 317-345 ◽  
Author(s):  
K. E. Degtyarev ◽  
T. Yu. Tolmacheva ◽  
A. V. Ryazantsev ◽  
A. A. Tret’yakov ◽  
A. S. Yakubchuk ◽  
...  
Keyword(s):  
Tectonic Setting ◽  
Tien Shan ◽  
Middle Ordovician ◽  
Northern Tien Shan

scholarly journals Geothermometry of Northern Tien Shan Thermal Waters (Issik-Kul Lake Basin)

2020 ◽  
Author(s):  
George Chelnokov ◽  
Vasily Lavrushin ◽  
Ivan Bragin ◽  
Abdulaziz Abdullaev ◽  
Natalia Kharitonova
Keyword(s):  
Tien Shan ◽  
Thermal Waters ◽  
Lake Basin ◽  
Northern Tien Shan

Empirical relationship between particulate matter and aerosol optical depth over Northern Tien-Shan, Central Asia

2012 ◽  
Vol 6 (2) ◽  
pp. 385-396 ◽  
Author(s):  
Boris B. Chen ◽  
Leonid G. Sverdlik ◽  
Sanjar A. Imashev ◽  
Paul A. Solomon ◽  
Jeffrey Lantz ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Central Asia ◽  
Aerosol Optical Depth ◽  
Optical Depth ◽  
Empirical Relationship ◽  
Tien Shan ◽  
Northern Tien Shan
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