Methodology of the indirect temperature estimation basing on magnetotelluric data: Northern Tien Shan case study

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.

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

Izvestiya Physics of the Solid Earth ◽

10.1134/s106935131105003x ◽

2011 ◽

Vol 47 (6) ◽

pp. 475-487 ◽

Cited By ~ 4

Author(s):

A. F. Grachev ◽

D. M. Pechersky ◽

V. A. Tsel’movich

Keyword(s):

Tien Shan ◽

Early Cenozoic ◽

Northern Tien Shan

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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)

Stratigraphy and Geological Correlation ◽

10.1134/s0869593812030033 ◽

2012 ◽

Vol 20 (4) ◽

pp. 317-345 ◽

Cited By ~ 5

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

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A simple model to estimate ice ablation under a thick debris layer

Journal of Glaciology ◽

10.3189/172756506781828395 ◽

2006 ◽

Vol 52 (179) ◽

pp. 528-536 ◽

Cited By ~ 34

Author(s):

Han Haidong ◽

Ding Yongjing ◽

Liu Shiyin

Keyword(s):

Heat Flux ◽

Simple Model ◽

Iterative Procedure ◽

Indirect Comparison ◽

Tien Shan ◽

Balance Model ◽

Complex Phase ◽

Proposed Model ◽

Koxkar Glacier

AbstractThis paper presents a simple model to estimate ice ablation under a thick supraglacial debris cover. The key method employed in the model is to establish a link between the debris heat flux and the debris temperature at a certain depth when the heat transfer in the debris is described by a diffusion process. Given surface temperature, debris thermal properties and relevant boundary conditions, the proposed model can estimate mean debris temperature at interfaces of different debris layers using an iterative procedure, and then the heat flux for ice ablation. The advantage of the proposed model is that it only requires a few parameters to conduct the modeling, which is simpler and more applicable than others. The case study on Koxkar glacier, west Tien Shan, China, shows, in general, that the proposed model gives good results for the prediction of debris temperatures, except for an apparent phase shift between modeled and observed values. We suggest that this error is mainly due to complex phase relations between debris temperature and debris heat flux. The modeled ablation rates at three experimental sites also show good results, using a direct comparison with observed data and an indirect comparison with a commonly used energy-balance model.

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