Results 91 to 100 of about 12,890 (223)

Policy implications of warming permafrost [PDF]

Permafrost is perennially frozen ground occurring in about 24% of the exposed land surface in the Northern Hemisphere. The distribution of permafrost is controlled by air temperature and, to a lesser extent, by snow depth, vegetation, orientation to ...

core  

Evidence of moisture control on the methylation of branched glycerol dialkyl glycerol tetraethers in semi-arid and arid soils [PDF]

, 2016
The distribution of bacterial branched glycerol dialkyl glycerol tetraethers (brGDGTs) is influenced by growth temperature and pH. This results in the widespread application of the brGDGT-based MBT(‘)/CBT proxy (MBT-methylation of branched tetraethers ...
Dang, Xinyue, Naafs, B. David A., Pancost, Richard D., Xie, Shucheng, Yang, Huan   +4 more
core   +2 more sources

Microstructure and γ′ phase evolution characteristics of novel nickel-based superalloy during compression

Journal of Materials Research and Technology
In this paper, the dynamic recrystallization (DRX) mechanism, texture evolution and the effect of γ ′on the microstructure evolution of a new nickel-based superalloy at 1075 °C and strain rate of 0.01 s−1 were systematically investigated.
Jianmin Cui, Yanzhuo Liu, Lingxiang Zhong, Xingyun Fan, Qianlong Ren, Hongqiang Du, Yongsheng Wei, Yingnan Shi, Xinmei Hou, Peipeng Jin, Jinhui Wang   +10 more
doaj   +1 more source

Accelerating thermokarst lake changes on the Qinghai–Tibetan Plateau

Scientific Reports
Abstract As significant evidence of ice-rich permafrost degradation due to climate warming, thermokarst lake was developing and undergoing substantial changes. Thermokarst lake was an essential ecosystem component, which significantly impacted the global carbon cycle, hydrology process and the stability of the ...
Guanghao Zhou, Wenhui Liu, Changwei Xie, Xianteng Song, Qi Zhang, Qingpeng Li, Guangyue Liu, Qing Li, Bingnan Luo   +8 more
openaire   +3 more sources

Terrestrial Water Storage Changes of Qinghai Lake on the Tibetan Plateau From Joint Inversion of GNSS and InSAR Data

Water Resources Research
Although geodetic techniques like Gravity Recovery and Climate Experiment have been widely applied to investigate terrestrial water storage (TWS) variations at regional or basin scales on the Tibetan Plateau (TP) caused by global warming, their coarse ...
Hai Zhu, Kejie Chen, Mingjia Li, Shunqiang Hu, Guoqing Zhang, Xingxing Kuang, Wenfeng Cui, Shengpeng Zhang, Junguo Liu   +8 more
doaj   +1 more source

Sustainable synthesis of jet fuel intermediate via cyclohexanone self-condensation over cost-effective magnesium silicate catalyst

Applied Catalysis O: Open
As a multifunctional catalytic material with high surface area, porous structure and tunable surface properties, magnesium silicate has important application value in the field of biomass conversion.
Guangxue Yang, Haojie Li, Dongliang Duan, Rui Feng, Mingjin Ma, Weiqiang Xiao   +5 more
doaj   +1 more source

Solar influenced late Holocene temperature changes on the northern Tibetan Plateau [PDF]

, 2013
Considerable efforts have been made to extend temperature records beyond the instrumental period through proxy reconstructions, in order to further understand the mechanisms of past climate variability.
An, ZS, He, YX, Hu, QH, Liu, WG, Liu, Y, Liu, ZH, Qin, XY, Wang, HY, Wang, Z, Zhao, C   +9 more
core   +2 more sources

Friction and Wear of Extrusion Dies Under Extreme Transient High-Temperature Conditions in the Extrusion of a Novel Nickel-Based High-Temperature Powder Alloy

Lubricants
During the extrusion of novel nickel-based powder superalloy bars, the die is subjected to elevated temperatures, high pressures, and severe friction, which readily lead to abrasive wear and thermal-fatigue damage.
Baizhi Sun, Jinhui Wang, Yanzhuo Liu, Kongyan Zhang, Yuhua Zhang, Zifeng Liu, Falin Zhang, Guangyun Duan, Hongqiang Du, Yongsheng Wei, Yingnan Shi, Xinmei Hou   +11 more
doaj   +1 more source

Environmental Efficiency and Its Determinants in China’s Regional Economies [PDF]

The increasing awareness of environmental protection has put great pressure on the improvement in environmental regulations in China. How has the current system performed in the nation’s rapidly growing economy?
Yanrui Wu
core   +1 more source

Ice Thickness Assessment of Non-Freshwater Lakes in the Qinghai–Tibetan Plateau Based on Unmanned Aerial Vehicle-Borne Ice-Penetrating Radar: A Case Study of Qinghai Lake and Gahai Lake

Remote Sensing
Ice thickness has a significant effect on the physical and biogeochemical processes of a lake, and it is an integral focus of research in the field of ice engineering.
Huian Jin, Xiaojun Yao, Qixin Wei, Sugang Zhou, Yuan Zhang, Jie Chen, Zhipeng Yu   +6 more
doaj   +1 more source