Article
Construction & Building Technology
Feng Wang, Lei Zhu, Luhua Zhang, Qixiang Yan, Yubing Huang, Feiyu Luo
Summary: The study found that in cold seasons during the construction of mountain tunnels, the significant temperature and humidity differences between the inside and outside of the tunnel can lead to fog formation, which affects construction safety. To address this issue, it is suggested to add insulation layers to the walls, and to control the inflow air relative humidity and wall temperature to prevent fog formation.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2021)
Article
Environmental Sciences
Marcela Rosas-Chavoya, Pablito Marcelo Lopez-Serrano, Jose Ciro Hernandez-Diaz, Christian Wehenkel, Daniel Jose Vega-Nieva
Summary: This study estimated the near-surface temperature lapse rate (NSTLR) in a mountain ecosystem in Northern Mexico for two seasons and found that it is influenced by aspect, local solar zenith angle (LSZA), and evaporative stress index (ESI). The highest NSTLR was observed in the Northwest and West aspects, while angles close to 90 degrees of LSZA were associated with lower NSTLR. Additionally, ESI values indicating less evaporative stress were related to lower NSTLR.
Article
Meteorology & Atmospheric Sciences
Hao Chen, Huiran Gao, Tiejun Wang, Wanchang Zhang, Xi Chen, Ning Nie, Haoran Liu
Summary: This study proposed an improved procedure for estimating gamma by combining sparse observations and newly released ERA5 reanalysis data, revealing the spatial heterogeneity in gamma over China and emphasizing the vital role played by vegetation covers in regulating local gamma. Furthermore, it was found that gamma in low altitude zones showed lower values but strong temporal fluctuations and contributed more to the interannual variability in gamma over China, mainly attributed to human activities.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2021)
Article
Environmental Sciences
Antonio-Juan Collados-Lara, Steven R. Fassnacht, Eulogio Pardo-Iguzquiza, David Pulido-Velazquez
Summary: This paper proposes a methodology to obtain high resolution air temperature fields by combining scarce point measurements with elevation data and land surface temperature (LST) data from remote sensing. Different geostatistical approaches were employed to assess the spatial variability of air temperature, with weighted kriging showing the best results. The methodology was evaluated using data from different seasons, with a mean squared error of 3.7 and 3.6 degrees C-2 for the application and validation, respectively.
Article
Geosciences, Multidisciplinary
Anna Haberkorn, Robert Kenner, Jeannette Noetzli, Marcia Phillips
Summary: The Swiss Alps are experiencing rising temperatures, increasing precipitation, and accelerating degradation of mountain permafrost, with ice-poor areas being particularly affected. Thicker active layers and prolonged thaw periods are observed, pointing towards ongoing permafrost degradation in the future.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Environmental Sciences
Md Ataullah Raza Khan, Shaktiman Singh, Pratima Pandey, Anshuman Bhardwaj, Sheikh Nawaz Ali, Vasudha Chaturvedi, Prashant Kumar Champati Ray
Summary: This study quantified the distribution of permafrost in the Western Himalaya using multisource satellite datasets, revealing a large portion of barren land and majority of the area with a mean annual air temperature below 1 degree Celsius. The research also showed high interannual variability in permafrost distribution and a significant decrease in permafrost cover from 2002 to 2020.
Article
Environmental Sciences
Guojie Hu, Lin Zhao, Tonghua Wu, Xiaodong Wu, Hotaek Park, Alexander Fedorov, Yufei Wei, Ren Li, Xiaofan Zhu, Zhe Sun, Jie Ni, Defu Zou
Summary: This study analyzed the variations and regional differences in air temperature from 1980 to 2018, showing that the warming rate in permafrost regions was higher than the global average, with significant differences between high latitude, transitional, and high altitude permafrost regions. Additionally, the results indicated different trends in freezing and thawing degree-days across different permafrost zones.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Svetlana Kalinicheva, Alyona A. Shestakova
Summary: Thermal infrared satellite imagery is increasingly used in permafrost studies, with Land Surface Temperature (LST) products being useful for classifying and mapping landscapes in permafrost regions. A new approach has been introduced in this study, utilizing LST as an additional criterion to identify frozen/un-frozen landscapes in regions where traditional morphological characteristics are not determinative. This approach has been applied to map permafrost natural-territorial complexes in Eastern Siberia, providing a more detailed and updated description of permafrost distribution in the study area.
JOURNAL OF MOUNTAIN SCIENCE
(2021)
Article
Meteorology & Atmospheric Sciences
A. C. Lute, John T. Abatzoglou
Summary: The study found that lapse rates estimated from small sample sizes or datasets with high noise or collinearity can have errors of several degrees C km(-1). Uncertainty in lapse rates can be reduced by correcting for spatial temperature gradients and restricting domains based on spatial clusters of stations. Simple linear regression was found to be more robust than multiple linear regression for lapse rate estimation.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2021)
Article
Environmental Sciences
Robert Sysolyatin, Sergei Serikov, Mikhail Zheleznyak, Mark Shatz, Yana Tikhonravova
Summary: This study provides a long-term temperature monitoring of the Russian Altai Mountains, exploring the temperature regime of permafrost areas in contrast to Mongolian and Chinese parts. The research found significant variation in mean annual ground temperature at different altitudes, and emphasized the importance of continued monitoring for assessing response to climate changes in the region.
JOURNAL OF MOUNTAIN SCIENCE
(2022)
Article
Meteorology & Atmospheric Sciences
Haodong Jin, Xiaoqing Peng, Oliver W. W. Frauenfeld, Yaohua Zhao, Xuanjia Li, Weiwei Tian, Cong Chen, Benben Liang, Xiaodong Li, Cuicui Mu
Summary: Surface air temperatures are important indicators of environmental and climatic change. A downscaling method based on elevation is applied to obtain high-resolution surface air temperatures in Northern Hemisphere permafrost regions, resulting in reduced errors compared to meteorological site data and gridded observations. Non-downscaled model projections overestimate in some permafrost regions and underestimate in others, with projected warming rates in permafrost regions being 1.4-1.6 times higher than in non-permafrost regions. Warming rates are also higher in high latitudes and continuous permafrost regions, as well as in permafrost regions with high ground ice content.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2023)
Article
Astronomy & Astrophysics
Xiaoqing Peng, Oliver W. Frauenfeld, Haodong Jin, Ran Du, Lina Qiao, Yaohua Zhao, Cuicui Mu, Tingjun Zhang
Summary: A study evaluated 10 commonly used gridded air temperature products on the Tibetan Plateau, finding that these products generally underestimate temperatures with noticeable root mean square errors. The China meteorological forcing data set showed the best comparison with observations.
EARTH AND SPACE SCIENCE
(2021)
Article
Environmental Sciences
Guojie Hu, Lin Zhao, Tonghua Wu, Xiaodong Wu, Hotaek Park, Ren Li, Xiaofan Zhu, Jie Ni, Defu Zou, Junming Hao, Wangping Li
Summary: This study evaluates the air temperature trends in the permafrost region of the Northern Hemisphere (PRONH) using CMIP6 models and observational data. The results show that there are variations in air temperature trends among different permafrost regions, and the greatest warming trends are observed in high-latitude permafrost regions under future scenarios.
Article
Environmental Studies
Pavel Konstantinov, Nikolai Basharin, Alexander Fedorov, Yoshihiro Iijima, Varvara Andreeva, Valerii Semenov, Nikolai Vasiliev
Summary: This paper presents the results of 30 years of permafrost thermal monitoring in the Tiksi area in the eastern Russian Arctic. The mean annual temperatures at a stone ridge site have increased by 1-2.4 degrees C compared to the first years of observations, with trends of degrees C/yr. The rate of increase has also increased in the last 20 years compared to the first decade of observations. At wet tundra sites in the foothill plain, the mean annual temperatures at the top of permafrost and the active layer thicknesses have also shown an increasing trend.
Article
Geography, Physical
Yun Qin, Guoyu Ren, Yunxin Huang, Panfeng Zhang, Kangmin Wen
Summary: This study accurately estimated the surface air temperature lapse rate (SATLR) in mainland China using the geographically weighted regression (GWR) model, and validated the model's accuracy and predictive ability. The results showed that the GWR model performed well in estimating SATLR and has potential wide application value in regions with complex terrain and climatic conditions.
JOURNAL OF GEOGRAPHICAL SCIENCES
(2021)