Article
Geography, Physical
Francois Costard, Emmanuele Gautier, Pavel Konstantinov, Frederic Bouchard, Antoine Sejourne, Laure Dupeyrat, Alexander Fedorov
Summary: Recent evidence has shown that Arctic regions have warmed at twice the rate of other areas, and that high-latitude permafrost processes are highly responsive to rising temperatures. This study examines the thermal regime of islands in the Lena River floodplain. The results reveal significant heterogeneity in the permafrost conditions of the islands, with younger islands showing less susceptibility to permafrost formation.
PERMAFROST AND PERIGLACIAL PROCESSES
(2022)
Article
Geography, Physical
Zhizhong Sun, Shujuan Zhang, Guoyu Li, Guilong Wu, Yongzhi Liu
Summary: Thermokarst lakes are widely distributed in permafrost regions on the Qinghai-Tibet Plateau in China. Monitoring at a small alpine thermokarst lake in the Beiluhe Basin revealed the presence of permafrost beneath and around the lake, with thickening supra-permafrost taliks beneath the lake over time. Ground temperatures were higher beneath the lake compared to around it, with greater temperature increasing rates beneath the lake as well. The differences in ground temperatures between the lake bottom and natural ground surface are important for understanding thermal patterns beneath and around thermokarst lakes.
PERMAFROST AND PERIGLACIAL PROCESSES
(2021)
Article
Environmental Studies
Aleksandr Zhirkov, Petr Permyakov, Zhi Wen, Anatolii Kirillin
Summary: The effects of climate change, such as increased precipitation, can significantly impact ground temperatures, with a three-fold increase in rainfall potentially locally lowering temperatures, but resulting in a warming effect on a regional scale.
Article
Geosciences, Multidisciplinary
Adrian Melon-Nava, Javier Santos-Gonzalez, Jose Maria Redondo-Vega, Rosa Blanca Gonzalez-Gutierrez, Amelia Gomez-Villar
Summary: This study measured air and near-surface ground temperatures in a glacial cirque of the Cantabrian Mountains over a 14-year period. It analyzed the impact of snow cover and topographical features on temperature variations.
Article
Geography, Physical
Yanhui You, Qihao Yu, Xinbin Wang, Lei Guo, Kun Chen, Qingbai Wu
Summary: This study presents the results of a 7-year monitoring of ground temperature and deformation of a cast-in-place pile in the permafrost region along the Qinghai-Tibet Power Transmission Line. The study finds that thermosyphons can effectively cool the surrounding permafrost and shorten the refreezing time. Thermosyphons have a higher thermal conductivity, which mitigates the thermal effects of the concrete pile and significantly decreases the rate of active layer thickening around the pile. The results have important implications for the design and maintenance of cast-in-place piles in warm permafrost regions.
PERMAFROST AND PERIGLACIAL PROCESSES
(2022)
Article
Agronomy
Bart Schilperoort, Miriam Coenders-Gerrits, Cesar Jimenez Rodriguez, Antoon van Hooft, Bas van de Wiel, Hubert Savenije
Summary: This article discusses the importance of forests in water and carbon cycles and the challenges of accurately measuring their contribution at night, introducing the method of using Distributed Temperature Sensing (DTS) to detect temperature inversions and research findings.
AGRICULTURAL AND FOREST METEOROLOGY
(2022)
Article
Geosciences, Multidisciplinary
Jelte G. H. de Bruin, Victor F. Bense, Martine J. van der Ploeg
Summary: Comparison of numerical models with observed data revealed ranges of thermal properties in the active layer and significant differences in thickening rates under different error measures.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Environmental Sciences
Saqr Munassar, Guillaume Monteil, Marko Scholze, Ute Karstens, Christian Roedenbeck, Frank-Thomas Koch, Kai U. Totsche, Christoph Gerbig
Summary: This study analyzes the impact of atmospheric transport on estimating CO2 fluxes over Europe in 2018 using two atmospheric inversion systems. The main focus is to quantify the drivers of spread in CO2 estimates from atmospheric tracer inversions. The results show that differences in the mesoscale transport model contribute the most to the discrepancies in annual budget, followed by far-field contributions and the inversion systems. Varying the mesoscale transport leads to large discrepancies in spatial and temporal patterns, while changing the lateral boundary conditions result in more homogeneous impact. The choice of inversion system and prior error structure also have significant impacts on the CO2 estimates.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Geosciences, Multidisciplinary
Guoan Yin, Jing Luo, Fujun Niu, Zhanju Lin, Minghao Liu
Summary: This study revealed that ground temperatures of permafrost island on the Qinghai-Tibet Plateau were significantly higher compared to nearby marginal permafrost and continuous permafrost, showing a continuous increase over the past 8 years. The disappearance of the permafrost island in 2018 was attributed to the persistent increase in active-layer thickness, decrease in permafrost table depth, and anomalously high air temperatures in 2016 and 2017.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Environmental Sciences
Zhang Wei, Xiaoming Wang, Shen Yong-Ping, Yang Xue-Wen, Wu Yu-Wei, Chen An-An, Wu Xue-Jiao, Liu Shi-Wei, Yang Yang, Zhang Jing-Lin, Li Chen-Yu
Summary: The study investigates the contributions of cryospheric meltwater in China, focusing on the impact of different cryospheric elements on freshwater resources. It finds that the main contribution areas are located in northeastern China, the Qinghai-Tibet Plateau, and arid regions of Northwest China, playing important roles in various industries and ecosystems.
ADVANCES IN CLIMATE CHANGE RESEARCH
(2021)
Article
Environmental Sciences
Yuanzu Wang, Aldo Amodeo, Ewan J. O'Connor, Holger Baars, Daniele Bortoli, Qiaoyun Hu, Dongsong Sun, Giuseppe D'Amico
Summary: This study investigates the impact of atmospheric models on the retrieval of aerosol optical properties from lidar measurements, finding that reanalysis models are generally more accurate than forecast models. However, the delay in reanalysis data delivery limits their real-time applications. The influence of the models is more significant on the retrieval of aerosol extinction coefficients, with smaller impact on aerosol backscatter retrievals.
Article
Environmental Sciences
Yaping Chen, Ryan Kelly, Helene Genet, Mark Jason Lara, Melissa Lynn Chipman, A. David McGuire, Feng Sheng Hu
Summary: The study found that fire return interval has decreased significantly in Alaskan tundra ecosystems, impacting tundra carbon stocks. Simulation results indicate that there is pronounced carbon loss when the fire return interval shortens to a certain extent, especially for shrub tundra ecosystems.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Yinghong Qin, Tianyu Wang, Menglin Qin
Summary: Building roadways in permafrost regions is challenging due to construction and global warming inducing soil warming. Cooling techniques are used to cool the embankment and underlying permafrost, but understanding thermal storage in the soils is crucial. This study proposes a scalar Delta E to characterize soil thermal storage, finding temperature variation differs from thermal storage due to heat distribution in water-rich and water-poor soils, suggesting the need for permafrost cooling techniques to primarily drain thermal storage in water-rich soils.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2023)
Article
Meteorology & Atmospheric Sciences
Veli Yavuz
Summary: This study provides a detailed characterization of temperature inversions (TIs) and their subgroups in Istanbul between 2013 and 2022. The TIs were divided into four subgroups based on their bottom heights and analyzed using 7246 sounding reports. The study found that TIs were more frequently observed at night and had the highest frequency in September at 0000 UTC and in July at 1200 UTC. The analysis also revealed variations in inversion depths, strengths, and frequencies among the subgroups.
THEORETICAL AND APPLIED CLIMATOLOGY
(2023)
Article
Forestry
Amanda Hansson, Wen-Hsi Yang, Paul Dargusch, James Shulmeister
Summary: Numerous studies have shown that treelines are moving to higher elevations and latitudes, which is attributed to climate change. It is important to predict future treeline movements to understand their impacts on high-alpine ecosystems and potential climatic feedback mechanisms. Recent findings reveal that the rate of temperature change during autumn, particularly in October, is a significant predictor of treeline migration.
CURRENT FORESTRY REPORTS
(2023)
Article
Geography, Physical
H. B. O'Neill, C. R. Burn
PERMAFROST AND PERIGLACIAL PROCESSES
(2017)
Article
Geography, Physical
Stephen A. Wolfe, Peter D. Morse, Christina M. Neudorf, Steven V. Kokelj, Olav B. Lian, H. Brendan O'Neill
Article
Geology
Graham L. Gilbert, Hugh B. O'Neill, Wojciech Nemec, Christine Thiel, Hanne H. Christiansen, Jan-Pieter Buylaert
Article
Geosciences, Multidisciplinary
H. Brendan O'Neill, Hanne H. Christiansen
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2018)
Article
Environmental Sciences
Harneet K. Gill, Trevor C. Lantz, Brendan O'Neill, Steven V. Kokelj
ARCTIC ANTARCTIC AND ALPINE RESEARCH
(2014)
Article
Geosciences, Multidisciplinary
H. Brendan O'Neill, C. R. Burn
CANADIAN JOURNAL OF EARTH SCIENCES
(2012)
Article
Geography, Physical
H. Brendan O'Neill, Stephen A. Wolfe, Caroline Duchesne
Article
Ecology
H. Brendan O'Neill, Chris R. Burn