Article
Geosciences, Multidisciplinary
Lanfeng Bo, Zhanbin Li, Peng Li, Guoche Xu, Lie Xiao, Bo Ma
Summary: The study found that the maximum freezing depth of arbor land and shrub land was shallower than bare land, with arbor land showing higher freezing resistance. Additionally, the soil water content showed different characteristics during the freezing and thawing process. In comparison, shrub land had the most optimal distribution of soil moisture.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Engineering, Environmental
Mahsa Moradi, Eunsang Cho, Jennifer M. Jacobs, Carrie M. Vuyovich
Summary: Land surface modeling is used to study winter soil processes, but there is still uncertainty in the variability of simulated winter soil characteristics. This study used a nine-member ensemble to investigate the spatial and inter-annual variability of winter soil characteristics in North America. The ensemble consisted of three land surface models and three forcing datasets.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Bingbing Ding, Yonge Zhang, Xinxiao Yu, Guodong Jia, Yusong Wang, Pengfei Zheng, Zedong Li
Summary: Seasonal freeze-thawing has a significant impact on the movement and distribution of soil moisture, affecting the management of agroforestry. This study analyzed the differences in freeze-thawing between farmland and shelterbelt in arid and semi-arid regions of northern China. The results showed that the shelterbelt was more resistant to freezing, maintaining higher soil temperature and lower fluctuations in soil moisture compared to farmland. These findings provide valuable insights for developing appropriate management strategies for agriculture and forestry.
Article
Ecology
Shuainan Liu, Jiangqi Wu, Guang Li, Chuanjie Yang, Jianyu Yuan, Mingjun Xie
Summary: Soil carbon pools play a vital role in maintaining the stability of the carbon cycle and regulating climate change. This study investigated the variations of soil organic carbon, microbial biomass carbon, dissolved organic carbon, and easily oxidized organic carbon under different vegetation restoration types during seasonal freeze-thaw processes in a high-altitude region. The results showed that Xanthoceras sorbifolia vegetation had higher carbon contents compared to grassland and Caragana korshinskii vegetation, but lower sensitivity. The freeze-thaw process reduced microbial biomass carbon and increased dissolved organic carbon in the soil. Additionally, dissolved organic carbon and easily oxidized organic carbon accumulated during the freezing period and decreased during thawing. The study also revealed that soil carbon contents were higher in the surface soils, but the sensitivity to freeze-thaw processes differed among soil depths. Soil total nitrogen, temperature, total phosphorus, and soil water content were identified as important environmental factors influencing soil carbon pool fractions during freeze-thaw processes. Overall, this study highlights the importance of considering vegetation restoration types and seasonal freeze-thaw processes in managing soil carbon pools.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2022)
Article
Soil Science
Guopeng Wang, Qihua Ke, Keli Zhang, Yetong Li, Hongyuan Liu, Yue Yu, Qianhong Ma
Summary: Cultivation significantly affects the freeze-thaw process in soil, resulting in more intense freeze-thaw cycles, longer durations, and higher thermal transfer efficiency compared to uncultivated grassland and woodland.
SOIL & TILLAGE RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
Yun-Duo Zhao, Xia Hu
Summary: The freeze-thaw process affects microbial communities in alpine soils, but the microbial responses to seasonal freeze-thaw processes in deep soil have been neglected under climate change. This study collected microbial samples from three alpine meadows on the northeastern Qinghai-Tibet Plateau during four seasonal freeze-thaw periods and determined the taxa and biomass of living microbes. The results showed that the microbial biomass varied among different seasonal freeze-thaw periods and soil depths, and the main controlling factors were soil temperature, soil organic carbon, and total nitrogen.
Article
Construction & Building Technology
Haoran Qin, Yonghui Wang, Yanning Wang
Summary: This paper presents an innovative method using active magnesium oxide (MgO) and industrial waste fly ash to improve the strength of salt-bearing clay under freeze-thaw cycles. The combination of 8% active MgO and a combination of 4% active MgO and 4% fly ash demonstrated significant increases in ultimate strength by 14 and 12 times, respectively. The study found that the active MgO combined with fly ash solidifying method can offer a viable and sustainable solution for improving the strength of salt-bearing clay in areas with seasonal freeze-thaw cycles.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Agronomy
Briana M. Wyatt, Tyson E. Ochsner, Chris B. Zou
Summary: The study successfully estimated root zone soil moisture for diverse land cover types using a water balance model driven by high-resolution remote sensing and meteorological data. The model performed better than measured data and NASA-USDA soil moisture product, demonstrating the potential of integrating in-situ meteorological data and remotely sensed vegetation indices for accurate soil moisture estimation.
AGRICULTURAL AND FOREST METEOROLOGY
(2021)
Article
Chemistry, Physical
Jianwei Yue, Can Ma, Limin Zhao, Qingmei Kong, Xiangchun Xu, Zifa Wang, Ying Chen
Summary: This study investigates the effects of moisture content and freeze-thaw cycles on the quality, mechanical properties, and microstructure of gray bricks. The results provide insights into the damage mechanism and thermal stress distribution, which can contribute to the prevention and protection of frost damage in brick buildings.
Article
Environmental Sciences
Jacob Coppolino, Kimber E. Munford, Merrin Macrae, Susan Glasauer
Summary: Losses of phosphorus from soil to surface waters in agricultural areas have been linked to substantial declines in water quality. Riparian wetlands have the potential to intercept phosphorus before it reaches waterways, but their capacity to buffer against downstream losses of P is poorly understood. This study investigated phosphorus dynamics during the spring thaw to summer period and found that reactive phosphorus and microbial biomass phosphorus increased with distance from the river. Temperature monitoring showed no freeze-thaw cycling in the wetland soil. Experimental studies demonstrated that multiple freeze-thaw cycles were necessary to increase the pool of reactive soil phosphorus.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Environmental Sciences
Nai-Wen Hu, Hong-Wen Yu, Qi-Rong Wang, Guo-Peng Zhu, Xiu-Tao Yang, Tian-Ye Wang, Yang Wang, Quan-Ying Wang
Summary: Freeze-thaw action facilitates the mobilization of colloid-associated contaminants in soil. This study explores the potential influence mechanisms of autumn freeze-thaw (AFT) and spring freeze-thaw (SFT) on the generation and migration of colloids and colloid-associated cadmium (Cd) in soil.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Green & Sustainable Science & Technology
Yueyan Pan, Shijun Zhou, Zhen Li, Mingxiang Zhang, Zhenming Zhang
Summary: The effects of freeze-thaw on the hydrothermal process of peat bog soil and its relationship with physicochemical properties were studied using indoor simulated freeze-thaw experiments. The results showed that soil water content and temperature changed in the initial phase of freezing-thawing, and the unfrozen water content in soil decreased sharply in the stable freezing period. Compared with the freezing period, the fluctuation of soil moisture rate during thawing was more moderate with temperature change. Soil ammonium nitrogen content decreased with decreasing soil temperature and was significantly positively correlated with soil water content after freeze-thaw, while total phosphorus, fast-acting phosphorus, total nitrogen and nitrate showed no significant correlation with soil temperature and moisture content after freeze-thaw.
Article
Environmental Sciences
Jingyao Zheng, Tianjie Zhao, Haishen Lu, Defu Zou, Nemesio Rodriguez-Fernandez, Arnaud Mialon, Philippe Richaume, Jianshe Xiao, Jun Ma, Lei Fan, Peilin Song, Yonghua Zhu, Rui Li, Panpan Yao, Qingqing Yang, Shaojie Du, Zhen Wang, Zhiqing Peng, Yuyang Xiong, Zanpin Xing, Lin Zhao, Yann Kerr, Jiancheng Shi
Summary: Soil moisture and freeze/thaw (F/T) play a crucial role in water and heat exchanges at the land-atmosphere interface. This study reports the establishment of a wireless sensor network for soil moisture and temperature over the permafrost region of Tibetan Plateau. Satellite-based surface soil moisture (SSM) and F/T products were evaluated using ground-based measurements. The results show the reliability of L-band passive microwave SSM and F/T products, while existing F/T products display earlier freezing and later thawing, leading to unsatisfactory accuracy.
REMOTE SENSING OF ENVIRONMENT
(2024)
Article
Microbiology
Wenyan Li, Peter Semba Mosongo, Wenxu Dong, Arbindra Timilsina, Ruibo Sun, Fenghua Wang, Anna Walkiewicz, Binbin Liu, Chunsheng Hu
Summary: The effects of freeze-thaw cycles on N2O emissions in different soil types were investigated in this study. The results showed that the response to freeze-thaw cycles differed among soil types, and changes in the bacterial community structure may contribute to increased N2O emissions.
Article
Geosciences, Multidisciplinary
Zhaoxi Wang, Chen Cao, Qingbo Yu, Xin Xu, Qing Wang, Cencen Niu, Jiejie Shen, Mengxia Han, Huicheng Fu, Kuanxing Zhu, Jing Liu, Weitong Xia, Xun Sun
Summary: Hydraulic engineering has positive effects on agricultural production and soil desalination. However, freeze-thaw cycles can cause instability in canal slopes, emphasizing the need for effective deformation monitoring. The integration of multiple data sources is beneficial for identifying deformation risk in hydraulic engineering.
