Article
Geosciences, Multidisciplinary
Michael P. Vermeuel, Patricia A. Cleary, Ankur R. Desai, Timothy H. Bertram
Summary: The study reveals a significant contribution of nonstomatal pathways in canopy to the dry deposition of O-3, which is not correctly captured in current models. Stomatal uptake and estimated absorption only explain a small portion of O-3 loss.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Environmental Sciences
Zan Liu, Yuepeng Pan, Tao Song, Bo Hu, Lili Wang, Yuesi Wang
Summary: This study presented the first eddy covariance measurements of ozone flux at different heights in a Chinese forest, revealing that ozone flux and deposition velocity were higher above the canopy compared to below, with stomatal uptake playing an important role in ozone deposition. Ozone deposition velocity increased with air temperature, relative humidity, photosynthetically active radiation, and friction velocity, but tended to plateau when these meteorological factors exceeded their optimal values.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Geosciences, Multidisciplinary
P. L. Fung, U. Rannik, I. Mammarella, T. Vesala
Summary: This study investigated ozone deposition over lakes in Finland using the eddy covariance technique. The results showed that ozone deposition velocity was higher during nighttime, which was related to enhanced convective mixing in the uppermost water layers. Waterside convective mixing enhanced ozone deposition, while wind speed and friction velocity had minor impacts on deposition.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Agronomy
Xuehui Guo, Da Pan, Ryan W. Daly, Xi Chen, John T. Walker, Lei Tao, James McSpiritt, Mark A. Zondlo
Summary: This study utilized two fast-response NH3 sensors to measure NH3 fluxes in a forest and grassland in North Carolina and observed significant differences in NH3 exchange under different vegetation and biogeochemical conditions. NH3 fluxes displayed diurnal variations and varied ranges in different environmental conditions.
AGRICULTURAL AND FOREST METEOROLOGY
(2022)
Article
Agronomy
Mika Korkiakoski, Paavo Ojanen, Juha-Pekka Tuovinen, Kari Minkkinen, Olli Nevalainen, Timo Penttila, Mika Aurela, Tuomas Laurila, Annalea Lohila
Summary: The wide-spread harvesting of forests on drained peatlands in Finland has raised concerns about its impact on carbon dioxide emissions and climate change. A study conducted in a mature peatland forest in southern Finland compared the impact of clear-cutting and partial cutting on CO2 exchange. The results showed that partial cutting resulted in significantly lower CO2 emissions in the short term, while clear-cutting continued to be a significant source of CO2 emissions throughout the measurement period. It was also found that the forest floor lost carbon both before and after the cuttings.
AGRICULTURAL AND FOREST METEOROLOGY
(2023)
Article
Agronomy
Li Zhou, Yu Wang, Qingyu Jia, Guangsheng Zhou
Summary: This study investigated the associations among ecosystem productivity, phenological metrics, and climate factors in a maize cropland in Northeast China. The results showed that temperature had a significant impact on carbon uptake period and cumulative net ecosystem productivity, ultimately leading to a decrease in productivity with increasing temperature. Additionally, precipitation in summer and autumn also influenced the maximum daily net ecosystem productivity.
FIELD CROPS RESEARCH
(2021)
Article
Environmental Sciences
Li Zhi-Long, Mu Cui-Cui, Chen Xu, Wang Xing-Yu, Dong Wen-Wen, Jia Lin, Mu Mei, Irina Streletskaya, Valery Grebenets, Sergey Sokratov, Alexander Kizyakov, Wu Xiao-Dong
Summary: The study revealed the annual net ecosystem carbon exchange (NEE) in the Arctic regions from 2002 to 2017, showing that forest, shrub, grassland, wetland, and tundra have varying levels of CO2 exchange. Grassland emissions decreased, while shrub and forest assimilation increased, and wetland and tundra shifted from carbon sources to sinks. Seasonal variations in NEE temperature sensitivities(Q(10)) were observed, with higher values in winter and lower values in summer, suggesting that the Arctic terrestrial ecosystem acts as a carbon sink currently, but future warming could potentially reduce this carbon sink capacity.
ADVANCES IN CLIMATE CHANGE RESEARCH
(2021)
Article
Agronomy
Laura Bignotti, Angelo Finco, Riccardo Marzuoli, Rossella Urgnani, Angelo Riccio, Elena Chianese, Bart Muys, Giacomo Alessandro Gerosa
Summary: Eddy covariance measurements were conducted to assess the seasonal evolution of size-segregated aerosol fluxes above an oak-hornbeam forest in the Po Plain. The results showed that forest phenology and leaf presence/absence influenced the aerosol fluxes, with different size aerosols exhibiting different deposition and emission characteristics. Meteorological parameters and stomatal activity also played a role in aerosol flux.
AGRICULTURAL AND FOREST METEOROLOGY
(2022)
Article
Environmental Sciences
Yayi Niu, Yuqiang Li, Mingming Wang, Xuyang Wang, Yun Chen, Yulong Duan
Summary: Sandy cropland ecosystems in the semi-arid region of Horqin Sandy Land are crucial for the regional carbon balance. Continuous CO2 flux observation from 2014 to 2018 revealed that the sandy cropland acted as a carbon sink, but became a net carbon source after accounting for carbon exports and imports. The carbon fluxes were greatly influenced by environmental factors at different temporal scales, with water availability playing a dominant role in explaining inter-annual variability of gross primary productivity and ecosystem respiration.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Agronomy
Higo J. Dalmagro, Michael J. Lathuilliere, Paulo H. Z. de Arruda, Anisio A. Da Silva Junior, Fernando da S. Sallo, Eduardo G. Couto, Mark S. Johnson
Summary: This study measured the carbon exchange in agricultural fields in the Cerrado region of Brazil and found that the fields were carbon sinks, with maize intercropped with Brachiaria having the most positive carbon balance. The irrigated field was a more important carbon sink than the rainfed field, and irrigation helped reduce carbon losses resulting from drought and allowed for a third harvest in the same year.
AGRICULTURAL AND FOREST METEOROLOGY
(2022)
Article
Environmental Sciences
Kai Wang, Jingxia Wang, Zhichen Qu, Wen Xu, Hongyan Zhang, Jianlin Shen, Peng Kang, Xiaojie Zhen, Yin Wang, Xunhua Zheng, Xuejun Liu
Summary: This study used the EC technique based on a QCL spectrometer to measure NH3 fluxes in a typical cropland in the North China Plain. Enhanced emissions were observed after fertilizer application and persistent dry depositions after ploughing practice. The deposition fluxes measured by the EC technique were significantly lower than the results obtained by the inferential model method, suggesting the need for further validation.
ATMOSPHERIC ENVIRONMENT
(2022)
Article
Geosciences, Multidisciplinary
Yongzhi Bao, Tingxi Liu, Limin Duan, Xin Tong, Yongqiang Zhang, Guoqiang Wang, V. P. Singh
Summary: This study measured and analyzed the CO2 and CH4 fluxes of a meadow-rice mixed ecosystem in a semi-arid region of North China using the eddy covariance technique. The results showed significant diurnal and seasonal variations in GPP, R-eco, and CH4, with the ecosystem acting as a CO2 sink and CH4 source.
Article
Agronomy
Kelley Drechsler, Allan Fulton, Isaya Kisekka
Summary: This study conducted in California determined crop water use and crop coefficients for young almond orchards. The results showed that water use and coefficients increased until the 4th year, highlighting the importance of considering tree development and orchard age in irrigation scheduling.
IRRIGATION SCIENCE
(2022)
Article
Biodiversity Conservation
Tsegaye Gemechu Legesse, Gang Dong, Shicheng Jiang, Jingyan Chen, Xiaobing Dong, Nano Alemu Daba, Eba Muluneh Sorecha, Luping Qu, Li Tian, Changliang Shao
Summary: Different sizes of precipitation have varying effects on carbon flux in grassland ecosystems, impacting ecosystem respiration and net ecosystem CO2 exchange differently depending on the size of precipitation events.
ECOLOGICAL INDICATORS
(2021)
Article
Environmental Sciences
Ningyu Quan, Sung-Ching Lee, Chitra Chopra, Zoran Nesic, Paula Porto, Patrick Pow, Rachhpal S. Jassal, Sean Smukler, Maja Krzic, Sara H. Knox, T. Andrew Black
Summary: This study used the eddy-covariance technique to continuously measure the emissions of three main biogenic greenhouse gases (CO2, N2O, and CH4) from potato and pea crops in southwest British Columbia, Canada. After flux footprint corrections, the potato and pea crops were found to be weak CO2 sinks. However, when taking carbon (C) export and import into account, the potato crop became a moderate C source, while the pea crop became near C neutral.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Zhang Wen, Li Yuhong, Zhao Fenghua, Zhou Zheng, Han Wei, Zhou Junlin, Zhang Qiao
ACTA GEOLOGICA SINICA-ENGLISH EDITION
(2020)
Article
Geography, Physical
Kangying Zhu, Zhigang Sun, Fenghua Zhao, Ting Yang, Zhenrong Tian, Jianbin Lai, Buju Long, Shiji Li
ISPRS JOURNAL OF PHOTOGRAMMETRY AND REMOTE SENSING
(2020)
Article
Energy & Fuels
Minglian Shen, Shifeng Dai, Ian T. Graham, Victor P. Nechaev, David French, Fenghua Zhao, Longyi Shao, Shande Liu, Jianping Zuo, Jingtao Zhao, Kun Chen, Xuanhao Xie
Summary: This study analyzes the mineralogical and geochemical compositions of volcanic ashes from the Late Permian coal-bearing strata in southwest China, revealing their distinct classification into tonsteins and K-bentonites based on the relative abundances of kaolinite and mixed-layer illite/smectite (I/S). The volcanic ashes are associated with felsic volcanic eruptions and likely originated from at least two felsic sources, indicating a complex geological history in the region.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2021)
Review
Engineering, Environmental
Liang Wang, Qingying Zhang, Xiaoyong Liao, Xiaohua Li, Shunan Zheng, Fenghua Zhao
Summary: Heavy metal pollution of farmland is a global issue, and using low HM accumulating cultivars can mitigate the risk of crop contamination, by limiting Cd translocation in different plant parts.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Geosciences, Multidisciplinary
Shifeng Dai, Robert B. Finkelman, David French, James C. Hower, Ian T. Graham, Fenghua Zhao
Summary: Coal is a complex geological material containing various elements and minerals, with the modes of occurrence of elements playing a crucial role in coal mining, preparation, combustion, utilization, as well as environmental and health effects. Understanding the modes of occurrence is essential for extracting critical metals from coal or coal ash, and different coals may exhibit varying element occurrences based on geological conditions.
EARTH-SCIENCE REVIEWS
(2021)
Article
Energy & Fuels
Ying Hu, Haiwei Jiang, Mei Hu, Yunyan Liu, Fenghua Zhao, Weiran Yang
Summary: By catalytic hydrogenolysis, As-enriched Pteris vittata L. was converted into high-quality biofuel, effectively treating heavy metals and reducing arsenic content. The main products, C5 and C6 furans and low oxygen content ketones, have high potential as biofuel and commercial applications.
Article
Energy & Fuels
Haiwei Jiang, Rongwei Yan, Chang Cai, Xingfan Chen, Fenghua Zhao, Liangliang Fan, Chunbao Charles Xu, Weiran Yang
Summary: This study successfully reduced the nitrogen content and increased the bio-oil yield by treating cadmium-enriched Amaranthus hypochondriacus L. with hydrothermal liquefaction in ethanol-water co-solvent. The acetic acid in the acidic aqueous phase may act as a catalyst during the APR process, leading to improved bio-oil yield.
Article
Geochemistry & Geophysics
Shangqing Zhang, Xuefei Liu, Fenghua Zhao, Dongna Liu, Yu Zou, Wenxu Zhang, Xile Liu, Li Li, Lihua Zhao
Summary: Karst bauxite resources are abundant in Shanxi Province, formed in the Benxi Formation of the Carboniferous period. These resources are rich in critical metals, with iron-rich clays mainly weathered from carbonates below and the bauxite ore and top clay having allochthonous protoliths.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2021)
Article
Geosciences, Multidisciplinary
Xile Liu, Fenghua Zhao, Hongyu Guo, Zhiwei Dong, Yunsong Li, Ye Shen, Xiaokai Xu
Summary: Weathering increases humic acid content in coal, reduces aromaticity, and decreases coal crystallinity, which facilitates microbial degradation and utilization of coal.
NATURAL RESOURCES RESEARCH
(2022)
Article
Geochemistry & Geophysics
Ning Wang, Shifeng Dai, Victor P. Nechaev, David French, Ian T. Graham, Fenghua Zhao, Jianping Zuo
Summary: This paper examines the occurrence of siderite in tuffaceous mudstone from Yujingshan, eastern Yunnan, southwestern China, suggesting a hybrid origin for siderite formation involving hydrothermal alteration of volcanic materials. The findings indicate a relationship between siderite and minerals like quartz, ilmenite, and chromite, with calculated values for paleosalinity and paleotemperature.
Article
Geosciences, Multidisciplinary
Yuehua Hou, Dongna Liu, Fenghua Zhao, Linhua Zhong, N. Nnachi Emmanuel, Qi Zhang
Summary: The main purpose of this study was to investigate the geological characteristics affecting coalbed methane (CBM) enrichment in the Anze area in China and predict the optimal CBM enrichment zones. The study revealed that the adsorption capacities and coal structure varied in different regions, and the degree of fracture development and reservoir fractal dimension also had an impact. Favorable reservoir conditions were found in specific areas in the northern and southern parts.
NATURAL RESOURCES RESEARCH
(2022)
Article
Engineering, Environmental
Liang Wang, Xiaoyong Liao, Fenghua Zhao, Baolin Yang, Qingying Zhang
Summary: This study explores feasible technologies for different risk lands and develops a practical solution for safe rice production at a regional scale. The study finds that foliar fertilizers and alkaline fertilizers can effectively reduce cadmium accumulation and increase grain compliance rate. The spatial division based on conditional inference tree provides a precise and differentiated solution for regional management strategies of cadmium-polluted paddy fields.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Agronomy
Zewei Yue, Zhao Li, Guirui Yu, Zhi Chen, Peili Shi, Yunfeng Qiao, Kun Du, Chao Tian, FengHua Zhao, Peifang Leng, Zhaoxin Li, Hefa Cheng, Gang Chen, Fadong Li
Summary: Investigating the response of net ecosystem productivity (NEP) to phenological variation for crop ecosystems is important for understanding the impact of climate change on agriculture. However, the controlling mechanisms for rotation cropland ecosystems have not been well understood. This study used a 16-year flux observation to explore the potential of carbon flux phenology (CFP) and abiotic factors in interpreting the interannual variability (IAV) of NEP. The results showed that NEP was significantly controlled by different factors in wheat and maize seasons, and the carbon budgets varied depending on the season.
AGRICULTURAL AND FOREST METEOROLOGY
(2023)
Article
Environmental Sciences
Liang Wang, Baolin Yang, Qiqing Liu, Qingying Zhang, Fenghua Zhao, Yuxuan Xiao, Xiaoyong Liao
Summary: A low-cost practical technology to reduce cadmium pollution in rice has been discovered in southern China. By using alkaline Si-rich compound materials, grain cadmium content can be decreased by 75% on average, while increasing rice yield and improving soil quality. These compound materials also inhibit soil acidification, increase available phosphorus and silicon, and reduce available cadmium content. The alkaline environment created by the alkaline components effectively prevents the formation of Fe/Mn plaques on the root surface and reduces cadmium uptake. Additionally, the increase in available silicon inhibits cadmium translocation from roots to stems.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Agronomy
Zewei Yue, Zhao Li, Guirui Yu, Zhi Chen, Peili Shi, Yunfeng Qiao, Kun Du, Chao Tian, Fenghua Zhao, Peifang Leng, Zhaoxin Li, Hefa Cheng, Gang Chen, Fadong Li
Summary: This study characterized the CO2 fluxes of a winter wheat-summer maize rotation cropland in different growing periods and identified the driving factors using long-term monitoring data. Leaf area index (LAI), photosynthetically active radiation (PAR), and soil water content (SWC) were found to be important drivers of CO2 fluxes in both wheat and maize seasons. The findings provide valuable insights into the carbon cycle of cropland ecosystems under climate change.
AGRICULTURAL AND FOREST METEOROLOGY
(2023)
