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Corrigendum to “Drivers of PM_(2.5)-O_(3) co-pollution: from the perspective of reactive nitrogen conversion pathways in atmospheric nitrogen cycling” [Sci. Bull. 67(18) (2022) 1833–1836]

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Science Bulletin 2023年第3期68卷 351-351页

作者： Feng Wang Weichao Wang Zhenyu Wang Zhongcheng Zhang Yinchang Feng Armistead GRussell Guoliang Shi State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control Tianjin Key Laboratory of Urban Transport Emission ResearchCollege of Environmental Science and EngineeringNankai UniversityTianjin 300350China China Meteorological Administration-Nankai University(CMA-NKU)Cooperative Laboratory for Atmospheric Environment-Health Research College of Environmental Science and EngineeringNankai UniversityTianjin 300350China Department of Electronics and Tianjin Key Laboratory of Photo-Electronic Thin Film Device and Technology Nankai UniversityTianjin 300071China School of Civil and Environmental Engineering Georgia Institute of TechnologyAtlantaGA 30332-0512USA

The authors would like to correct Fig.1e,*** to our neglect when doing the picture layout of Fig.1,the abscissa in Fig.1e,f is error:the abscissa ranges from80 to 0 in Fig.1e and ranges from90 to20 in *** image has been corrected:the abscissa ranges from80 to 80 in Fig.1e and ranges from80 to 80 in Fig.1f[1].We declare that this correction does not change the results or conclusions of this paper.

关键词： cycling pollution correction

Mixed Plantations Enhance More Soil Organic Carbon Stocks than Monocultures across China: Implication for Optimizing Afforestation Strategies

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SSRN 2021年

作者： Xiang, Yangzhou Li, Yuan Luo, Xuqiang Liu, Ying Huang, Pei Yao, Bin Zhang, Leiyi Li, Wenli Xue, Jianming Gao, Hongjuan Li, Yonghua Zhang, Wei Guizhou Provincial Key Laboratory of Geographic State Monitoring of Watershed School of Geography and Resources Guizhou Education University Guiyang550018 China State Key Laboratory of Grassland Agro-ecosystems College of Pastoral Agriculture Science and Technology Lanzhou University Lanzhou730020 China School of Biological Sciences Guizhou Education University Guiyang550018 China Institute of Desertification Studies Chinese Academy of Forestry Beijing100091 China State Forestry Administration Dunhuang Desert Ecosystem Location Research Station Dunhuang736200 China South China Botanical Garden Chinese Academy of Sciences Guangzhou510650 China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology Sun Yat-sen University Guangzhou510006 China Saibei Forest Farm Zhangjiakou075000 China Scion 8440 New Zealand

Forest plays an essential role in mitigation of climate change through sequencing carbon dioxide in the atmosphere. Establishment of mixed plantations is a promising means for increasing soil organic carbon (SOC) compared to monocultures. However, with rapid increase of forest area, monocultures forests largely dominate the afforestation in China. To appropriately optimize afforestation strategies and maximum subsequent potential in C sequestration in China, this study conducted a meta-analysis with 427 observations across 176 study sites from China to quantify changes in SOC stocks with mixed plantations relative to monocultures, and identify predominant drivers for SOC stocks including region distribution, climatic factors, previous land use, edaphic properties, plantation age, nitrogen-fixing tree, mixing proportion, and mixed plantation type. Results showed that mixed plantations significantly increased SOC stocks by 12% in China, and the mixing proportion should not exceed 55%. Mixed plantation type was the principal driver for the changes in SOC stocks in response to mixed plantations. Additionally, compared to monocultures, mixed plantations in barren land has the greatest potential in increasing SOC stocks, and with limited water or thermal resource, additional measures instead of mixed plantations should be explored to increase SOC stocks in north, central, and northwest of China. Overall, this study improves our knowledge of the mixed-tree-driven spatiotemporal variability on SOC storage and have valuable implications for the establishment and management of afforestation. © 2021, The Authors. All rights reserved.

关键词： Reforestation

Variations of Ground Surface Albedo and its Influence on the Photolysis Rates of No2 in a Typical Urbanized Area of Shanghai

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SSRN 2024年

作者： Xiu, Guangli Duan, Yusen Fu, Qingyan Zhang, Kun Wang, Qian Xiao, Linhong Xiao, Yu Huo, Juntao Yang, Fan Meng, Chen State Environmental Protection Key Lab of Environmental Risk Assessment and Control on Chemical Processes School of Resources and Environmental Engineering East China University of Science and Technology Shanghai200237 China Shanghai Environmental Protection Key Laboratory for Environmental Standard and Risk Management of Chemical Pollutants School of Resources and Environmental Engineering East China University of Science and Technology Shanghai200237 China Shanghai Technology Center for Reduction of Pollution and Carbon Emission Shanghai200235 China Australia-China Center for Air Quality Science and Management Australia Shanghai Academy of Environmental Sciences Shanghai200233 China Shanghai University Shanghai200444 China 3Clear Technology Co. Ltd. Beijing100029 China Shanghai Environmental Monitoring Center Shanghai200235 China School of Geographic Sciences East China Normal University Shanghai200241 China Pudong New Area Environmental Monitoring Station Shanghai200135 China

Photolysis reactions are commonly regarded as the initial reaction of atmospheric chemistry. The photolysis of NO2 is a crucial reaction contributing to ozone pollution within the planetary boundary *** rate of NO2 photolysis depends on factors such as solar actinic flux, the absorption cross-section of NO2, and the quantum yield of the resulting photodissociation products. Ground surface albedo has the potential to amplify the overall J(NO2) value and enhance photochemical reactions. Research conducted at the PUDONG supersite, situated in a downtown areas surrounded by urban structures, revealed an average ground surface albedo of J(NO2) to be 0.146±0.028. This albedo was observed to increase with higher solar zenith angles, surpassing 0.20 when the solar zenith angle exceeded 45°, values notably higher than the parameter utilized in the CAMx model(0.08).The reflection of solar UV radiation by the ground surface can stimulate ozone formation by boosting the photolysis of NO2. Modeling results from F0AM during a typical ozone episode indicated that the average increments in daily maximum ozone concentration were 7.21%,14.52% and 21.91% for albedos of 0.10, 0.15 and 0.20, respectively, compared to albedo of 0.05. WRF-CAMx simulations demonstrated a significant increase in daily maximum ozone concentration with the expansion of urban ground surfaces from 1990 to 2020, highlighting the substantial impact of rising ground surface albedo on exacerbating ozone pollution. © 2024, The Authors. All rights reserved.

关键词： Ozone

Spatio-temporal Variability and Trends of Mean and Extreme Rainfall Events in the Sudano-sahelian Region of Cameroon

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Research Square

Research Square 2021年

作者： Njouenwet, Ibrahim Djiotang Tchotchou, Lucie A. Ayugi, Brian Odhiambo Guenang, Guy Merlin Vondou, Derbetini A. Nouayou, Robert Laboratory of Environmental Modeling and Atmospheric Physics Department of Physics University of Yaounde 1 P.O. Box 812 Yaoundé Cameroon University of Yaoundé 1 IRGM IRD P.O. Box 1857 Yaoundé Cameroon Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Collaborative innovation Centre of Atmospheric Environment and Equipment Technology School of Environmental Science and Engineering Nanjing University of Information Science and Technology Nanjing210044 China L2MPS Department of Physics Faculty of Science University of Dschang P.O. Box 96 Dschang Cameroon Laboratory of Environmental Modeling and Atmospheric Physics Department of Physics Faculte des Sciences University of Yaounde 1 P.O. Box 812 Yaoundé Cameroon Laboratory of Geophysics and Geoexploration Department of Physics Faculte des Sciences University of Yaounde 1 Cameroon

The Sudano-Sahelian region of Cameroon is mainly drained by the Benue, Chari and Logone rivers, which are very useful for water resources, especially for irrigation, hydropower generation, and navigation. Long-term changes in mean and extreme rainfall events in the region may be of crucial importance in understanding the impact of climate change. Daily and monthly rainfall data from twenty-five synoptic stations in the study area from 1980 to 2019 and extreme indices from the Expert Team on Climate Change Detection and Indices (ETCCDI) measurements were estimated using the non-parametric Modified Mann-Kendall test and the Sen slope estimator. The precipitation concentration index (PCI), the precipitation concentration degree (PCD), and the precipitation concentration period (PCP) were used to explore the spatio-temporal variations in the characteristics of rainfall concentrations. An increase in extreme rainfall events was observed, leading to an upward trend in mean annual. Trends in consecutive dry days (CDD) are significantly increasing in most parts of the study area. This could mean that the prevalence of drought risk is higher in the study area. Overall, the increase in annual rainfall could benefit the hydro-power sector, agricultural irrigation, the availability of potable water sources, and food security. © 2021, CC BY.

关键词： Irrigation

Back Cover: Outer Surface Interactions of Cucurbituril That Trigger the Assembly of Supramolecular Three-Dimensional Polycatenanes (Chem. Eur. J. 12/2017)

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Chemistry – A European Journal 2017年第12期23卷 2969-2969页

作者： Xiaowei Cui Wenxuan Zhao Dr. Kai Chen Prof. Dr. Xin-Long Ni Prof. Yuan-Qian Zhang Prof. Dr. Zhu Tao Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province Guizhou University Guiyang 550025 China Department Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control School of Environmental Science and Engineering Nanjing University of Information Science & Technology Nanjing 210044 China

Evaluation and Uncertainty Analysis of Himawari-8 Hourly Aerosol Product Version 3.1 and its Influence on Surface Solar Radiation Before and During the COVID-19 Outbreak

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SSRN 2023年

作者： Tang, Chenqian Shia, Chong Husi, Letu Ma, Run Yoshida, Mayumi Kikuchi, Maki Xu, Jian Li, Nan Zhao, Mengjie Chen, Liangfu Shi, Guangyu State Key Laboratory of Remote Sensing Science Aerospace Information Research Institute Chinese Academy of Sciences Beijing100101 China Nanjing University of Information Science & Technology Nanjing210044 China Remote Sensing Technology Center of Japan Tsukuba305-8505 Japan Japan Aerospace Exploration Agency Tsukuba305-8505 Japan National Space Science Center Chinese Academy of Sciences Beijing100190 China Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology School of Environmental Science and Engineering Nanjing University of Information Science & Technology Nanjing210044 China Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing100101 China State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences Beijing100029 China University of Chinese Academy of Sciences Beijing100049 China

The hourly Himawari-8 version 3.1 (V31) aerosol product has been released and incorporates an updated Level 2 algorithm that uses forecast data as an a priori estimate. However, there has not been a thorough evaluation of V31 data across a full-disk scan, and V31 has yet to be applied in the analysis of its influence on surface solar radiation (SSR). This study firstly investigates the accuracy of V31 aerosol products, which includes three categories of aerosol optical depth (AOD) (AODMean, AODPure, and AODMerged) as well as the corresponding Ångström exponent (AE), using ground-based measurements from the AERONET and SKYNET. Results indicate that V31 AOD products are more consistent with ground-based measurements compared to previous products (V30). The highest correlation and lowest error were seen in the AODMerged, with a correlation coefficient of 0.8335 and minimal root mean square error of 0.1919. In contrast, the AEMerged shows a larger discrepancy with measurements unlike the AEMean and AEPure. Error analysis reveals that V31 AODMerged has generally stable accuracy across various ground types and geometrical observation angles, however, there are higher uncertainties in areas with high aerosol loading, particularly for fine aerosols. The temporal analysis shows that V31 AODMerged performs better compared to V30, particularly in the afternoon. Finally, the impacts of aerosols on SSR based on the V31 AODMerged are investigated through the development of a sophisticated SSR estimation algorithm in the clear sky. Results demonstrate that the estimated SSR is significant consistency with those of well-known CERES products, with preservation of 20 times higher spatial resolution. The spatial analysis reveals a significant reduction of AOD in the North China Plain before and during the COVID-19 outbreak, resulting in an average 24.57 W m–2 variation of the surface shortwave radiative forcing in clear sky daytime. © 2023, The Authors. All rights reserved.

关键词： COVID-19

Construction of Fish Scale (Cyprinus Carpio L.) Gelatin-Fatty Acid Conjugate for Loading Curcumin: Effect of Alkyl Chain Length on the Interaction and Stability

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SSRN 2024年

作者： Li, Haoxin Liu, Jia Wang, Yanxi Wan, Aida Wan Mustapha Zeng, Fankui The Key Laboratory of Environmental Pollution Monitoring and Disease Control Ministry of Education Guizhou Provincial Engineering Research Center of Ecological Food Innovation School of Public Health Guizhou Medical University Guiyang550025 China Colloage of Food Science & Technology Shanghai Ocean University Shanghai201306 China Guizhou Academy of Agricultural Sciences Guiyang550006 China Bangi43600 Malaysia School of Liquor & Food Engineering Guizhou University Guiyang550025 China Research & Development Center for Eco-Material and Eco-Chemistry Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou730000 China

Fish scale gelatin-fatty acid conjugates (GFCs) with different alkyl chain lengths were constructed to increase the aqueous solubility of curcumin. The surface hydrophobicity (from 4987 ± 223.79 to 9982 ± 262.78) and curcumin loading capacity (from 8.20 ± 0.54 to 31.18± 1.41 µg/mg) of the GFCs exhibited significant enhancements with the extension of alkyl chain lengths. This was accompanied by a reduction in particle size (from 661.5 ± 28.9 to 329.7 ± 6.6 nm) and ζ-potential (from - 2.7 ± 0.92 to -26.8 ± 0.27). The fluorescence spectroscopy and isothermal titration calorimetry confirmed that gelatin-oleic acid conjugate shared an optimal binding constant (Ka, 2.40 × 108 L·mol−1 and 3.47×105 M-1) and binding site (n, 1.45 and 2.276) with curcumin among GFCs. Increasing GFC's alkyl chain length also boosted the stability of entrapped curcumin against the thermal environment and ultraviolet radiation. These results could be beneficial for gelatin-based nanocarrier development and application. © 2024, The Authors. All rights reserved.

关键词： Chain length

Anaerobic Granular Sludge Performance in an Expanded Granular Sludge Bed Reactor Treating Calcium-Rich Wastewater by Adjusting Caco3 Crystallization: Effect of Upflow Velocity and Ca2+ Concentration

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SSRN 2023年

作者： Liu, Xiaoji Pan, Dongning Yuan, Quan Feng, Xiyuan Li, Meixuan Song, Xuening Li, Meiling Ge, Yajuan Xing, Yukun Yu, Yuanzhou Jin, Zhengyu Key Laboratory of Ecology and Environment in Minority Areas National Ethnic Affairs Commission College of Life & Environmental Sciences Minzu University of China Beijing100081 China School of Ecology and Environment Beijing Technology and Business University Beijing100048 China CECEP（Feixi）WTE CO. Ltd Hefei231241 China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China Harbin Institute of Technology Software Engineering Co. Ltd Harbin150028 China Tianjin Research Institute for Water Transport Engineering M.O.T Tianjin300000 China Huanan Construction Limited Company China Construction Sixth Engineering Bureau Shenzhen518108 China

The role of upflow velocity and Ca2+ concentration in controlling the type and rate of CaCO3 crystallization and their impacts on an expanded granular sludge bed (EGSB) reactor were studied. An improved upflow velocity could promote metastable CaCO3 crystals and achieve the optimized portion of vaterite with a value of 84% at 10 m/h with a small amount of aragonite, thus limiting the scaling in the reactor. The calcium concentration was found similar impacts on CaCO3 crystalline phases. Through stepwise setup of increasing upflow velocity and organic loading rate (OLR), granules cultivated in R3 (Ca2+ 800 mg/L) revealed maximum amount of biomass with biggest particle size distribution and fastest average settling rate, with relative stable COD removal efficiency and the fast optimized reactor capacity at OLR of 16 kgCOD/m3d. A low upflow velocity and a higher Ca2+ concentration could be applied at the initial cultivation stage of the EGSB reactor to promote nucleus formation and granules growth. The Ca2+ concentration had a significant impact on the bacterial community and favoured the growth of Tolumonas and Anaeromousa Anaeroarcus. Archaea, rather than bacteria, was strengthened to contribute more to methane production at a relatively high Ca2+ concentration. © 2023, The Authors. All rights reserved.

关键词： Anaerobic digestion

Summer Monsoon Rainfall Variations and its Association with Atmospheric Circulations over Sudan

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SSRN 2021年

作者： Alriah, Mohamed Abdallah Ahmed Bi, Shuoben Shahid, Shamsuddin Nkunzimana, Athanase Ayugi, Brian Ali, Md. Arfan Bilal, Muhammad Teshome, Asaminew Sarfo, Isaac Elameen, Ayman M. School of Geographical Sciences Nanjing University of Information Science and Technology Nanjing210044 China Sudan Meteorological Authority P.O.Box 574 Khartoum Sudan Johor Skudai81310 Malaysia Department of Geography University of Burundi P.O. Box 5142 Bujumbura Burundi Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Collaborative Innovation Center of Atmospheric Environment and Equipment Technology School of Environmental Science and Engineering Nanjing University of Information Science and Technology Nanjing210044 China Nanjing210044 China National Meteorological Agency of Ethiopia P.O. Box 1090 Addis Ababa Ethiopia Research Institute for History of Science & Technology Nanjing University of Information Science & Technology Nanjing210044 China School of Remote sensing and Geomatics Engineering Nanjing University of Information Science and Technology Nanjing210044 China

This work was aimed to investigate the factors influencing summer (June-September: JJAS) monsoon rainfall variability over Sudan using monthly ground and Climate Hazard Group Infrared Precipitation with Station data (CHIRPS) from 1980 to 2018. The Mann-Kendall (MK) and sequential MK tests were used for trend analysis, whereas the variations of rainfall patterns were analyzed using Empirical Orthogonal Function. The atmospheric factors affecting JJAS rainfall were investigated, and atmospheric circulation anomalies (CA) related to the wet and dry conditions were assessed. The JJAS rainfall revealed a significant increasing trend during the study period. The wet condition was found with accompanying convergence winds at low levels and divergence in the upper levels, while the dry conditions were due to the weakening of convergence moisture transport. A hot Sea Surface Temperature anomaly over the Eastern Pacific Ocean (Nino3.4) are associated with dry conditions and cold anomalies are associated with wet conditions. There is a negative relation between JJAS rainfall over Sudan and Out-going Longwave Radiation in the central Indian Ocean, equatorial Atlantic Ocean, and eastern. This research extends our knowledge of atmospheric circulations influencing the summer rainfall variability over Sudan, providing a reasonable basis for monitoring and predicting similar conditions in the future. © 2021, The Authors. All rights reserved.

关键词： Rain