Article
Environmental Sciences
Siyuan Cai, Xu Zhao, Xuejun Liu, Xiaoyuan Yan
Summary: Paddy fields in China contribute significantly to global cropland ammonia emissions and rice consumption, highlighting the need for a balance between emissions reduction and food demand. A study in the Middle and Lower Yangtze River Basin found that lower nitrogen fertilizer rates help reduce NH3 emissions without significant yield loss. An estimated nitrogen surplus criterion of 15.6 kg N ha(-1) was identified for NH3 emissions reduction without impacting rice yield. Agricultural practices such as deep placement and proper N splitting frequency were identified as effective measures to reduce NH3 emissions.
ENVIRONMENTAL POLLUTION
(2023)
Article
Agronomy
Man Zhang, Kaixuan Feng, Xinde Dong, Yongjin Zhou, Jinhua Chen, Bin Teng, Zhong Li, Lantian Ren, Wenge Wu
Summary: This study analyzes the impact of high-temperature stress on rice yields by analyzing meteorological data from Anhui Province. It identifies five indica rice varieties with strong high-temperature tolerance suitable for planting in the middle and lower reaches of the Yangtze River.
Article
Environmental Sciences
Qing Zhu, Yang Yu, Haixing Gong, Yanyu Wang, Hongli Wang, Weijie Wang, Bo Xu, Tiantao Cheng
Summary: Since 2013, the implementation of pollution prevention and control action in China has reduced particulate pollution but increased ozone pollution, especially in the economically developed eastern region. Based on long-term observation data, the spatio-temporal characteristics of urban PM2.5 and O-3 pollution in the Yangtze River Delta were analyzed, and the effects of meteorological and non-meteorological factors on pollution were quantified. The results provide insights into particulate and ozone pollution in the region and can assist policymakers in formulating accurate air pollution prevention and control strategies at urban and city cluster scales in the future.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Thermodynamics
Changhua Chen, Yuqing Luo, Hong Zou, Junbing Huang
Summary: Technological progress is an effective tool for reducing carbon emissions, but its connection to carbon emissions is not well-researched in the literature. To address this gap, this study develops a new theoretical model based on the Green Solow model and analyzes the driving factors of carbon emissions in the Yangtze River Delta region using dynamic panel models. The results indicate that overall technological progress is beneficial for reducing carbon emissions. Energy substitution and energy conservation technologies have a positive effect on carbon emissions reduction, while production technology has a significant impact on driving carbon emissions.
Article
Environmental Sciences
Yu-Hao Mao, Shukun Yu, Yongjie Shang, Hong Liao, Nan Li
Summary: Surface ozone concentrations in the Yangtze River Delta (YRD) region in China have shown an increase due to human emissions of nitrogen oxide (NOx) and volatile organic compounds (VOCs). Reducing VOCs emissions is found to be the most effective method for controlling ozone in the region. The study suggests that with the continued reduction of VOCs (NOx) emissions in the YRD, the growth of ozone will be stopped from May to September but may continue in October.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Environmental Sciences
Youru Yao, Wei Wang, Kang Ma, Huarong Tan, Yong Zhang, Fengman Fang, Cheng He
Summary: In this study, the spatiotemporal regularity of the airflow transport trajectory of ozone in the Yangtze River Delta (YRD) region was revealed by combining the ozone observational record with a HYSPLIT model. High ozone concentrations were mainly found in industrial cities and resource-based cities. The center of ozone pollution shifted westward of Nanjing from 2015 to 2021. The study also identified the regional transport path of ozone in the YRD region and provided a scientific reference for the joint prevention and control of ozone pollution in this area.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Da Gao, Min Xie, Jane Liu, Tijian Wang, Chaoqun Ma, Haokun Bai, Xing Chen, Mengmeng Li, Bingliang Zhuang, Shu Li
Summary: The study analyzed the characteristics of O-3 variations in the Yangtze River Delta during the warm seasons from 2014 to 2018, and identified meteorological controlling factors influencing O-3 concentrations. Five dominant synoptic weather patterns were identified, each favoring an increase in O-3 concentrations through different meteorological mechanisms. The intensity of these synoptic weather patterns was found to have a significant impact on O-3 inter-annual variation.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Article
Environmental Sciences
Yang Qin, Jingyi Li, Kangjia Gong, Zhijun Wu, Mindong Chen, Momei Qin, Lin Huang, Jianlin Hu
Summary: The study revealed a decreasing trend in the frequency of double high pollution (DHP) in the Yangtze River Delta region from 2015 to 2019, with DHP mainly occurring in spring and autumn, higher levels of MDA8 O-3 during DHP compared to high O-3 pollution (HOP), and higher PM2.5 levels during high PM2.5 pollution (HPP). DHP events were associated with weak pressure fields and moderate temperature and humidity conditions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Tian Feng, Lang Liu, Shuyu Zhao
Summary: The strict emission control measures in the Yangtze River Delta region have significantly impacted air pollution. However, the effects of reducing PM2.5 and NOx on summer O3 formation are still controversial. Simulation results show that NOx mitigation has changed daytime O3 formation, but the decrease in O3 due to NOx is counteracted by haze alleviation. It is important to take more efforts to achieve lower O3 levels.
ENVIRONMENTAL POLLUTION
(2023)
Article
Meteorology & Atmospheric Sciences
Wenjing Huang, Timothy J. Griffis, Cheng Hu, Wei Xiao, Xuhui Lee
Summary: Developed regions are major sources of atmospheric methane, with the Yangtze River Delta in China being densely populated and having significant anthropogenic and natural methane sources. Agricultural soils, particularly rice production, drove seasonal variability in methane emissions in 2018, while natural emissions accounted for around 10%-10.1% of total emissions in the region. AGS was the dominant factor for seasonal variations in atmospheric methane concentration, contributing significantly more than natural sources, especially in summer.
ADVANCES IN ATMOSPHERIC SCIENCES
(2021)
Article
Environmental Sciences
Jingxin Xu, Sheng Wang, Borui Mai, Youfei Zheng, Shuang Qiu, Wenxin Tian, Hanqing Kang, Xi Zhang, Jinhui Gao
Summary: Regional simulation of ozone dry deposition is important for understanding ozone pollution threats and quantifying its impact on terrestrial ecosystems. This study evaluates ozone dry deposition in the Yangtze River Delta using two different schemes and compares the results with observations. The simulated ozone concentrations were lower than measurements, and the Surfatm scheme showed better agreement with observations. The mean ozone concentrations and dry deposition velocities in the region ranged from 30 to 50 nL L-1 and from 0.2 to 0.5 cm s-1 during daytime, respectively. Improving the simulation results requires considering land use types, parameter revisions, meteorological factors, and chemical reactions.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Environmental Sciences
Xinqi Wang, Yan Xiang, Wentao Liu, Lihui Lv, Yunsheng Dong, Guangqiang Fan, Jinping Ou, Tianshu Zhang
Summary: During the 2016 G20 summit in Hangzhou, stringent emission reduction measures were implemented, leading to a decrease in PM2.5 concentration and an increase in ozone concentration. Ozone pollution was mainly influenced by northeast winds, with vertical and horizontal transport occurring at heights of 1-2 km.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Environmental Sciences
Changgao Cheng, Zhou Fang, Qin Zhou, Xiang Yan, Chunlin Qian, Nan Li
Summary: This study presents a new method for calculating urban socioeconomic development indexes and evaluates the effects of regional industrial growth, consumer markets, and spatial expansion on urban carbon emissions. The research identifies key factors driving carbon emissions in different city categories and proposes strategies for reducing carbon emissions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Meteorology & Atmospheric Sciences
Chenchao Zhan, Min Xie, Jane Liu, Tijian Wang, Meng Xu, Bing Chen, Shu Li, Bingliang Zhuang, Mengmeng Li
Summary: Ozone (O-3) pollution in the Yangtze River Delta mainly occurs in the warm seasons, with most cities failing to meet national standards and an increase in surface O-3 concentration in recent years. The spatial distribution of O-3 shows a significant positive autocorrelation, with key factors including downward UV radiation, temperature, and wind speed. Premature mortality due to O-3 is estimated to be 5,889 cases per year, with a greater sensitivity to O-3 concentration than population size, highlighting the importance of controlling peak O-3 concentrations for health benefits.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2021)
Article
Agronomy
Yulin Yan, Youngryel Ryu, Bolun Li, Benjamin Dechant, Sheir Afgen Zaheer, Minseok Kang
Summary: Sustainable rice farming practices are urgently needed to meet increasing food demand, cope with water scarcity, and mitigate climate change. Traditional farming methods that prioritize a single objective have proven to be insufficient, while simultaneously optimizing multiple competing objectives remains less explored. This study optimized farm management to increase rice yield, reduce irrigation water consumption, and tackle the dilemma of reducing GHG emissions. The results suggest that the optimized management can maintain or even increase crop yield, while reducing water demand and GHG emissions by more than 50%.
AGRICULTURAL AND FOREST METEOROLOGY
(2024)
Article
Geography, Physical
Mingyue Zhao, Jian Peng, Hua Zheng, Gretchen C. Daily, Yuanxin Liu, Jiansheng Wu, Yanglin Wang
Summary: This study improved a conceptual framework by using Guangdong Province, China as a case study area, and employed spatial analysis to assess the ecosystem service in protecting coastal areas from tropical cyclone hazards. The results showed that while the TCHMS flow and benefit were sufficient in inland areas, they were severely deficient in coastal megacities in Guangdong Province.
PROGRESS IN PHYSICAL GEOGRAPHY-EARTH AND ENVIRONMENT
(2022)
Article
Computer Science, Interdisciplinary Applications
Jinfeng Ma, Jing Zhang, Ruonan Li, Hua Zheng, Weifeng Li
Summary: The study developed a framework integrating BO and high-performance computing, with model evaluations on a Hadoop cluster to automate model calibration. The case study showed that the framework can reduce execution times effectively while maintaining accuracy, and provides evaluation of different surrogate models and acquisition functions with real-time visualization.
ENVIRONMENTAL MODELLING & SOFTWARE
(2022)
Article
Environmental Sciences
Binbin Huang, Yanzheng Yang, Ruonan Li, Hua Zheng, Xiaoke Wang, Xuming Wang, Yan Zhang
Summary: This study analysed the impact of land use/land cover change on water retention in Beijing between 2000 and 2015. The results showed an overall increase in water retention, with forests contributing the most to the increase. However, urbanization, cropland expansion, and deforestation led to a decline in water retention.
Article
Biodiversity Conservation
Yuebo Su, Bowen Cui, Zhiyun Ouyang, Xiaoke Wang
Summary: This study investigated the differences and changes in soil nutrients across three land-use types (neighborhoods, parks, and roadsides) on the urban-rural gradients in Beijing. The results showed that land use plays a significant role in modifying soil nutrient gradients.
Article
Computer Science, Interdisciplinary Applications
Jinfeng Ma, Kaifeng Rao, Ruonan Li, Yanzheng Yang, Weifeng Li, Hua Zheng
Summary: The paper introduces an improved Hadoop-based cloud framework that parallelizes conventional sequential-model-based optimization techniques to alleviate computational burden and enhance efficiency. The framework can automatically rebalance workload and is adaptable to other complex model applications.
ENVIRONMENTAL MODELLING & SOFTWARE
(2022)
Article
Environmental Sciences
Yanan Guo, Ruonan Li, Yanzheng Yang, Jinfeng Ma, Hua Zheng
Summary: Spatial targeting plays a key role in improving the efficiency of payment for ecosystem services (PES). This study identified the spatial heterogeneity of grassland degradation risk and incorporated it into PES spatial targeting using cost-benefit analysis. The results showed that considering grassland degradation risk in the spatial targeting of PES significantly increased efficiency.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Zhi Wen, Zuyang Jiang, Hua Zheng, Zhiyun Ouyang
Summary: Aboveground carbon storage in forests is influenced by both structural and compositional diversity of plant communities. This study analyzed data from tropical forest plots in Hainan Island, China, and found that structural diversity had a greater impact on aboveground carbon in the overstory stratum compared to compositional diversity. The relationship between diversity and carbon was slightly affected by soil nutrients but strongly influenced by altitude. Altitude indirectly affected overstory tree height and diameter diversity through species diversity, ultimately impacting aboveground carbon storage.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Forestry
Yuanyuan Chen, Xiaoke Wang, Hongxing Zhang, Xu Sun
Summary: Despite the importance of landscape design and water-resources management for urban planning, there is limited data on the transpiration behavior of urban trees. This study measured the sap flux density of three urban tree species in Beijing Teaching Botanical Garden and analyzed the effects of environmental factors in different timescales. The findings can provide theoretical support for predicting water consumption in plant transpiration under future climate change.
Article
Environmental Sciences
Fan Wu, Yufen Ren, Xiaoke Wang
Summary: Using multi-source data and the random forest algorithm, this study successfully extracted and mapped plantation forest in Yanqing, north China, achieving promising results.
Article
Environmental Sciences
Lijuan Li, Yanzheng Yang, Tengyu Cui, Ruonan Li, Hua Zheng
Summary: The hydrologic-related ecosystem services in upstream ecological conservation zones play an important role in regulating water scarcity and conflicts downstream. However, the combined effects of socioeconomic, land use, and climate factors on these services have not been well analyzed, leading to a lack of understanding about their spatial heterogeneity and drivers. In this study, the InVEST model and multivariate analysis were used to assess the interactions of these factors on hydrologic-related ecosystem services in the Beijing Ecological Conservation Development Zone. The results show significant temporal and spatial heterogeneity in water yield and purification services, with land use having the largest impact followed by climate and socioeconomic factors.
Article
Environmental Sciences
Dongsheng Li, Jinfeng Ma, Kaifeng Rao, Xiaoyan Wang, Ruonan Li, Yanzheng Yang, Hua Zheng
Summary: This study proposed a hybrid model (DSP) that combines the advantages of discrete wavelet transform (DWT), support vector regression (SVR), and Prophet to forecast rainfall data. The DSP model provides excellent prediction, with RMSE, MAE, and R-2 values of 6.17, 3.3, and 0.75, respectively. It yields higher prediction accuracy than the three baseline models considered and demonstrates good results when applied to rainfall data from various climate types.
Article
Agronomy
Huilin Yan, Xueli Zhou, Kaifu Zheng, Songsong Gu, Hao Yu, Kun Ma, Yangan Zhao, Yingcheng Wang, Hua Zheng, Hanjiang Liu, Dejun Shi, Guangxin Lu, Ye Deng
Summary: The application of organic fertilizer has been found to change the microbial community and increase forage biomass in monoculture, but its effects on grass-legume mixtures remain unclear.
Article
Biodiversity Conservation
Shilin Xie, Quan Pan, Hua Zheng, Nengwen Xiao, Junsheng Li
Summary: This study aimed to explore the relationship between residents and nature and its impact on psychological well-being. The results showed that bird watching activity was a key factor influencing residents' psychological well-being. Residents' preference for different aspects of biodiversity and their perception also played important roles. Personal attributes such as age, financial income, and health status also contributed to psychological well-being.
Article
Environmental Studies
Jinfeng Ma, Ruonan Li, Yanzheng Yang, Yue Hai, Tian Han, Hua Zheng
Summary: This study analysed the temporal and spatial changes in wind erosion prevention services in northern China from 2000 to 2015 and proposed suggestions for land-use management and project zoning policies.