Article
Environmental Sciences
Song Li, Chenghu Zhou, Mingxin Qu
Summary: PM2.5 has been a hot topic of concern in recent years, with most studies focusing on metropolises or areas with poor air quality. This study took Guiyang as a case study to assess the spatiotemporal variations and mechanism of PM2.5 pollution in an urban area from 2000 to 2020. The study found that PM2.5 concentration showed different temporal variations at different scales, and human activities significantly influenced the spatiotemporal variations of PM2.5.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Rui Yu
Summary: This study explores the impact of urban building form on PM2.5 pollution in Wuhan, a Chinese megacity. Various building form indices were calculated based on urban building data to present the spatial distribution of buildings. City-scale PM2.5 distribution was obtained using satellite remote sensing and ground air pollution monitoring data. The results show that the dense north-south buildings in Wuhan can slow the spread of near-surface particulate pollution, indicating the significant building blocking effect on PM2.5 diffusion. The findings of this study have implications for urban planning, architectural design, and air pollution control strategies.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Engineering, Aerospace
B. Spandana, S. Srinivasa Rao, Adithi R. Upadhya, Padmavati Kulkarni, V. Sreekanth
Summary: This study analyzed the PM2.5/PM10 ratio in different urban areas of India over a five-year period, finding the highest ratio in winter and post-monsoon seasons, especially in the Indo-Gangetic Plain region. The limited meteorological data used was unable to fully explain the variability in the ratio, and estimated values were consistently higher than measured values.
ADVANCES IN SPACE RESEARCH
(2021)
Article
Environmental Sciences
A. Patrick Behrer, David Lobell
Summary: No-till approaches in agriculture have been found to improve soil erosion, water pollution, and carbon sequestration. This study shows that there is a strong association between the adoption of no-till methods and reduced PM2.5 pollution on croplands in the American Corn Belt. The reduction in pollution leads to substantial monetary benefits from reduced mortality rates, which are comparable to the current costs of subsidizing no-till practices.
ENVIRONMENTAL RESEARCH LETTERS
(2022)
Article
Engineering, Environmental
Danlu Zhang, Wenhao Wang, Yuzhi Xi, Jianzhao Bi, Yun Hang, Qingyang Zhu, Qiang Pu, Howard Chang, Yang Liu
Summary: As wildland fires become more frequent and intense, the impact of fire smoke on air quality has worsened significantly, especially on the West Coast and in the Southeastern U.S. Over the past decade, fire smoke contributed over 25% of daily PM2.5 concentrations at most monitoring sites in the U.S., with residents further away from monitoring sites experiencing a higher smoke impact. Furthermore, excluding the contribution of fire smoke would result in a higher compliance rate with the national ambient air quality standard.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Lili Xu, Binjie Chen, Chenhao Huang, Mengmeng Zhou, Shucheng You, Fangming Jiang, Weirong Chen, Jinsong Deng
Summary: Integrated development of urban agglomeration is the main pattern of China's new modernization, but atmospheric pollution poses a significant challenge to coordinated regional development. This study used deep learning technology to analyze PM2.5 concentrations in the Yangtze River Delta region and estimated premature mortality caused by long-term exposure to PM2.5. The results showed that although PM2.5 concentrations decreased by 16.13% from 2015 to 2019, the region still experienced 239,000 premature mortalities in 2019, with differences among cities of different economic levels and sizes. This highlights the ongoing challenge of achieving equitable air pollution control in the context of integrated development of urban agglomeration.
Article
Environmental Sciences
Hamed Karimian, Yaqian Li, Youliang Chen, Zhaoru Wang
Summary: This paper analyzed the impact of AOD derived from Himawari-8 in PM2.5 predictions and proposed a novel hybrid model. The results showed that AOD missing rate is the highest in Nanjing, Hefei, and Maanshan, and the lowest in winter and summer. Considering AOD as an auxiliary variable in the model did not improve the accuracy of PM2.5 predictions and sometimes even slightly decreased it. Compared with other models, the proposed hybrid model demonstrated higher prediction accuracy.
ENVIRONMENTAL RESEARCH
(2023)
Review
Environmental Sciences
Li Lin, Liping Di, Chen Zhang, Liying Guo, Yahui Di
Summary: Urban poverty and gentrification are significant challenges faced by cities globally. Poverty is a main contributor to poor health and social conflict, while gentrification, while reducing poverty rates, has negative impacts on original residents.
Article
Ecology
Natalia Bakaeva, Minh Tuan Le
Summary: Air pollution is currently the most dangerous form of environmental degradation in Russia. The degree of pollution is influenced by urbanization, anthropogenic activities, and climatic conditions. Fine dust particles pose the greatest health risks.
ECOLOGICAL INFORMATICS
(2022)
Article
Biotechnology & Applied Microbiology
Jingyi Zhang, Tong Zhao, Xiangyang Zhai
Summary: The article introduces the application of satellite remote sensing technology in monitoring and analyzing atmospheric pollutants, as well as the detection of spatial distribution and concentration changes of small-scale pollutants in the air through inversion algorithms.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Environmental Sciences
Chunhui Zhao, Chengxin Zhang, Jinan Lin, Shuntian Wang, Hanyang Liu, Hongyu Wu, Cheng Liu
Summary: This study analyzed the temporal variations of NO2 concentrations during the COVID-19 lockdown and post-epidemic era in 11 Chinese megacities. The study found that NO2 concentrations significantly decreased during the most rigorous lockdown period, and the differences between satellite and in situ measurements can be explained by vertical discrepancies of atmospheric NO2. In the post-epidemic era, both satellite and in situ measurements showed a decrease in NO2 concentrations, possibly related to the reduction of the transportation industry.
Article
Environmental Sciences
Li Huang, Xiaoying Han, Xuelei Wang, Yaodong Zhang, Jinfeng Yang, Aiping Feng, Jiaguo Li, Nanhuanuowa Zhu
Summary: A spatial continuous evaluation method coupled with high-resolution remote sensing data has been established and applied to estimate urban NPS nitrogen and phosphorus loads in Tongzhou, China. The method allows for quick spatial visualization assessment of urban NPS pollution and is applicable for entire cities or urban agglomerations.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Guannan Geng, Qingyang Xiao, Shigan Liu, Xiaodong Liu, Jing Cheng, Yixuan Zheng, Tao Xue, Dan Tong, Bo Zheng, Yiran Peng, Xiaomeng Huang, Kebin He, Qiang Zhang
Summary: The study introduces a near real-time air pollutant database named Tracking Air Pollution in China (TAP), which combines ground observations, satellite AOD, and other data sources to provide daily 10 km resolution PM2.5 data. The database utilizes a two-stage machine learning model to estimate PM2.5 concentrations, improving performance at high pollution levels and filling gaps in AOD data. The availability of daily PM2.5 data for tracking changes over time and long-term records since 2000 will support policy assessments and health impact studies.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Environmental Sciences
Dan Xu, Wenpeng Lin, Jun Gao, Yue Jiang, Lubing Li, Fei Gao
Summary: This study introduces a seasonal spatial-temporal modeling method to assess the relationship between exposure to PM2.5 air pollution and public health. The results indicate that PM2.5 pollution risks are most severe in spring and winter, with high-risk areas predominantly located in densely populated regions of the Shanghai-Hangzhou Bay area in China.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Environmental Sciences
Xiaojuan Huang, Junke Zhang, Wei Zhang, Guiqian Tang, Yuesi Wang
Summary: The study found that there are seasonal variations in NH3 concentrations in Chengdu, with higher levels in the warmer seasons. NH3 deficiency in winter may lead to an increase in nitrogen oxidation ratio and contribution to nitrate and PM2.5 loadings. Controlling local and regional NH3 and NOx emissions synergistically could effectively mitigate PM2.5 pollution in Chengdu.
ENVIRONMENTAL POLLUTION
(2021)
Article
Geochemistry & Geophysics
Shiyu Luo, Kamal Saraband, Ling Tong, Sen Guo
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2020)
Article
Geochemistry & Geophysics
Shiyu Luo, Kamal Sarabandi, Ling Tong, Sen Guo
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2020)
Article
Physics, Multidisciplinary
Ming Li, Ling Tong, Xun Yang, Shiyu Luo, Yiwen Zhou
Summary: The subsurface profile is a crucial parameter for constructing an accurate scattering model of multilayer media. This paper investigates the conditions for using the flat subsurface approximation by comparing the scattering fields of a rough subsurface model and a flat subsurface model. The results help determine the applicable conditions for the flat subsurface approximation.
WAVES IN RANDOM AND COMPLEX MEDIA
(2022)
Article
Chemistry, Multidisciplinary
Quan Zhao, Ling Tong, Bo Gao
APPLIED SCIENCES-BASEL
(2020)
Article
Chemistry, Multidisciplinary
Dashuai Li, Ling Tong, Bo Gao
APPLIED SCIENCES-BASEL
(2020)
Article
Engineering, Electrical & Electronic
Ming Li, Ling Tong, Xun Yang
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2020)
Article
Chemistry, Multidisciplinary
Quan Zhao, Ling Tong, Bo Gao
Summary: This paper presents a linear phase sampling and accumulating (LPSA) algorithm for fast pulse compression, which achieves high amplitude accuracy and frequency resolution by selecting and accumulating sampling points with specific phase distributions.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Chemical
Dashuai Li, Ling Tong
Summary: This study successfully grew multi-walled carbon nanotubes on aluminum foils using the AMPCVD method, with iron impurities in the aluminum foils found to catalyze the growth of CNTs. The research also showed that CNTs have fewer defects at higher temperatures.
Article
Computer Science, Information Systems
Quan Zhao, Ling Tong, Bo Gao
Summary: In this paper, two simplified structures of single M(l)-C(s) CTS system are proposed for spectral analysis of stationary signals. These two simplified structures show the same performance in spectrum measurement as the classical two-channel CTS system, while requiring fewer devices, saving power consumption, reducing weight, and avoiding channel matching issues.
Article
Geochemistry & Geophysics
Shiyu Luo, Kamal Sarabandi, Ling Tong, Leland E. Pierce
Summary: This article proposes a new quantitative method for rainfall-induced landslide probability assessment based on safety factors (SFs) using soil moisture estimation from synthetic aperture radar (SAR) images. The effectiveness of the method is tested qualitatively and quantitatively through instrument verification and field investigation, showing that observed landslides are located in the unstable areas, indirectly verifying the proposed method.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2021)
Article
Geochemistry & Geophysics
Ming Li, Ling Tong, Yiwen Zhou, Yu Li, Xun Yang
Summary: The introduction of a Decomposition and Reconstruction Theorem (DRT) enhances computational efficiency and provides physical understanding for scattering from fractal surfaces. The TEBCM-DRT method significantly improves computational efficiency in solving scattering from realistic soil surfaces, demonstrating its validity and efficiency compared to other scattering models.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Instruments & Instrumentation
Bowei Zhang, Ling Tong, Bo Gao, Xun Gong, Zongjing Gu, Baoguo Yang, Shubiao Li, Shengli Liang, Fushun Nian
Summary: This paper presents a new two-tone measurement method for characterizing the nonlinearity and memory effects of mixers under different operating conditions. Utilizing a vector network analyzer (VNA) and signal generator (SG), the amplitude and phase of the IM3 product of the mixer can be accurately measured to show the characteristics of mixers in different amplitude regions under large carrier signal excitation.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Environmental Sciences
Fanghong Xiao, Ling Tong, Yuxia Li, Shiyu Luo, Jon Atli Benediktsson
Summary: This paper proposes a novel method for extracting road centerlines and junctions from segmented road maps. By modeling the road network as connected spline curves and dividing road pixels into clusters using perceptual grouping principles, smooth centerlines and precise junctions can be generated.
Article
Geochemistry & Geophysics
Ming Li, Ling Tong, Yiwen Zhou, Brandon O'Dell
Summary: This article proposes a closed-form asymptotic solution for the bistatic coherent scattering of a multilayered rough surface structure based upon its effective dielectric constant (EDC) in specular direction. The solution is obtained using the scalar Kirchhoff approximation (SKA) method. The study shows that the EDC and coherent reflectivity have different responses to soil moisture variations, indicating their potential for root-zone soil moisture retrieval. The simulation also demonstrates that subsurface roughness has a trivial effect on the EDC and coherent reflectivity for rough surfaces separated by continuous dielectric profiles.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Materials Science, Multidisciplinary
Dashuai Li, Ling Tong, Bo Gao