Article
Environmental Sciences
Yuxuan Wang, Xiaobing Sun, Honglian Huang, Rufang Ti, Xiao Liu, Yizhe Fan
Summary: The distribution of aerosols in the atmosphere is critical and difficult to measure accurately. The use of oxygen absorption A-bands offers a unique opportunity to retrieve vertical aerosol profiles from satellite observations. In this study, the impact of various factors on aerosol retrieval, such as satellite observation geometry, spectral resolution, signal-to-noise ratio, particle size distribution, and prior knowledge, is quantified using information content theory. The results show that smaller scattering angles and higher spectral resolution result in increased information content, with the spectral resolution having a greater impact than the signal-to-noise ratio. Coarse-dominated aerosols are more sensitive to retrieval. The improvement in spectral resolution is demonstrated using information content metrics and error analysis.
Review
Environmental Sciences
Yidan Si, Qifeng Lu, Xingying Zhang, Xiuqing Hu, Fu Wang, Lei Li, Songyan Gu
Summary: This paper introduces the common technique of using satellite observation data to retrieve atmospheric pollution parameters and summarizes the new developments in detecting aerosol parameters with multi-angle and/or polarized remote sensing observation instruments. The research status of aerosol characteristics in recent years is discussed from the perspective of airborne, space-borne, and ground-based detections, introducing the advancements in data set accuracy evaluation, inversion algorithm improvement, and product application.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Environmental Sciences
Jianrong Bi, Zhengpeng Li, Dapeng Zuo, Fan Yang, Bowen Li, Junyang Ma, Zhongwei Huang, Qing He
Summary: This study investigated the vertical profiles and optical characteristics of dust aerosol in the hinterland of Taklimakan Desert. The results showed that dust events frequently occurred in the region, with dust particles being the predominant aerosol type. A summertime dust stagnation layer was observed persistently at 1.5-3.0 km height, and a deep and intense daytime convective structure was detected.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Environmental Sciences
Longlong Wang, Marija Bervida Macak, Samo Stanic, Klemen Bergant, Asta Gregoric, Luka Drinovec, Grisa Mocnik, Zhenping Yin, Yang Yi, Detlef Mueller, Xuan Wang
Summary: This study aims to investigate the vertical variability of aerosol types within and above the Vipava valley in the Alpine region. By utilizing a dual-wavelength polarization Raman lidar system, the study reveals the vertical impact of different aerosol types on this region, providing valuable insights into the complex terrain's air pollution during wintertime.
Article
Meteorology & Atmospheric Sciences
Yuhan Liu, Hongli Wang, Shengao Jing, Ming Zhou, Shenrong Lou, Kun Qu, Wanyi Qiu, Qian Wang, Shule Li, Yaqin Gao, Yusi Liu, Xiaobing Li, Zhong-Ren Peng, Junhui Chen, Keding Lu
Summary: The study found that the distribution of VOCs in Shanghai's Jinshan district is highly related to local ozone pollution control, mainly originating from industrial emissions. The concentrations of alkanes and aromatics varied in different height intervals, while the proportion of alkenes decreased.
ADVANCES IN ATMOSPHERIC SCIENCES
(2021)
Article
Environmental Sciences
Lei Ji, Weixin Xu, Haonan Chen, Nana Liu
Summary: This study compares the consistency of radar measurements between two precipitation radars onboard different satellites and investigates the possible reasons for discrepancies. The results show good agreement in vertical profiles of reflectivity and echo-top height for most precipitation types, with some differences observed in weak convection and shallow precipitation. Possible factors contributing to these differences include clutter, beam-mismatch, non-uniform beam filling, and insufficient sampling. Additionally, a 23-year climatology analysis reveals no significant trend in convective depth over the past two decades.
Article
Meteorology & Atmospheric Sciences
Yunpeng Shan, Xiaohong Liu, Lin Lin, Ziming Ke, Zheng Lu, Simone Tilmes, Lan Gao, Pengfei Yu
Summary: In this study, a physically-based aerosol wet removal scheme is implemented into a global climate model to improve the representation of aerosol vertical distribution. The evaluation against observations shows significant improvements over the default scheme, highlighting the importance of accurate representation of aerosol wet removal. The improved aerosol wet removal scheme leads to a more reflective cloud radiative forcing on a global scale.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
Review
Environmental Sciences
Sam Purkis, Ved Chirayath
Summary: This article discusses the wide range of remote sensing technologies currently applied in oceans, highlighting next-generation technologies that may revolutionize the field, while also pointing out significant challenges in ocean remote sensing. Despite oceans comprising over 90% of the habitable volume of Earth, their imaging resolution is far below that of the moon and Mars. At this crucial historical moment, our understanding of rapidly changing marine ecosystems is still limited by technological maturity and challenges.
ANNUAL REVIEW OF ENVIRONMENT AND RESOURCES
(2022)
Article
Environmental Sciences
Jian Zhu, Shanshan Wang, Xu Dao, Duanyang Liu, Jie Wang, Sanbao Zhang, Ruibin Xue, Guigang Tang, Bin Zhou
Summary: Ground-based MAX-DOAS instruments were used to observe aerosol in urban and suburban areas of Shanghai, showing time delay and altitude distribution differences between different sites, possibly due to varying influences of aerosol transport and boundary layer dynamics. There was mutual aerosol transport between urban and suburban areas, affecting aerosol optical properties in these regions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Lingyu Wang, Baolei Lyu, Yuqi Bai
Summary: Aerosol vertical structures are analyzed through spatial clustering of CALIOP aerosol profiles using a fuzzy k-means method. Results show that normalized aerosol profiles provide insights into aerosol vertical structure patterns.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Review
Meteorology & Atmospheric Sciences
A. Marshak, A. Ackerman, A. M. da Silva, T. Eck, B. Holben, R. Kahn, R. Kleidman, K. Knobelspiesse, R. Levy, A. Lyapustin, L. Oreopoulos, L. Remer, O. Torres, T. Varnai, G. Wen, J. Yorks
Summary: This paper reviews the current state of knowledge of aerosol properties near clouds and quantitatively compares them with aerosols far from clouds. It discusses the correlation (and anticorrelation) between proximity to cloud and aerosol properties, demonstrates retrieval artifacts near clouds, and describes possible corrections for near-cloud enhancement in remote sensing retrievals. This study is timely in view of science definition studies for NASA's Aerosol, Cloud, Convection and Precipitation (ACCP) mission, which aims to directly link aerosol properties to nearby clouds.
BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY
(2021)
Article
Engineering, Environmental
Bo Zhang, Kai Gu, Peter Bayer, Fulin Xiang, Zhuang Wei, Baojun Wang, Bin Shi
Summary: This study aims to develop a convenient method to investigate vertical water flow in slopes on the sub-meter scale. The method is successfully validated in a laboratory tank with a series of experiments and has the ability to estimate flow rates greater than 1.0 x 10(-6) m.s(-1) and identify the influence of moving water on thermal profiles even at a flow rate of 1.0 x 10(-7) m.s(-1).
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Environmental Sciences
Qihou Hu, Cheng Liu, Qihua Li, Ting Liu, Xiangguang Ji, Yizhi Zhu, Chengzhi Xing, Haoran Liu, Wei Tan, Meng Gao
Summary: Previous studies have examined the influence of regional transport on aerosol pollution using numerical simulation or surface observation. However, vertical observations are necessary to fully understand regional transport due to the uneven vertical distribution of air pollutants. In this study, we used ground-based multi-axis differential optical absorption spectroscopy (MAX-DOAS) to obtain the vertical profiles of aerosol and its precursors in suburban Beijing. We found that southwest-northeast transport had maximum net transport fluxes in the 200-300 m, 100-200 m, 500-600 m, and 500-600 m layers for aerosol extinction coefficient (AEC), NO2, SO2, and HCHO, respectively.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
Kalliopi Artemis Voudouri, Konstantinos Michailidis, Nikolaos Siomos, Anthi Chatzopoulou, Georgios Kouvarakis, Nikolaos Mihalopoulos, Paraskevi Tzoumaka, Apostolos Kelessis, Dimitrios Balis
Summary: Two measurement campaigns were conducted in Thessaloniki to study aerosol properties, with biomass burning aerosols being the predominant type. Clean continental aerosols, dust layers, and mixtures with urban particles were also detected. Biomass burning layers were associated with high BC concentration and Fine Mode Fraction values.
Article
Environmental Sciences
David Cappelletti, Chiara Petroselli, David Mateos, Marcos Herreras, Luca Ferrero, Niccolo Losi, Asta Gregoric, Claudia Frangipani, Gianandrea La Porta, Michael Lonardi, D. G. Chernov, Alena Dekhtyareva
Summary: Airborne meteorological and aerosol measurements were conducted in Longyearbyen, providing valuable data on the vertical profiles of aerosol and meteorological properties in the Arctic. The study found that eBC and NP concentrations were higher in profiles with temperature inversions. The dataset is important for future modeling studies of Arctic pollution.
ATMOSPHERIC ENVIRONMENT
(2022)
