Article
Environmental Sciences
Xiang Weng, Grant L. Forster, Peer Nowack
Summary: This study used a data-driven machine learning approach to assess the impacts of meteorology on surface ozone variations in China from 2015 to 2019. The results showed that meteorological factors, both local and nonlocal, had a significant influence on ozone pollution, with nonlinear relationships being important. The nonlinear random forest regression (RFR) and linear ridge regression (RR) models performed better than the linear methods in predicting ozone concentrations.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)
Article
Engineering, Aerospace
Vineet Pratap, Akhilesh Kumar, Abhay Kumar Singh
Summary: The study investigated the variations in solar radiance, surface ozone, temperature, relative humidity and wind velocity during the annular solar eclipse of 21st June 2020. It was found that solar irradiance decreased significantly during the maximum phase of the eclipse, as did surface ozone concentrations. Atmospheric cooling induced dynamic changes to meteorological parameters during the eclipse.
ADVANCES IN SPACE RESEARCH
(2021)
Article
Environmental Sciences
Jin Hong, Wuke Wang, Zhixuan Bai, Jianchun Bian, Mengchu Tao, Paul Konopka, Felix Ploeger, Rolf Muller, Hongyue Wang, Jinqiang Zhang, Shuyun Zhao, Jintao Zhu
Summary: This study analyzed the variation of surface ozone levels in Beijing from 1995 to 2020 using multiple observational data sources, revealing a sudden decrease in 2011-2012 followed by an increasing trend, and documented a significant increase in the amplitude of the ozone annual cycle in Beijing for the first time.
Article
Environmental Sciences
Minghao Qiu, Corwin Zigler, Noelle E. Selin
Summary: Evaluating the influence of anthropogenic-emission changes on air quality requires considering the influence of meteorological variability. Widely used statistical methods perform poorly in correcting for meteorological variability and identifying long-term trends in ambient pollution related to changes in emissions. A random forest model that incorporates both local- and regional-scale meteorological features can reduce estimation errors and provide more accurate trend estimates.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)
Article
Meteorology & Atmospheric Sciences
Yuexuanzi Wang, Yingying Yan, Kunyu Duan, Shaofei Kong, Jintai Lin, Huang Zheng, Aili Song, Zexuan Zhang
Summary: The study found that on an interdecadal timescale, summer ozone concentrations in Central China are significantly correlated with spring thermal forcing over the Tibetan Plateau. High thermal forcing leads to lower ozone concentrations due to enhanced monsoon and vertical ascent, while low thermal forcing results in increased ozone concentrations. The study also noted that while total atmospheric energy has been increasing, summertime ozone concentrations have shown an increasing trend over the past two decades, partially offsetting the ozone reduction attributed to climate factors.
ATMOSPHERIC RESEARCH
(2021)
Article
Environmental Sciences
Muhammad Khan, Salman Tariq, Zia Ul Haq
Summary: Particulate pollution is a significant problem in developing countries like Pakistan, with aerosols having severe impacts on climate and human health. This study analyzed the optical and physical properties of aerosols using the ozone monitoring instrument (OMI) retrieved ultraviolet aerosol index (UVAI) over Pakistan from October 2004 to December 2021. The results showed spatial and temporal distribution, annual and seasonal trends of absorbing aerosols, as well as their relationship with meteorological parameters. The study also identified potential sources of aerosols in major cities and discussed natural and anthropogenic factors influencing absorbing aerosols. Various methods, such as afforestation and promotion of public transport networks, are suggested to reduce particulate pollution.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Yifei Xu, Ao Shen, Yinbao Jin, Yiming Liu, Xiao Lu, Shaojia Fan, Yingying Hong, Qi Fan
Summary: Ozone plays a significant role in human health, air pollution, and global warming. The increase in O3 concentration in China, despite the decline in NOx and VOCs, is attributed to the contribution of meteorological conditions. This study utilized the WRF-CMAQ model to demonstrate that changes in meteorology accounted for 85.8% of the elevated O3 concentration in urban Guangzhou, while changes in anthropogenic emissions explained 13.3%.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Geography, Physical
Wei Li, Jie Chen, Lu Li, Yvan J. Orsolini, Yiheng Xiang, Retish Senan, Patricia de Rosnay
Summary: Snow assimilation in the Tibetan Plateau has significant impacts on seasonal forecasts, improving the prediction of snow, temperature, and precipitation. However, in the eastern region, there is a decrease in the consistency between precipitation forecasts and satellite observations.
Article
Meteorology & Atmospheric Sciences
Zhixia Wang, Shengzhi Huang, Qiang Huang, Weili Duan, Guoyong Leng, Yi Guo, Xudong Zheng, Mingqiu Nie, Zhiming Han, Haixia Dong, Jian Peng
Summary: This study investigates the time-lag and step-abrupt effects of propagation from meteorological drought to hydrological drought and explores the seasonal dynamics and driving mechanisms of drought propagation. The findings reveal variations in the impacts of precipitation, temperature, potential evapotranspiration, and soil moisture on drought propagation dynamics across subbasins and seasons. Additionally, reservoirs are found to serve as a buffer for regulating the propagation from meteorological to hydrological droughts.
JOURNAL OF HYDROMETEOROLOGY
(2022)
Article
Meteorology & Atmospheric Sciences
Kyungmin Sung, James H. Stagge
Summary: The study addresses the complexity of analyzing meteorological drought trends by considering both seasonal patterns and long-term trends. The results identify clear regions based on precipitation seasonality, while showing that long-term trends do not align with the seasonality. The study's clustering analysis based on nonstationary meteorological drought trends can be valuable for informing water management strategies.
JOURNAL OF CLIMATE
(2022)
Article
Environmental Sciences
Xiaorui Zhang, Xiang Xiao, Fan Wang, Guy Brasseur, Siyu Chen, Jing Wang, Meng Gao
Summary: This study investigates the relationships between extreme air pollution events and meteorological conditions in China. The results show that surface winds and humidity are key drivers for high PM2.5 events, while surface temperature plays a dominant role in summer O-3 extremes. Under future climate scenarios, meteorological conditions are projected to favor an increase in winter PM2.5 extremes and more frequent summer O-3 extremes. Additionally, meteorological conditions over a longer period of time play a more important role in the formation of pollution extremes.
ENVIRONMENT INTERNATIONAL
(2022)
Article
Meteorology & Atmospheric Sciences
Ryan A. Zamora, Benjamin F. Zaitchik, Matthew Rodell, Augusto Getirana, Sujay Kumar, Kristi Arsenault, Ethan Gutmann
Summary: Research in meteorological prediction on subseasonal to seasonal time scales is growing, with an increasing demand for seasonal drought forecasting. Downscaling plays an important role in applying meteorological S2S forecasts for skillful drought forecasting. The use of the GARD algorithm for downscaling improved hindcast skill for total drought across the contiguous United States, with the most significant improvements seen in extreme and exceptional drought categories.
JOURNAL OF HYDROMETEOROLOGY
(2021)
Article
Environmental Sciences
Qiaoli Bu, Yingying Hong, Haobo Tan, Li Liu, Chunlin Wang, Jianjun Zhu, Pakwai Chan, Chen Chen
Summary: By analyzing meteorological and air quality data in Guangzhou, it was found that factors such as relative humidity, rainfall intensity, wind speed, sunshine duration, temperature, and wind direction significantly influence the concentrations of PM2.5 and O-3. The least favorable weather conditions occurred in 2014.
AEROSOL AND AIR QUALITY RESEARCH
(2021)
Article
Environmental Sciences
Natsumi Kawano, Tatsuya Nagashima, Seiji Sugata
Summary: The seasonal cycle of surface ozone has changed in Japan in the past few decades, with variations depending on the region. The relationship between monthly ozone mixing ratios in April and May can explain the changes in the temporal patterns of the seasonal cycle. Different chemical processes contribute to ozone increases in different periods.
ATMOSPHERIC ENVIRONMENT
(2022)
Article
Environmental Sciences
Caner Taskopru, Mutlu Ichedef, Muslim Murat Sac
Summary: The indoor radon concentration in Izmir province, Turkey, is relatively higher compared to other cities, but still lower than national and international reference values. The concentration shows an increasing and decreasing trend throughout the day, which can be attributed to the daily routine usage of the office and meteorological parameters.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2023)