17 results match your criteria Advances In Atmospheric Sciences[Journal]

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The Impact of the Numbers of Monitoring Stations on the National and Regional Air Quality Assessment in China During 2013-18.

Adv Atmos Sci 2022 May 29:1-12. Epub 2022 May 29.

LAPC & ICCES, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029 China.

China national air quality monitoring network has become the core data source for air quality assessment and management in China. However, during network construction, the significant change in numbers of monitoring sites with time is easily ignored, which brings uncertainty to air quality assessments. This study aims to analyze the impact of change in numbers of stations on national and regional air quality assessments in China during 2013-18. Read More

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Observational Subseasonal Variability of the PM Concentration in the Beijing-Tianjin-Hebei Area during the January 2021 Sudden Stratospheric Warming.

Adv Atmos Sci 2022 May 16:1-14. Epub 2022 May 16.

Key Laboratory of Meteorological Disaster, Ministry of Education (KLME) / Joint International Research Laboratory of Climate and Environment Change (ILCEC) / Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), Nanjing University of Information Science and Technology, Nanjing, 210044 China.

It is still not well understood if subseasonal variability of the local PM in the Beijing-Tianjin-Hebei (BTH) region is affected by the stratospheric state. Using PM observations and the ERA5 reanalysis, the evolution of the air quality in BTH during the January 2021 sudden stratospheric warming (SSW) is explored. The subseasonal variability of the PM concentration after the SSW onset is evidently enhanced. Read More

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A Causality-guided Statistical Approach for Modeling Extreme Mei-yu Rainfall Based on Known Large-scale Modes-A Pilot Study.

Adv Atmos Sci 2022 May 14:1-16. Epub 2022 May 14.

Department of Meteorology and NCAS, University of Reading, Reading, RG6 6BB UK.

Extreme Mei-yu rainfall (MYR) can cause catastrophic impacts to the economic development and societal welfare in China. While significant improvements have been made in climate models, they often struggle to simulate local-to-regional extreme rainfall (e.g. Read More

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Characterization of Regional Combustion Efficiency using ΔXCO: ΔXCO Observed by a Portable Fourier-Transform Spectrometer at an Urban Site in Beijing.

Adv Atmos Sci 2022 May 11:1-17. Epub 2022 May 11.

Carbon Neutrality Research Center, Institute of Atmospheric Physics, Chinese Academy of Science, Beijing, 100029 China.

Measurements of column-averaged dry-air mole fractions of carbon dioxide and carbon monoxide, CO (XCO) and CO (XCO), were performed throughout 2019 at an urban site in Beijing using a compact Fourier Transform Spectrometer (FTS) EM27/SUN. This data set is used to assess the characteristics of combustion-related CO emissions of urban Beijing by analyzing the correlated daily anomalies of XCO and XCO (e.g. Read More

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Transport Patterns and Potential Sources of Atmospheric Pollution during the XXIV Olympic Winter Games Period.

Adv Atmos Sci 2022 Apr 6:1-15. Epub 2022 Apr 6.

State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029 China.

The attainment of suitable ambient air quality standards is a matter of great concern for successfully hosting the XXIV Olympic Winter Games (OWG). Transport patterns and potential sources of pollutants in Zhangjiakou (ZJK) were investigated using pollutant monitoring datasets and a dispersion model. The PM concentration during February in ZJK has increased slightly (28%) from 2018 to 2021, mostly owing to the shift of main potential source regions of west-central Inner Mongolia and Mongolian areas (2015-18) to the North China Plain and northern Shanxi Province (NCPS) after 2018. Read More

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Seasonal Predictions of Summer Precipitation in the Middle-lower Reaches of the Yangtze River with Global and Regional Models Based on NUIST-CFS1.0.

Adv Atmos Sci 2022 Mar 29:1-18. Epub 2022 Mar 29.

Institute for Climate and Application Research (ICAR)/ILCEC, Key Laboratory of Meteorological Disaster, Nanjing University of Information Science and Technology, Nanjing, 210044 China.

Accurate prediction of the summer precipitation over the middle and lower reaches of the Yangtze River (MLYR) is of urgent demand for the local economic and societal development. This study assesses the seasonal forecast skill in predicting summer precipitation over the MLYR region based on the global Climate Forecast System of Nanjing University of Information Science and Technology (NUIST-CFS1.0, previously SINTEX-F). Read More

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Comparison of PM and CO Concentrations in Large Cities of China during the COVID-19 Lockdown.

Adv Atmos Sci 2022 16;39(6):861-875. Epub 2022 Mar 16.

Collaborative Innovation Center for Western Ecological Safety (CIWES), College of Atmospheric Sciences, Lanzhou University, Lanzhou, 730000 China.

Estimating the impacts on PM pollution and CO emissions by human activities in different urban regions is important for developing efficient policies. In early 2020, China implemented a lockdown policy to contain the spread of COVID-19, resulting in a significant reduction of human activities. This event presents a convenient opportunity to study the impact of human activities in the transportation and industrial sectors on air pollution. Read More

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The Chinese Carbon-Neutral Goal: Challenges and Prospects.

Adv Atmos Sci 2022 Jan 25:1-10. Epub 2022 Jan 25.

Institute of Energy, Environment and Economy, Tsinghua University, Beijing, 100084 China.

On 22 September 2020, within the backdrop of the COVID-19 global pandemic, China announced its climate goal for peak carbon emissions before 2030 and to reach carbon neutrality before 2060. This carbon-neutral goal is generally considered to cover all anthropogenic greenhouse gases. The planning effort is now in full swing in China, but the pathway to decarbonization is unclear. Read More

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January 2022

Urbanization Impact on Regional Climate and Extreme Weather: Current Understanding, Uncertainties, and Future Research Directions.

Adv Atmos Sci 2022 25;39(6):819-860. Epub 2022 Jan 25.

Pacific Northwest National Laboratory, Richland, WA 99354 USA.

Urban environments lie at the confluence of social, cultural, and economic activities and have unique biophysical characteristics due to continued infrastructure development that generally replaces natural landscapes with built-up structures. The vast majority of studies on urban perturbation of local weather and climate have been centered on the urban heat island (UHI) effect, referring to the higher temperature in cities compared to their natural surroundings. Besides the UHI effect and heat waves, urbanization also impacts atmospheric moisture, wind, boundary layer structure, cloud formation, dispersion of air pollutants, precipitation, and storms. Read More

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January 2022

A New Index Developed for Fast Diagnosis of Meteorological Roles in Ground-Level Ozone Variations.

Adv Atmos Sci 2022 20;39(3):403-414. Epub 2022 Jan 20.

Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Institute for Environmental and Climate Research, Jinan University, Guangzhou, 510632 China.

China experienced worsening ground-level ozone (O) pollution from 2013 to 2019. In this study, meteorological parameters, including surface temperature ( ), solar radiation (SW), and wind speed (WS), were classified into two aspects, (1) Photochemical Reaction Condition (PRC = × SW) and (2) Physical Dispersion Capacity (PDC = WS). In this way, a Meteorology Synthetic Index (MSI = PRC/PDC) was developed for the quantification of meteorology-induced ground-level O pollution. Read More

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January 2022

Another Record: Ocean Warming Continues through 2021 despite La Niña Conditions.

Adv Atmos Sci 2022 11;39(3):373-385. Epub 2022 Jan 11.

National Oceanic and Atmospheric Administration, National Centers for Environmental Information, Silver Spring, Maryland 20910 USA.

The increased concentration of greenhouse gases in the atmosphere from human activities traps heat within the climate system and increases ocean heat content (OHC). Here, we provide the first analysis of recent OHC changes through 2021 from two international groups. The world ocean, in 2021, was the hottest ever recorded by humans, and the 2021 annual OHC value is even higher than last year's record value by 14 ± 11 ZJ (1 zetta J = 10 J) using the IAP/CAS dataset and by 16 ± 10 ZJ using NCEI/NOAA dataset. Read More

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January 2022

The Anomalous Mei-yu Rainfall of Summer 2020 from a Circulation Clustering Perspective: Current and Possible Future Prevalence.

Adv Atmos Sci 2021 31;38(12):2010-2022. Epub 2021 Aug 31.

Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 10029 China.

Highly unusual amounts of rainfall were seen in the 2020 summer in many parts of China, Japan, and South Korea. At the intercontinental scale, case studies have attributed this exceptional event to a displacement of the climatological western North Pacific subtropical anticyclone, potentially associated Indian Ocean sea surface temperature patterns and a mid-latitude wave train emanating from the North Atlantic. Using clusters of spatial patterns of sea level pressure, we show that an unprecedented 80% of the 2020 summer days in East Asia were dominated by clusters of surface pressure greater than normal over the South China Sea. Read More

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Spatial and Temporal Distributions and Sources of Anthropogenic NMVOCs in the Atmosphere of China: A Review.

Adv Atmos Sci 2021 30;38(7):1085-1100. Epub 2021 Apr 30.

Key Lab of Geographic Information Science of the Ministry of Education, School of Geographic Sciences, East China Normal University, Shanghai, 200241 China.

As the key precursors of O, anthropogenic non-methane volatile organic compounds (NMVOCs) have been studied intensively. This paper performed a meta-analysis on the spatial and temporal variations of NMVOCs, their roles in photochemical reactions, and their sources in China, based on published research. The results showed that both non-methane hydrocarbons (NMHCs) and oxygenated VOCs (OVOCs) in China have higher mixing ratios in the eastern developed cities compared to those in the central and western areas. Read More

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The 2020 Summer Floods and 2020/21 Winter Extreme Cold Surges in China and the 2020 Typhoon Season in the Western North Pacific.

Adv Atmos Sci 2021 26;38(6):896-904. Epub 2021 Apr 26.

State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301 China.

China experienced significant flooding in the summer of 2020 and multiple extreme cold surges during the winter of 2020/21. Additionally, the 2020 typhoon season had below average activity with especially quiet activity during the first half of the season in the western North Pacific (WNP). Sea surface temperature changes in the Pacific, Indian, and Atlantic Oceans all contributed to the heavy rainfall in China, but the Atlantic and Indian Oceans seem to have played dominant roles. Read More

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Characteristics of Chemical Speciation in PM in Six Representative Regions in China.

Adv Atmos Sci 2021 7;38(7):1101-1114. Epub 2021 Apr 7.

Key Laboratory of Geographic Information Science (Ministry of Education), School of Geographic Sciences, East China Normal University, Shanghai, 200241 China.

A better knowledge of aerosol properties is of great significance for elucidating the complex mechanisms behind frequently occurring haze pollution events. In this study, we examine the temporal and spatial variations in both PM and its major chemical constituents using three-year field measurements that were collected in six representative regions in China between 2012 and 2014. Our results show that both PM and its chemical compositions varied significantly in space and time, with high PM loadings mainly observed in the winter. Read More

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The Record-breaking Mei-yu in 2020 and Associated Atmospheric Circulation and Tropical SST Anomalies.

Adv Atmos Sci 2021 6;38(12):1980-1993. Epub 2021 Apr 6.

Climate Prediction Center, NCEP/NOAA, College Park, MD 20740 USA.

The record-breaking mei-yu in the Yangtze-Huaihe River valley (YHRV) in 2020 was characterized by an early onset, a delayed retreat, a long duration, a wide meridional rainbelt, abundant precipitation, and frequent heavy rainstorm processes. It is noted that the East Asian monsoon circulation system presented a significant quasi-biweekly oscillation (QBWO) during the mei-yu season of 2020 that was associated with the onset and retreat of mei-yu, a northward shift and stagnation of the rainbelt, and the occurrence and persistence of heavy rainstorm processes. Correspondingly, during the mei-yu season, the monsoon circulation subsystems, including the western Pacific subtropical high (WPSH), the upper-level East Asian westerly jet, and the low-level southwesterly jet, experienced periodic oscillations linked with the QBWO. Read More

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Tower-Based Greenhouse Gas Measurement Network Design---The National Institute of Standards and Technology North East Corridor Testbed.

Adv Atmos Sci 2017 Sep 5;34(9):1095-1105. Epub 2017 Aug 5.

National Institute of Standards and Technology, Gaithersburg, MD20899, USA.

The North-East Corridor (NEC) Testbed project is the 3rd of three NIST (National Institute of Standards and Technology) greenhouse gas emissions testbeds designed to advance greenhouse gas measurements capabilities. A design approach for a dense observing network combined with atmospheric inversion methodologies is described. The Advanced Research Weather Research and Forecasting Model with the Stochastic Time-Inverted Lagrangian Transport model were used to derive the sensitivity of hypothetical observations to surface greenhouse gas emissions (footprints). Read More

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September 2017
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