Comment on acp-2022-241 DOI Creative Commons
Suping Zhao,

Shaofeng Qi,

Ye Yu

и другие.

Опубликована: Июль 1, 2022

Tibetan Plateau (TP, hereafter), known as “Third Pole”, is surrounded by the highly polluted regions, such Indo-Gangetic Plain, Taklimakan and Gobi Deserts Sichuan Basin. However, previous in-situ aerosol measurements mainly focused on southern northern slopes, while less observations studies were conducted at eastern slope of TP (ESTP). The scientific knowledge optical properties aerosols extremely limited over ESTP, varying altitudes from heavily regions to relatively clean important for better understanding light absorption radiative forcing TP. Basin (SCB), a region due more rapid economic development, located in east side Therefore, we first field experiment six sites (Chengdu, Sanbacun, Wenchuan, Lixian, Maerkang, Hongyuan) along extending elevation 500 m 3500 m. Light-absorbing are considered be key climate driver, their role may underestimated high-altitude regions. brown carbon (BrC) accounting that total increases 20 % 50 %, mass efficiency BrC 2–3 times higher than inside SCB, especially winter, which related high ratio secondary primary organic stronger formation emissions altitudes. Contrary aerosols, EC (elemental carbon) declines with altitude induced source difference between SCB. urban sources (motor vehicles, industries, etc.) SCB fail transported stable air basin also favorable aging enhance efficiency. relative varies 0.10 0.42 OC / thus enhanced pristine because concentration decreases slowly does EC. South Asia, particulate matter (PM) pollution region, an origin particles western Plateau, significantly dependent seasons.

Язык: Английский

Aerosol-cloud interactions over the Tibetan Plateau: An overview DOI
Yuzhi Liu, Jianping Huang, Tianhe Wang

и другие.

Earth-Science Reviews, Год журнала: 2022, Номер 234, С. 104216 - 104216

Опубликована: Окт. 14, 2022

Язык: Английский

Процитировано

50
In-situ observations reveal weak hygroscopicity in the Southern Tibetan Plateau: implications for aerosol activation and indirect effects DOI Creative Commons
Yuan Wang, Jiming Li, Fang Fang

и другие.

npj Climate and Atmospheric Science, Год журнала: 2024, Номер 7(1)

Опубликована: Март 23, 2024

Abstract As a precursor process to cloud formation, aerosol activation over the Tibetan Plateau (TP) plays pivotal role in regional cloud-precipitation and global climate. However, its characteristics remain unclear due absence of targeted observations TP. We conducted ground in-situ aerosol-cloud-precipitation experiment southern TP (GACPE-STP), thereby unveiling this crucial region. Our findings reveal weak capacity with low hygroscopicity ( κ ) values less than 0.1 through multi-method measurements, contrasting starkly widely recommended value 0.3 for continental regions. A parameterization is developed predicting region, which can significantly reduce overestimations droplet number concentration hence indirect effects caused by using 0.3. These address contributing enhancement precipitation climate simulations.

Язык: Английский

Процитировано

11
Divergent Urban Signatures in Rainfall Anomalies Explained by Pre‐Storm Environment Contrast DOI Creative Commons

Ye Shen,

Long Yang

Geophysical Research Letters, Год журнала: 2023, Номер 50(5)

Опубликована: Фев. 28, 2023

Abstract Diverse urban‐induced rainfall anomalies across different cities highlight the need for additional insights into land‐atmosphere interactions over complex urban environments. Based on empirical analyses of 144 warm‐season storms and high‐resolution numerical simulations Nanjing, China, we show divergent patterns with contrasting synoptic conditions, despite enhancement downtown from a climatological perspective. We propose two simple gage‐based metrics to characterize both thermal turbulent conditions in pre‐storm environment, classify groups. Our results that elevated magnitudes heavy frequency are equally expected either or suburb regions (upwind downwind). This is mainly dictated by relative dominance perturbations mechanical turbulence (i.e., related surface roughness) under conditions. develop four paradigms modification, thus provide predictive understanding

Язык: Английский

Процитировано

16
Quantifying evolution of soot mixing state from transboundary transport of biomass burning emissions DOI Creative Commons
Xiyao Chen, Chunxiang Ye, Yuanyuan Wang

и другие.

iScience, Год журнала: 2023, Номер 26(11), С. 108125 - 108125

Опубликована: Окт. 4, 2023

Язык: Английский

Процитировано

15
Variability of surface solar radiation under clear skies over Qinghai-Tibet Plateau: Role of aerosols and water vapor DOI Creative Commons
Lan Yu, Ming Zhang, Lunche Wang

и другие.

Atmospheric Environment, Год журнала: 2022, Номер 287, С. 119286 - 119286

Опубликована: Июль 15, 2022

Язык: Английский

Процитировано

22
Fossil and Nonfossil Sources of Winter Organic Aerosols in the Regional Background Atmosphere of China DOI
Yuxian Zhang, Fang Cao,

Wenhuai Song

и другие.

Environmental Science & Technology, Год журнала: 2024, Номер 58(2), С. 1244 - 1254

Опубликована: Янв. 5, 2024

Carbonaceous aerosols (CA) from anthropogenic emissions have been significantly reduced in urban China recent years. However, the relative contributions of fossil and nonfossil sources to CA rural background regions remain unclear. In this study, different carbonaceous fractions fine (PM2.5) five sites Meteorological Administration Atmosphere Watch Network during winter 2019 2020 were quantified using radiocarbon (14C) organic markers. The results showed that contributed 44–69% total carbon at these sites. Fossil fuel combustion was predominant source elemental all (73 ± 12%). Nonfossil dominated (OC) (61 13%), with biomass burning or biogenic-derived secondary (SOC) as most important contributors. OC (39 13%) still exceeds those other regional/background Asia, Europe, USA. SOC fuel-derived OC, highlighting impact regional transport on aerosol levels. It is therefore imperative develop implement reduction policies technologies tailored both biogenic mitigate environmental health risks pollution across China.

Язык: Английский

Процитировано

4
A New Method for Eliminating Dust Effects When Quantifying the Light Absorption Properties of Brown Carbon DOI Creative Commons
Chenguang Tang, Pengfei Tian, Xinghua Zhang

и другие.

Geophysical Research Letters, Год журнала: 2024, Номер 51(3)

Опубликована: Янв. 30, 2024

Abstract Accurate quantification of the absorption properties brown carbon (BrC) aerosols is crucial to assess Earth‐atmosphere radiative impacts BrC. However, BrC were often misestimated in field observations, due neglecting contribution dust absorption. This study solved this problem by coupling a method for calculating concentration into traditional model quantifying The results show that was up 16.8% sum and northwestern China. potential significantly higher Asia‐located studies (0.4%–16.8%) than Americas‐located (<1.2%) Europe‐located (<2.3%) studies. work underscores necessity eliminating negative effect quantitative model. It prompts us revisit resolved previous studies, especially dust‐influenced areas such as Asia.

Язык: Английский

Процитировано

4
Aerosol optical properties over three cities of Angola using long term AERONET data DOI
Pascoal M. D. Campos,

Angella G. Moses,

Ke Li

и другие.

Atmospheric Pollution Research, Год журнала: 2025, Номер unknown, С. 102559 - 102559

Опубликована: Апрель 1, 2025

Язык: Английский

Процитировано

0
The interactions of aerosol and planetary boundary layer over a large city in the Mongolian Plateau DOI
Yongjing Ma, Jinyuan Xin,

Yongli Tian

и другие.

The Science of The Total Environment, Год журнала: 2023, Номер 907, С. 167985 - 167985

Опубликована: Окт. 20, 2023

Язык: Английский

Процитировано

6
Measurement report: Contrasting elevation-dependent light absorption by black and brown carbon: lessons from in situ measurements from the highly polluted Sichuan Basin to the pristine Tibetan Plateau DOI Creative Commons
Suping Zhao,

Shaofeng Qi,

Yu Ye

и другие.

Atmospheric chemistry and physics, Год журнала: 2022, Номер 22(22), С. 14693 - 14708

Опубликована: Ноя. 18, 2022

Abstract. Scientific knowledge about light absorption by aerosols is extremely limited at the eastern slope of Tibetan Plateau (ESTP). We conducted first aerosol field experiment six sites (Chengdu, Sanbacun, Wenchuan, Lixian, Maerkang, Hongyuan) along ESTP, ranging in elevation from 500 to 3500 m. The fraction brown carbon (BrC) total increases 20 % 50 with altitude, and mass efficiency (MAE) BrC over (TP) 2–3 times higher than that inside Sichuan Basin (SCB), especially winter. In contrast, MAE elemental (EC) winter decreases altitude. contrasting variation EC altitude mainly attributed source differences between TP SCB. Emissions more urban sources (motor vehicles, industries, etc.) SCB fail be transported due stable air basin, which also favourable for ageing enhance efficiency. radiative forcing relative varies 0.10 0.42 as organic (OC) ratio Thus, reason enhanced polluted pristine concentration slowly This study contributes understanding difference lower-altitude basins TP, provides a data set regional climate model validation.

Язык: Английский

Процитировано

10