Long-term (2010–2021) lidar observations of stratospheric aerosols at Wuhan, China DOI Creative Commons
Yun He, Dongzhe Jing, Zhenping Yin

et al.

Published: May 30, 2024

Abstract. Stratospheric aerosols are long-lived and play a critical role in the global radiation budget. Over past decade, contributions to stratospheric from different sources have changed due weaker volcanic activity more frequent wildfire events. However, long-term observations of monitoring major emission events remain insufficient, particularly at middle low latitudes. In this study, we analyze vertical distribution, optical properties, radiative forcing using ground-based polarization lidar Wuhan (30.5° N, 114.4° E) 2010 2021. The aerosol depth (sAOD) generally stabilized around 0.0023 without significant annual variation. Several cases wildfire-induced smoke were observed. Volcanic Nabro (2011) Raikoke (2019) eruptions (both boreal summer) increased sAOD 4.8 times background level during stratospheric-quiescent period (January 2013 August 2017). Tracers Canadian summer 2017 was observed twice: 19–21 km on 14–17 September 20–23 28–31 October, with plume-isolated AOD 0.002–0.010 particle linear depolarization ratio δp 0.14–0.18, indicating dominance non-aged particles. During these summertime events, injected captured by large-scale Asian monsoon anticyclone (AMA), confining transport pathway mid-latitude Asia. On 8–9 November 2020, plumes originating California October 2020 appeared 16–17 km, 0.007 mean 0.13. Regarding seasonal variation, cold half-year (0.0026) is 24 % larger than warm (0.0021) stronger meridional tropics -0.05 W·m-2 -0.28 when largely injected. These findings contribute our understanding patterns over Asia serve as important database for validation model outputs.

Language: Английский

Long-term characteristics of dust aerosols over central China from 2010 to 2020 observed with polarization lidar DOI Open Access
Dongzhe Jing, Yun He, Zhenping Yin

et al.

Atmospheric Research, Journal Year: 2023, Volume and Issue: 297, P. 107129 - 107129

Published: Nov. 25, 2023

Language: Английский

Citations

2
Three-Dimensional Distribution and Transport Features of Dust and Polluted Dust over China and Surrounding Areas from CALIPSO DOI Creative Commons
Xiaofeng Xu,

Yudi Yang,

Zixu Xiong

et al.

Remote Sensing, Journal Year: 2023, Volume and Issue: 15(24), P. 5734 - 5734

Published: Dec. 15, 2023

Dust plays a very important role in the Earth’s climate system by its direct and indirect effects. Deserts northwestern China contribute large amount of dust particles, both inland outside, while vertical distribution transport mechanism still have many uncertainties. Using Level 3 cloud-free monthly aerosol products Cloud–Aerosol Lidar Infrared Pathfinder Satellite Observations (CALIPSO) from 2007 to 2020, we analyzed spatial temporal variations features for polluted aerosols over surrounding areas. The results show that Taklimakan Desert (TD) Thar (TRD) always act as high-value centers optical depth (DOD), (PDOD) are located eastern China, Sichuan Basin Indian subcontinent. DOD shows an increasing trend most areas, PDOD presents significant decrease increase central India, respectively. largest appears spring TD Gobi (GD), summer is TRD. Although dusts TRD concentrated below 4 km, they may be higher TD. Most confined under 2 km. input Tibetan Plateau (TP) could come occurs mostly summer, South Asia subcontinent contained boundary layer winter, but extend much which favors their into southwestern China. apparent seasonality. Its top reaches level base stays at similar height all seasons. thickest spring. overlapping layers present different patterns regions, suggests diverse mixture processes pollutants. Finally, compared found influences meteorological factors, such wind field, precipitation, on sources other

Language: Английский

Citations

2
Profiling of Aerosols and Clouds over High Altitude Urban Atmosphere in Eastern Himalaya: A Ground-Based Observation Using Raman LIDAR DOI Creative Commons

Trishna Bhattacharyya,

Abhijit Chatterjee, Sanat Kumar Das

et al.

Atmosphere, Journal Year: 2023, Volume and Issue: 14(7), P. 1102 - 1102

Published: June 30, 2023

Profiles of aerosols and cloud layers have been investigated over a high-altitude urban atmosphere in the eastern Himalayas India, for first time, using Raman LIDAR. The study was conducted post-monsoon season Darjeeling (latitude 27°01′ N longitude 88°36′ E, 2200 masl), tourist destination north-eastern India. In addition to characterization atmospheric boundary layer detection, profile water vapor mixing ratio has also analyzed. Effects dynamics studied vertical profiles normalized standard deviation RCS along with ratio. aerosol optical characteristics below above Atmospheric Boundary Layer (ABL) region were separately, interrelation their microphysical properties synoptic meteorological parameters. backscatter coefficient extinction found range from 7.15×10−10 m−1 sr−1 3.01×10−5 1.02×10−5 2.28×10−3 m−1, respectively. LIDAR varies between 3.9 78.39 sr all altitudes. variation linear depolarization 0.19 0.32 indicates dominance, non-spherical particles. periodicity observed different parameters may be indicative wave phenomena. Cloud parameters, such as scattering coefficients, top bottom height, depth phases, evaluated. A co-located Micro Rain Radar used life cycle study.

Language: Английский

Citations

1
Analysis of the Grassland Fires Effect on Dust Weather in Mongolia Based on Satellite-Derived Data DOI Open Access

Ling Wen,

Mei Yong, Yulong Bao

et al.

Published: Oct. 12, 2023

As major natural disasters in grassland areas, fires and dust events seriously threaten human safety, property, animal husbandry. Furthermore, these phenomena may be mutually reinforcing, which can lead to more severe cascading disasters. However, few studies have been on the mechanisms of fire disaster chain. Therefore, we selected Dornod aimag (province), a typical temperate grassland, as study area analyzed spatiotemporal variation patterns weather, well effect weather based MCD64A1 Burnt Area data SYNOP data. The mechanism was further investigated using MOD13A3 vegetation index product ERA5 wind speed, direction, precipitation results revealed that varied spatially across area. occurred mainly spring (April May), summer (June), autumn (October), while (March May). Moreover, autumn, winter, cumulative (both days area) substantially affected total storm days, particularly days. Additionally, higher 2014 resulted coverage fuel winter 2014, even 2015. result, higher, larger from September April 2015, leading considerable increase May This has important implications for prevention mitigation, ecological environmental protection, sustainable development grasslands.

Language: Английский

Citations

1
Long-term (2010–2021) lidar observations of stratospheric aerosols at Wuhan, China DOI Creative Commons
Yun He, Dongzhe Jing, Zhenping Yin

et al.

Published: May 30, 2024

Abstract. Stratospheric aerosols are long-lived and play a critical role in the global radiation budget. Over past decade, contributions to stratospheric from different sources have changed due weaker volcanic activity more frequent wildfire events. However, long-term observations of monitoring major emission events remain insufficient, particularly at middle low latitudes. In this study, we analyze vertical distribution, optical properties, radiative forcing using ground-based polarization lidar Wuhan (30.5° N, 114.4° E) 2010 2021. The aerosol depth (sAOD) generally stabilized around 0.0023 without significant annual variation. Several cases wildfire-induced smoke were observed. Volcanic Nabro (2011) Raikoke (2019) eruptions (both boreal summer) increased sAOD 4.8 times background level during stratospheric-quiescent period (January 2013 August 2017). Tracers Canadian summer 2017 was observed twice: 19–21 km on 14–17 September 20–23 28–31 October, with plume-isolated AOD 0.002–0.010 particle linear depolarization ratio δp 0.14–0.18, indicating dominance non-aged particles. During these summertime events, injected captured by large-scale Asian monsoon anticyclone (AMA), confining transport pathway mid-latitude Asia. On 8–9 November 2020, plumes originating California October 2020 appeared 16–17 km, 0.007 mean 0.13. Regarding seasonal variation, cold half-year (0.0026) is 24 % larger than warm (0.0021) stronger meridional tropics -0.05 W·m-2 -0.28 when largely injected. These findings contribute our understanding patterns over Asia serve as important database for validation model outputs.

Language: Английский

Citations

0