The impact of volcanic eruptions, pyrocumulonimbus plumes, and the Arctic polar vortex intrusions on aerosol loading over Tomsk (Western Siberia, Russia) as observed by lidar from 2018 to 2022 DOI
V. V. Gerasimov, В. В. Зуев, E. S. Savelieva

et al.

International Journal of Remote Sensing, Journal Year: 2024, Volume and Issue: 45(16), P. 5464 - 5505

Published: July 26, 2024

Long-term ground-based lidar observations are important in estimating the contribution of different sources (mostly volcanic eruptions and wildfires) to aerosol loading atmosphere developing improving various climate models. In this paper, we carefully analyse scattering ratio profiles layers, observed with 532-nm measurements at Siberian Lidar Station Tomsk (56.48°N, 85.05°E) over period 2018–2022, identify layers' potential sources. To compare for last five years (2018–2022) that previous years, also present discuss time series integrated backscatter coefficient (IABC) three altitude ranges. The first range (15–30 km) reveals pure stratospheric provided by eruptions, second (11–15 is responsible mainly aftereffects wildfire smoke plumes, third one (11–30 demonstrates from both particular, found 2001–2022 annual average IABC reached its maximal values 2.91 × 10−4 sr−1 8.21 2022 due Hunga Tonga-Hunga Ha'apai eruption. 2020–2022 exhibited a significant increase relative content altitudes 11–15 km total 11–30 54.4% 2020 64.8% 2022, which indicates shift main part increased activity North America north-eastern Asia. Arctic polar vortex revealed distort real vertical distribution replacing it inside on measurement days when site.

Language: Английский

How air pollution affects cause-specific emergency hospital admissions on days with biomass combustion in Spain? DOI

E Botezat,

Cristina Pérez-Linares, Pedro Salvador

et al.

The Science of The Total Environment, Journal Year: 2025, Volume and Issue: 981, P. 179560 - 179560

Published: May 5, 2025

Language: Английский

Citations

0
Impact of wildfire smoke on Arctic cirrus formation – Part 1: Analysis of MOSAiC 2019–2020 observations DOI Creative Commons
Albert Ansmann, Cristofer Jiménez, Johanna Roschke

et al.

Atmospheric chemistry and physics, Journal Year: 2025, Volume and Issue: 25(9), P. 4847 - 4866

Published: May 9, 2025

Abstract. The potential impact of wildfire smoke on Arctic cirrus formation is discussed based lidar and radar observations during the winter half year 1-year MOSAiC (Multidisciplinary drifting Observatory for Study Climate) expedition. Aerosol ice cloud were performed aboard icebreaker Polarstern at latitudes > 85° N. Aged Siberian polluted tropopause region over central entire 2019–2020. particle surface area concentration was order 5–15 µm2 cm−3 indicated considerably enhanced levels aerosol pollution more than 6 months. Numerous systems with cloud-top temperatures between −60 −75 °C developed in upper troposphere. We analyzed all layers respect to their geometrical optical properties a subgroup 20 events water content (IWC) crystal number (ICNC). In individual fallstreaks that are connected nucleation events, ICNCs typically ranged from 1 10 crystals L−1 but frequently also as high 20–50 L−1; however, 100 rare. Three observational facts corroborate our hypothesis significantly influenced formation: (1) occurrence long-lasting, persistent layer troposphere so favorable conditions heterogeneous particles always given and, same time, homogeneous freezing background probably widely suppressed; (2) concentrations, which enough trigger (as shown Part 2, companion paper this article; Ansmann et al., 2025); (3) found maximum saturation ratios 1.3–1.5, point dominance processes, initiated by inefficient ice-nucleating (INPs), expected when aged (i.e., organic particles) serve INPs. studies continued simulation portion work (Part 2; 2025).

Language: Английский

Citations

0
Large-Scale Network-Based Observations of a Saharan Dust Event across the European Continent in Spring 2022 DOI Creative Commons
Christina–Anna Papanikolaou, Alexandros Papayannis, Marilena Gidarakou

et al.

Remote Sensing, Journal Year: 2024, Volume and Issue: 16(17), P. 3350 - 3350

Published: Sept. 9, 2024

Between 14 March and 21 April 2022, an extensive investigation of extraordinary Saharan dust intrusion over Europe was performed based on lidar measurements obtained by the European Aerosol Research Lidar Network (EARLINET). The episode divided into two distinct periods, one in April, characterized different transport paths. aerosol layers were studied 18 EARLINET stations, examining characteristics during four regions (M-I, M-II, M-III, M-IV A-I, A-II, A-III, A-IV, respectively), focusing parameters such as layer thickness, center mass (CoM), ratio (LR), particle linear depolarization (PLDR), Ångström exponents (ÅE). In March, exhibited varying geometrical optical properties, with mean CoM values ranging from approximately 3.5 to 4.8 km, LR typically between 36 54 sr. PLDR indicated presence both pure mixed aerosols, 0.20 0.32 at 355 nm 0.24 0.31 532 nm. ÅE suggested a range sizes, some showing predominance coarse particles. Optical Depth (AOD) simulations NAAPS model significant activity across Europe, AOD reaching up 1.60. observed 3.2 5.2 km. Mean ranged 35 51 sr nm, while confirmed 0.22 0.25 mixture sizes. generally lower, not exceeding 0.8, indicating less intense compared March. findings highlight spatial temporal variations regions, distinctive periods. From 15 16 significantly reduced UV-B radiation 14% ATZ station (Athens, GR). Backward air trajectories showed that originated Western Central Sahara when, this specific case, passed GRA (Granada, ES) PAY (Payerne, CH) before ATZ, maintaining high relative humidity almost stable properties throughout its transport. data revealed elevated backscatter (baer) values, combined low indicative aerosols.

Language: Английский

Citations

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

et al.

Atmospheric chemistry and physics, Journal Year: 2024, Volume and Issue: 24(19), P. 11431 - 11450

Published: Oct. 14, 2024

Abstract. This study analyzes the vertical distribution, optical properties, radiative forcing, and several perturbation events of stratospheric aerosols using observations from a ground-based polarization lidar in Wuhan (30.5° N, 114.4° E) 2010 to 2021. The background aerosol depth (sAOD) was 0.0044 ± 0.0019 at 532 nm, as calculated during stratosphere-quiescent period January 2013 August 2017. In addition, cases volcanic wildfire-induced smoke were observed. Volcanic Nabro (2011) Raikoke (2019) eruptions (both boreal summer) increased sAOD 2.9 times level. Tracers Canadian wildfire summer 2017 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, mean 0.13. Regarding seasonal variation, cold half-year (0.0054) is 69 % larger than warm (0.0032) due stronger meridional tropics middle latitudes. forcing −0.11 W m−2 −0.31 when largely injected. These findings contribute our understanding sources patterns over Asia serve an important database for validation model outputs.

Language: Английский

Citations

1
Observations for Chemistry (Remote Sensing): Lidar DOI
G. Vaughan

Elsevier eBooks, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Language: Английский

Citations

0
The impact of volcanic eruptions, pyrocumulonimbus plumes, and the Arctic polar vortex intrusions on aerosol loading over Tomsk (Western Siberia, Russia) as observed by lidar from 2018 to 2022 DOI
V. V. Gerasimov, В. В. Зуев, E. S. Savelieva

et al.

International Journal of Remote Sensing, Journal Year: 2024, Volume and Issue: 45(16), P. 5464 - 5505

Published: July 26, 2024

Long-term ground-based lidar observations are important in estimating the contribution of different sources (mostly volcanic eruptions and wildfires) to aerosol loading atmosphere developing improving various climate models. In this paper, we carefully analyse scattering ratio profiles layers, observed with 532-nm measurements at Siberian Lidar Station Tomsk (56.48°N, 85.05°E) over period 2018–2022, identify layers' potential sources. To compare for last five years (2018–2022) that previous years, also present discuss time series integrated backscatter coefficient (IABC) three altitude ranges. The first range (15–30 km) reveals pure stratospheric provided by eruptions, second (11–15 is responsible mainly aftereffects wildfire smoke plumes, third one (11–30 demonstrates from both particular, found 2001–2022 annual average IABC reached its maximal values 2.91 × 10−4 sr−1 8.21 2022 due Hunga Tonga-Hunga Ha'apai eruption. 2020–2022 exhibited a significant increase relative content altitudes 11–15 km total 11–30 54.4% 2020 64.8% 2022, which indicates shift main part increased activity North America north-eastern Asia. Arctic polar vortex revealed distort real vertical distribution replacing it inside on measurement days when site.

Language: Английский

Citations

0