Extreme smoke event over the high Arctic

Ranjbar, Keyvan; O’Neill, N. T.; Lutsch, Erik; McCullough, Emily; Fetouh, Y. AboEl; Xian, Peng; Strong, Kimberly; Fioletov, Vitali; Lesins, Glen; Abboud, Ihab

doi:10.1016/j.atmosenv.2019.117002

Cited by 12 publications

(15 citation statements)

References 35 publications

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“…This results from general arguments of the isentropic lift of smoke particles from southern (Boreal forest) fires coupled with a considerable accumulation of smoke plume observations over the Arctic (cf., e.g., O'Neill et al, 2008 and Saha et al, 2010). To add quantitative support to this qualitative argument, Ranjbar et al (2019) employed (2005 to 2010) AHSRL (Arctic High Spectral Resolution Lidar) profiles over Eureka and 1 year of KARL (Kodeway Aerosol Raman Lidar) profiles over Ny Alesund to compute optically averaged smoke plume heights that were ~3 km at both sites.…”

Section: Resultsmentioning

confidence: 99%

Climatological‐Scale Analysis of Intensive and Semi‐intensive Aerosol Parameters Derived From AERONET Retrievals Over the Arctic

et al. 2020

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We investigated the climatological-scale, monthly binned, seasonal variation of AERONET/Dubovik retrievals across six stations in the North American and European Arctic (multiyear sampling periods ranging from 8 to 17 years). A robust, spring-to-summer (StoS) increase in the radius of the peak of the fine mode (FM) component of the particle size distribution (PSD) was observed for five of the six stations. The FM aerosol optical depth (AOD) and the FM effective radius at the individual stations showed, respectively, a negligible to moderate StoS decrease and a significant increase. This was interpreted as a trade-off between the waning influence of smaller FM Arctic haze aerosols and the increasing influence of large FM smoke particles. A springtime, pan-Arctic PSD peak in the 1.3 μm coarse mode (CM) bin was attributed to Asian dust. It was suggested that the increase in amplitude of a second (4-7 μm) CM peak from July to August at the low-elevation coastal sites was influenced by wind-induced sea salt. The CM AOD went through a StoS decrease attributed to the decreasing amplitude of the 1.3 μm peak. A significant StoS CM effective radius increase was ascribed to the decreasing influence of the 1.3 μm peak. StoS FM fraction increases were largely due to the decrease of the CM AOD (decreasing influence of springtime Asian dust). This extensive and intensive climatology of remotely sensed, bimodal properties will, we believe, provide an important reference for future measurements and modeling of Arctic aerosols.

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Section: Resultsmentioning

confidence: 99%

Climatological‐Scale Analysis of Intensive and Semi‐intensive Aerosol Parameters Derived From AERONET Retrievals Over the Arctic

et al. 2020

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“…The strong peak AODs in August 2017 over Resolute Bay, Eureka and Thule were most probably related to intense, fire-induced pyroCB events in North America and the longrange transport of high-altitude smoke (Ranjbar et al, 2019;Das et al, 2021). The high amplitude AOD peak in the spring of 2006 over Hornsund was traced to agricultural fires in Eastern Europe (Stohl et al, 2007).…”

Section: Arctic Aod Climatology Derived From Aerosol Reanalysesmentioning

confidence: 99%

“…These extreme smoke cases could be caused by intense fireinduced pyroCB events that inject smoke high in the troposphere or even well into the stratosphere (Fromm et al, 2010;Peterson et al, 2018). An example pyro-CB smoke event that occurred over British Columbia in August 2017 lead to a record-high AOD in the Canadian high Arctic (Ranjbar et al, 2019;Torres et al, 2020). More recently, Eastern Siberian fires burned during June -August 2021 facilitated more than a dozen cases of smoke intrusion into the high Arctic.…”

Section: General Statistics Of Extreme Eventsmentioning

confidence: 99%

“…There are many studies on aerosol optical properties that are based on long-term site measurements (e.g. Herber et al, 2002;Tomasi et al, 2007;Eck et al, 2009;Saha et al, 2010;Glantz et al, 2014;Ranjbar et al, 2019;AboEl-Fetouh et al, 2020), however, the number of the sites is limited, and the sites are mostly located on the northern edge of the North American, Eurasian continents, and the Svalbard region, not yielding a continuous spatial distribution.…”

Section: Introductionmentioning

confidence: 99%

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Arctic spring and summertime aerosol optical depth baseline from long-term observations and model reanalyses, with implications for the impact of regional biomass burning processes

Xian

Zhang

Toth

et al. 2021

Preprint

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Abstract. We present an Arctic aerosol optical depth (AOD) climatology and trend analysis for 2003–2019 spring and summertime periods derived from a combination of multi-agency aerosol reanalyses, remote sensing retrievals, and ground observations. This includes the U.S. Navy Aerosol Analysis and Prediction System ReAnalysis version 1 (NAAPS-RA v1), the NASA Modern-Era Retrospective Analysis for Research and Applications, version 2 (MERRA-2), and the Copernicus Atmosphere Monitoring Service ReAnalysis (CAMSRA). Space-borne remote sensing retrievals of AOD are considered from the Moderate Resolution Imaging Spectroradiometer (MODIS), the Multi-angle Imaging SpectroRadiometer (MISR), and Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP). Ground-based data include sun photometer data from Aerosol Robotic Network (AERONET) sites and oceanic Maritime Aerosol Network (MAN) measurements. Aerosol reanalysis AODs and space-borne retrievals show consistent climatological spatial patterns and trends for both spring and summer seasons over the sub-Arctic (60–70° N). Consistent signs in the AOD trend are also found for the high Arctic (north of 70° N) from reanalyses. The aerosol reanalyses yield more consistent AOD results than climate models, verify well with AERONET, and corroborate complementary climatological and trend analysis. Speciated AODs are more variable than total AOD among the three reanalyses, and a little more so for March–May (MAM) than for June–August (JJA). Black Carbon (BC) AOD in the Arctic comes predominantly from biomass burning sources in both MAM and JJA, and biomass burning overwhelms anthropogenic sources in JJA for the study period. AOD exhibits a negative trend in the Arctic in MAM, and a positive trend in JJA during 2003–2019, due to an overall decrease in sulfate/anthropogenic pollutions, and a significant increase in biomass burning smoke in JJA. Interannual Arctic AOD variability is significantly large, driven by fine-mode, and specifically, biomass burning (BB) smoke, though more so in JJA than in MAM. Extreme AOD events during spring and summer in the Arctic, defined as AOD greater than the 95th percentile value, are mainly attributed to BB smoke transport events. Extreme AOD cases tend to occur later in the season (i.e., July and August, in the latter decade rather than spreading over April–August in the early decade during 2003–2019) corresponding to a shift to a later time in extreme boreal BB activities.

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“…Long range transported aerosol from biomass burning affects polar regions, especially the Arctic [10][11][12][13][14][15], but also Antarctica [7,16,17]. The occurrence of bushfires is likely to increase due to climate change [18,19] and thus the occurrence of aerosol events caused by long-range transported smoke over polar regions.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Stratospheric Smoke Particles over the Antarctica by Remote Sensing Instruments

et al. 2020

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Australian smoke from the extraordinary biomass burning in December 2019 was observed over Marambio, Antarctica from the 7th to the 10th January, 2020. The smoke plume was transported thousands of kilometers over the Pacific Ocean, and reached the Antarctic Peninsula at a hight of 13 km, as determined by satellite lidar observations. The proposed origin and trajectory of the aerosol are supported by back-trajectory model analyses. Ground-based Sun–Sky–Moon photometer belonging to the Aerosol Robotic Network (AERONET) measured aerosol optical depth (500 nm wavelength) above 0.3, which is unprecedented for the site. Inversion of sky radiances provide the optical and microphysical properties of the smoke over Marambio. The AERONET data near the fire origin in Tumbarumba, Australia, was used to investigate the changes in the measured aerosol properties after transport and ageing. The analysis shows an increase in the fine mode particle radius and a reduction in absorption (increase in the single scattering albedo). The available long-term AOD data series at Marambio suggests that smoke particles could have remained over Antarctica for several weeks after the analyzed event.

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Extreme smoke event over the high Arctic

Cited by 12 publications

References 35 publications

Climatological‐Scale Analysis of Intensive and Semi‐intensive Aerosol Parameters Derived From AERONET Retrievals Over the Arctic

Climatological‐Scale Analysis of Intensive and Semi‐intensive Aerosol Parameters Derived From AERONET Retrievals Over the Arctic

Arctic spring and summertime aerosol optical depth baseline from long-term observations and model reanalyses, with implications for the impact of regional biomass burning processes

Characterization of Stratospheric Smoke Particles over the Antarctica by Remote Sensing Instruments

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