Columnar Optical and Radiative Properties of Aerosols in the Arctic Summer from Long-Term Aeronet Measurements DOI
Yuanxin Liang, Huizheng Che, Xindan Zhang

et al.

Published: Jan. 1, 2023

Aerosols as an external factor have important role in the amplification of Arctic warming, yet geography this harsh region has led to a paucity observations, which limited our understanding climate. We synthesized latest decade (2010–2021) data on microphysical–optical–radiative properties aerosols and their multi-component evolution during summer, taking into consideration biomass burning. Our results are based continuous observations from eight AERONET sites across region, together meteorological reanalysis dataset satellite fires, utilize back-trajectory model track source aerosols. The summer climatological characteristics within Circle showed that mainly fine-mode (fraction >0.95) with radius 0.15–0.20 μm, slight extinction coefficient (AOD440nm~ 0.11) moderate strong scattering (SSA440nm~ 0.95) dominant forward (ASY440nm~ 0.68). These optical result significant cooling at Earth’s surface (DARF-BOA ~ −13 W m−2) weak effect top atmosphere (DARF-TOA −5 m−2）. Further, we found is severely impacted by burning (BB) events July August, primarily occur central eastern Siberia followed subpolar North America. plumes BB transport westerly circulation, leading increase containing large amounts organic carbon. Absorptive carbonaceous also synergistically, could convert instantaneous direct aerosol radiative heating Earth–atmosphere system. This study provides insights complex sources loading emphasizes impacts increasingly frequent occurrence wildfire recent years.

Language: Английский

A review of the CAMx, CMAQ, WRF-Chem and NAQPMS models: Application, evaluation and uncertainty factors DOI

Gao Zhidong,

Xuehua Zhou

Environmental Pollution, Journal Year: 2023, Volume and Issue: 343, P. 123183 - 123183

Published: Dec. 16, 2023

Language: Английский

Citations

27
Unprecedented East Siberian wildfires intensify Arctic snow darkening through enhanced poleward transport of black carbon DOI
Yeonsoo Cho, Hyeonmin Kim, Rokjin J. Park

et al.

The Science of The Total Environment, Journal Year: 2025, Volume and Issue: 961, P. 178423 - 178423

Published: Jan. 1, 2025

Language: Английский

Citations

0
Decadal Trends and Drivers of Dust Emissions in East Asia: Integrating Statistical and SHAP-Based Interpretability Approaches DOI Creative Commons
Ziwei Yi, Yaqiang Wang, Zhaoliang Zeng

et al.

Remote Sensing, Journal Year: 2025, Volume and Issue: 17(7), P. 1313 - 1313

Published: April 7, 2025

Dust emissions significantly impact the radiation balance, ecosystems, human health, and global climate change through long-range transport. However, their spatiotemporal characteristics driving mechanisms in East Asia remain poorly understood. This study integrates multi-source reanalysis remote sensing data (1980–2023) to analyze dust across Asian source regions using statistical methods SHapley Additive exPlanations (SHAP) interpretability. The results show significant spatial seasonal variations, with peak occurring spring (March–May). Taklamakan Desert (S4) accounts for 38.1% of total is largest region. Meteorological factors are main drivers (49.4–68.8% contribution), while indices contribute least (2.9–8.0%). Wind speed most critical factor emissions, showing a positive correlation interacting 850 hPa geopotential height boundary layer height. vary regions. In Mongolia (S1), mainly influenced by wind atmospheric circulation, S4, near-surface meteorological conditions play dominant role. Tsaidam Basin Kumutage (S5), as well Badain Jaran, Tengger, Ulan Buh Deserts (S6), primarily driven height, circulation also playing certain Relative humidity shows negative S5 S6, snowmelt soil temperature have impacts on S4 S5. phases Arctic Oscillation North Atlantic enhance cold air activity speed, promoting S1 S6. quantifies offers scientific support improving models developing disaster mitigation strategies.

Language: Английский

Citations

0
Characterizing nighttime vertical profiles of atmospheric particulate matter and ozone in a megacity of south China using unmanned aerial vehicle measurements DOI
Zhanyong Wang,

Ruhui Cao,

Bai Li

et al.

Environmental Research, Journal Year: 2023, Volume and Issue: 236, P. 116854 - 116854

Published: Aug. 9, 2023

Language: Английский

Citations

9
Analysis of the gases emissions from volcanic activity in the East African rift using remote sensing during past two decades DOI

Sakine Moradi,

Elham Ghasemifar

Remote Sensing Applications Society and Environment, Journal Year: 2025, Volume and Issue: unknown, P. 101471 - 101471

Published: Feb. 1, 2025

Language: Английский

Citations

0
Precipitation-induced abrupt decrease of Siberian wildfire in summer 2022 under continued warming DOI Creative Commons
Yeonsoo Cho, Jin‐Ho Yoon, Jee‐Hoon Jeong

et al.

Environmental Research Letters, Journal Year: 2024, Volume and Issue: 19(7), P. 074037 - 074037

Published: June 7, 2024

Abstract Wildfires in Northeast (NE) Siberia have become more frequent owing to the warming climate, exerting a profound impact on global carbon cycle. While an increase temperature is recognized as primary driver of unprecedented wildfires, role precipitation during wildfire season relatively unexplored. Here, we present evidence that summer led sudden decrease NE Siberian especially 2022, notwithstanding persistent trend northern high latitudes. The interannual variability precipitation, linked large-scale atmospheric circulation, known Scandinavia (SCAND) pattern, significantly impacts regulation wildfires. Climate models project enhanced potentially amplifying year-to-year fluctuations occurrences. interplay between and patterns under ongoing may occurrence extreme leading substantial release further contributing climate warming.

Language: Английский

Citations

1
Columnar optical-radiative properties and components of aerosols in the Arctic summer from long-term AERONET measurements DOI
Yuanxin Liang, Huizheng Che, Xindan Zhang

et al.

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 912, P. 169052 - 169052

Published: Dec. 5, 2023

Language: Английский

Citations

1
From Polar Day to Polar Night: A Comprehensive Sun and Star Photometer Study of Trends in Arctic Aerosol Properties in Ny-Ålesund, Svalbard DOI Open Access
Sandra Graßl, Christoph Ritter,

Jonas Wilsch

et al.

Published: July 24, 2024

The origin and climate impact of Arctic aerosols, like the Haze, are not fully understood. Therefore, long-term aerosol observations in performed. In this study we present a homogenised data set from sun star photometer operated European Arctic, Ny-Ålesund, Svalbard, 2004 – 2023. Due to polar day night it is crucial use both instruments. Their evaluated same way follows cloud-screening procedure AERONET. Additionally, an improved method for calibration presented. We found out, that winter months generally more polluted have larger particles than summer. While monthly median Aerosol Optical Depth (AOD) decreases spring, AOD increases significantly autumn months. Haze characterised by large can be distinguished aerosols With autocorrelation analysis events usually occur with duration several hours therefore caused large-scale processes may periodicity days. Local neglected Ny-Ålesund but long-range transport plays major role budget. also compared processes, oscillation patterns, sea ice, weather conditions or wildfires on Northern Hemisphere did find one single cause, which clearly determines AOD.

Language: Английский

Citations

0
Large-ensemble Monte Carlo: a researcher’s guide to better climate trend uncertainties DOI Creative Commons

Zachary I Glaser,

Mark Richardson,

Felix W Landerer

et al.

Environmental Research Climate, Journal Year: 2024, Volume and Issue: 3(4), P. 045007 - 045007

Published: July 31, 2024

Abstract Internal climate variability (ICV) often violates the assumptions of statistical methods, and research community does not have an established approach for addressing resulting biases. Here we argue a technique call model Large-Ensemble Monte-Carlo (LENS-MC) to inform selection methods real-world application. Until now, scientists made best efforts select based on about mathematical properties ICV. LENS-MC relaxes these justifies method selection, potentially wide range analyses. We demonstrate using case study errors in 20 year trends global temperature top-of-atmosphere flux series, comparing results with standard ordinary least squares (OLS). OLS commonly underestimates trend uncertainties, higher likelihood falsely reporting statistically significant or changes trends, example p < 0.05 when statistics are actually equivalent 0.56. tests result that almost eliminate low bias errors. Using suggested researchers less likely mistakenly report could be widely applied analysis which output is available, provided ICV displays similar structure, such as autocorrelation, observed

Language: Английский

Citations

0
From Polar Day to Polar Night: A Comprehensive Sun and Star Photometer Study of Trends in Arctic Aerosol Properties in Ny-Ålesund, Svalbard DOI Creative Commons
Sandra Graßl, Christoph Ritter,

Jonas Wilsch

et al.

Remote Sensing, Journal Year: 2024, Volume and Issue: 16(19), P. 3725 - 3725

Published: Oct. 7, 2024

The climate impact of Arctic aerosols, like the Haze, and their origin are not fully understood. Therefore, long-term aerosol observations in performed. In this study, we present a homogenised data set from sun star photometer operated European Arctic, Ny-Ålesund, Svalbard, 20 years 2004–2023. Due to polar day night, it is crucial use both instruments. Their evaluated same way follows cloud-screening procedure AERONET. Additionally, an improved method for calibration presented. We found out, that autumn winter generally more polluted have larger particles than summer. While monthly median Aerosol Optical Depth (AOD) decreases spring, AOD increases significantly autumn. A clear signal large during Haze can be distinguished aerosols winter. With autocorrelation analysis, events usually occur with duration several hours. also compared large-scale processes, oscillation patterns, sea ice, weather conditions, or wildfires Northern Hemisphere but did find one single cause clearly determines AOD. Therefore observed optical depth superposition different sources.

Language: Английский

Citations

0