scholarly journals Long-range transport of anthropogenic aerosols to the National Oceanic and Atmospheric Administration baseline station at Mauna Loa Observatory, Hawaii

1999 ◽  
Vol 104 (D15) ◽  
pp. 18521-18533 ◽  
Author(s):  
Kevin D. Perry ◽  
Thomas A. Cahill ◽  
Russell C. Schnell ◽  
Joyce M. Harris
Keyword(s):  
Long Range ◽  
Long Range Transport ◽  
Anthropogenic Aerosols ◽  
Mauna Loa ◽  
Range Transport

Aerosol optical properties at Mauna Loa Observatory: Long-range transport from Kuwait?

1992 ◽  
Vol 19 (6) ◽  
pp. 581-584 ◽  
Author(s):  
B. A. Bodhaine ◽  
J. M. Harris ◽  
J. A. Ogren ◽  
D. J. Hofmann
Keyword(s):  
Optical Properties ◽  
Long Range ◽  
Long Range Transport ◽  
Aerosol Optical Properties ◽  
Mauna Loa ◽  
Range Transport

Variations in atmospheric methane at Mauna Loa Observatory related to long-range transport

1992 ◽  
Vol 97 (D5) ◽  
pp. 6003 ◽  
Author(s):  
Joyce M. Harris ◽  
Pieter P. Tans ◽  
Edward J. Dlugokencky ◽  
Kenneth A. Masarie ◽  
Patricia M. Lang ◽  
...  
Keyword(s):  
Long Range ◽  
Long Range Transport ◽  
Atmospheric Methane ◽  
Mauna Loa ◽  
Range Transport

scholarly journals Long-range transport of anthropogenic air pollutants into the marine air: insight into fine particle transport and chloride depletion on sea salts

2021 ◽  
Vol 21 (23) ◽  
pp. 17715-17726
Author(s):  
Liang Xu ◽  
Xiaohuan Liu ◽  
Huiwang Gao ◽  
Xiaohong Yao ◽  
Daizhou Zhang ◽  
...  
Keyword(s):  
East Asia ◽  
Long Range ◽  
Air Pollutants ◽  
Radiative Forcing ◽  
Eastern China ◽  
Long Range Transport ◽  
Anthropogenic Aerosols ◽  
Range Transport ◽  
Anthropogenic Air Pollutants ◽  
Marine Air

Abstract. Long-range transport of anthropogenic air pollutants from East Asia can affect the downwind marine air quality during spring and winter. Long-range transport of continental air pollutants and their interaction with sea salt aerosol (SSA) significantly modify the radiative forcing of marine aerosols and influence ocean biogeochemical cycling. Previous studies poorly characterize variations of aerosol particles along with air mass transport from the continental edge to the remote ocean. Here, the research ship R/V Dongfanghong 2 traveled from the eastern China seas (ECS) to the northwestern Pacific Ocean (NWPO) to understand what and how air pollutants were transported from the highly polluted continental air to clean marine air in spring. A transmission electron microscope (TEM) was used to find the long-range transported anthropogenic particles and the possible Cl-depletion phenomenon of SSA in marine air. Anthropogenic aerosols (e.g., sulfur (S)-rich, S-soot, S-metal/fly ash, organic matter (OM)-S, and OM coating particles) were identified and dramatically declined from 87 % to 8 % by number from the ECS to remote NWPO. For the SSA aging, 87 % of SSA particles in the ECS were identified as fully aged, while the proportion of fully aged SSA particles in the NWPO decreased to 29 %. Our results highlight that anthropogenic acidic gases in the troposphere (e.g., SO2, NOx, and volatile organic compounds) could be transported to remote marine air and exert a significant impact on aging of SSA particles in the NWPO. The study shows that anthropogenic particles and gases from East Asia significantly perturb different aerosol chemistry from coastal to remote marine air. More attention should be given to the modification of SSA particles in remote marine areas due to the influence of anthropogenic gaseous pollutants.

scholarly journals Long-range transport of anthropogenic air pollutants into the marine air: Insight into fine particle transport and chloride depletion on sea salts

2021 ◽  
Author(s):  
Liang Xu ◽  
Xiaohuan Liu ◽  
Huiwang Gao ◽  
Xiaohong Yao ◽  
Daizhou Zhang ◽  
...  
Keyword(s):  
East Asia ◽  
Long Range ◽  
Air Pollutants ◽  
Eastern China ◽  
Long Range Transport ◽  
Marine Aerosols ◽  
Anthropogenic Aerosols ◽  
Range Transport ◽  
Anthropogenic Air Pollutants ◽  
Marine Air

Abstract. Long-range transport of anthropogenic air pollutants from East Asia can affect the downwind marine air quality during spring and winter. Long-range transport of continental air pollutants and their interaction with sea salt aerosols (SSA) significantly modify the radiative forcing of marine aerosols and influence ocean biogeochemical cycling. Previous studies poorly characterize variations of aerosol particles along with air mass transport from the continental edge to the remote ocean. Here, the research ship R/V Dongfanghong 2 traveled from the eastern China seas (ECS) to the northwestern Pacific Ocean (NWPO) to understand what and how air pollutants were transported from the highly polluted continental air to clean marine air in spring. A transmission electron microscope (TEM) was used to find the long-range transported anthropogenic particles and the possible Cl-depletion phenomenon of SSA in marine air. Primary and secondary anthropogenic aerosols were identified and dramatically declined from 87 % to 8 % by number from the ECS to remote NWPO. For the SSA aging, 86 % of SSA particles in the ECS were identified as fully aged, while the proportion of fully aged SSA particles in the NWPO decreased to 31 %. The result highlights that anthropogenic acidic gases in the troposphere (e.g., SO2, NOx, and volatile organic compounds) were transported longer distances compared to the anthropogenic aerosol and could exert a significant impact on marine aerosols in the NWPO. These results show that anthropogenic particles and gases from East Asia significantly perturb aerosol chemistry in marine air. The optical properties and cloud condensation nucleation of the modified SSA particles should be incorporated into the more accurately modeling of clouds in the ECS and NWPO in spring and winter.

scholarly journals Modeling study of long-range transport of Asian dust and anthropogenic aerosols from East Asia

2002 ◽  
Vol 29 (24) ◽  
pp. 11-1-11-4 ◽  
Author(s):  
Toshihiko Takemura ◽  
Itsushi Uno ◽  
Teruyuki Nakajima ◽  
Akiko Higurashi ◽  
Itaru Sano
Keyword(s):  
East Asia ◽  
Long Range ◽  
Asian Dust ◽  
Long Range Transport ◽  
Anthropogenic Aerosols ◽  
Range Transport ◽  
Modeling Study

scholarly journals Scattering and absorption properties of near-surface aerosol over Gangetic–Himalayan region: the role of boundary layer dynamics and long-range transport

2014 ◽  
Vol 14 (15) ◽  
pp. 21101-21148 ◽  
Author(s):  
U. C. Dumka ◽  
D. G. Kaskaoutis ◽  
M. K. Srivastava ◽  
P. C. S. Devara
Keyword(s):  
Boundary Layer ◽  
Long Range ◽  
Long Range Transport ◽  
Monsoon Circulation ◽  
Anthropogenic Aerosols ◽  
Absorption Properties ◽  
Near Surface ◽  
Range Transport ◽  
Boundary Layer Dynamics

Abstract. Knowledge of light scattering and absorption properties of atmospheric aerosols is of vital importance in evaluating their types, sources and radiative forcing. This is of particular interest over the Gangetic–Himalayan (GH) region due to large aerosol loading over the plains and the uplift over the Himalayan range causing serious effects on atmospheric heating, glaciology and monsoon circulation. In this respect, Ganges Valley Aerosol Experiment (GVAX) was initiated over the region aiming to examine the aerosol properties, source regions, uplift mechanisms and aerosol-cloud interactions. The present study examines the temporal (monthly, seasonal) evolution of scattering (σsp) and absorption (σap) coefficients, their wavelength dependence, and the role of the Indo-Gangetic plains (IGP), boundary-layer dynamics (BLD) and long-range transport (LRT) in the aerosol uplift over the Himalayas. The measurements are performed at the elevated site Nainital via the Atmospheric Radiation Measurement Mobile Facility including several instruments (Nephelometer, Particle Soot Absorption Photometer, etc.) during June 2011 to March 2012. The σsp and σap exhibit a pronounced seasonal variation with monsoon low and post-monsoon (November) high, while the scattering wavelength exponent exhibits higher values during monsoon, in contrast to the absorption Ångström exponent which maximizes in December–March. The analysis is performed separately for particles bellow 10 and 1μm in diameter in order to examine the influence of the particle size on optical properties. The elevated-background measuring site provides the advantage of examining the LRT of natural and anthropogenic aerosols from the IGP and southwest Asia and the role of BLD in the aerosol lifting processes, while the aerosols are found to be well-mixed and aged-type dominant.

Elemental carbon deposition to Svalbard snow from Norwegian settlements and long-range transport

Tellus B ◽  
2011 ◽  
Vol 63 (3) ◽  
Author(s):  
Borgar Aamaas ◽  
Carl Egede Bøggild ◽  
Frode Stordal ◽  
Terje Berntsen ◽  
Kim Holmén ◽  
...  
Keyword(s):  
Long Range ◽  
Elemental Carbon ◽  
Carbon Deposition ◽  
Long Range Transport ◽  
Range Transport
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