Transport and chemical transformation of anthropogenic and mineral aerosol in the marine boundary layer over the western North Pacific Ocean

Matsumoto, Kiyoshi; Uyama, Yukiko; Hayano, Teruaki; Uematsu, Mitsuo

doi:10.1029/2004jd004696

Cited by 29 publications

(20 citation statements)

References 24 publications

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“…By contrast, aerosol ammonium and non‐sea‐salt sulphate, which have gas phase precursors, are primarily associated with the fine mode aerosol (mean 75 and 73% fine mode respectively), while WSON and nss‐Ca 2+ both have on average about 45% of their concentration associated with the fine mode. This is similar to the proportions reported by [ Matsumoto et al ., ] for nss‐Ca 2+ in this region. WSON was reported to be predominantly associated with fine mode aerosol in samples collected in the NW Pacific using a 2.5 µm size cutoff between fine and coarse modes [ Nakamura et al ., ], while others report WSON to be split more or less equally between coarse and fine mode aerosol, in samples collected in Taiwan and over the Atlantic, respectively, for samples collected with a ~1 µm coarse/fine mode cutoff [ Chen et al ., ; Lesworth et al ., ].…”

Section: Resultsmentioning

confidence: 99%

“…[] probably reflecting differences in the magnitude of the impact of industrial emissions from Asian sources on samples of air masses with somewhat different trajectories over that region. Our results are consistent for this region with those from sampling on island stations in the NW Pacific such as Chichi‐jima [ Matsumoto et al ., ]. In our data, and in the other for this region [ Jung et al ., ], aerosol ammonium concentrations are higher than nitrate.…”

Section: Resultsmentioning

confidence: 99%

“…There have been numerous studies of atmospheric aerosol concentrations over the Pacific Ocean, particularly the North Pacific, including studies of dust and iron transport [ Uematsu et al ., ; Matsumoto et al ., ; Moffet et al ., , Prospero et al , , Wagener et al ., ], nitrogen [ Savoie et al ., ; Jung et al ., ; Nakamura et al ., ; Miyazaki et al ., ; Miyazaki et al ., ; Zhang et al ., ; Ooki et al ., ], as well as contaminants [ Uematsu et al ., ; Moffet et al ., ] but fewer studies of phosphorus [ Furutani et al ., ; Hsu et al ., ]. Together, these studies emphasize the general patterns of atmospheric transport over the Pacific (discussed further below) with high concentrations of dust (and associated iron), anthropogenically derived metals and nitrogen in the Asian plume passing over the NW Pacific, particularly in spring.…”

Section: Introductionmentioning

confidence: 97%

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Western Pacific atmospheric nutrient deposition fluxes, their impact on surface ocean productivity

Martino

Hamilton

Baker

et al. 2014

Global Biogeochemical Cycles

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The atmospheric deposition of both macronutrients and micronutrients plays an important role in driving primary productivity, particularly in the low-latitude ocean. We report aerosol major ion measurements for five ship-based sampling campaigns in the western Pacific from~25°N to 20°S and compare the results with those from Atlantic meridional transects (~50°N to 50°S) with aerosols collected and analyzed in the same laboratory, allowing full incomparability. We discuss sources of the main nutrient species (nitrogen (N), phosphorus (P), and iron (Fe)) in the aerosols and their stoichiometry. Striking north-south gradients are evident over both basins with the Northern Hemisphere more impacted by terrestrial dust sources and anthropogenic emissions and the North Atlantic apparently more impacted than the North Pacific. We estimate the atmospheric supply rates of these nutrients and the potential impact of the atmospheric deposition on the tropical western Pacific. Our results suggest that the atmospheric deposition is P deficient relative to the needs of the resident phytoplankton. These findings suggest that atmospheric supply of N, Fe, and P increases primary productivity utilizing some of the residual excess phosphorus (P*) in the surface waters to compensate for aerosol P deficiency. Regional primary productivity is further enhanced via the stimulation of nitrogen fixation fuelled by the residual atmospheric iron and P*. Our stoichiometric calculations reveal that a P* of 0.1 μmol L À1 can offset the P deficiency in atmospheric supply for many months. This study suggests that atmospheric deposition may sustain~10% of primary production in both the western tropical Pacific.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

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Western Pacific atmospheric nutrient deposition fluxes, their impact on surface ocean productivity

Martino

Hamilton

Baker

et al. 2014

Global Biogeochemical Cycles

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“…The magnitude of Cl-depletion of marine aerosols has been demonstrated to usually increase with decreasing sea salt particle size (Mouri and Okada 1993;Kerminen et al 1998;Yao et al 2003;Hsu et al 2007). This reaction produces sea salt particles coated with sulphate and nitrate over Asian and Pacific areas (Matsumoto et al 2004;Matsuki et al 2005;Yang et al 2009) and in the Mediterranean region (Tursic et al 2006). In the clean atmosphere, methanesulphonate is the major species involved in chloride depletion as observed in Finland (Kerminen et al 1998) and in the Arctic (Maskey et al 2011).…”

Section: Sea Saltmentioning

confidence: 99%

Ocean–Atmosphere Interactions of Particles

Leeuw

Guieu

Arneth

et al. 2013

Springer Earth System Sciences

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This chapter provides an overview of the current knowledge on aerosols in the marine atmosphere and the effects of aerosols on climate and on processes in the oceanic surface layer. Aerosol particles in the marine atmosphere originate predominantly from direct production at the sea surface due to the interaction between wind and waves (sea spray aerosol, or SSA) and indirect production by gas to particle conversion. These aerosols are supplemented by aerosols produced over the continents, as well as aerosols emitted by volcanoes and ship traffic, a large part of it being deposited to the ocean surface by dry and wet deposition. The SSA sources, chemical composition and ensuing physical and optical effects, are discussed. An overview is presented of continental sources and their ageing and mixing processes during transport. The current status of our knowledge on effects of marine aerosols on the Earth radiative balance, both direct by their interaction with solar radiation and indirect through their effects on cloud properties, is discussed. The deposition on the ocean surface of some key species, such as nutrients, their bioavailability and how they impact biogeochemical cycles are shown and discussed through different time and space scales approaches.

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“…In contrast, SO 2 emissions over China have been declining since 2006 because of the wide usage of flue-gas desulfurization (FGD) equipment in power plants (Lu et al, 2010(Lu et al, , 2011. All these East Asian pollutants along with soil dust are transported to the North Pacific via long-range atmospheric transport by westerly winds and perturb the remote marine background conditions and the ocean biogeochemistry by heterogeneous reactions Matsumoto et al, 2004). In addition to East Asian pollutants, the western North Pacific also receives biomass burning emissions from Southeast Asia (Tsay et al, 2016;Lin et al, 2013;Huang et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Long-term (2001–2012) trends of carbonaceous aerosols from a remote island in the western North Pacific: an outflow region of Asian pollutants

2018

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Abstract. The present study reports on long-term trends of carbonaceous aerosols in total suspended particulate (TSP) samples collected at Chichijima in the western North Pacific during [2001][2002][2003][2004][2005][2006][2007][2008][2009][2010][2011][2012]. Seasonal variations of elemental carbon (EC), organic carbon (OC), and water-soluble organic carbon (WSOC) concentrations showed maxima in winter to spring and minima in summer. These seasonal differences in the concentrations of carbonaceous aerosols were associated with the outflows of polluted air masses from East Asia, which are clearly distinguishable from pristine air masses from the central Pacific. The higher concentrations of carbonaceous aerosols during winter to spring are associated with long-range atmospheric transport of East Asian continental polluted air masses, whereas lower concentrations may be due to pristine air masses from the central Pacific in summer. The annual trends of OC / EC (+0.46 % yr −1 ), WSOC (+0.18 % yr −1 ) and WSOC / OC (+0.08 % yr −1 ) showed significant (p < 0.05) increases during the period of 2001-2012, suggesting that photochemical formation of WSOC and its contributions to secondary organic aerosols (SOAs) have increased over the western North Pacific via long-range atmospheric transport. We found a significant increase (+0.33 % yr −1 ) in nss-K + / EC ratios, demonstrating that concentrations of biomass-burning-derived carbonaceous aerosols have increased, while those of primary fossilfuel-derived aerosols have decreased over the western North Pacific. Further, secondary biogenic emissions are also important over the western North Pacific as inferred from a significant increase (+0.14 % yr −1 ) in the concentrations of methanesulfonate (MSA − , a tracer for biogenic sources). This point was further supported by a moderate correlation (r = 0.40) between WSOC and MSA − . We also found a significant increase in OC / TC (total carbon) and WSOC / TC ratios, further suggesting that photochemical formation of WSOC and its contributions to SOAs have increased over the western North Pacific during 2001-2012 via long-range atmospheric transport from East Asia.

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Transport and chemical transformation of anthropogenic and mineral aerosol in the marine boundary layer over the western North Pacific Ocean

Cited by 29 publications

References 24 publications

Western Pacific atmospheric nutrient deposition fluxes, their impact on surface ocean productivity

Western Pacific atmospheric nutrient deposition fluxes, their impact on surface ocean productivity

Ocean–Atmosphere Interactions of Particles

Long-term (2001–2012) trends of carbonaceous aerosols from a remote island in the western North Pacific: an outflow region of Asian pollutants

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