The Use of Size Distributions of Spheroidal Carbonaceous Particles in Swimming Pool Deposits for Evaluating Atmospheric Particle Behaviour

Inoue, Jun; Tomozawa, Arisa; Okudaira, Takamoto

doi:10.1007/s11270-013-1580-7

Cited by 9 publications

(5 citation statements)

References 20 publications

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“…Most SCPs fell in the 4–10 µm size range, but some SCPs in slightly larger fractions occurred throughout ( Figure 7 , Supplemental 10 ). No SCPs >50 µm were observed, suggesting that a nearby source of SCPs is less likely ( Inoue et al, 2013 ). Searsville Lake is not downwind of any local coal-burning power stations, suggesting that the deposition of the SCPs is a regional, not local, signature.…”

Section: Resultsmentioning

confidence: 99%

The Searsville Lake Site (California, USA) as a candidate Global boundary Stratotype Section and Point for the Anthropocene series

Stegner

Hadly

Barnosky

et al. 2023

The Anthropocene Review

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Cores from Searsville Lake within Stanford University’s Jasper Ridge Biological Preserve, California, USA, are examined to identify a potential GSSP for the Anthropocene: core JRBP2018-VC01B (944.5 cm-long) and tightly correlated JRBP2018-VC01A (852.5 cm-long). Spanning from 1900 CE ± 3 years to 2018 CE, a secure chronology resolved to the sub-annual level allows detailed exploration of the Holocene-Anthropocene transition. We identify the primary GSSP marker as first appearance of 239,240Pu (372–374 cm) in JRBP2018-VC01B and designate the GSSP depth as the distinct boundary between wet and dry season at 366 cm (6 cm above the first sample containing 239,240Pu) and corresponding to October-December 1948 CE. This is consistent with a lag of 1–2 years between ejection of 239,240Pu into the atmosphere and deposition. Auxiliary markers include: first appearance of 137Cs in 1958; late 20th-century decreases in δ15N; late 20th-century elevation in SCPs, Hg, Pb, and other heavy metals; and changes in abundance and presence of ostracod, algae, rotifer, and protozoan microfossils. Fossil pollen document anthropogenic landscape changes related to logging and agriculture. As part of a major university, the Searsville site has long been used for research and education, serves users locally to internationally, and is protected yet accessible for future studies and communication about the Anthropocene. Plain Word Summary The Global Boundary Stratotype Section and Point (GSSP) for the proposed Anthropocene Series/Epoch is suggested to lie in sediments accumulated over the last ~120 years in Searsville Lake, Woodside, California, USA. The site fulfills all of the ideal criteria for defining and placing a GSSP. In addition, the Searsville site is particularly appropriate to mark the onset of the Anthropocene, because it was anthropogenic activities–the damming of a watershed–that created a geologic record that now preserves the very signals that can be used to recognize the Anthropocene worldwide.

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Section: Resultsmentioning

confidence: 99%

The Searsville Lake Site (California, USA) as a candidate Global boundary Stratotype Section and Point for the Anthropocene series

Stegner

Hadly

Barnosky

et al. 2023

The Anthropocene Review

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“…Studies on current SCP deposition in industrial areas show that a relationship exists between the size of SCPs and their spatial distribution from the emission source (Larsen, 2003). Inoue et al (2013) stressed that concentrations of SCP !20-mm representing more than 40% of the total SCP are locally generated within a few kilometers. Even though SCP !25-mm at Dune Pond do not reach those percentages, their increase up to 26% of the total SCP counts may well indicate a closer source related to the beginning and rise of the oil industry in the CACR at that time (Fig.…”

Section: Scp Results and Datesmentioning

confidence: 99%

“…SCP were identified and tallied using a light microscope at 400Â magnification. SCPs !25-mm were counted separately in order to account for a more local signal (Inoue et al, 2013). Lycopodium spore tablets were added in order to calculate SCP concentration.…”

Section: Scp Analysismentioning

confidence: 99%

Prehistoric fires and the shaping of colonial transported landscapes in southern California: A paleoenvironmental study at Dune Pond, Santa Barbara County

Ejarque

Anderson

Simms

et al. 2015

Quaternary Science Reviews

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“…In contrast, SKP exhibits a coarsening of the magnetic signal in post-1997 sediments (Figure 8). This potentially highlights a recent, localised effect of pollution captured by SKP as urban expansion has occurred over time, since the size of particle deposition increases with proximity to pollution source (Inoue et al, 2013). Furthermore, increased coal combustion from Chongqing and Luohuang Power Stations are likely sources of coarse magnetic grains (Locke and Bertine, 1986).…”

Section: Characterisation (Supplementarymentioning

confidence: 97%

Monitoring Impacts of Urbanisation and Industrialisation on Air Quality in the Anthropocene Using Urban Pond Sediments

et al. 2018

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The Use of Size Distributions of Spheroidal Carbonaceous Particles in Swimming Pool Deposits for Evaluating Atmospheric Particle Behaviour

Cited by 9 publications

References 20 publications

The Searsville Lake Site (California, USA) as a candidate Global boundary Stratotype Section and Point for the Anthropocene series

The Searsville Lake Site (California, USA) as a candidate Global boundary Stratotype Section and Point for the Anthropocene series

Prehistoric fires and the shaping of colonial transported landscapes in southern California: A paleoenvironmental study at Dune Pond, Santa Barbara County

Monitoring Impacts of Urbanisation and Industrialisation on Air Quality in the Anthropocene Using Urban Pond Sediments

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