Use of a new database of lead 210 for global aerosol model validation

Preiss, Nicolas; Genthon, Christophe

doi:10.1029/97jd01389

Cited by 28 publications

(24 citation statements)

References 12 publications

(5 reference statements)

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“…This range of measurements is consistent with the global compilation data of 210 Pb depositional fluxes in the northern hemisphere, where the reported 210 Pb annual depositional rate on continents between 10°and 30°N latitude was about 160 Bq m -2[21,22]. The highest 210 Pb concentrations were observed in April each year and lowest in October-November.…”

supporting

confidence: 77%

Depositional characteristics of 7Be and 210Pb in Kuwaiti dust

Aba

Al-Dousari

Ismaeel

2015

J Radioanal Nucl Chem

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Dust fallout fluxes of 210 Pb and 7 Be were measured in Kuwait during October 2009-August 2011. The annual average depositional fluxes of 210 Pb and 7 Be were 134 and 422 Bq m -2 , respectively. The temporal variations of both radionuclides showed a maximum deposition during April of 2010 and 2011.A strong linear relationship between 7 Be and 210 Pb was found. The average dust depositional rate was about 50 mg m -2 h -1 with a maximum of 460 mg m -2 h -1 , while the extreme value of 664 mg m -2 h -1 was recorded in March 2011 when a massive dust storm hit Kuwait. The 210 Pb deposition has a strong correlation with dust deposition because of its terrestrial abundance. Whereas the 7 Be a radionuclide shows a weaker correlation with dust deposition.

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supporting

confidence: 77%

Depositional characteristics of 7Be and 210Pb in Kuwaiti dust

Aba

Al-Dousari

Ismaeel

2015

J Radioanal Nucl Chem

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“…These deposition rates are based on the estimated 222 Rn emanation rates from the continents, atmospheric circulation rates and aerosol mean residence times in the mid-northern hemisphere. This trend is generally supported by measurements (Benninger, 1978;Turekian et al, 1983;Hartman, 1987;Todd et al, 1989;Preiss and Genthon, 1997;Kim et al, 1999;Renfro et al, 2013;Lozano et al, 2013) and the general distribution of 210 Pb activity in aerosol in the Northern hemisphere (Baskaran, 2011). Note that seasonally higher depositions are also expected close to the eastern coast due to aerosol inputs from African (i.e., Saharan dust) and European air masses (Lozano et al, 2013).…”

Section: Pb Cycling In the Surface Oceanmentioning

confidence: 68%

210Po and 210Pb distribution, dissolved-particulate exchange rates, and particulate export along the North Atlantic US GEOTRACES GA03 section

Rigaud

Stewart

Baskaran

et al. 2015

Deep Sea Research Part II: Topical Studies in Oceanography

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North Atlantic OceanHydrothermal plume Benthic nepheloid layer GEOTRACES a b s t r a c t Vertical profiles of 210 Po and 210 Pb in the water column were measured in the dissolved phase ( o0.45 mm), and small (0.8-51 mm) and large (4 51 mm) particles at seven stations along the US GEOTRACES North Atlantic Zonal Transect (GA03). Mass balance calculations were employed to assess nuclide exchange rates at the dissolved-small particle interface and between small and large particles, and to quantify export with settling large particles. In the surface ocean, 210 Po scavenging is linearly correlated with the concentration of particulate organic carbon (POC) in large particles, supporting the role of biogenic particle in 210 Po bioaccumulation and export. In stations near the coast, this link is more complex due to the variable source of biogenic material and temporal changes in the surface biogeochemical and physical conditions. At depth, 210 Po exhibits significant widespread deficit with respect to 210 Pb that could in part be attributed to in situ 210 Po scavenging and may be related to surface biological productivity. As previously reported the 210 Pb scavenging rates in the surface ocean were higher at ocean margins. At depth, 210 Pb scavenging increases with depth and eastward due to the increase of adsorption sites available in the benthic layers and to a regional contribution of benthic 210 Pb scavenging and/or particle flux, respectively. The benthic nepheloid layer (BNL) and the Hydrothermal TAG plume distinctly enhance 210 Pb scavenging due to increased surface adsorption in association with resuspended or freshly formed particles. In contrast, 210 Po is not seen to be significantly scavenged in these environments due to its relatively short half-life and the long residence time of particles.

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“…7). Most of the data for this plot is taken from Preiss and Genthon (1997). Only data from continents, coastal oceans and ice cores/ sheets are included in plotting this figure.…”

Section: Depositional Fluxes Of 210 Po and 210 Pbmentioning

confidence: 99%

“…McNeary and Baskaran (2003) proposed that only a small portion of the aerosols scavenges effectively 210 Pb from the atmosphere and a major portion of the aerosols do not actively Table 1. Majority of the data is taken from the compiled data set by Preiss and Genthon (1997).…”

Section: Depositional Velocities Of Aerosolsmentioning

confidence: 99%