A comprehensive global dataset of atmospheric <sup>7</sup>Be and <sup>210</sup>Pb measurements: air concentration and depositional flux

Abstract

Abstract. 7Be and 210Pb air concentration and depositional flux data provide key information on the origins and movements of air masses, as well as deposition processes and residence time of aerosols. After their deposition onto the Earth's surface, they are utilized for tracing soil redistribution processes on land and particle dynamics and mixing processes in the ocean. Here we present a global dataset of air concentration and depositional flux measurements of atmospheric 7Be and 210Pb made by a large number of researchers and laboratories. Data were collected from published papers between 1955 and early 2020. It includes the annual surface air concentrations data of 7Be from 367 sites and of 210Pb from 270 sites, the annual depositional flux of 7Be from 279 sites, and of 210Pb from 602 sites. When available, appropriate metadata have also been summarized, including geographic location, sampling date, methodology, annual precipitation, and references. The dataset is available at https://doi.org/10.5281/zenodo.4521649 (Zhang et al., 2021). The purpose of this paper is to have the published data available in one place for future researchers' public consumption in their research and provide an overview of the scope and nature of this dataset holdings.

Aerosol Populations, Processes, and Ages in Bulk Deposition: Insights From a 9‐Year Study of 7Be, 210Pb, Sulfate, and Major/Trace Elements

“…Several excellent reviews of global 7 Be and 210 Pb deposition data have appeared in recent years (Du et al., 2015; Mohan et al., 2019; F. Zhang et al., 2021). None have analyzed 7 Be: 210 Pb ratios in detail, however, so we compiled sources from F. Zhang et al.…”

“…[2019], and F. Zhang et al. [2021]). Compiled global data reveal systematic variations in 7 Be: 210 Pb depositional ratios by latitude, longitude, under different meteorological conditions, airmass sources, and changing seasons (Du et al., 2015; Dueñas et al., 2017; Huh et al., 2006; H. N. Lee et al., 2007; Lozano et al., 2011; McNeary & Baskaran, 2003; Mohan et al., 2019; Olsen et al., 1985; Renfro et al., 2013).…”

A global dataset of atmospheric <sup>7</sup>Be and <sup>210</sup>Pb measurements: annual air concentration and depositional flux

“…In such models, the atmospheric depositional input of 7 Be and 210 Pb is a required source term. Furthermore, the 7 Be / 210 Pb ex activity ratio can be used to identify the source area of sediments (Whiting et al, 2005;Jweda et al, 2008;Wang et al, 2021), to quantify the age of sediments (Matisoff et al, 2005;Saari et al, 2010), and to determine the transport distance of suspended particles (Bonniwell et al, 1999;Matisoff et al, 2002). Thus, the atmospheric depositional flux data of 7 Be and 210 Pb are also important for tracing particle dynamics in aquatic systems.…”

“…In addition, the data of the 7 Be / 210 Pb air concentration ratio, 7 Be / 210 Pb depositional flux ratio, and deposition velocities for 7 Be and 210 Pb are also presented. The dataset can be downloaded from Zenodo (https://doi.org/10.5281/zenodo.4785136, Zhang et al, 2021). It is free for scientific applications, but the free availability does not constitute a license to reproduce or publish it.…”

“…When available, appropriate metadata have also been summarized, including geographic location, sampling date, methodology, annual precipitation, and references. The dataset is archived at https://doi.org/10.5281/zenodo.4785136 (Zhang et al, 2021) and is freely available for the scientific community. The purpose of this paper is to provide an overview of the scope and nature of this dataset and its potential utility as baseline data for future research.…”