Return of naturally sourced Pb to Atlantic surface waters.
Return of naturally sourced Pb to Atlantic surface waters.
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DOI：
10.1038/ncomms12921
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发表时间：
2016-09-28
影响因子：
16.6
通讯作者：
de Baar, Hein J. W.
中科院分区：
文献类型：
--
作者：
Bridgestock, Luke;van de Flierdt, Tina;Rehkamper, Mark;Paul, Maxence;Middag, Rob;Milne, Angela;Lohan, Maeve C.;Baker, Alex R.;Chance, Rosie;Khondoker, Roulin;Strekopytov, Stanislav;Humphreys-Williams, Emma;Achterberg, Eric P.;Rijkenberg, Micha J. A.;Gerringa, Loes J. A.;de Baar, Hein J. W.
在过去的世纪，人为排放完全压倒了天然海洋铅（Pb）源，主要是由于含铅汽油的使用。在这里，铅同位素测量的基础上，我们重新评估的重要性，自然和人为的铅来源的热带北大西洋后，几乎完全停止全球含铅汽油的使用。在大西洋表层沃茨中观察到的来自矿物粉尘的天然铅的比例高达30-50%，这反映了全球减少人为铅排放的努力取得了成功。矿物粉尘衍生的铅在地表沃茨的观测是由大气矿物粉尘浓度升高的北非尘羽和大气气溶胶通量到地表沃茨的干沉降的优势。鉴于这些具体的区域条件，即使在没有含铅汽油燃烧的情况下，人类活动的排放仍将是全球海洋铅的主要来源。 世纪以来，人类活动产生的铅（Pb）已经超过了自然铅的来源，但在21世纪初逐步淘汰含铅汽油又重新燃起了希望。在这里，Bridgestock等人使用Pd同位素重新评估了沉积在热带北大西洋的Pd的来源，并揭示了一个重要的自然来源。
Anthropogenic emissions completely overwhelmed natural marine lead (Pb) sources during the past century, predominantly due to leaded petrol usage. Here, based on Pb isotope measurements, we reassess the importance of natural and anthropogenic Pb sources to the tropical North Atlantic following the nearly complete global cessation of leaded petrol use. Significant proportions of up to 30–50% of natural Pb, derived from mineral dust, are observed in Atlantic surface waters, reflecting the success of the global effort to reduce anthropogenic Pb emissions. The observation of mineral dust derived Pb in surface waters is governed by the elevated atmospheric mineral dust concentration of the North African dust plume and the dominance of dry deposition for the atmospheric aerosol flux to surface waters. Given these specific regional conditions, emissions from anthropogenic activities will remain the dominant global marine Pb source, even in the absence of leaded petrol combustion. Anthropogenic lead (Pb) has overwhelmed natural Pb sources for over a century, yet the phasing out of leaded petrol in the early 2000s has renewed hope. Here, Bridgestock et al. use Pd isotopes to reassess the origins of Pd deposited in the tropical North Atlantic and reveal a significant natural source.
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影响因子：
5
作者：
Bollhöfer, A;Rosman, KJR
通讯作者：
Rosman, KJR
影响因子：
3
作者：
Chester, R;Nimmo, M;Preston, MR
通讯作者：
Preston, MR
影响因子：
4.4
作者：
Arimoto, R;Ray, BJ;Duce, RA
通讯作者：
Duce, RA
DOI：
10.1016/s0967-0645(01)00019-4
发表时间：
2001-01-01
影响因子：
3
作者：
Alleman, LY;Church, TM;Flegal, AR
通讯作者：
Flegal, AR
影响因子：
5.3
作者：
BACON, MP;SPENCER, DW;BREWER, PG
通讯作者：
BREWER, PG