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DOI | 10.1038/s41561-018-0078-8 |
A vegetation control on seasonal variations in global atmospheric mercury concentrations | |
Jiskra, Martin1,2; Sonke, Jeroen E.1; Obrist, Daniel3; Bieser, Johannes4; Ebinghaus, Ralf4; Myhre, Cathrine Lund5; Pfaffhuber, Katrine Aspmo5; Wangberg, Ingvar6; Kyllonen, Katriina7; Worthy, Doug8; Martin, Lynwill G.9; Labuschagne, Casper9; Mkololo, Thumeka9; Ramonet, Michel10; Magand, Olivier11; Dommergue, Aurelien11 | |
2018-04-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2018 |
卷号 | 11期号:4页码:244-+ |
文章类型 | Article |
语种 | 英语 |
国家 | France; Switzerland; USA; Germany; Norway; Sweden; Finland; Canada; South Africa |
英文摘要 | Anthropogenic mercury emissions are transported through the atmosphere as gaseous elemental mercury (Hg(0)) before they are deposited to Earth's surface. Strong seasonality in atmospheric Hg(0) concentrations in the Northern Hemisphere has been explained by two factors: anthropogenic Hg(0) emissions are thought to peak in winter due to higher energy consumption, and atmospheric oxidation rates of Hg(0) are faster in summer. Oxidation-driven Hg(0) seasonality should be equally pronounced in the Southern Hemisphere, which is inconsistent with observations of constant year-round Hg(0) levels. Here, we assess the role of Hg(0) uptake by vegetation as an alternative mechanism for driving Hg(0) seasonality. We find that at terrestrial sites in the Northern Hemisphere, Hg(0) co-varies with CO2, which is known to exhibit a minimum in summer when CO2 is assimilated by vegetation. The amplitude of seasonal oscillations in the atmospheric Hg(0) concentration increases with latitude and is larger at inland terrestrial sites than coastal sites. Using satellite data, we find that the photosynthetic activity of vegetation correlates with Hg(0) levels at individual sites and across continents. We suggest that terrestrial vegetation acts as a global Hg(0) pump, which can contribute to seasonal variations of atmospheric Hg(0), and that decreasing Hg(0) levels in the Northern Hemisphere over the past 20 years can be partly attributed to increased terrestrial net primary production. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000429131600015 |
WOS关键词 | TOTAL GASEOUS MERCURY ; ELEMENTAL MERCURY ; DIURNAL-VARIATIONS ; CARBONYL SULFIDE ; FOREST CANOPY ; EMISSIONS ; FLUXES ; CHINA ; DEPOSITION ; EXCHANGE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/34864 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Univ Toulouse, Inst Rech Dev, CNRS, Geosci Environm Toulouse, Toulouse, France; 2.Univ Basel, Environm Geosci, Basel, Switzerland; 3.Univ Massachusetts, Dept Environm Earth & Atmospher Sci, Lowell, MA USA; 4.Helmholtz Zentrum Geesthacht, Inst Coastal Res, Geesthacht, Germany; 5.Norwegian Inst Air Res, Kjeller, Norway; 6.Swedish Environm Res Inst, Gothenburg, Sweden; 7.Finnish Meteorol Inst, Atmospher Composit Res Unit, Helsinki, Finland; 8.Environm & Climate Change Canada, Climate Res Div, Toronto, ON, Canada; 9.South African Weather Serv, Cape Point Global Atmosphere Watch Stn, Stellenbosch, South Africa; 10.Univ Paris Saclay, Lab Sci Climat & Environm, Inst Pierre Simon Laplace,CNRS, Univ Versailles St Quentin En Yvelines,Commissari, Gif Sur Yvette, France; 11.Univ Grenoble Alpes, CNRS, Inst Geosci Environm, Inst Rech Dev, Grenoble, France |
推荐引用方式 GB/T 7714 | Jiskra, Martin,Sonke, Jeroen E.,Obrist, Daniel,et al. A vegetation control on seasonal variations in global atmospheric mercury concentrations[J]. NATURE GEOSCIENCE,2018,11(4):244-+. |
APA | Jiskra, Martin.,Sonke, Jeroen E..,Obrist, Daniel.,Bieser, Johannes.,Ebinghaus, Ralf.,...&Dommergue, Aurelien.(2018).A vegetation control on seasonal variations in global atmospheric mercury concentrations.NATURE GEOSCIENCE,11(4),244-+. |
MLA | Jiskra, Martin,et al."A vegetation control on seasonal variations in global atmospheric mercury concentrations".NATURE GEOSCIENCE 11.4(2018):244-+. |
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