Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019GL084180 |
Physical Weathering Intensity Controls Bioavailable Primary Iron(II) Silicate Content in Major Global Dust Sources | |
Shoenfelt, Elizabeth M.1,2,3; Winckler, Gisela1,2; Annett, Amber L.4; Hendry, Katharine R.5; Bostick, Benjamin C.2 | |
2019-10-10 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | USA; England |
英文摘要 | The speciation of iron (Fe) reaching the ocean, for instance in wind-blown dust and coastal sediments, impacts its bioavailability to phytoplankton and its impact on atmospheric carbon dioxide (CO2) and climate. For dust reaching the Southern Ocean, primary Fe(II) silicates that are physically weathered from bedrock are highly bioavailable compared to more chemically weathered, Fe(III)-rich species, suggesting that weathering in dust source regions impacts the bioavailable Fe supply. However, this phenomenon has not been studied in other important terrestrial Fe sources, where weathering regimes and source geology vary. Here, we use Fe X-ray absorption spectroscopy on marine sediment cores to show that major global dust and sediment sources impacted by high physical weathering contain abundant primary minerals and thus are overlooked as a source of highly bioavailable Fe globally. Thus, it is important to consider the role of physical versus chemical weathering in Fe fertilization and biotic CO2 cycling. |
英文关键词 | dust iron physical weathering bioavailability mineralogy carbon cycle |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000489484900001 |
WOS关键词 | LOESS DEPOSITS ; MINERAL DUST ; EVOLUTION ; SOLUBILITY ; ATMOSPHERE ; SPECIATION ; IMPACTS ; EROSION ; CLIMATE ; OCEAN |
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/187613 |
专题 | 气候变化 |
作者单位 | 1.Columbia Univ, Dept Earth & Environm Sci, New York, NY 10027 USA; 2.Lamont Doherty Earth Observ, Palisades, NY 10964 USA; 3.MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA; 4.Univ Southampton, Sch Ocean & Earth Sci, Southampton, Hants, England; 5.Univ Bristol, Sch Earth Sci, Bristol, Avon, England |
推荐引用方式 GB/T 7714 | Shoenfelt, Elizabeth M.,Winckler, Gisela,Annett, Amber L.,et al. Physical Weathering Intensity Controls Bioavailable Primary Iron(II) Silicate Content in Major Global Dust Sources[J]. GEOPHYSICAL RESEARCH LETTERS,2019. |
APA | Shoenfelt, Elizabeth M.,Winckler, Gisela,Annett, Amber L.,Hendry, Katharine R.,&Bostick, Benjamin C..(2019).Physical Weathering Intensity Controls Bioavailable Primary Iron(II) Silicate Content in Major Global Dust Sources.GEOPHYSICAL RESEARCH LETTERS. |
MLA | Shoenfelt, Elizabeth M.,et al."Physical Weathering Intensity Controls Bioavailable Primary Iron(II) Silicate Content in Major Global Dust Sources".GEOPHYSICAL RESEARCH LETTERS (2019). |
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