DOI: 10.1002/2015GL064250
论文题名: Dust fluxes and iron fertilization in Holocene and Last Glacial Maximum climates
作者: Lambert F. ; Tagliabue A. ; Shaffer G. ; Lamy F. ; Winckler G. ; Farias L. ; Gallardo L. ; De Pol-Holz R.
刊名: Geophysical Research Letters
ISSN: 0094-9198
EISSN: 1944-8929
出版年: 2015
卷: 42, 期: 14 起始页码: 6014
结束页码: 6023
语种: 英语
英文关键词: atmospheric CO2
; carbon cycle
; dust
; iron fertilization
; LGM
; paleoclimate
Scopus关键词: Biogeochemistry
; Deposition
; Dust
; Glacial geology
; Iron
; Atmospheric CO
; Carbon cycles
; Iron fertilization
; LGM
; Paleoclimates
; Climate models
; carbon cycle
; carbon dioxide
; carbonate
; comparative study
; data set
; dust
; Holocene
; Last Glacial Maximum
; numerical model
; paleoclimate
; timescale
英文摘要: Mineral dust aerosols play a major role in present and past climates. To date, we rely on climate models for estimates of dust fluxes to calculate the impact of airborne micronutrients on biogeochemical cycles. Here we provide a new global dust flux data set for Holocene and Last Glacial Maximum (LGM) conditions based on observational data. A comparison with dust flux simulations highlights regional differences between observations and models. By forcing a biogeochemical model with our new data set and using this model's results to guide a millennial-scale Earth System Model simulation, we calculate the impact of enhanced glacial oceanic iron deposition on the LGM-Holocene carbon cycle. On centennial timescales, the higher LGM dust deposition results in a weak reduction of <10ppm in atmospheric CO2 due to enhanced efficiency of the biological pump. This is followed by a further ∼10ppm reduction over millennial timescales due to greater carbon burial and carbonate compensation. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938971959&doi=10.1002%2f2015GL064250&partnerID=40&md5=6182bb305aebc354dfd2d1a06d36c555
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8814
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Physical Geography, Pontifical Catholic University of Chile, Santiago, Chile
Recommended Citation:
Lambert F.,Tagliabue A.,Shaffer G.,et al. Dust fluxes and iron fertilization in Holocene and Last Glacial Maximum climates[J]. Geophysical Research Letters,2015-01-01,42(14).