DOI: 10.1002/2015GB005254
Scopus记录号: 2-s2.0-84960888004
论文题名: Saharan versus local influence on atmospheric aerosol deposition in the southern Iberian Peninsula: Significance for N and P inputs
作者: Morales-Baquero R ; , Pérez-Martínez C
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2016
卷: 30, 期: 3 起始页码: 501
结束页码: 513
语种: 英语
英文关键词: local versus external sources
; long-range transport
; N deposition
; P deposition
; Saharan dust
Scopus关键词: aerosol property
; air mass
; atmospheric deposition
; dust
; long range transport
; nitrogen
; phosphorus
; synchrony
; variance analysis
; Iberian Peninsula
; Sahara
英文摘要: A novel methodology was used to evaluate the contribution of Saharan dust to the atmospheric deposition of particulate material (PM), total phosphorus (TP), and total nitrogen (TN) in the southeastern Iberian Peninsula. Dry and wet aerosol depositions were measured weekly during two 1 year periods at one site and simultaneously during spring-summer of the same years at two other sites (intersite distance of ~ 40 km). Statistical relationships among depositions at the different sites permitted differentiation of Saharan dust inputs from locally derived dust. PM and TP depositions were synchronous among the three study sites; the synchrony was elevated during periods of Saharan intrusions (evaluated by air mass retrotrajectories analyses), but no temporal correlation was observed during periods without Saharan intrusions. According to analysis of variance results, PM and TP depositions were both significantly affected by Saharan intrusions. During weeks with Saharan intrusions, PM deposition increased around 85% above background levels, with no differences among the three sites, while TP deposition increased by 1.1 μmol TP m-2 d-1, i.e., 29% to 81% above background levels depending on the site. There were no correlations or differences in TN deposition among sites or as a function of Saharan intrusion periods. The annual contribution of PM and TP from Saharan dust was 75 kg ha-1 and 0.07 kg P ha-1, respectively, which can be considered a genuine input for the ecosystems in this area. This novel approach is likely to be valid in any area in the world under atmospheric deposition of long-range transported material. ©2016. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77871
Appears in Collections: 气候变化事实与影响
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作者单位: Departamento de Ecología, Instituto del Agua, Universidad de Granada, Granada, Spain
Recommended Citation:
Morales-Baquero R,, Pérez-Martínez C. Saharan versus local influence on atmospheric aerosol deposition in the southern Iberian Peninsula: Significance for N and P inputs[J]. Global Biogeochemical Cycles,2016-01-01,30(3)