DOI: 10.1016/j.atmosenv.2018.02.007
Scopus记录号: 2-s2.0-85042191495
论文题名: Total dissolved atmospheric nitrogen deposition in the anoxic Cariaco basin
作者: Rasse R ; , Pérez T ; , Giuliante A ; , Donoso L
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 179 起始页码: 118
结束页码: 131
语种: 英语
Scopus关键词: Atmospheric movements
; Biogeochemistry
; Budget control
; Dissolution
; Meteorological problems
; Nitrogen
; Oceanography
; Atmospheric depositions
; Atmospheric nitrogen deposition
; Concentration values
; Industrial revolutions
; Marine biogeochemistries
; Ocean biogeochemistry
; Total suspended particles
; Wind velocity and direction
; Atmospheric chemistry
; dissolved inorganic matter
; dissolved organic matter
; natural products and their synthetic derivatives
; nitrogen derivative
; unclassified drug
; Article
; atmospheric deposition
; chemical analysis
; chemical composition
; dry deposition
; ion chromatography
; nitrogen deposition
; oxidation
; priority journal
; seasonal variation
; suspended particulate matter
; velocity
; wet deposition
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Atmospheric deposition of total dissolved nitrogen (TDN) is an important source of nitrogen for ocean primary productivity that has increased since the industrial revolution. Thus, understanding its role in the ocean nitrogen cycle will help assess recent changes in ocean biogeochemistry. In the anoxic Cariaco basin, the place of the CARIACO Ocean Time-Series Program, the influence of atmospherically-deposited TDN on marine biogeochemistry is unknown. In this study, we measured atmospheric TDN concentrations as dissolved organic (DON) and inorganic (DIN) nitrogen (TDN = DIN + DON) in atmospheric suspended particles and wet deposition samples at the northeast of the basin during periods of the wet (August–September 2008) and dry (March–April 2009) seasons. We evaluated the potential anthropogenic N influences by measuring wind velocity and direction, size-fractionated suspended particles, chemical traces and by performing back trajectories. We found DIN and DON concentration values that ranged between 0.11 and 0.58 μg-N m−3 and 0.11–0.56 μg-N m−3 in total suspended particles samples and between 0.08 and 0.54 mg-N l−1 and 0.02–1.3 mg-N l−1 in wet deposition samples, respectively. Continental air masses increased DON and DIN concentrations in atmospheric suspended particles during the wet season. We estimate an annual TDN atmospheric deposition (wet + particles) of 3.6 × 103 ton-N year−1 and concluded that: 1) Atmospheric supply of TDN plays a key role in the C and N budget of the basin because replaces a fraction of the C (20% by induced primary production) and N (40%) removed by sediment burial, 2) present anthropogenic N could contribute to 30% of TDN atmospheric deposition in the basin, and 3) reduced DON (gas + particles) should be a significant component of bulk N deposition. © 2018 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82954
Appears in Collections: 气候变化事实与影响
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作者单位: Instituto Venezolano de Investigaciones Científicas, Centro de Ciencias Atmosféricas y Biogeoquímica, Laboratorio de Biogeoquímica, Aptdo, 20632, Caracas, Venezuela; Plymouth Marine Laboratory, Plymouth, United Kingdom
Recommended Citation:
Rasse R,, Pérez T,, Giuliante A,et al. Total dissolved atmospheric nitrogen deposition in the anoxic Cariaco basin[J]. Atmospheric Environment,2018-01-01,179