Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1002/2014GB004852 |
The significance of the episodic nature of atmospheric deposition to Low Nutrient Low Chlorophyll regions | |
Guieu, C.1; Aumont, O.2; Paytan, A.3; Bopp, L.4; Law, C. S.5,6; Mahowald, N.7; Achterberg, E. P.8; Maranon, E.9; Salihoglu, B.10; Crise, A.11; Wagener, T.12; Herut, B.13; Desboeufs, K.14; Kanakidou, M.15; Olgun, N.16,21; Peters, F.17; Pulido-Villena, E.12; Tovar-Sanchez, A.18,19; Voelker, C.20 | |
通讯作者 | Guieu, C. |
来源期刊 | GLOBAL BIOGEOCHEMICAL CYCLES
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EISSN | 1944-9224 |
出版年 | 2014 |
卷号 | 28期号:11页码:1179-1198 |
英文摘要 | In the vast Low Nutrient Low-Chlorophyll (LNLC) Ocean, the vertical nutrient supply from the subsurface to the sunlit surface waters is low, and atmospheric contribution of nutrients may be one order of magnitude greater over short timescales. The short turnover time of atmospheric Fe and N supply (<1month for nitrate) further supports deposition being an important source of nutrients in LNLC regions. Yet, the extent to which atmospheric inputs are impacting biological activity and modifying the carbon balance in oligotrophic environments has not been constrained. Here, we quantify and compare the biogeochemical impacts of atmospheric deposition in LNLC regions using both a compilation of experimental data and model outputs. A metadata-analysis of recently conducted field and laboratory bioassay experiments reveals complex responses, and the overall impact is not a simple fertilization effect of increasing phytoplankton biomass as observed in HNLC regions. Although phytoplankton growth may be enhanced, increases in bacterial activity and respiration result in weakening of biological carbon sequestration. The application of models using climatological or time-averaged non-synoptic deposition rates produced responses that were generally much lower than observed in the bioassay experiments. We demonstrate that experimental data and model outputs show better agreement on short timescale (days to weeks) when strong synoptic pulse of aerosols deposition, similar in magnitude to those observed in the field and introduced in bioassay experiments, is superimposed over the mean atmospheric deposition fields. These results suggest that atmospheric impacts in LNLC regions have been underestimated by models, at least at daily to weekly timescales, as they typically overlook large synoptic variations in atmospheric deposition and associated nutrient and particle inputs. Inclusion of the large synoptic variability of atmospheric input, and improved representation and parameterization of key processes that respond to atmospheric deposition, is required to better constrain impacts in ocean biogeochemical models. This is critical for understanding and prediction of current and future functioning of LNLC regions and their contribution to the global carbon cycle. |
英文关键词 | aerosol addition pulse experimental approach modeling approach new nutrients carbon cycle |
类型 | Article |
语种 | 英语 |
国家 | France ; USA ; New Zealand ; England ; Spain ; Turkey ; Italy ; Israel ; Greece ; Germany |
收录类别 | SCI-E |
WOS记录号 | WOS:000346594100002 |
WOS关键词 | OLIGOTROPHIC MEDITERRANEAN SEA ; SIMULATED DUST-DEPOSITION ; SAHARAN DUST ; N-2 FIXATION ; DESERT DUST ; PRIMARY PRODUCTIVITY ; MESOCOSM EXPERIMENT ; NITROGEN-FIXATION ; CLIMATE-CHANGE ; CARBON BUDGET |
WOS类目 | Environmental Sciences ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences |
来源机构 | French National Research Institute for Sustainable Development ; E17 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/182336 |
作者单位 | 1.Univ Paris 06, INSU, CNRS, UMR7093,LOV, Villefranche Sur Mer, France; 2.Ctr IRD Bretagne, Inst Europeen Mer, Lab Phys Oceans, Plouzane, France; 3.Univ Calif Santa Cruz, Inst Marine Sci, Santa Cruz, CA 95064 USA; 4.UVSQ, CEA, CNRS, LSCE,IPSL, Gif Sur Yvette, France; 5.Natl Inst Water & Atmospher Res NIWA, Wellington, New Zealand; 6.Univ Otago, Dept Chem, Dunedin, New Zealand; 7.Cornell Univ, Dept Earth & Atmospher Sci, Ithaca, NY USA; 8.Univ Southampton, Natl Oceanog Ctr Southampton, Southampton, Hants, England; 9.Univ Vigo, Fac Ciencias Mar, Dept Ecol & Biol Anim, Vigo 36310, Spain; 10.METU, Inst Marine Sci, Mersin, Turkey; 11.Ist Nazl Oceanog & Geofis Sperimentale OGS, Trieste, Italy; 12.Univ AIX Marseille, Inst Mediterraneen Oceanol MIO, CNRS, UMR 7294,IRD, Marseille, France; 13.Natl Inst Oceanog, Israel Oceanog & Limnol Res IOLR, IL-31080 Haifa, Israel; 14.Univ Paris Diderot, Univ Paris Est Creteil, CNRS, UMR 7583,Inst Pierre Simon Laplace,Lab Interuniv, Creteil, France; 15.Univ Crete, Dept Chem, Environm Chem Proc Lab, Iraklion, Greece; 16.Helmholtz Ctr Ocean Res Kiel, GEOMAR, Kiel, Germany; 17.CSIC, CMIMA, Inst Ciencies Mar, Barcelona, Spain; 18.UIB, Dept Global Change Res IMEDEA, CSIC, Inst Mediterraneo Estudios Avanzados, Madrid, Spain; 19.CSIC, ICMAN, Andalusian Inst forMarine Sci, Dept Ecol & Coastal Management, Cadiz, Spain; 20.Alfred Wegener Inst Polar & Marine Res, Bremerhaven, Germany; 21.Istanbul Tech Univ, Eurasia Inst Earth Sci, Istanbul, Turkey |
推荐引用方式 GB/T 7714 | Guieu, C.,Aumont, O.,Paytan, A.,et al. The significance of the episodic nature of atmospheric deposition to Low Nutrient Low Chlorophyll regions[J]. French National Research Institute for Sustainable Development, E17,2014,28(11):1179-1198. |
APA | Guieu, C..,Aumont, O..,Paytan, A..,Bopp, L..,Law, C. S..,...&Voelker, C..(2014).The significance of the episodic nature of atmospheric deposition to Low Nutrient Low Chlorophyll regions.GLOBAL BIOGEOCHEMICAL CYCLES,28(11),1179-1198. |
MLA | Guieu, C.,et al."The significance of the episodic nature of atmospheric deposition to Low Nutrient Low Chlorophyll regions".GLOBAL BIOGEOCHEMICAL CYCLES 28.11(2014):1179-1198. |
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