Stable isotopic characterization of nitrate wet deposition in the tropical urban atmosphere of Costa Rica

2021 ◽  
Author(s):  
Mario Villalobos-Forbes ◽  
Germain Esquivel-Hernández ◽  
Ricardo Sánchez-Murillo ◽  
Rolando Sánchez-Gutiérrez ◽  
Ioannis Matiatos
Keyword(s):  
Costa Rica ◽  
Wet Deposition ◽  
Urban Atmosphere ◽  
Stable Isotopic ◽  
Isotopic Characterization

Stable Isotopic Characterization of Nitrate Wet Deposition in the Tropical Urban Atmosphere of Costa Rica

2021 ◽  
Author(s):  
Mario Villalobos-Forbes ◽  
Germain Esquivel-Herna ◽  
Ricardo Sánchez-Murillo ◽  
Rolando Sánchez-Gutiérrez ◽  
Ioannis Matiatos
Keyword(s):  
Stable Isotopes ◽  
Costa Rica ◽  
Atmospheric Chemistry ◽  
Wet Deposition ◽  
Inorganic Nitrogen ◽  
Nitrogen Sources ◽  
Urban Atmosphere ◽  
Back Trajectory ◽  
Tropical Regions ◽  
Isotopic Characterization

Abstract Increasing energy consumption and food production worldwide results in anthropogenic emissions of reactive nitrogen into the atmosphere. To date, however, little information is available on tropical urban environments where inorganic nitrogen is vastly transported and deposited through precipitation on terrestrial and aquatic ecosystems. To fill this gap, we present compositions of water stable isotopes in precipitation and atmospheric nitrate (δ18O-H2O, δ2H-H2O, δ15N-NO3-, and δ18O-NO3-) collected daily between August 2018 and November 2019 in a tropical urban atmosphere of central Costa Rica. Rainfall generation processes (convective and stratiform) were identified using stable isotopes in precipitation combined with air mass back trajectory analysis. A Bayesian isotope mixing model forced with δ15N-NO3- values corrected for potential 15N fractionation effects reveal the predominant contribution of biomass burning and lightning to nitrate wet deposition. δ18O-NO3- values in Caribbean convective rainfall reflect the oxidation chemistry of NOx sources whereas δ15N-NO3- values in Pacific stratiform rainfall indicate the transport of nitrogen sources contributing to nitrate in atmospheric deposition. These findings provide necessary baseline information about the combination of water and nitrogen stable isotopes with atmospheric chemistry and hydrometeorological techniques to better understand wet deposition processes and to characterize the origin of inorganic nitrogen loadings in tropical regions.

Stable isotopic characterization of active pharmaceutical ingredients

2004 ◽  
Vol 35 (1) ◽  
pp. 21-30 ◽  
Author(s):  
J.P. Jasper ◽  
B.J. Westenberger ◽  
J.A. Spencer ◽  
L.F. Buhse ◽  
M. Nasr
Keyword(s):  
Active Pharmaceutical Ingredients ◽  
Pharmaceutical Ingredients ◽  
Stable Isotopic ◽  
Isotopic Characterization

Stable isotopic characterization of ammonium metavanadate (NH4VO3)

2011 ◽  
Vol 209 (1-3) ◽  
pp. 96-101 ◽  
Author(s):  
Alan M. Volpe ◽  
Michael J. Singleton
Keyword(s):  
Ammonium Metavanadate ◽  
Stable Isotopic ◽  
Isotopic Characterization

scholarly journals Stable isotopic characterization of carbon, nitrogen and sulfur uptake of Acharax japonica from central Japan

2008 ◽  
Vol 3 (1) ◽  
pp. 36-41 ◽  
Author(s):  
Toshiro Yamanaka ◽  
Chitoshi Mizota ◽  
Kazuyo Matsuyama-Serisawa ◽  
Takeshi Kakegawa ◽  
Jun-Ichi Miyazaki ◽  
...  
Keyword(s):  
Central Japan ◽  
Stable Isotopic ◽  
Isotopic Characterization

Stable Isotopic Characterization of Nor’westers of Southern Assam, NE India

2015 ◽  
Vol 1 (1,2) ◽  
pp. 75-87 ◽  
Author(s):  
A.H. Laskar ◽  
R. Ramesh ◽  
J. Burman ◽  
M. Midhun ◽  
M.G. Yadava ◽  
...  
Keyword(s):  
Ne India ◽  
Stable Isotopic ◽  
Isotopic Characterization

scholarly journals Stable isotopic characterization of a coastal floodplain forest community: a case study for isotopic reconstruction of Mesozoic vertebrate assemblages

2019 ◽  
Vol 6 (2) ◽  
pp. 181210 ◽  
Author(s):  
T. M. Cullen ◽  
F. J. Longstaffe ◽  
U. G. Wortmann ◽  
M. B. Goodwin ◽  
L. Huang ◽  
...  
Keyword(s):  
Nitrogen Isotope ◽  
Floodplain Forest ◽  
Forest Community ◽  
Atchafalaya River ◽  
Isotope Data ◽  
Stable Isotopic ◽  
Isotopic Characterization ◽  
Isotopic Baseline ◽  
Atchafalaya River Basin

Stable isotopes are powerful tools for elucidating ecological trends in extant vertebrate communities, though their application to Mesozoic ecosystems is complicated by a lack of extant isotope data from comparable environments/ecosystems (e.g. coastal floodplain forest environments, lacking significant C 4 plant components). We sampled 20 taxa across a broad phylogenetic, body size, and physiological scope from the Atchafalaya River Basin of Louisiana as an environmental analogue to the Late Cretaceous coastal floodplains of North America. Samples were analysed for stable carbon, oxygen and nitrogen isotope compositions from bioapatite and keratin tissues to test the degree of ecological resolution that can be determined in a system with similar environmental conditions, and using similar constraints, as those in many Mesozoic assemblages. Isotopic results suggest a broad overlap in resource use among taxa and considerable terrestrial–aquatic interchange, highlighting the challenges of ecological interpretation in C 3 systems, particularly when lacking observational data for comparison. We also propose a modified oxygen isotope-temperature equation that uses mean endotherm and mean ectotherm isotope data to more precisely predict temperature when compared with measured Atchafalaya River water data. These results provide a critical isotopic baseline for coastal floodplain forests, and act as a framework for future studies of Mesozoic palaeoecology.

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