scholarly journals Temporal and spatial variations in organic and elemental carbon concentrations in PM10/PM2.5 in the metropolitan area of Costa Rica, Central America

2013 ◽  
Vol 4 (1) ◽  
pp. 53-63 ◽  
Author(s):  
Jorge Herrera Murillo ◽  
Jose Felix Rojas Marin ◽  
Susana Rodriguez Roman ◽  
Victor Hugo Beita Guerrero ◽  
David Solorzano Arias ◽  
...  
Keyword(s):  
Costa Rica ◽  
Central America ◽  
Metropolitan Area ◽  
Elemental Carbon ◽  
Spatial Variations ◽  
Temporal And Spatial Variations ◽  
Temporal And Spatial ◽  
Carbon Concentrations

scholarly journals Temporal and Spatial Variations of Atmospheric Radiocarbon in the Mexico City Metropolitan Area

Radiocarbon ◽  
2015 ◽  
Vol 57 (3) ◽  
pp. 363-375 ◽  
Author(s):  
Laura Beramendi-Orosco ◽  
Galia Gonzalez-Hernandez ◽  
Adriana Martinez-Jurado ◽  
Angeles Martinez-Reyes ◽  
Alfonso Garcia-Samano ◽  
...  
Keyword(s):  
Mexico City ◽  
Metropolitan Area ◽  
Forest Fires ◽  
Fossil Fuels ◽  
Complex Mixture ◽  
Temporal Variations ◽  
Spatial Variations ◽  
Temporal And Spatial Variations ◽  
C Cycle ◽  
Temporal And Spatial

The Mexico City Metropolitan Area (MCMA) produces a complex mixture of gases and aerosols from diverse sources, including burning of fossil fuels, biomass, and wastes, with a significant biogenic contribution. We present the first results of ongoing projects to study temporal and spatial variations of 14CO2 in the area. Temporal variations reconstructed from tree rings of Taxodium mucronatum indicate a considerable radiocarbon depletion, in accordance to the vast amount of fossil fuels burnt inside Mexico Valley, with values between 62 and 246‰ lower than background values for the 1962–1968 period, and lower by 51–88‰ for the 1983–2010 period. The lower dilution found for the last decades might indicate an increase in enriched 14CO2 sources. Results from the spatial distribution, as revealed from integrated CO2 samples and grasses from six points within the MCMA collected during the 2013 dry season, show variations between sites and sample types. For integrated CO2 samples, values range from 35.6‰ to 54.0‰, and for grasses between −86.8‰ and 40.7‰. For three of the sampling points, the grasses are significantly depleted, by up to ∼133‰, as compared to the corresponding integrated CO2 sample. This may result from differences in the carbon assimilation period and exposure to different CO2 sources. Higher-than-background Δ14C values were found for all integrated CO2 samples, presumably resulting from 14C-enriched CO2 derived from forest fires in the mountains during the sampling period. Results obtained so far confirm the complexity of the 14C cycle in the MCMA.

scholarly journals Monitoring of temporal and spatial variations in fumarole helium and carbon dioxide characteristics at Po^|^aacute;s and Turrialba volcanoes, Costa Rica (2001-2009)

2010 ◽  
Vol 44 (5) ◽  
pp. 431-440 ◽  
Author(s):  
D. R. HILTON ◽  
C. J. RAM^|^Iacute;REZ ◽  
R. MORA-AMADOR ◽  
T. P. FISCHER ◽  
E. F^|^Uuml;RI ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Costa Rica ◽  
Spatial Variations ◽  
Temporal And Spatial Variations ◽  
Temporal And Spatial

Temporal and spatial variations of PM2.5 organic and elemental carbon in Central India

2018 ◽  
Vol 40 (5) ◽  
pp. 2205-2222 ◽  
Author(s):  
Rakesh Kumar Sahu ◽  
Shamsh Pervez ◽  
Judith C. Chow ◽  
John G. Watson ◽  
Suresh Tiwari ◽  
...  
Keyword(s):  
Elemental Carbon ◽  
Central India ◽  
Spatial Variations ◽  
Temporal And Spatial Variations ◽  
Temporal And Spatial

Temporal and Spatial Variations in the Dynamics of US Metropolitan Office Markets

2019 ◽  
Author(s):  
Steven Devaney ◽  
Patric Hendershott ◽  
Angela Black ◽  
Bryan MacGregor
Keyword(s):  
Spatial Variations ◽  
Temporal And Spatial Variations ◽  
Office Markets ◽  
Temporal And Spatial

TEMPORAL AND SPATIAL VARIATIONS OF TRACE METAL LOADING TO UTAH LAKE (UT), U.S.A

2016 ◽  
Author(s):  
Hannah Peterson ◽  
◽  
Henintsoa Rakotoarisaona ◽  
Henintsoa Rakotoarisaona ◽  
Weihong Wang ◽  
...  
Keyword(s):  
Trace Metal ◽  
Spatial Variations ◽  
Temporal And Spatial Variations ◽  
Metal Loading ◽  
Temporal And Spatial ◽  
Utah Lake

Temporal and spatial variations of aerosol optical properties over the Korean peninsula during KORUS-AQ

2021 ◽  
pp. 118301
Author(s):  
Yongjoo Choi ◽  
Young Sung Ghim ◽  
Michal Segal Rozenhaimer ◽  
Jens Redemann ◽  
Samuel E. LeBlanc ◽  
...  
Keyword(s):  
Optical Properties ◽  
Korean Peninsula ◽  
Spatial Variations ◽  
Aerosol Optical Properties ◽  
Temporal And Spatial Variations ◽  
Temporal And Spatial
Sign in / Sign up

Export Citation Format

Share Document