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Filtering by: Creator Navarrete, Sergio A. Decade 2000-2009

Economic modeling of tropical deforestation in Antioquia (Colombia), 1980-2000 : an analysis at a semi-fine scale with spatially explicit data

Creator:

Orrego, Sergio A.

Abstract:

This dissertation used land rent theory and an economic model of land-use conversion to examine the main drivers of the deforestation occurred in Antioquia,Colombia, between 1980 and 2000. Land-cover information at a semi-fine scale (1:25,000) obtained largely from aerial photography was employed to calculate deforestation. In addition, free international databases...

Resource Type:

Dissertation

Full Text:

Data by Sergio Orrego A DISSERTATION submitted to Oregon State
Sources and fluxes of atmospheric trace elements to the Gulf of Aqaba, Red Sea

Creator:

Chen, Ying, Paytan, Adina, Chase, Zanna, Measures, Christopher, Beck, Aaron J., Sañudo-Wilhelmy, Sergio A., and Post, Anton F.

Abstract:

We present the first comprehensive investigation of the concentrations, fluxes and sources of aerosol trace elements over the Gulf of Aqaba. We found that the mean atmospheric concentrations of crustally derived elements such as Al, Fe and Mn (1081, 683, and 16.7 ng m¯³) are about 2–3 times higher than...

Resource Type:

Article

Full Text:

Aaron J. Beck,4 Sergio A. Sañudo-Wilhelmy,5 and Anton F. Post6 Received 28 June 2007; revised 11