Drylands, aridification and land governance in Latin America. A regional perspective

Authors: Marco Millones Mayer*, University of Mary Washington, Elsa Nickl, University of Delaware, Benoit Parmententier, University of Mary Washington, Simone Lucatello, Instituto Mora, Alonso Trejo, Universidad Autonoma de Mexico
Topics: Environmental Science, Global Change, Climatology and Meteorology
Keywords: drylands, climate change, environmental governance
Session Type: Poster
Day: 4/5/2019
Start / End Time: 1:10 PM / 2:50 PM
Room: Lincoln 2, Marriott, Exhibition Level
Presentation File: No File Uploaded


Aridification of drylands and the conversion of other landscapes into increasingly dry ones is a problem identified by the scientific and international policy community and the Sustainable Development goals.
In this post we address the degree to which drylands have increased and turned more arid over the overtime using geographic information systems, climate station, and remote sensing data across Latin America. We identify dryland regions based on the Garcia modified Koppen Classification (2004), in Mexico; and based on the Lopez OcaƱa (1982) Arid Zones for Peru. We evaluate and identify changes within those regions using the Aridity Index (UNESCO, FAO) that measures the annual ratio of evapotranspiration to precipitation extracted from data from 1900 to the present over a 0.5 degree resolution grid provided by the Global Precipitation Climate Center from t (GPCC-University of Delaware). We compare Aridity Index summary statistics and trends across different land tenure and land use regime for each country as a proxy of land based environmental governance using spatial statistical analysis. We expect to find differences and similarities in trends within and between arid regions under different land regimes, namely: communal lands, private lands, government-protected areas, as well as areas dominated by extractive industries such as mining, and hydrocarbon extraction activities

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