O artigo relata as questões correspondentes à variabilidade climática e possibilidade de secas em regiões espacialmente distintas do Paraguai, Chaco e Oriental (Bacia do Paraná). Com base na abordagem de script GMT e conjuntos de dados de alta resolução do TerraClimate e GEBCO, o estudo examinou a extensão do clima anual e variáveis ambientais no Paraguai em 2020: temperaturas extremas, velocidade do vento, precipitação, umidade do solo, evapotranspiração, Severidade da Seca de Palmer Índice (PDSI), déficit de pressão de vapor (VPD) e a topografia do país. Os parâmetros ambientais e climáticos demonstraram variabilidade espacial no Chaco Seco com diferenças notáveis no Gran Chaco e no Chaco Boreal, áreas úmidas do Pantanal e florestas tropicais no leste do Paraguai. Além da análise do clima, fragmentos técnicos dos scripts GMT sobre as técnicas de mapeamento e processamento de dados foram explicados e comentados. Os resultados da pesquisa mostram que a evapotranspiração real atinge valores máximos na Bacia do Paraná (180 mm / ano), e tem picos ao longo do rio Pilcomayo (140-150 mm / ano) que coincide bem com a umidade do solo; os valores PDSI são máximos em Chaco Boreal e Gran Chaco; as temperaturas são mais altas nas regiões N e NW do Paraguai; o VPD mais alto (acima de 2,0) corresponde ao Chaco Boreal.

The article reports the issues corresponding to the climate variability and possibility of droughts in spatially distinct regions of Paraguay, the Chaco and the Oriental (Paraná Basin). Based on the GMT scripting approach and high-resolution datasets from the TerraClimate and GEBCO, the study examined the extent of the annual climate and environmental variables over Paraguay in 2020: extreme temperatures, wind speed, precipitation, soil moisture, evapotranspiration, Palmer's Drought Severity Index (PDSI), vapour pressure deficit (VPD) and the topography of the country. The environmental and climate parameters demonstrated spatial variability in the Dry Chaco with notable differences in Gran Chaco and Chaco Boreal, wetlands of Pantanal, and tropical rainforests in east of the Paraguay. Besides climate analysis, technical snippets from the GMT scripts regarding the mapping techniques and data processing were explained and commented. Research results show that actual evapotranspiration reaches maximal values in the Paraná Basin (180 mm/yr), and has peaks along the Pilcomayo river (140-150 mm/yr) which well coincides with the soil moisture; the PDSI values are maximal in Chaco Boreal and Gran Chaco; the temperatures are the highest in the N and NW regions of Paraguay; the highest VPD (over 2.0) corresponds to the Chaco Boreal.

Polina Lemenkova (2021). Comparative analysis of climate and topography in Chaco and Oriental, Paraguay. CADERNO DE GEOGRAFIA, 31(66), 865-888 [10.5281/zenodo.5721275].

Comparative analysis of climate and topography in Chaco and Oriental, Paraguay

Polina Lemenkova
Primo
2021

Abstract

The article reports the issues corresponding to the climate variability and possibility of droughts in spatially distinct regions of Paraguay, the Chaco and the Oriental (Paraná Basin). Based on the GMT scripting approach and high-resolution datasets from the TerraClimate and GEBCO, the study examined the extent of the annual climate and environmental variables over Paraguay in 2020: extreme temperatures, wind speed, precipitation, soil moisture, evapotranspiration, Palmer's Drought Severity Index (PDSI), vapour pressure deficit (VPD) and the topography of the country. The environmental and climate parameters demonstrated spatial variability in the Dry Chaco with notable differences in Gran Chaco and Chaco Boreal, wetlands of Pantanal, and tropical rainforests in east of the Paraguay. Besides climate analysis, technical snippets from the GMT scripts regarding the mapping techniques and data processing were explained and commented. Research results show that actual evapotranspiration reaches maximal values in the Paraná Basin (180 mm/yr), and has peaks along the Pilcomayo river (140-150 mm/yr) which well coincides with the soil moisture; the PDSI values are maximal in Chaco Boreal and Gran Chaco; the temperatures are the highest in the N and NW regions of Paraguay; the highest VPD (over 2.0) corresponds to the Chaco Boreal.
2021
Polina Lemenkova (2021). Comparative analysis of climate and topography in Chaco and Oriental, Paraguay. CADERNO DE GEOGRAFIA, 31(66), 865-888 [10.5281/zenodo.5721275].
Polina Lemenkova
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/967978
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