@Article{RochaCoSaFrMoSiFi:2015:ReClMo,
               author = "Rocha, Vin{\'{\i}}cius Machado and Correia, Francis Wagner 
                         Correia and Satyamurty, Prakki and Freitas, Saulo Ribeiro de and 
                         Moreira, Demerval Soares and Silva, Paulo Ricardo Teixeira da and 
                         Fialho, Edson Soares",
          affiliation = "{Instituto Nacional de Pesquisas Amaz{\^o}nicas (INPA)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Universidade Federal do Alagoas (UFAL)} and 
                         {Universidade Federal de Vi{\c{c}}osa (UFV)}",
                title = "Impacts of land cover and greenhouse gas (ghg) concentration 
                         changes on the hydrological cycle in amazon basin: a regional 
                         climate model study",
              journal = "Revista Brasileira de Climatologia",
                 year = "2015",
               volume = "15",
                pages = "7",
             keywords = "Amazon basin, Deforestation, GHG Scenarios, IPCC-AR4, BRAMS, 
                         Amaz{\^o}nia, desflorestamento, cen{\'a}rios de emiss{\~o}es, 
                         IPCC-AR4, BRAMS.",
             abstract = "The Brazilian Regional Atmospheric Modeling System (BRAMS) coupled 
                         with the dynamic vegetation scheme known as General Energy and 
                         Mass Transport Model (GEMTM) and land cover scenarios in the 
                         Amazon Basin and greenhouse gas concentration increase scenarios 
                         produced by Community Climate System Model of the National Center 
                         for Atmospheric Research are used to evaluate the impacts on the 
                         hydrological cycle of the Amazon Basin. The 2050 estimates of 
                         deforestation and the greenhouse gas concentration scenarios (A2) 
                         impact significantly the energy and moisture budgets. The dynamic 
                         structure of the atmosphere and consequently the moisture and mass 
                         convergence in the region are projected to be significantly 
                         different in 2050. The changes are more intense in the simulations 
                         with the combined effect of deforestation and greenhouse gas 
                         increase. In the deforestation scenario, a positive feedback is 
                         established in which changes in the regional circulation reduced 
                         the moisture convergence and precipitation in the region. In the 
                         increased greenhouse gas concentration scenario, with and without 
                         deforestation, a negative (positive) feedback is established in 
                         the rainy (dry) season in which the regional circulation changes 
                         (moisture convergence) are responsible for the reduction of 
                         precipitation. The results indicate that rapid destruction of the 
                         forest and the climate changes due to human activity can become 
                         irreversible, and that changes on hydrological cycle and 
                         perturbation in the complex relation between soil, plant and 
                         atmosphere can trigger significant changes in the ecosystems in 
                         the Amazon, once these systems do not present resilience or 
                         capacity to adapt to the magnitude of changes in the climate. 
                         RESUMO: O modelo regional BRAMS (Brazilian Regional Atmospheric 
                         Modeling System) acoplado ao esquema de vegeta{\c{c}}{\~a}o 
                         din{\^a}mica General Energy and Mass Transport Model (GEMTM) e 
                         cen{\'a}rios de usos da terra na Amaz{\^o}nia e de aumento na 
                         concentra{\c{c}}{\~a}o dos gases do efeito estufa na atmosfera 
                         produzidos a partir das simula{\c{c}}{\~o}es clim{\'a}ticas do 
                         Modelo de Circula{\c{c}}{\~a}o Geral Community Climate System 
                         Model (CCSM3), do National Center for Atmospheric Research (NCAR), 
                         s{\~a}o utilizados para avaliar os impactos no ciclo 
                         hidrol{\'o}gico da bacia amaz{\^o}nica. A proje{\c{c}}{\~a}o 
                         de desflorestamento para o ano de 2050 e cen{\'a}rio de 
                         emiss{\~a}o dos gases do efeito estufa (A2) afetam de forma 
                         significativa os balan{\c{c}}os de energia e de {\'a}gua, a 
                         estrutura din{\^a}mica da atmosfera e, consequentemente, a 
                         converg{\^e}ncia de umidade e massa na bacia. As mudan{\c{c}}as 
                         s{\~a}o mais intensas na simula{\c{c}}{\~a}o que existe o 
                         efeito combinando do desflorestamento e aumento dos gases do 
                         efeito estufa. No cen{\'a}rio de desflorestamento, o mecanismo de 
                         retroalimenta{\c{c}}{\~a}o positivo {\'e} estabelecido, no qual 
                         as altera{\c{c}}{\~o}es na circula{\c{c}}{\~a}o regional 
                         reduziram a converg{\^e}ncia de umidade e a 
                         precipita{\c{c}}{\~a}o na regi{\~a}o. Nos cen{\'a}rios de 
                         aumento dos gases do efeito estufa, sem e com desflorestamento, o 
                         mecanismo de retroalimenta{\c{c}}{\~a}o {\'e} negativo 
                         (positivo) na esta{\c{c}}{\~a}o {\'u}mida (seca), no qual as 
                         mudan{\c{c}}as na circula{\c{c}}{\~a}o regional tamb{\'e}m 
                         conduziram a redu{\c{c}}{\~a}o na precipita{\c{c}}{\~a}o. Os 
                         resultados indicam que a r{\'a}pida destrui{\c{c}}{\~a}o da 
                         floresta e as mudan{\c{c}}as no clima regional decorrente de 
                         a{\c{c}}{\~o}es antropog{\^e}nicas podem tornar-se um processo 
                         irrevers{\'{\i}}vel, e que as mudan{\c{c}}as no ciclo 
                         hidrol{\'o}gico e as perturba{\c{c}}{\~o}es na complexa 
                         rela{\c{c}}{\~a}o solo-planta-atmosfera podem desencadear 
                         altera{\c{c}}{\~o}es significativas nos ecossistemas naturais da 
                         Amaz{\^o}nia, j{\'a} que os mesmos n{\~a}o apresentam grande 
                         capacidade de adapta{\c{c}}{\~a}o {\`a} magnitude das 
                         mudan{\c{c}}as no clima.",
                 issn = "2237-8642",
                label = "lattes: 9873289111461387 4 RochaCoSaFrMoSiFi:2015:RECLMO",
             language = "pt",
        urlaccessdate = "18 abr. 2024"
}