Técnicas de Acoplamento de Campo de Vento do Brams em Escala Reduzida para Modelos de Dispersão Atmosférica

Neste trabalho apresentamos como foi feito o acoplamento docampo de vento de um pré-processador meteorológico utilizando a versãobrasileira do Sistema de Modelagem Atmosférica Regional (BRAMS)em um Modelo de Dispersão Atmosférica

Análise do Balanço de Energia em duas Torres Micrometeorológicas do Pampa07

Análise do balanço de energia em duas torresmicrometeorológicas do PAMPA0

Análise do Fluxo de Co2 sobre uma Cultura de Soja

Análise do fluxo de CO2 sobre uma cultura de soj

The fallow period plays an important role in annual CH4 emission in a rice paddy in southern Brazil.

Paddy fields are significant anthropogenic sources of methane (CH4) emissions. In southern Brazil, rice is grown in lowland flooded areas once a year, followed by a long fallow period. This study aimed to measure CH4 fluxes in a rice paddy field in southern Brazil during the rice-growing season of 2015/2016 and the following fallow period. The fluxes were estimated using the eddy covariance (EC) technique and soil chamber (SC). Diurnal and seasonal variations of CH4 fluxes and potential meteorological drivers were analyzed. The CH4 fluxes showed distinct diurnal variations in each analyzed subperiod (vegetative, reproductive, pre-harvest, no rice, and land preparation), characterized by a single-peak diurnal pattern. The variables that most influenced methane emissions were air and surface temperatures. In the growing season, the rice vegetative stage was responsible for most of the measured emissions. The accumulated annual emission estimated was 44.88 g CH4 m?2 y?1, being 64% (28.50 g CH4 m?2) due to the rice-growing season and 36% (16.38 g CH4 m?2) due to the fallow period. These results show the importance of including fallow periods in strategies to mitigate methane emissions in flood irrigated rice-growing areas

Untersuchung zur Konzeption eines zukuenftigen digitalen MAT-Systems Schlussbericht

Copy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman