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| Registros recuperados: 58 | |
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| Govin, Aline; Varma, Vidya; Prange, Matthias. |
| This study documents the long-term evolution of western African precipitation during the Last Interglacial (LIG). We compare geochemical records obtained on nine sediment cores from the western African margin to a transient simulation (130–115 ka) performed with an ocean-atmosphere general circulation model and insolation as sole forcing. Good agreement between proxy records and model outputs indicates that long-term changes in western African precipitation largely responded to insolation variations during most of the LIG. After an early LIG dry phase (related to high-latitude iceberg melting or dating uncertainties), boreal summer insolation controlled the intensification of the North African monsoon between 127 and 122 ka, perhaps facilitating human... |
| Tipo: Text |
Palavras-chave: Last Interglacial; Africa; Precipitation; Astronomical forcing; Marine sediment cores; Model simulations. |
| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00290/40164/38778.pdf |
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| FIETZ, C. R.; COMUNELLO, E.; CREMON, C.; DALLACORT, R.; PEREIRA, S. B.. |
| O objetivo deste trabalho foi determinar a probabilidade de ocorrência de chuvas intensas no Estado de Mato Grosso. Séries com os valores máximos anuais da precipitação de um dia de 151 postos pluviométricos de Mato Grosso foram ajustadas à Distribuição de Gumbel. Os parâmetros da distribuição foram estimados pelo método de máxima verossimilhança. Houve ajuste de todas as séries de intensidade máxima anual à distribuição Gumbel, de acordo com o teste Kolmogorov-Smirnov. Através das distribuições ajustadas foram calculados os valores de precipitação máxima de 1 dia para períodos de retorno de 2, 3, 4, 5, 10, 15, 20 e 50 anos. Utilizando o método de desagregação de chuvas, estimou-se a precipitação máxima com duração de 5, 10, 15, 20, 25, 30 minutos e 1, 6,... |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Probabilidade; Mato Grosso; Intense rainfall; Precipitation; Gumbel distribution.; Chuva.. |
| Ano: 2010 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/866618 |
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| Cardozo,Nilceu Piffer; Sentelhas,Paulo Cesar. |
| The lack of information about the effects of cultivars, crop age and climate on the sugarcane (Saccharum ssp.) crop yield and quality has been the primary factor impacting the sugar-ethanol sector in Brazil. One of the processes about which we do not have a satisfactory understanding is sugarcane ripening and the effects of cultivars, crop age and climate on that. Sugarcane ripening is the process of sucrose accumulation in stalks, which is heavily influenced by several factors, mainly by climatic conditions such as air temperature and water deficits. Because it is a complex process, studies of the variables involved in sugarcane ripening can provide important information, resulting in a better use of commercial cultivars, bringing advantages to growers,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum spp; Air temperature; Precipitation; Water deficit; Sucrose. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000600011 |
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| FERRO MUÑOZ,Natalia; GIRALDO,Alan; MURILLO GARCÍA,Oscar Enrique. |
| ABSTRACT The present study describes composition and trophic structure, and assesses the effect of environmental temperature and rainfall on the pattern of nocturnal activity of understory bats in an Andean forest, in the first half of the night. Seven sampling events were conducted, lasting six nights each one. Ten mist nets were used to capture bats, which were checked every hour between 18:00 and 00:00 hours. Bat species, sex and capture time were registered. In addition, environmental temperature and rainfall were also recorded during sampling. The bat assemblage of the understory of the study area was represented mostly by frugivore species, within this guild there was a lower richness of nomadic than sedentary species. For the first half of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environmental temperature; Precipitation; Trophic levels. |
| Ano: 2018 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2018000200170 |
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| Mattos, Patricia Póvoa de; Santos, Andreia Taborda dos; Oliveira, Yeda Maria Malheiros de; Rosot, Maria Augusta Doetzer. |
| In the present work the dendrochronological potential of six species of the Araucaria Forest is analyzed. The trunks of 20 trees were collected in Candoi, State of Parana, Brazil, from an area that belongs toELEJOR, Centrais Elétricas do Rio Jordão, for the following species: Araucaria angustifolia, Clethra scabra, Cedrela lilloi, Ocotea porosa, Podocarpus lambertii and Sebastiania commersoniana (3 to 6, from each species). The trunks were sawed, and at breast height a sample was taken from the center of the board, from bark to bark, crossing the pith, for macroscopic analysis. These samples were dried and polished, making possible the recognition and measurement of growth rings The historical climatic data series were provided by SIMEPAR, the State... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Growth rings; Precipitation; Temperature; Forest dynamics; Atlantic Rain Forest Anéis de crescimento; Precipitação pluviométrica; Temperatura; Dinâmica de florestas; Mata Atlântica. |
| Ano: 2010 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/141 |
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| LIMA,RAFAEL P.C.; SILVA,DEMETRIUS D. DA; MOREIRA,MICHEL C.; PASSOS,JÉSSICA B.M.C.; COELHO,CLÍVIA D.; ELESBON,ABRAHÃO A.A.. |
| Abstract: In order to characterize the occurrence and intensity of droughts in the Doce River Basin, as well as to develop a system for its classification, four different drought indexes were evaluated: Percent of Normal Precipitation (PNP), Deciles Method (DM), Rainfall Anomaly Index (RAI) and Standardized Precipitation Index (SPI). The indices were calculated annually, based on precipitation data from 89 rainfall stations of the Brazilian National Water Agency (ANA). Nine analysis units (AUs) were determined in the basin and the Thiessen Polygons method was used to obtain the average precipitation in the respective drainage areas. The indices were calculated for each AU and then related to the drought intensity classes. An overall classification of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Climatic condition; Doce river; Precipitation; Rainfall season; River basin. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000100852 |
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| MIRANDA, E. E. de; OLIVEIRA, J. T. S.; MIRANDA, J. de S.; BARROS, R. J. S.. |
| Este trabalho apresenta quatro (4) equações capazes de estimar as precipitações anuais para qualquer ponto do Estado, partindo unicamente de seus parâmetros de localização geográfica. Ajustadas "in situ", elas foram elaboradas para uma área de 460.000 km2 que engloba todo o estado do Piauí e partes dos estados limítrofes, do Maranhão, Ceará, Pernambuco e Bahia. Cada equação tem as variáveis, distância, angulo, altitude, coordenadas cartesianas e suas interações com relação a uma estação de referência. Nas regiões estudadas as equações obtidas permitem uma estimação das precipitações anuais com um desvio médio de aproximadamente 10% para o conjunto das estações estudadas. dadas. |
| Tipo: Livros |
Palavras-chave: Distribuição espacial; Piauí; Precipitation; Distribution; Chuva; Precipitação pluvial; Meteorologia; Meteorology; Rain. |
| Ano: 1981 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/132587 |
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| Owen,Robert D. |
| The Cerrado extends as islands or patches into the Upper Paraná Atlantic Forest (UPAF) of Brazil and Paraguay. This study evaluates the temporal dynamics of a marginal terrestrial small-mammal community in an isolated Cerrado patch within the UPAF, at the southwestern distributional limit of the Cerrado and near the western limit of the UPAF in eastern Paraguay. Because the faunal members of marginal communities are living near the limits of their capabilities in terms of their abiotic and biotic environment, the communities in such areas are likely to be a mixture of Cerrado and UPAF species, sensitive to extrinsic variables such as climate change and anthropogenic changes in land use. In this 23-month study, temporal dynamics of a terrestrial... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cricetidae; Didelphidae; Echimyidae; Fire; ENSO; Precipitation. |
| Ano: 2013 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832013000100007 |
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| Back,Álvaro J.; Pola,Augusto C.; Ladwig,Nilzo I.; Schwalm,Hugo. |
| ABSTRACT This study aimed to determine the rainfall erosivity index in the Valley of Rio do Peixe, in the state of Santa Catarina, Brazil. The data series of three rain gauge stations in the cities of Campos Novos, Videira, and Caçador were used to determine the rainfall erosivity based on the EI30 index and to adjust the equations in order to estimate the EI30 value from the rainfall coefficient. On average, it was observed that erosive rains represents 81.4-88.5% of the annual precipitation. The adjusted equations can be used to estimate rainfall erosivity in locations with only rainfall data. The regional equation specified for the erosivity estimation is EI30 = 74.23 Rc0.8087. The R factor is 8,704.8; 7,340.8; and 6,387.1 MJ mm ha-1 h-1 year-1 for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil loss; Soil conservation; Water erosion; Precipitation. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017001100774 |
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| Registros recuperados: 58 | |
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