ABSTRACT
The problem of developing a 2-week-on ahead forecast of atmospheric cypress pollen levels is tackled in this paper by developing a principal component multiple regression model involving several climatic variables. The efficacy of the proposed model is validated by means of an application to real data of Cupressaceae pollen concentration in the city of Granada (southeast of Spain). The model was applied to data from 11 consecutive years (1995-2005), with 2006 being used to validate the forecasts. Based on the work of different authors, factors as temperature, humidity, hours of sun and wind speed were incorporated in the model. This methodology explains approximately 75-80% of the variability in the airborne Cupressaceae pollen concentration.
Subject(s)
Allergens/analysis , Cupressaceae , Models, Theoretical , Pollen , Cities , Forecasting , Humidity , Principal Component Analysis , Regression Analysis , Spain , Temperature , WindABSTRACT
This work aimed to evaluate the remaining phosphorus tenors and correlate with the chemical, physical and mineralogical attributes in soils horizons developed from different parent materials in three topossequences in the municipality of Pinheiral, RJ. Were described and collected samples of surface horizons (A) and subsurface (B+C) from 14 soils profiles under pasture in three toposequences (T1, T2 and T3), being T1 under basalt, T2 under muscovite-biotite-gneiss and T3 under gabbro. Chemical and physical routine analyses as well as Al and Fe by sulfuric acid attack and X-ray fluorescence, Fed (dithionite-citrate-bicarbonate) and Feo (ammonium oxalate), clay specific surface (SS), clay and oxide mineralogy and remaining phosphorus (Prem), were taken. Variations in the Prem tenors were observed, which related to the nature of parent material, landscape position and soils development degree, which can be analyzed by the chemical, physical and mineralogical variations. The Prem tenors followed the order T2 > T1 = T3 in A horizons and T1 > T3 and T2 ~ T1 e T3 in B+C horizons. Negative correlations between Prem tenors with Fe2O3 (X rays) > Fed > SS > Feo in the A horizon and with Fe2O3 (sulfuric acid) > Fe2O3 (X rays) > clay > Fed > Feo in the B+C horizons, were observed. The principal components and hierarchical clustering analysis contributed to the joi
Este trabalho teve o objetivo de avaliar os teores do fósforo remanescente e correlacioná-los com os atributos químicos, físicos e mineralógicos em horizontes de solos formados a partir de diferentes materiais de origem em três topossequências no município de Pinheiral, RJ. Foram descritos e coletadas amostras de horizontes superficiais (A) e subsuperficiais (B+C) de 14 perfis de solos sob pastagem em três topossequências (T1, T2 e T3), sendo T1 sob basalto, T2 sob muscovita-biotita-gnaisse e T3 sob gabro. Foram realizadas as análises químicas e físicas de rotina, bem como Al e Fe pelo ataque sulfúrico e fluorescência de raios X, Fed (ditionito-citrato-bicarbonato de sódio) e Feo (oxalato ácido de amônio), superfície específica da argila (SE), mineralogia da argila e óxido, e fósforo remanescente (Prem). Variações dos teores de Prem foram observadas, as quais relacionadas à natureza do material de origem, posição na paisagem e grau de desenvolvimento dos solos, o que pode ser analisado pelas variações dos atributos químicos, físicos e mineralógicos. Os teores de Prem seguiram a ordem T2 > T1 = T3 no horizonte A e da T1 > T3 e T2 ~ T1 e T3 nos horizontes B+C. Foram observadas correlações negativas entre os teores de Prem com Fe2O3 (raios X) > Fed > SE > Feo nos horizontes A e com Fe2O3 (ataque sulfúrico) > Fe2O3 (raios X) > argila > Fed > Feo nos horiz
ABSTRACT
This work aimed to evaluate the remaining phosphorus tenors and correlate with the chemical, physical and mineralogical attributes in soils horizons developed from different parent materials in three topossequences in the municipality of Pinheiral, RJ. Were described and collected samples of surface horizons (A) and subsurface (B+C) from 14 soils profiles under pasture in three toposequences (T1, T2 and T3), being T1 under basalt, T2 under muscovite-biotite-gneiss and T3 under gabbro. Chemical and physical routine analyses as well as Al and Fe by sulfuric acid attack and X-ray fluorescence, Fed (dithionite-citrate-bicarbonate) and Feo (ammonium oxalate), clay specific surface (SS), clay and oxide mineralogy and remaining phosphorus (Prem), were taken. Variations in the Prem tenors were observed, which related to the nature of parent material, landscape position and soils development degree, which can be analyzed by the chemical, physical and mineralogical variations. The Prem tenors followed the order T2 > T1 = T3 in A horizons and T1 > T3 and T2 ~ T1 e T3 in B+C horizons. Negative correlations between Prem tenors with Fe2O3 (X rays) > Fed > SS > Feo in the A horizon and with Fe2O3 (sulfuric acid) > Fe2O3 (X rays) > clay > Fed > Feo in the B+C horizons, were observed. The principal components and hierarchical clustering analysis contributed to the joi
Este trabalho teve o objetivo de avaliar os teores do fósforo remanescente e correlacioná-los com os atributos químicos, físicos e mineralógicos em horizontes de solos formados a partir de diferentes materiais de origem em três topossequências no município de Pinheiral, RJ. Foram descritos e coletadas amostras de horizontes superficiais (A) e subsuperficiais (B+C) de 14 perfis de solos sob pastagem em três topossequências (T1, T2 e T3), sendo T1 sob basalto, T2 sob muscovita-biotita-gnaisse e T3 sob gabro. Foram realizadas as análises químicas e físicas de rotina, bem como Al e Fe pelo ataque sulfúrico e fluorescência de raios X, Fed (ditionito-citrato-bicarbonato de sódio) e Feo (oxalato ácido de amônio), superfície específica da argila (SE), mineralogia da argila e óxido, e fósforo remanescente (Prem). Variações dos teores de Prem foram observadas, as quais relacionadas à natureza do material de origem, posição na paisagem e grau de desenvolvimento dos solos, o que pode ser analisado pelas variações dos atributos químicos, físicos e mineralógicos. Os teores de Prem seguiram a ordem T2 > T1 = T3 no horizonte A e da T1 > T3 e T2 ~ T1 e T3 nos horizontes B+C. Foram observadas correlações negativas entre os teores de Prem com Fe2O3 (raios X) > Fed > SE > Feo nos horizontes A e com Fe2O3 (ataque sulfúrico) > Fe2O3 (raios X) > argila > Fed > Feo nos horiz