Base de dados : LILACS
Pesquisa : G16.500.175.249 [Categoria DeCS]
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Id: biblio-987191
Autor: Pazos, Enrique.
Título: Simulación del flujo de viento sobre el territorio de Guatemala utilizando un modelo climático regional / Simulation of wind flux over the Guatemala territory usingaregional climate model
Fonte: Cienc. tecnol. salud;5(2):162-171, 2018. ilus.
Idioma: es.
Resumo: Se presenta un análisis de la circulación del viento en la vecindad de la superficie terreste, para una región centrada alrededor de Guatemala. Para tal fin se utilizó el modelo climático regional (RegCM), con el cual se simuló la dinámica atmosférica sobre dicha región durante todo el 2016. El propósito del estudio es obtener la variación de mesoescala (decenas de kilómetros) del campo de velocidad del viento. Se puede observar que a medida que la resolución se incrementa se obtiene una representación más precisa de los detalles y características de la topografía del terreno, la cual influye en los patrones de circulación del viento a escalas de pocos kilómetros. Con una resolución fina de2km es posible observar zonas de flujo intenso de viento sobre la superficie; como en Palín, Escuintla. También se logra ver la presencia de patrones de circulación diurna que son producto del ciclo diario de calentamiento del terreno debido al sol y el consecuente enfriamiento durante la noche. Este es el primer reporte de una línea de estudio en donde se planea analizar las características climáticas propias de la región guatemalteca.

We present an analysis of the wind circulation in the vecinity of the ground surface, for a region centered around Guatemala. We used the regional climate model RegCM to simulate the atmospheric dynamics above that region during the full year 2016. The purpose of the study is to obtain the mesoscale variation (tens of kilometers) of the wind velocity field. It can be seen that as resolution is increased, the details in topography are better represented, they in turn influence the wind circulation patterns on scales of a few kilometers. With a fine resolution of 2 km it is possible to confirm the existence of intense wind flux zones over the surface; such as Palín, Escuintla. We are also able to observe diurnally varying circulations, which are the product of the daily cycle of terrain heating due to the sun and the subsecuent cooling during the night. This is the first report in a line of studies where we plan to analyze the climatic features of the Guatemalan region.
Descritores: Vento
Movimentos do Ar
Energia Eólica
Responsável: GT49.1


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Fotocópia
Id: lil-456502
Autor: Pierce, R. H; Henry, M. S; Blum, T. C; Mueller, E. M.
Título: Aerial and tidal transport of mosquito control pesticides into the Florida Keys National Marine Sanctuary
Fonte: Rev. biol. trop;53(supl.1):117-125, maio 2005. tab, mapas.
Idioma: en.
Resumo: This project was undertaken as the initial monitoring program to determine if mosquito adulticides applied along the Florida Keys cause adverse ecological effects in the Florida Keys National Marine Sanctuary (FKNMS). The study monitored the distribution and persistence of two mosquito adulticides, permethrin and dibrom (naled), during three separate routine applications by the Florida Keys Mosquito Control District. The approach was to determine if toxic concentrations of the pesticides entered the FKNMS by aerial drift or tidal transport. The amount of pesticide entering the FKNMS by way of aerial drift was monitored by collection on glass fiber filter pads, set on floats in a grid pattern on either side of the FKNMS. Permethrin was recovered from filter pads on the leeward side for each of the three applications, ranging from 0.5 to 50.1 microg/m(2) throughout the study. Tidal current transport was monitored by collection of surface and subsurface water samples at each grid site. Tidal transport of naled and dichlorvos (naled degradation product) was apparent in the adjacent waters of the FKNMS. These compounds were detected in subsurface, offshore water at 0.1 to 0.6 microg/1, 14 hr after application. Permethrin was not detected in offshore water samples; however, concentrations ranging from 5.1 to 9.4 microg/l were found in surface water from the canal system adjacent to the application route. Comparison of the observed environmental concentrations with toxicity data (permethrin LC-50, 96 hr for Mysidopsis bahia = 0.02 microg/l) indicated a potential hazard to marine invertebrates in the canals with possible tidal transport to other areas
Descritores: Movimentos do Ar
Inseticidas/análise
Naled/análise
Permetrina/análise
Água do Mar/química
Movimentos da Água
-Diclorvós/efeitos adversos
Diclorvós/análise
Diclorvós/toxicidade
Monitoramento Ambiental
Cromatografia Gasosa-Espectrometria de Massas
Inseticidas/efeitos adversos
Inseticidas/toxicidade
LETHAL DOSE ACADEMIES AND INSTITUTES
Naled/efeitos adversos
Naled/toxicidade
Permetrina/efeitos adversos
Permetrina/toxicidade
Limites: Animais
Tipo de Publ: Research Support, U.S. Gov't, Non-P.H.S.
Responsável: BR1.1 - BIREME



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