Browsing by Author "Rodriguez, Rodolfo"
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Item Open Access Dendrochronological laboratory for studies relate to ENSO events in the tropical zone of South-America(Instituto Geofísico del Perú, 1999) Rodriguez, Rodolfo; Mabres, Antonio; Flores, Luis; Woodman Pollitt, Ronald Francisco; Luckman, Brian H.The Collaborative Research Network (CRN) project the assessment of present, past and future climate variability in the Americas from freeline environments, currently under development by institutions of Argentina, Bolivia, Canada, Chile and United State. The goal of this CRN project is the recovery of tree-ring records of past climate from freelines sits along the cordillera between Alaska and Tierra del Fuego. It will be used to reconstruct the major made of interhemispheric climate variability for the past centuries free-ring reconstruction of precipitation and temperature will allow delailed study of local and regional climate variability, how it changes with latitude and is linked to the major elements of ocean and global circulation, through a proposal to the program to expand capacity in the Americas (PESCA) of inter-American Institute for Global change Research (IAI) a very and critical area of South-America has been incorporate to such as studies.Item Restricted Observations of E-region irregularities with ST-Radar in Piura Perú(Instituto Geofísico del Perú, 1993) Woodman Pollitt, Ronald Francisco; Rodriguez, Rodolfo; Balsley, Ben B.During a short period around the first days of february the ST radar located in the campus of the Universidad de Piura, Piura (5°S. 80,5° w), Perú, was pointed in a direction perpendicular to the magnetic field. The goal was to make a quick evaluations of the instrument as a tool to study the E-region at this altitudes. The radar has an antenna of 100m x 100m, with a transmitter with a peak power of 50 kW. A pulse width of 8 usec was used giving a range resolution of 1.2 km. The radar interpulse period was set at 1 msec, given a maximum Nyquist frequency corresponding to a doppler shift of 150 m/sec. The observations lasted several days, but only the last were successful. The first trials were made centered at noon time, influenced by our experience with the E-region echoes at the equator, since this is the time at which the equatorial echoes are the strongest. We obtained no echoes during this trials.Item Open Access Radar atmosférico para estudios científicos en la Antártida(1993) Rodriguez, Rodolfo; Woodman Pollitt, Ronald FranciscoSe explica una de las causas principales de la destrucción de la capa de ozono y se da a conocer el esfuerzo de un grupo de científicos e ingenieros peruanos por contribuir a estudiar este problema, mediante el diseño y construcción de una radar atmosférico "perfilador de vientos", del tipo ST (Troposfera, Estratosfera) y su instalación y operación en la base peruana Machu Picchu (62°05'29"S, 58°28'16"W) en la Antártida. Este radar, que funciona a efecto doppler, utiliza una técnica nueva desarrollada en el Perú considerada como una de las técnicas más poderosas para el estudio de la atmósfera desde tierra.