Browsing by Author "Flores, Luis"

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    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.
    Palabras clave:RainfallEl NiñoNatural disasters
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    First observations of PMSE in Antártica
    (Ciências espaciais e da atmosfera na Antártica, Transtec Editorial, 1995) Woodman Pollitt, Ronald Francisco; Balsley, Ben B.; Aquino, Freddy; Flores, Luis; Vazquez, Edilberto; Sarango, Martín
    A 50 Mhz radar, with 25 kW average power, has been installed at the Peruvian base in St. George lsland, Antarcitc. A search far PMSE echoes were made during its first year of operatlon, with negative results. These resutts have already been reported In the literature. Here we report our results during the summer of the second year of operation. This time the observations were made starting earlier, closer to the summer solstice. On this occaslon PMSE have been observed, albeit much weaker that what one would expect based on the Poker Flat radar results at comparable latitudes In the Northern Hemlsphere. The asymmetry, therefore, remains. lt is explained in terms of subtle differences in temperatura in the mesopause region of both polar regions. The potential of the technique to monitor global changes n temperatura is discussed.
    Palabras clave:AntarcticaRadarClimate change