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objeto de conferencia

Dendrochronological laboratory for studies relate to ENSO events in the tropical zone of South-America

Publicado por
Rodriguez, Rodolfo, Mabres, Antonio, Flores, Luis, Woodman Pollitt, Ronald Francisco, Luckman, Brian H.

Publicado 1999

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 cr...

artículo

Six hundred years of South American tree rings reveal an increase in severe hydroclimatic events since mid-20th century

Publicado por
Morales, Mariano S., Cook, Edward R., Barichivich, Jonathan, Christie, Duncan A., Villalba, Ricardo, LeQuesne, Carlos, Srur, Ana M., Ferrero, M. Eugenia, Gonzalez-Reyes, Alvaro, Couvreux, Fleur, Matskovsky, Vladimir, Aravena, Juan C., Lara, Antonio, Mundo, Ignacio A., Rojas, Facundo, Prieto, Maria R., Smerdon, Jason E., Bianchi, Lucas O., Masiokas, Mariano H., Urrutia-Jalabert, Rocio, Rodriguez-Caton, Milagros, Munoz, Ariel A., Rojas-Badilla, Moises, Alvarez, Claudio, Lopez, Lidio, Luckman, Brian H., Lister, David, Harris, Ian, Jones, Philip D., Williams, A. Park, Velazquez, Gonzalo, Aliste, Diego, Aguilera-Betti, Isabella, Marcotti, Eugenia, Flores, Felipe, Munoz, Tomas, Cuq, Emilio, Boninsegna, Jose A.

Publicado 2020

Enlace

South American (SA) societies are highly vulnerable to droughts and pluvials, but lack of long-term climate observations severely limits our understanding of the global processes driving climatic variability in the region. The number and quality of SA climate-sensitive tree ring chronologies have significantly increased in recent decades, now providing a robust network of 286 records for characterizing hydroclimate variability since 1400 CE. We combine this network with a self-calibrated Palmer Drought Severity Index (scPDSI) dataset to derive the South American Drought Atlas (SADA) over the continent south of 12 degrees S. The gridded annual reconstruction of austral summer scPDSI is the most spatially complete estimate of SA hydroclimate to date, and well matches past historical dry/wet events. Relating the SADA to the Australia-New Zealand Drought Atlas, sea surface temperatures and a...