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Main Author:	Álvaro González-Reyes
Format:	Artículo científico
Language:	es
Published:	Pontificia Universidad Católica de Chile 2016
Subjects:	Geografía Social Precipitación Chile Central Santiago de Chile Ocurrencia de sequías
Online Access:	https://www.redalyc.org/articulo.oa?id=30048478002
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Ocurrencia de eventos de sequías en la ciudad de Santiago de Chile desde mediados del siglo XIX Álvaro González-Reyes Geografía Social Precipitación Chile Central Santiago de Chile Ocurrencia de sequías Registros instrumentales extensos de precipitación son de amplia utilidad ya que permiten evaluar el comportamiento de eventos extremos como las sequías a múltiples escalas temporales. La ciudad de Santiago de Chile posee un registro histórico desde el año 1867, siendo uno de los más antiguos y completos de América del Sur. En este estudio se analizó la ocurrencia de sequías defi nidas por umbrales de precipitación (moderadas, severas y extremas), considerando los meses de abril - octubre entre los años 1867 - 2015. Los resultados muestran un incremento en la ocurrencia de toda clase de sequías desde 1930, y un incremento de sequías consecutivas de 2 a 4 años sin precedentes dentro del periodo instrumental. En adición, un incremento de sequías extremas ha sido registrada desde el año 1950 en los meses de mayo a julio, revelando condiciones invernales más secas para la ciudad de Santiago. 2016 artículo científico 0379-8682 https://www.redalyc.org/articulo.oa?id=30048478002 es http://www.redalyc.org/revista.oa?id=300 Revista de Geografía Norte Grande application/pdf Pontificia Universidad Católica de Chile Revista de Geografía Norte Grande (Chile) Num.64

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// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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