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Climate Change Essay

878 words - 4 pages

Der Anstieg des Meeresspiegels"Die Wahrheit ist eine unzerstörbare Pflanze. Man kann sie ruhig unter einen Felsen vergraben, sie stößt trotzdem durch, wenn es an der Zeit ist." (Frank Thiess)Dieser Essay soll die fatalen Folgen des Anstiegs des Meeresspiegels für Mensch und Natur aufzeigen und sich mit den Konsequenzen auseinandersetzen.Die zukünftigen Auswirkungen der fortschreitenden globalen Erwärmung scheinen noch sehr unsicher zu sein. Das Ausmaß der Folgen hängt davon ab, welche Mengen an Treibhausgasen wir noch in die Atmosphäre abgeben und welche Temperaturerhöhungen daraus resultieren. Somit spielen das menschliche Verhalten, der technologische Fortschritt und das Bevölkerungswachstum eine große Rolle, wenn es um den Anstieg der Durchschnittstemperatur geht. Zurzeit geht man davon aus, dass sich der Anstieg der Durchschnittstemperatur bis zum Jahr 2100 um 1,1 bis 6,4 °C erhöht(laut IPCC), was wiederrum auch fatale Konsequenzen für die Weltmeere nach sich ziehen würde. Denn als Folge der erhöhten Temperatur in der Atmosphäre würden sich auch die Ozeane erwärmen und der Meeresspiegel würde letztlich ansteigen. In seinem Bericht von 2007 rechnete der IPCC mit einem Anstieg des Meeresspiegels von 18 bis 59 Zentimeter bis zum Jahr 2095. Wenn das nun gering erscheint, so sollte man bedenken, dass der überwiegende Teil des Anstiegs, der durch die bereits erfolgte Erwärmung ausgelöst wird, erst in Zukunft eintreten wird. Am meisten gefährdet sind demnach Menschen, die in Küstenregionen leben, da es zu Überflutungen von Küstengebieten und Inselgruppen kommen wird. Küstenregionen gehören zu den am dichtesten bewohnten Regionen der Erde. Millionenstädte wie Tokio, Shanghai, Mumbai, New York und auch die Inselgruppe der Malediven werden davon stark betroffen sein. Zudem würde es zum Verlust von fruchtbaren Niederungen führen. Kurz gesagt, die zunehmende Erwärmung würde den Wasserkreislauf der Erde intensivieren. Man muss mit einer Zunahme von Dürren, Überschwemmungen und Stürmen rechnen. Die Erwärmung der Meere wird zudem einen großen Einfluss auf die Meerbewohner haben. Vor allem die Versauerung der Ozeane durch den zunehmenden Eintrag von Kohlendioxid könnte folgenreich sein. Denn die durch CO2 gebildete Kohlensäure greift die Skelette der Korallen und die Kalkschalen der Meerestiere an, was auch die Grundlage der Nahrungskette der Meere, Arten des Planktons, treffen würde. Die Auswirkungen des Klimawandels auf die Ökosysteme sind aufgrund ihrer Komplexität und Unerforschtheit, schwer einzuschätzen, allerdings sind sie langfristig sehr bedeutend, wohl auch, weil sie bis jetzt nicht spürbar sind.Nachdem ich nun die Folgen des Meeresspiegelanstiegs dargelegt habe, möchte ich mich jetzt, in Bezug auf das...

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