The heat-trapping nature of carbon dioxide and other gases was demonstrated in the midth century. There is no question that increased levels of greenhouse gases must cause the Earth to warm in response. Ancient evidence can also be found in tree rings, ocean sediments, coral reefs, and layers of sedimentary rocks. This ancient, or paleoclimate, evidence reveals that current warming is occurring roughly ten times faster than the average rate of ice-age-recovery warming. Global Ice Viewer An interactive exploration of how global warming is affecting sea ice, glaciers and continental ice sheets world wide.
Image: The disappearing snowcap of Mount Kilimanjaro, from space. Decreased Snow Cover Satellite observations reveal that the amount of spring snow cover in the Northern Hemisphere has decreased over the past five decades and that the snow is melting earlier.
Sea Level Rise Global sea level rose about 8 inches in the last century. The rate in the last two decades, however, is nearly double that of the last century and is accelerating slightly every year. Quiz: Sea level Test your knowledge of sea level rise with this interactive quiz. Declining Arctic Sea Ice Both the extent and thickness of Arctic sea ice has declined rapidly over the last several decades.
Arctic sea ice extent both affects and is affected by global climate change. Interactive: Global ice viewer An interactive exploration of how global warming is affecting sea ice, glaciers and continental ice sheets worldwide. Extreme Events The number of record high temperature events in the United States has been increasing, while the number of record low temperature events has been decreasing, since The U. How much do you know about how water is cycled around our planet and the crucial role it plays in our climate?
Ocean Acidification Since the beginning of the Industrial Revolution, the acidity of surface ocean waters has increased by about 30 percent. The amount of carbon dioxide absorbed by the upper layer of the oceans is increasing by about 2 billion tons per year. Graphic about how i ncreased greenhouse gases from human activities result in climate change and ocean acidification.
Santer et. Gabriele C. Ramaswamy et. In the s, physicist John Tyndall recognized the Earth's natural greenhouse effect and suggested that slight changes in the atmospheric composition could bring about climatic variations. In , a seminal paper by Swedish scientist Svante Arrhenius first predicted that changes in the levels of carbon dioxide in the atmosphere could substantially alter the surface temperature through the greenhouse effect.
National Academy Press, Washington, D. Levitus, S. NCEI ocean heat content, temperature anomalies, salinity anomalies, thermosteric sea level anomalies, halosteric sea level anomalies, and total steric sea level anomalies from to present calculated from in situ oceanographic subsurface profile data NCEI Accession Version 4.
National Snow and Ice Data Center. Robinson, D. Hall, and T. Boulder, Colorado USA. Fahey, K. Hibbard, D. Dokken, B. Stewart, and T. Maycock eds. Sabine et. The planet's average surface temperature has risen about 1. Not only was the warmest year on record, but eight of the 12 months that make up the year — from January through September, with the exception of June — were the warmest on record for those respective months. An indicator of current global average temperature as measured by NASA; updated annually.
Global Climate Change: Causes. An overview of the greenhouse effect and other contributors to abrupt climate change. Graphic: Global warming from to The oceans have absorbed much of this increased heat, with the top meters about 2, feet of ocean showing warming of more than 0. Climate Kids: What is happening in the ocean? My brothers, why is there a need in the spirit for the lion?
‘Once Upon a Time’ to End With Season 7
Why is not the beast of burden, which renounces and is reverent, enough? To create new values -- that even the lion cannot do; but the creation of freedom for oneself and a sacred "No" even to duty -- for that, my brothers, the lion is needed. To assume the right to new values -- that is the most terrifying assumption for a reverent spirit that would bear much. Verily, to him it is preying, and a matter for a beast of prey. He once loved "thou shalt" as most sacred: now he must find illusion and caprice even in the most sacred, that freedom from his love may become his prey: the lion is needed for such prey.
But say, my brothers, what can the child do that even the lion could not do? Why must the preying lion still become a child? The child is innocence and forgetting, a new beginning, a game, a self-propelled wheel, a first movement, a sacred "Yes. The perspectives of Nietzsche.
Be the last person - Idioms by The Free Dictionary
Man is something that shall be overcome. What have you done to overcome him? All beings so far have created something beyond themselves; and do you want to be the ebb of this great flood and even go back to the beasts rather than overcome man? What is the ape to man? A laughingstock or a painful embarrassment. And man shall be just that for the overman: a laughingstock or a painful embarrassment Behold, I teach you the overman. The overman is the meaning of the earth. Let your will say: the overman shall be the meaning of the earth! I beseech you, my brothers, remain faithful to the earth, and do not believe those who speak to you of otherworldly hopes!
Poison-mixers are they, whether they know it or not. Despisers of life are they, decaying and poisoned themselves, of whom the earth is weary: so let them go. Once the sin against God was the greatest sin; but God died, and these sinners died with him. To sin against the earth is now the most dreadful thing, and to esteem the entrails of the unknowable higher than the meaning of the earth What is the greatest experience you can have?
It is the hour of the great contempt.
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The hour when your happiness, too, arouses your disgust, and even your reason and your virtue. The hour when you say, 'What matters my happiness? It is poverty and filth and wretched contentment.
But my happiness ought to justify existence itself. Does it crave knowledge as the lion his food? As yet it has not made me rage. How weary I am of my good and my evil! All that is poverty and filth and wretched contentment.