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The history of the scientific discovery of climate change began in the early 19th century when ice ages and other natural changes in paleoclimate were first suspected and the natural greenhouse effect was first identified. In the late 19th century, scientists first argued that human emissions of greenhouse gases could change Earth's energy ...
Cooler climate causes Carboniferous rainforest collapse. 251.9. Permian–Triassic extinction event. 199.6. Triassic–Jurassic extinction event, causes as yet unclear. 66. Perhaps 30,000 years of volcanic activity form the Deccan Traps in India, or a large meteor impact. 66. Cretaceous–Paleogene boundary and Cretaceous–Paleogene extinction ...
Climate change can also be used more broadly to include changes to the climate that have happened throughout Earth's history. [38] Global warming—used as early as 1975 [39] —became the more popular term after NASA climate scientist James Hansen used it in his 1988 testimony in the U.S. Senate. [40] Since the 2000s, climate change has ...
Air pollution, in the form of aerosols, affects the climate on a large scale. [ 46][ 47] Aerosols scatter and absorb solar radiation. From 1961 to 1990, a gradual reduction in the amount of sunlight reaching the Earth's surface was observed.
Geologic temperature record. The geologic temperature record are changes in Earth 's environment as determined from geologic evidence on multi-million to billion (10 9) year time scales. The study of past temperatures provides an important paleoenvironmental insight because it is a component of the climate and oceanography of the time.
The global surface temperature (GST) is calculated by averaging the temperatures over sea ( sea surface temperature) and land ( surface air temperature ). Changes in global temperatures over the past century provide evidence for the effects of increasing greenhouse gases. When the climate system reacts to such changes, climate change follows.
Historical climatology is the study of historical changes in climate and their effect on civilization from the emergence of homininis to the present day. This differs from paleoclimatology which encompasses climate change over the entire history of Earth. These historical impacts of climate change can improve human life and cause societies to ...
Climate change may refer to any time in Earth's history, but the term is now commonly used to describe contemporary climate change, often popularly referred to as global warming. Since the Industrial Revolution , the climate has increasingly been affected by human activities .
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