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Values of summer insolation are more important for a region's climate than winter values. This is because the winter phase of a monsoon is always dry. Thus the flora and fauna of a monsoonal climate are determined by the amount of rain that falls during the summer phase of the monsoon. [5]
500 million years of climate change Ice core data for the past 400,000 years, with the present at right. Note length of glacial cycles averages ~100,000 years. Blue curve is temperature, green curve is CO 2, and red curve is windblown glacial dust (loess). Scale: Millions of years before present, earlier dates approximate.
The modern, arid Sahara. The Sahara was not a desert during the African humid period. Instead, most of northern Africa was covered by grass, trees, and lakes. The African humid period (AHP; also known by other names) was a climate period in Africa during the late Pleistocene and Holocene geologic epochs, when northern Africa was wetter than today.
The explosion had effects on climate around the Northern Hemisphere (Southern hemispheric records are less complete), where 1601 was the coldest year in six centuries, leading to a famine in Russia; see Russian famine of 1601–1603.
Name Date tUrn Climate Crisis Awareness and Action Week [182] April 19–23, 2021 Great Backyard Bird Count: 2025 date, February 14–17 Invasive Species Awareness Week [183] Last Week of February Green Office Week: 2016 date, April 18–22 Keep Australia Beautiful Week [184] Last Full Week of August National Green Week
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Climate classifications are systems that categorize the world's climates. A climate classification may correlate closely with a biome classification, as climate is a major influence on life in a region. The most used is the Köppen climate classification scheme first developed in 1884.
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