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Approximately 505,000 km 3 (121,000 cu mi) of water falls as precipitation each year, 398,000 km 3 (95,000 cu mi) of it over the oceans. [10] [15] The rain on land contains 107,000 km 3 (26,000 cu mi) of water per year and a snowing only 1,000 km 3 (240 cu mi). [15] 78% of global precipitation occurs over the ocean. [11]
Social cycle theories are among the earliest social theories in sociology. Unlike the theory of social evolutionism , which views the evolution of society and human history as progressing in some new, unique direction(s), sociological cycle theory argues that events and stages of society and history generally repeat themselves in cycles.
For Earth's current orbital eccentricity, incoming solar radiation varies by about 6.8%, while the distance from the Sun currently varies by only 3.4% (5.1 million km or 3.2 million mi or 0.034 au). [11] Perihelion presently occurs around 3 January, while aphelion is around 4 July.
The Juglar cycle is a fixed investment cycle of 7 to 11 years identified in 1862 by Clément Juglar. [1] Within the Juglar cycle one can observe oscillations of investments into fixed capital and not just changes in the level of employment of the fixed capital (and respective changes in inventories), as is observed with respect to Kitchin cycles. 2010 research employing spectral analysis ...