Natural Causes of Climate Change:
1. Increasing Volcano Eruptions
Scientists argue that natural causes have been underestimated. For example, the increasing series of volcano eruption has been altering sea level pressure around the North Atlantic. As a result, a kick-start of ‘chain mechanism’ resulted in El Niño and stronger typhoons that hit tropical countries like the Philippines.
2. Abnormal Solar Fluctuations
Danish Chinese scientists discovered a relationship between Arctic sea ice and solar activity. They discovered that there were solar fluctuations that influenced sea ice over the last 5,000 years. The cause of Artic melting was a natural occurrence and will expand again in the next three decades. In other words, the ice melting is not caused by carbon emission, but solar flares.
3. Medieval Warming & Ice Age
Global warming happened in the past. Between AD 950 and 1250 was the medieval warming. What followed was a “Little Ice Age” (LIA) between 1300 to about 1850. A new study shows Arctic sea ice was actually much less 6,000 years ago. The melting is a natural cyclical phenomenon though others say it is not. British journalist James Delingpole said, “Climate change is the biggest scam… a $1.5 trillion-a-year conspiracy against taxpayers.“
4. Internal Variability
Climate change is also caused by interactions within the system itself. An example is the El Niño–La Niña phenomenon. These patterns repeat itself on a cycle and timescale. Arctic oscillation (AO) affected by air pressure leaves the Arctic either colder or warmer than usual. Other factors to consider are the earth’s orbital changes that affect ocean currents, which affects the global climate.
5. Milankovitch Cycle
Milutin Milankovitch was a Serbian astrophysicist credited for the theory of Milankovitch cycles. These are the small changes in the Earth’s orbit as it circles the Sun. These changes gave rise to the past Ice Ages. The variations of eccentricity, axial tilt, and precession of the earth’s orbit resulted in cyclical variation in the solar radiation reaching the Earth, and that this “orbital forcing” strongly influences the natural climatic changes on earth.
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