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Whether current global climate patterns are human induced or not, climate change

does takes place and weather patterns can help us anticipate climate trends. Climate change is the deviation of mean global temperature by as few as one or two degrees Celsius. Spatial variability is greater than the change itself, so the melting of glaciers and rising sea levels don't equate to extreme shifts in temperature at all locations.
Scientists use stable isotopes concentrations, trapped in glacial deposits, to calculate historical ice volume. Lighter isotopes are more reactive and get trapped in ice through atmospheric transport. When ice volume decreases, we see elevated concentrations of lighter isotopes in our oceans. Although today we have rather high sea levels and elevated concentrations of lighter stable isotopes in our oceans, it arguably has as much to do with climate change as it does with continental drift or any other factor. When a considerable land mass is located near the North and South Poles, we would expect more ice to accumulate.
Another way to measure climate change lies in the study of modes of variability. We study geographic locations and how climate patterns fluctuate over a specific timeframe. An example of this is the study of as El-Nino Southern Oscillation (ENSO) cycles. (ENSO) cycles are characterized by Southern Pacific sea surface temperatures and associated pressure gradient across the Pacific Ocean. During warming trends, evaporation is amplified - the possible cause for flooding and increased storm frequency in the Eastern Pacific. Inversely, when Southern Pacific sea surface temperatures are cooler than expected, we experience drought.
Beyond the experienced mode itself leaves a field of research on the severity and frequency of these events. It is at best a hypothesis, but a popular belief is that ENSO cycles are amplified during periods of increased climate change. Extreme weather patterns might just be another sign that our climate is very likely to evolve in the near future.
References:
https://en.wikipedia.org/wiki/Dust_Bowl
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