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The greenhouse effect is a well-known phenomenon: solar rays penetrate the atmosphere (or ozone holes), reflect off the Earth's surface, and are then trapped by gases like carbon dioxide and methane. Excessive emissions of these greenhouse gases lead to a repetitive cycle, resulting in global warming.
A modest increase in global temperature might not drastically alter the climate. However, significant warming triggers a cascade of indirect effects, collectively referred to as climate change. Unlike global warming, which is directly linked to trapped gases, climate change encompasses a broader and more intricate set of phenomena.
Ocean acidification is a prime example of climate change unrelated to global warming. While rising ocean temperatures, shifting salinity levels, and higher sea levels are direct results of a warming planet, the oceans also absorb half of the carbon emitted by human and natural activities. This increased carbon absorption alters the water's acidity, posing a severe threat to marine life, particularly organisms with fragile shells. As John Abraham, a thermal sciences professor at the University of St. Thomas in St. Paul, explains, “We are introducing carbon into the ocean, altering its pH. Is this global warming? Not exactly.”
Take Superstorm Sandy in 2012, for instance—were such extreme storms a result of global warming or climate change? Many experts argue that Sandy was directly influenced by global warming. Rising temperatures increase evaporation, adding more moisture to the atmosphere, warming ocean waters, and fueling more powerful storms. Additionally, a southward dip in the jet stream from Canada provided extra energy to Sandy, steering it to its eventual landfall. This shift was linked to changes in the North Atlantic Oscillation, a pressure system likely altered by melting Arctic ice—itself a consequence of rising temperatures.
“Storms like Sandy are becoming more frequent and severe due to warming,” Abraham explains to Mytour. “However, their impacts are multifaceted: heavier rainfall, increased flooding, and rising sea levels. Many people don’t directly associate phenomena like precipitation with global warming.” This complexity is precisely why scientists favor the term climate change—it captures the intricate and interconnected nature of these systems more accurately.
