begin quotes:
Recent
research indicates that the Arctic began warming in the 1830s, making
it one of the first regions, along with the tropical oceans, to show a
detectable temperature increase from human-caused climate change
. This
early warming was a small but measurable signal compared to the natural
climate variability of the time. It would not have been noticeable to
people living then, but was identified by scientists using paleoclimate
data like ice cores, tree rings, and corals.
Key details about the 1830s Arctic temperatures:
- Early onset of global warming: The Industrial Revolution's early rise in greenhouse gas emissions in the 1830s was enough to start warming the climate.
- Higher rate of warming: The Arctic showed the highest rate of warming during this early period, though the total amount was small.
- Emergence from natural variability: The Arctic and tropical oceans were the first regions where the climate emerged from the range of temperatures seen in the pre-industrial centuries.
- Decades before other regions: The warming trend appeared in the Arctic and tropical oceans roughly two decades before it was detected in other parts of the Northern Hemisphere, such as Europe and North America.
- Coming out of the Little Ice Age: This warming occurred toward the end of the Little Ice Age, a colder period that had lasted for centuries.
- Confirmation from climate simulations: While some scientists initially thought the warming could be a rebound from volcanic cooling, climate simulations showed it could be explained by the small rise in greenhouse gases.
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