When the world’s climate experiences hiccups
Throughout the Quaternary period, the Earth experienced several ice ages and warm periods, resulting in significant climate variability. Ice cores from Greenland have provided researchers with detailed data about the last glacial period 100,000 years ago, revealing rapid temperature increases and fluctuations known as “climate hiccups.”
Research has shown that these temperature fluctuations, known as Dansgaard-Oeschger events, also occurred during the penultimate glacial period, 135,000 to 190,000 years ago. Isotopic measurements on stalagmites from the Sofular Cave in Turkey have provided evidence of these events, proving that they also occurred during earlier glacial periods. Although these events occurred with less frequency during the penultimate glacial period, their discovery sheds light on the variations between different glacial periods and warm periods.
The North Atlantic has been identified as a key region for these fluctuations, with ocean circulation playing a significant role in driving the changes. The weakened circulation during the penultimate glacial period resulted in longer intervals between Dansgaard-Oeschger events, indicating a different pattern than the last glacial period.
Comparing data from stalagmites with marine sediment cores has provided a more accurate picture of past climate variations, enabling a better understanding of the Earth’s mechanisms and the factors that drive abrupt climate fluctuations. These evaluations also help to refine climate models and improve our understanding of future climate trends.
Researchers hope to continue their analysis in order to answer remaining questions and establish a more comprehensive understanding of past climate variability. By doing so, they aim to refine climate models and gain insights into future climate trends.