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Which warming period began after the Little Ice Age ended?

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Line graph showing estimated temperature variations from 1000 to 2000 CE for the Northern Hemisphere and central England, with three lines representing different data sources. The chart highlights the medieval warm period around 1100-1300 and the Little Ice Age from about 1500 to 1850, followed by a sharp temperature rise in the late 20th century. Temperature is shown as deviations from the 1961-1990 average. — Little Ice Age Estimates of temperature variations for the Northern Hemisphere and central England from 1000 to 2000 ce.

The period of warming that began after the Little Ice Age ended is known as the present period of warming, which commenced in the late 19th and early 20th centuries.1

This recent warming trend is characterized by a mix of natural factors and human activities. While some of the warming observed in the 20th century may be attributed to the transition from the Little Ice Age or other natural causes, many climate scientists believe that much of the warming, particularly in the later decades, resulted from the atmospheric accumulation of greenhouse gases, such as carbon dioxide. Instrumental records indicate a substantial global surface temperature rise of 0.9 °C (1.5 °F) between 1880 and 2012, consistent with a warming Earth.23