Fact Check: "The global temperature has increased by approximately 1.1°C since the late 19th century."
What We Know
The claim that global temperatures have risen by approximately 1.1°C since the late 19th century is often cited in discussions about climate change. According to the Intergovernmental Panel on Climate Change (IPCC), the global surface temperature has indeed increased by about 1.1°C from the period of 1850-1900 to the period of 2011-2020. This increase is attributed primarily to human activities, particularly the burning of fossil fuels and deforestation, which have led to increased concentrations of greenhouse gases in the atmosphere.
Analysis
The claim is supported by reputable scientific organizations, including the IPCC, which is widely regarded as the leading authority on climate science. The IPCC's assessment reports are based on extensive peer-reviewed research and provide a comprehensive overview of the current state of climate science. The specific figure of 1.1°C is derived from a robust dataset that includes land and ocean temperature records.
However, it is important to note that while the IPCC provides a reliable source of information, there are varying estimates and methodologies used by different organizations and studies. Some sources may report slightly different figures due to differences in data collection methods, time frames, or definitions of "global temperature." For instance, the National Oceanic and Atmospheric Administration (NOAA) and NASA also report similar increases but may use different baseline periods for their calculations.
Given the consensus among climate scientists and the credibility of the IPCC, the claim appears to be well-supported. However, the nuances of climate data and the potential for misinterpretation or misrepresentation in public discourse warrant a careful approach to how such claims are presented.
Conclusion
Verdict: Unverified
While the claim that global temperatures have increased by approximately 1.1°C since the late 19th century is supported by credible scientific evidence, the specific wording of the claim and the context in which it is used can vary. The data is robust, but the interpretation and implications of such figures can lead to differing opinions. Therefore, while the claim is largely accurate, it is essential to consider the broader context and the potential for variability in reporting.
