Global and Hemispheric Temperature Anomaly (1850-2025)

This dataset provides annual mean temperature anomalies relative to a historical baseline period. It breaks down data by global coverage and hemispheric regions (Northern and Southern). For each observation year, the dataset includes the average anomaly value as well as the 95% confidence interval bounds (upper and lower), offering insight into both the warming trend and the statistical uncertainty of the measurements over nearly two centuries.

Data Quality

High consistency across time series. Numerical data is complete for all years. The 'Code' field is missing for the 'Southern hemisphere' entity, which is a minor data attribution gap but does not affect the primary numerical analysis.

Use Cases

Academic research on global warming, climate trend visualization, environmental policy impact assessment, and training of time-series forecasting models for climate scientists.

Limitations

The dataset lacks high-resolution geographic detail (e.g., country-level anomalies). The specific baseline period (e.g., 1961-1990) used to calculate the anomalies is not explicitly defined within the data columns themselves.

Methodology

The data is likely derived from instrumental records combining land surface air temperatures and sea surface temperatures. These observations are gridded, averaged, and compared against a long-term reference average to produce the anomaly values.