温度异常值计算器
使用温度异常值计算器计算实际温度与历史平均值的偏差程度。输入观测温度和基准期数据，分析气温异常趋势，追踪全球或区域气候变暖的量化证据。
Temperature Anomaly
1.20 °C
Temperature Anomaly vs Observed Temperature
公式
What Is a Temperature Anomaly?
A temperature anomaly is the difference between an observed temperature and a long-term baseline average for the same location and time period.
Formula
Anomaly = Observed Temperature - Baseline Average
Anomalies are preferred over absolute temperatures for tracking climate change because they remove local biases and allow meaningful comparisons across different locations and elevations.
计算示例
The global mean temperature is observed at 15.2°C against a 20th-century baseline of 14.0°C.
- 01Anomaly = 15.2 - 14.0 = 1.2°C above baseline
- 02In Fahrenheit: 1.2 x 1.8 = 2.16°F above baseline
常见问题
Why use anomalies instead of actual temperatures?
Anomalies remove the effect of location, altitude, and local climate. A station at sea level and one on a mountain can both show +1°C anomaly, meaning both are equally warmer than usual.
What baseline period is typically used?
Common baselines include the 1951-1980 average (NASA) or the 1961-1990 average (WMO). The choice of baseline shifts the values but not the trend.
What is the current global temperature anomaly?
As of the mid-2020s, the global temperature anomaly is approximately +1.2 to +1.5°C above pre-industrial levels (mid-1800s baseline).