 to natural variability, trends based on short records are very sensitive to the beginning and end dates and do not in general reflect long-term climate trends. As one example, the rate of warming over the past 00 years (00000000; 0.00 [0.00 to 0.00] C per decade), which begins with a strong El Nio, is smaller than the rate calculated since 0000 (00000000; 0.00 [0.00 to 0.00] C per decade)