Table 1. Linear trends and the corresponding confidence levels of energy components of the Lorenz energy cycle of the global atmosphere 1979–2013.
| Energy component | NCEP-DOE R2 | ERA-Interim | ||
|---|---|---|---|---|
| Trend | Confidence | Trend | Confidence | |
| PM (J m−2 per year) | −655.5±1662.6 | <70% | −955.6±1579.3 | <70% |
| PE (J m−2 per year) | 755.5±391.5 | 96.4% | 571.6±433.2 | 90.3% |
| KM (J m−2 year−1) | 83.5±423.2 | <70% | 378.8±485.6 | <70% |
| KE (J m−2 per year) | 1259.5±480.0 | 99.2% | 362.1±304.5 | 87.8% |
| Total E (J m−2 per year) | 1143.1±2066.9 | <70% | 396.9±1843.6 | <70% |
| C(PM, PE) (10−3 W m−2 per year) | 2.2±1.2 | 96.0% | 2.0±1.2 | 94.1% |
| C(PE, KE) (10−3 W m−2 per year) | 11.2±4.9 | 95.8% | 2.7±1.5 | 96.0% |
| C(KE, KM) (10−3 W m−2 per year) | 0.8±0.5 | 91.2% | 0.6±0.5 | 86.5% |
| C(PM, KM) (10−3 W m−2 per year) | 7.6±3.6 | 95.3% | 2.2±1.0 | 97.4% |
| G(PM) (10−3 W m−2 per year) | 9.2±4.8 | 94.8% | 3.8±2.0 | 93.4% |
| G(PE) (10−3 W m−2 per year) | 8.9±4.8 | 93.4% | 1.0±0.8 | 81.3% |
| D(KM) (10−3 W m−2 per year) | 7.6±4.4 | 92.3% | 3.0±1.4 | 96.5% |
| D(KE) (10−3 W m−2 per year) | 10.3±5.6 | 94.4% | 2.0±1.5 | 87.2% |
ERA-Interim, European Centre for Medium-Range Weather Forecasts Re-Analysis Interim; NCEP-DOE R2, National Centers of Environmental Prediction and the Department of Energy Reanalysis II.
Note: The corresponding confidence levels (that is, the probabilities of linear trends with a non-zero slope) are estimated by the Student's t-statistics (please see Methods). The linear trends with confidence levels >90%, between 80 and 90%, and <70% are highlighted in blue, yellow and black colours, respectively.