Power spectrum analysis of the time-series of annual mean surface air temperatures |
| |
| Authors: | R P Kane N R Teixeira |
| |
| Institution: | (1) Institute de Pesquisas Espaciais - INPE, C.P. 515, 12201 São José dos Campos SP, Brasil |
| |
| Abstract: | Maximum Entropy Spectral Analysis of the annual mean surface temperature series for land masses and sea in the northern and southern hemispheres indicated long-term linear warming trends of (0.12 to 0.56) °C/century with superposed significant periods in the ranges T = 5–6 yr, 10–11 yr, 15 yr, 20 yr, 28–32 yr, and 55–80 yr. Extrapolation in future indicated for 2000–2030 a departure of (+0.4 °C) above the 1950–70 level. However, for the 1980s, the observed values are above the expected level, probably indicating large greenhouse effects due to human intervention. In that case, our predictions would be underestimates. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
