For the period 1993 to 2003, the Levitus et al. (2005a) analysis has a linear global ocean trend of 0.42 ± 0.18 W m — 2, Willis et al. (2004) has a trend of 0.66 ± 0.18 W m — 2 and Ishii et al. (2006) a trend of 0.33 ± 0.18 W m — 2. (ipcc.ch)
For the period 1993 to 2003, the Levitus et al. (2005a) analysis has a linear global ocean trend of 0.42 ± 0.18 W m — 2, Willis et al. (2004) has a trend of 0.66 ± 0.18 W m — 2 and Ishii et al. (2006) a trend of 0.33 ± 0.18 W m — 2. (ipcc.ch)
This demonstrates how longer periods of observation, along with the complete ARGO network, are critical to derive more accurate long - term ocean trends. (skepticalscience.com)