  In this paper, we analyze the sea surface temperature obtained from the
global drifter program. The experimental Fourier power spectrum shows a
two-decade power-law behavior as $E_{\theta}(f)\propto f^{-7/3}$ in the
frequency domain. Dimensional argument suggests a two-dimensional-like
Lagrangian forward cascade, in which the enstrophy dissipation
$\epsilon_{\Omega}$ is involved. Using the Hilbert-Huang transform and
multi-level segment analysis, the measured high-order statistics and the
corresponding singularity spectrum confirm the existence of the intermittency
with a measured intermittency parameter $\mu_{\theta}\simeq0.10$, which is much
weaker than the prediction by the conventional structure function method.
