US Globec and PFEL Research:|
Annual Cycles and Climatologies
The seasonal cycle is our planets largest climate signal, and is the
largest form of environmental change seen in the NEP. Interannual to decadal
and other long-term variations are strongly affected by the seasonal cycle
and may be driven by similar mechanisms to those responsible for the seasonal
evolution of the ocean.
Seasonal climatologies of the observed ocean and atmospheric fields --
such as wind, SST, and subsurface temperature -- and derivatives of these
fields -- such as wind stress curl and mixed layer depth -- are being computed
from the NCEP reanalyses, COADS, and WODB. The spatial texture of the annual
cycles are being analyzed. From these climatologies, we are identifying the
mechanisms that lead to the seasonal evolution of the ocean in the NEP.
We are currently analyzing the relationship between the seasonal evolution
of the NEP and longer term climate shifts. The seasonal cycles of key observed
and modeled upper ocean fields will be related to atmospheric forcing fields,
and compared with the patterns and mechanisms of similar changes in the
interannual and decadal scales, with emphasis on major interannual
(e.g., El Niño and La Niña) events. In addition, these
climatologies are the basis of anomalies and series tendencies that are being
created to describe interannual to decadal environmental variability.
Animations of selected variables
Live Access Server , download climatologies