Fig. 1.13 Geothermal heat flux based on a semi-empirical formula; seafloor shallower than 2.6 km is excluded (mW/m2). See color plate section.

ridges, away from the ridges the contribution of geothermal heat flux is mostly limited to the abyssal ocean.

1.2 Temperature, salinity, and density distribution in the world's oceans

The study of the oceanic circulation must start by building a clear mental picture of the physical conditions in the ocean, because water property distribution in the world's oceans is a result of the circulation system in response to the surface forcing described in the previous section. This section serves as a brief introduction to descriptive large-scale oceanography.

1.2.1 Surface distribution of temperature, salinity, and density

Sea surface temperature is closely related to the air-sea heat fluxes discussed in the previous section. In fact, there is a strong negative feedback between sea surface temperature and air-sea heat fluxes, i.e., a positive sea surface temperature anomaly induces more evaporation, sensible heat loss, and long-wave radiation, which tend to reduce the positive temperature anomaly. On the other hand, a negative sea surface temperature anomaly reduces evaporation, sensible heat loss, and outgoing long-wave radiation, and thus pushes sea

Was this article helpful?

0 0

Post a comment