Lesson 2. Oceanography: Physiography, Salinity, and Currents

This chapter covers the relief of the ocean floor, temperature and salinity distribution, and the monumental drivers of world climate: ocean currents. Classify currents as warm or cold and understand their genesis from planetary winds, the Coriolis effect, and thermohaline circulation. Map-memorization of major currents (e.g., Gulf Stream, Kuroshio, Humboldt) and their effects on adjacent coastlines (fog, desertification, fishing grounds) is essential. Beyond NCERT Class XI, study Goh Cheng Leong’s “Certificate Physical and Human Geography.” For a dynamic understanding, follow news on Arctic Sea ice melt, changes in current patterns, and issues like the “Pacific Garbage Patch” or “coral bleaching” in current affairs compilations.