This NASA visualization shows sea surface salinity observations (September 2011-September 2014). Students review the video and answer questions.

Explore and connect to the GLOBE Oceans protocol bundle. 

Students review a video showing how the ocean is warmed by solar energy. This is the first video of a four-part series on the water cycle, which follows the journey of water from the ocean to the atmosphere, to the land, and back again to the ocean.

Explore and connect to the GLOBE Water Quality protocol bundle. 

Explore and connect to hydrosphere protocols in GLOBE. Each protocol has related Earth System Data Explorer datasets identified as well.

This investigation is part of the NASA: Mission Geography Module "What are the causes and consequences of climate change?" that guides students through explorations in climatic variability and evidence for global climate change. 

Background information on the El Nino Southern Oscillation or ENSO.