Climate Change: Global Sea Level 

 Author: Rebecca Lindsey, November 19, 2019 

 

WHAT’S CAUSING SEA LEVEL TO RISE? 

Global warming is causing global mean sea level to rise in two ways. First, glaciers and ice sheets worldwide are melting and adding water to the ocean. Second, the volume of the ocean is expanding as the water warms. A third, much smaller contributor to sea level rise is a decline in the amount of liquid water on land—aquifers, lakes and reservoirs, rivers, soil moisture. This shift of liquid water from land to ocean is largely due to groundwater pumping. 

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