Over periods of 2-8 years, after removing the overall trend of about 3 millimeters per year, the globally averaged sea-level rise closely follows the waxing and waning of El Niño. The main reason for this close match is that El Niño shifts rainfall from land to ocean, raising sea level. Its opposing phase, La Niña, shifts rainfall to land, causing sea level to drop.
Satellite data on the movement of water on Earth helps to improve the accuracy of moisture maps and forecasts.
The shape of the ground beneath Denman Glacier, which is melting from the bottom up, makes it particularly vulnerable to seawater intrusion.
Greenland and Antarctica are melting—but how quickly and which areas are most affected? Nearly 20 years of satellite data provide key insights into these questions.
The two regions have lost 6.4 trillion tons of ice in three decades; unabated, this rate of melting could cause flooding that affects hundreds of millions of people by 2100.
Sea-level scientists painted a portrait of a changing planet at a major science conference in San Francisco.