Sea level rise has already put coastal cities on notice thanks to increasing storm surges and even sunny day flooding at high tide. These challenges will continue to grow because global projections point to a mean sea level rise of at least one foot above year-2000 levels by the end of this century.
However, many cities are facing another factor making them even more vulnerable to rising waters: land subsidence.
The three of us – Pei-Chin Wu, Meng (Matt) Wei and Steven D'Hondt – are scientists at the University of Rhode Island Graduate School of Oceanography working with the U.S. Geological Survey to research challenges facing waterfront cities. Our findings indicate that land is sinking faster than sea levels are rising in many coastal cities throughout the world.
By using radar images of the Earth’s surface collected from orbiting satellites, we measured subsidence rates in 99 coastal cities worldwide. These rates are highly variable within cities and from city to city, but if they continue, many metropolises will experience flooding much sooner than projected by sea level rise models.
Cities in South, Southeast and East Asia are seeing the most rapid rates of subsidence.
Sea level rise has already put coastal cities on notice thanks to increasing storm surges and even sunny day flooding at high tide. These challenges will continue to grow because global projections point to a mean sea level rise of at least one foot above year-2000 levels by the end of this century.
However, many cities are facing another factor making them even more vulnerable to rising waters: land subsidence.
The three of us – Pei-Chin Wu, Meng (Matt) Wei and Steven D'Hondt – are scientists at the University of Rhode Island Graduate School of Oceanography working with the U.S. Geological Survey to research challenges facing waterfront cities. Our findings indicate that land is sinking faster than sea levels are rising in many coastal cities throughout the world.
By using radar images of the Earth’s surface collected from orbiting satellites, we measured subsidence rates in 99 coastal cities worldwide. These rates are highly variable within cities and from city to city, but if they continue, many metropolises will experience flooding much sooner than projected by sea level rise models.
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