The survival of marshes and other vulnerable coastal regions hinges on the ability to restrict global warming to under 2 degrees Celsius (3.6 degrees Fahrenheit), as outlined in the Paris Agreement. According to a recent study published in Nature, coastal marshlands and coral reef islands may not e
A recent study warns that coastal wetlands, mangroves, and coral reef islands may not adapt quickly enough to keep up with rising sea levels driven by climate change. The survival of these critical ecosystems is largely dependent on limiting global warming to under 2 degrees Celsius, as targeted by the Paris Agreement.
A key finding of the paper is that coastal marshes, mangroves, and reef islands are unlikely to keep pace with rates of sea-level rise that exceed 7 millimeters per year. This rate is likely to occur by the year 2100 in most parts of the world in the absence of major efforts to reduce greenhouse gas emissions.
“Collectively, these are among the most valuable ecosystems on the planet. For example, the world’s fisheries depend to a significant extent on the health of coastal wetlands and coral reefs,” said the study’s co-author Torbjörn Törnqvist, the Vokes Geology Professor in Tulane’s Department of Earth and Environmental Sciences.
“This shows the importance of the Paris Agreement that aims to keep warming within 2 °C and ideally 1.5 °C,” Törnqvist said. “Clearly, this would make a huge difference for coastal ecosystems. However, right now we are on track for 2.4 to 3.5 °C of warming by the end of this century, so a change of course is desperately needed. And this would have to happen very quickly.”
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