Archived ocean observations help create new data set for climate models
By Summit Voice
SUMMIT COUNTY — A new set of more complete sea surface temperature data has helped scientists explain a gradual, decades-long slowdown of a key tropical atmospheric circulation, linking it with the steady increase in global temperatures during the past few decades.
“Our experiments show that the main driver of the change in the Walker circulation is the gradual change that has taken place in the surface temperature pattern toward a more El Niño-like state,” said Hiroki Tokinaga, associate researcher at the International Pacific Research Center, University of Hawaii at Manoa. “We don’t have enough data yet to say to what degree the slowdown over the last 60 years is due to a rise in man-made greenhouse gases or to natural cycles in the climate,” Tokinaga said.
Shifts in currents and winds also affecting sea level, with potential impacts in low-lying coastal zones
By Summit Voice
SUMMIT COUNTY — Colorado scientists who teamed up to study rising sea levels say some low-lying areas in the Pacific could be hit especially hard as global temperatures continue to climb. Because of complex patterns of ocean currents and winds, sea level is actually falling slightly in other areas, the researchers concluded.
The study, led by scientists at the University of Colorado at Boulder and the National Center for Atmospheric Research, also in Boulder, finds that the sea-level rise is at least partly a result of climate change. The changes are especially intense along the coastlines of the Bay of Bengal and the Arabian Sea, as well as the islands of Sri Lanka, Sumatra and Java, the research found.