On April 8, Tropical Cyclone Harold is a major hurricane, a Category 4 on the Saffir-Simpson Hurricane Wind Scale, as it exits Fiji and heads toward the island of Tonga. NASA used satellite data to calculate the rainfall generated by this powerful and destructive storm in the Southern Pacific Ocean.
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Tropical Cyclone Harold brought heavy rains and hurricane-force winds to Vanuatu and was moving toward Fiji when NASA-NOAA's Suomi NPP satellite provided forecasters with an image of the storm.
One of NASA's satellites that can measure the rate in which rainfall is occurring in storms passed over powerful Tropical Cyclone Harold just after it made landfall in Vanuatu in the Southern Pacific Ocean.
NASA analyzed Tropical Storm Irondro's rainfall and found heaviest rainfall was being pushed far southeast of the center because of strong wind shear.
The oceans help buffer the Earth from climate change by absorbing carbon dioxide and heat at the surface and transporting it to the deep ocean. Using data from two open-ocean research programs at the Bermuda Institute of Ocean Sciences, new research published in Nature Climate Change indicates the North Atlantic Subtropical Mode Water, an upper ocean water mass, is shrinking in a changing climate and becoming a less efficient sink for heat and carbon dioxide.
The Arctic Ocean increasingly resembles the Atlantic, not only regarding its temperature but also the species that live there. However, scientists from the CNRS and Université Laval, Quebec showed that an unprecedented strengthening of Atlantic currents is playing a major role in this phenomenon called 'Atlantification.' The research team studied Emiliania huxleyi, a marine microalgae that typically lives in temperate waters at lower latitudes.
Study by researchers at Brazil's National Disaster Surveillance and Early Warning Center (CEMADEN) also shows a rise in the number of consecutive dry days, suggesting that extreme rainfall events are concentrated in shorter, more widely spaced periods.
NASA-NOAA's Suomi NPP satellite passed over the Southern Pacific Ocean and provided forecasters with a visible image of newly formed Tropical Cyclone Harold. Harold formed near the Solomon Islands and now threatens Vanuatu, which has already issued some warnings.