![]() ![]() This data combined with data from other Saildrones, ocean gliders and aircraft-released sensors is helping NOAA to better represent the conditions that drive hurricanes within forecast models. One uncrewed Saildrone captured the first ever video and measurements at the surface of the ocean during a major hurricane, withstanding 125-mph winds and 50-foot waves during Hurricane Sam. Scientists at NOAA’s Atlantic Oceanographic and Meteorological Laboratory successfully deployed five new extreme weather Saildrones to collect data at the ocean and atmosphere interface in the Caribbean and western tropical Atlantic. (NOAA) NOAA’s hurricane research and observations (NOAA) Video summary of all the named storms that formed during the 2021 Atlantic hurricane season. Video summary of all the named storms that formed during the 2021 Atlantic hurricane season. As to why, Matthew Rosencrans, lead seasonal hurricane forecaster at NOAA’s Climate Prediction Center says, “Climate factors, which include La Niña, above-normal sea surface temperatures earlier in the season, and above-average West African Monsoon rainfall were the primary contributors for this above-average hurricane season.” This season’s storm activity started early and quickly ramped up, as it was the seventh consecutive year with a named storm forming before the official start to the season on June 1, and held the earliest fifth named storm on record. “Their dedication and service are a recognized asset to the nation's resilience to these extreme events.” “The hard-working forecasters at NOAA’s National Weather Service weather and water forecast offices and national centers, along with the National Hurricane Center, provided reliable forecasts and advanced warnings around the clock to safeguard communities in the pathway of destructive storms throughout this active hurricane season,” said National Weather Service Director Louis W. Additionally, the Intergovernmental Panel on Climate Change's Sixth Assessment Report offsite link, released in August 2021, projects with high confidence that the global proportion of tropical cyclones that reach very intense (category 4-5) levels, along with their peak winds and rainfall rates, are expected to increase with climate warming at the global scale. However, the relative contributions of internal variability and aerosols to the observed Atlantic Multidecadal Oscillation remain uncertain. The Atlantic Multidecadal Oscillation is thought to be driven by a combination of internal climate variability and changes over time in small airborne particles, often referred to as aerosols, over the North Atlantic. Scientists attribute the heightened hurricane activity in recent years to the warm phase of the Atlantic Multidecadal Oscillation that began in 1995 and favors more, stronger and longer-lasting storms. This year was the third most active year on record in terms of named storms, it marks the sixth consecutive above-normal Atlantic hurricane season, and this was the first time on record that two consecutive hurricane seasons exhausted the list of 21 storm names. ![]()
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