Category: Oceans Influence on Climate & Weather

Satellite image of Hurricane Micheal. Image Credit, NOAA.

Ocean Conditions Played a Major Role in the Intensification of Hurricane Michael (2018)

In a recent study published in AGU’s Journal of Geophysical Research – Oceans, scientists at AOML identified key ocean features that supported the rapid intensification of Hurricane Michael (2018), despite unfavorable atmospheric conditions for development. The study demonstrates the importance of using realistic ocean conditions for coupled (ocean-atmosphere) hurricane models in order to achieve the most accurate hurricane intensity forecasts.

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BGC Argo Floats Provide First Year-Round Net Primary Production Estimates for the Western North Atlantic

Phytoplankton drifting near the ocean surface play a critical role in marine biogeochemistry, carbon cycling, and ecosystem health. But measuring the activity of these microscopic organisms is challenging. Although scientists rely on ship-based sampling and satellites to quantify their abundance, both methods have limitations. In a study published recently in the Journal of Geophysical Research-Biogeosciences,* Argo profiling floats equipped with biogeochemical sensors, i.e., BGC Argo floats, were used to obtain the first year-long estimates of phytoplankton in the western North Atlantic Ocean.

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Image Credit: UNESCO

AOML Scientist Contributes to New UNESCO Report on Ocean Carbon

In absorbing carbon dioxide (CO2), the oceans play a crucial role in regulating the climate, a role yet to be fully understood. However, the oceans’ ability to contribute to climate regulation may decline and even be reversed in the future. The oceans that are now the blue lungs of our planet, could end up contributing to global warming.

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Wind streaks and whitecaps on the ocean surface from Hurricane Edouard's 65 kt winds. Image credit: NOAA

Unlocking the ocean’s role driving hurricanes

Scientists at NOAA’s Atlantic Oceanographic and Meteorological Laboratory are now focusing on what happens where the sea meets the atmosphere to help solve the hurricane intensity problem. The place right above where the air meets the sea is called the planetary boundary layer. The ocean drives global weather. By building on past research, scientists have determined that factors in the boundary layer and underlying ocean such as salinity, temperature, currents, wave and wind patterns, precipitation, are crucial to understanding the energy that fuels a hurricane.

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Come Sail Away: Take a Look into a Scientist’s Life Aboard a 6 Week Cruise in the Tropical Atlantic

On February 24, researchers with NOAA’s Atlantic Oceanographic and Meteorological Laboratory returned to land, docking in Key West after nearly six weeks aboard the NOAA ship Ronald H. Brown. The scientists were at sea for the PIRATA (Prediction and Research Moored Array in the Tropical Atlantic) Northeast Extension (PNE) cruise, a joint effort between AOML and NOAA’s Pacific Marine Environmental Laboratory to maintain an expansion of the PIRATA array of surface moorings into the northern and northeastern sectors of the tropical Atlantic.

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An Experimental Outlook Model Shows a Useful Skill for Predicting Seasonal US Tornado Activity

A new paper published in Monthly Weather Review shows some promise for predicting subseasonal to seasonal tornado activity based on how key atmospheric parameters over the US respond to various climate signals, including El Niño and La Niña activity in the Pacific. In this study, a team of researchers from NOAA’s Atlantic Oceanographic and Meteorological Laboratory, Geophysical Fluid Dynamics Laboratory, and Climate Prediction Center presented an experimental seasonal tornado outlook model, named SPOTter (Seasonal Probabilistic Outlook for Tornadoes), and evaluated its prediction skill.

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Hurricane Gliders Return Home from 2020 Season

NOAA’s hurricane gliders are returning home after a successful journey during the 2020 hurricane season. These gliders were deployed off the coasts of Puerto Rico, Dominican Republic, the U.S. Virgin Islands, the Gulf of Mexico, and the eastern U.S. to collect data for scientists to use to improve the accuracy of hurricane forecast models.

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El Nino Satellite Image. Image Credit: NOAA National Environmental Satellite, Data, and Information Service (NESDIS)

The Atlantic Niño: El Niño’s Little Brother

Despite their differences, it is still widely thought that Atlantic Niño is analogous to El Niño in many ways. Specifically, the atmosphere-ocean feedback responsible for the onset of Atlantic Niño is believed to be similar to that of El Niño, a process known as Bjerknes feedback. The near-surface trade winds blow steadily from east to west along the equator. When weaker-than-normal trade winds develop in the western Atlantic basin, downwelling equatorial Kelvin waves propagate to the eastern basin, deepening the thermocline and making it harder for the colder, deeper water to affect the surface.

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AOML Supports the Deployment of Drifting Buoys Ahead of Tropical Storm Isaias

AOML scientists partnered with the U.S. Air Force 53rd Reconnaissance Squadron “Hurricane Hunters” to deploy eight drifting buoys in advance of Tropical Storm Isaias on August 3, 2020 off the Carolina coast, in collaboration with the National Weather Service (NWS), National Hurricane Center (NHC), and Scripps Institution of Oceanography.

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