12,000 Years Ago, Florida Hurricanes Heated Up Despite Chilly Seas
Previously, Toomey linked turbidites in the Bahamas with modern hurricanes. For this study, the group examined turbidites in cores spanning the shift from the Younger Dryas into the warmer early Holocene, collected offshore the Dry Tortugas, Florida. The turbidites, complete with smashed up shells and jumbled sediments, reveal that in Younger Dryas days Florida was surprisingly hurricane-prone, at a time when cooler sea surface temperatures may have put the brakes on such intense storms elsewhere in the Atlantic.
To explore why, Toomey and colleagues analyzed computer models that simulated ocean and atmospheric conditions near Florida during that period. In modern times, the Atlantic Meridional Overturning Circulation (AMOC) brings cool water south and warm water north. But during the Younger Dryas the AMOC is thought to have weakened considerably, slowing circulation and reshaping environmental conditions across much of the Northern Hemisphere.
Modeling results indicated that lower sea surface temperatures in the tropical Atlantic, near Barbados, for example, corresponded with a drop in storm potential intensity. Near Florida, sea surfaces cooled as well. However, the change there was not as dramatic as further south or to the north. The relative warmth of waters offshore the southeastern U.S. compared to the regional Atlantic, explains Toomey, seems to have set the stage for intense hurricanes near Florida. “The modeling work suggests other factors, such as wind shear and humidity at mid-latitudes, outweighed changes in sea surface temperature at our core site,” he says. Models and geologic records both show that by the early Holocene, as the AMOC regained strength, Florida’s hurricanes subsided.
The results, says Toomey, reveal that when it comes to generating hurricanes, ocean circulation plays a powerful role. What’s more, he adds, the study demonstrates that on certain types of coastlines, turbidites have great potential for unraveling ancient hurricane histories. However, Toomey cautions against applying the results directly to future hurricane activity. He says for that, we need more field data and higher resolution models. “That’s where I see this work headed next.”
Contacts and sources:
Kea Giles
Geological Society of America
Source: http://www.ineffableisland.com/2017/10/12000-years-ago-florida-hurricanes.html
Anyone can join.
Anyone can contribute.
Anyone can become informed about their world.
"United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.
Before It’s News® is a community of individuals who report on what’s going on around them, from all around the world. Anyone can join. Anyone can contribute. Anyone can become informed about their world. "United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.
LION'S MANE PRODUCT
Try Our Lion’s Mane WHOLE MIND Nootropic Blend 60 Capsules
Mushrooms are having a moment. One fabulous fungus in particular, lion’s mane, may help improve memory, depression and anxiety symptoms. They are also an excellent source of nutrients that show promise as a therapy for dementia, and other neurodegenerative diseases. If you’re living with anxiety or depression, you may be curious about all the therapy options out there — including the natural ones.Our Lion’s Mane WHOLE MIND Nootropic Blend has been formulated to utilize the potency of Lion’s mane but also include the benefits of four other Highly Beneficial Mushrooms. Synergistically, they work together to Build your health through improving cognitive function and immunity regardless of your age. Our Nootropic not only improves your Cognitive Function and Activates your Immune System, but it benefits growth of Essential Gut Flora, further enhancing your Vitality.
Our Formula includes: Lion’s Mane Mushrooms which Increase Brain Power through nerve growth, lessen anxiety, reduce depression, and improve concentration. Its an excellent adaptogen, promotes sleep and improves immunity. Shiitake Mushrooms which Fight cancer cells and infectious disease, boost the immune system, promotes brain function, and serves as a source of B vitamins. Maitake Mushrooms which regulate blood sugar levels of diabetics, reduce hypertension and boosts the immune system. Reishi Mushrooms which Fight inflammation, liver disease, fatigue, tumor growth and cancer. They Improve skin disorders and soothes digestive problems, stomach ulcers and leaky gut syndrome. Chaga Mushrooms which have anti-aging effects, boost immune function, improve stamina and athletic performance, even act as a natural aphrodisiac, fighting diabetes and improving liver function. Try Our Lion’s Mane WHOLE MIND Nootropic Blend 60 Capsules Today. Be 100% Satisfied or Receive a Full Money Back Guarantee. Order Yours Today by Following This Link.
| Visits: | 1,825,374,353 |
| Stories: | 8,676,549 |
Whistler Blowers, Insiders
