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dredmorbius@joindiaspora.com
Doc Morbius (moved to Glasswings)

Tropical Storm Ida forms, could strike Louisiana as Category 2 hurricane

Tropical Storm Ida is expected to make landfall on the Louisiana coast at Grand Isle as a strong Category 2 hurricane Sunday afternoon, pushing the Gulf of Mexico into coastal areas and dropping extremely heavy rain far inland. The storm will then head north and northeast towards Baton Rouge and Monroe.

It's the most serious weather threat to Louisiana of the 2021 Atlantic Basin hurricane season, after a record-breaking 2020 that saw four named storms - including Category 4 Hurricane Laura - strike the state. It's predicted landfall would bring it ashore on the 16th anniversary of Hurricane Katrina, the costliest storm in U.S. history.

https://www.nola.com/news/hurricane/article_0dd9a3d8-06a3-11ec-8b3e-ef7a2e559634.html

Tropical Storm Ida is forecast to arrive at New Orleans, LA about noon--2pm Sunday (local time), at hurricane strength.

The cone of probability is relatively narrow, though landfall locations could still vary considerably. Intensity is likely to be high given high Gulf sea temps.

Louisiana is also seaing an all-time peak Covid infection rate.

US National Hurricane Center:
https://www.nhc.noaa.gov/refresh/graphics_at4+shtml/234304.shtml?cone#contents

Ida looks to be slow-moving and will remain over or upstream of New Orleans for 18--48 hours, with rain intensities of an inch an hour (25.4 mm/hr), which could be over 18--36 in (500 -- 1000mm) of rain.

Nullschool Arrival Forecast at noon CST, with 968 hPa, winds are hard to say (Nullschool's forecasts run low, stated is 70 mph, could exceed 110 mph), and 97mm/3hr rain (3.83 in/3hr). I also don't get storn surge, though the eye looks as if it may pass very slightly west of NoLa, which means that the storm surge on the east of the city will be amplified.

This could be a major storm.

There does not appear to be any other Atlantic tropical storm threat at this time.

#TropicalStorms #Hurricane #HurricaneIda #NewOrleans #covid19 #noaa #weather #NoaaNHC

Tropical Storm Ida forms, could strike Louisiana as Category 2 hurricane

Landfall expected Sunday, pushing Gulf into coastal areas with extremely heavy rain far inland

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petapixel@xn--y9azesw6bu.xn--y9a3aq
petapixel (unofficial)

Beautiful New Species of Jellyfish Photographed 2,300 Feet Under the Sea

image

As part of a 2021 North Atlantic Stepping Stones expedition, what is called a potentially "unknown" or "undescribed" red jellyfish in the genus Poralia was captured on camera. The disk-shaped red jellyfish was found floating nearly 2,300 feet below the surface.

An "undescribed" species is the term scientists use to classify a creature that has never received a specific name in a formal scientific publication and is, therefore, previously unknown to scientists.

Quinn Girasek, an intern and National Oceanic and Atmospheric Administration (NOAA) Hollings Scholar with the NOAA Ocean Exploration organization describes the find as part of her role annotating the water column dive that took place in late July.

"As a Hollings intern, I am conducting research to further our understanding of previously unexplored ocean habitats," she explains. "My project this summer focuses on the abundance of organisms within the mesopelagic, or twilight zone (200 to 1,000 meters/ 656 to 3,281 feet depth) in the Atlantic Ocean around the Gulf Stream and within the deep scattering layer."

The red jellyfish is one of the species that Girasek cataloged as part of her research. This beautiful red creature in the genus Poralia is described as one that may be a previously unknown species and was seen during the third transect of Dive 20 of the 2021 North Atlantic Stepping Stones expedition, at a depth of 700 meters (2,297 feet).

<https://petapixel.com/assets/uploads/2021/08/ex2104-dive20-redjelly-640x360-1.mp4>

"Overall, a variety of animals were seen, like ctenophores, cnidarians, crustaceans, and Actinopterygii (ray-finned fishes). We also saw several undescribed families and potential new species," she continues.

In the image below, the remotely operated vehicle (ROV) Deep Discoverer is shown collecting the potentially new species of jellyfish, which also gives a sense of scale to the creature. For reference, the ROV is 10 feet long, 6.5 feet wide, and 8.5 feet tall.

A total of four samples were collected during Dive 20 of the 2021 North Atlantic Stepping Stones expedition using the suction sample on remotely operated vehicle (ROV) Deep Discoverer. Here, Global Foundation for Ocean Exploration ROV pilots deftly maneuver to collect a potential new species of jellyfish during the 1200-meter (3,937-foot) dive transect.

Deep Discoverer is capable of diving to a depth of 3.7 miles (6,000 meters) and can capture high-definition video and uses a set of 20 LED lights to fire 150,000 lumens of light into the darkness of the ocean's depths.

The final dive of the 2021 North Atlantic Stepping Stones expedition was dedicated to the exploration of the water column within Hydrographer Canyon through two series of transects. The first series involved transects at depths of 300, 500, 700, and 900 meters (984, 1,640, 2,297, and 2,953 feet) and the second series started with a transect within the bathypelagic or midnight zone of the ocean at 1,200 meters (3,937 feet) depth and was followed by a transect at a depth of 630 meters (2,067 feet), within the area’s "deep scattering layer" (DSL). The DSL is a region in the water column where there is such a high density of marine organisms that they generate their own sonar signal.

The "deep scattering layer" is a term used by those using active acoustics in the open ocean as a phenomenon that occurs between about 400 and 600 meters (1,312 to 1,969 feet) depth in our geographic region of study. As described by NOAA Hollings Undergraduate Scholar Herbert Leavitt, typically this layer is seen when the sound waves come into contact with a high density of mesopelagic fish or other organisms that live at depth during the day and migrate towards the surface at night to feed.

Many other creatures were observed during the expedition, and while the red jellyfish is the only one that is called out as "undescribed" or undiscovered, there are a host of others that can be seen in detail in images and video from the NOAA.

_Image and video credits: Video and images courtesy of NOAA Ocean Exploration, 2021 North Atlantic Stepping Stones: New England and Corner Rise Seamounts. _

#features #news #atlanticocean #deep #deepsea #discovered #dive #gulfstream #jellyfish #nationaloceanicandatmosphericadministration #newdiscovery #newspecies #noaa #ocean