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#oceanography

6 posts6 participants0 posts today
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bse

"Alvin, the world’s longest-operating and most productive human-occupied deep-sea submersible, with more than 5,000 dives completed over 60 years of operation ... recently underwent a significant upgrade, allowing it to reach depths of up to 6,500 meters—surpassing its previous limit of 4,500 meters." - Eos

eos.org/science-updates/an-upg

Eos · An Upgraded Alvin Puts New Ocean Depths Within ReachBy Kenna Harmony Rubin
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RDN

Over the last 20 years, substantial areas of the oceans have grown darker, most likely as a result of increased algal growth and sediment from runoff. The consequent reduction in the photic depth may affect ecosystems in those regions.

Summary: eurekalert.org/news-releases/1

Original paper: onlinelibrary.wiley.com/doi/10

EurekAlert!Is the ocean getting darker?A study conducted by researchers from the University of Plymouth and Plymouth Marine Laboratory, who have spent more than a decade examining the impact of artificial light at night (ALAN) on the world’s coasts and oceans, has shown that more than one-fifth of the global ocean – an area spanning more than 75million sq km – has been the subject of ocean darkening over the past two decades. Ocean darkening occurs when changes in the optical properties of the ocean reduce the depth of its photic zones, home to 90% of all marine life and places where sunlight and moonlight drive ecological interactions.
#Science#Oceanography#Ecology
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Speckdäne

#idw #Climate Marine heatwaves pose problems for coastal #plankton

Temperatures around the world continue to rise – and the #NorthSea is no exception. Yet, in addition to this gradual #warming, increasingly frequent and intense heat events also have consequences for marine organisms. When heatwaves are added, however, these alterations are amplified. The results have been published in three publications, most recently in #Limnology and #Oceanography.
Link: idw-online.de/en/news852704

idw-online.deMarine heatwaves pose problems for coastal plankton
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The Inquisitive Biologist

149 years ago today, #HMSChallenger returned to Spithead from a scientific expedition that birthed the discipline of #Oceanography, but what did they find? Read more about this in Full Fathom 5000, an engaging book that focuses on the many animals the expedition found in the deep sea.

inquisitivebiologist.com/2024/

Full Fathom 5000
The Inquisitive Biologist · Book review – Full Fathom 5000: The Expedition of HMS Challenger and the Strange Animals It Found in the Deep SeaFocusing on the many animals it found in the deep sea, Full Fathom 5000 provides a novel perspective on the legendary Challenger expedition, all the while treating you to engaging vignettes on scie…
#Books#BookReview#Bookstodon
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Nicole Sharp

Mapping the Mozambique Channel

The Mozambique Channel boasts some of the world’s most turbulent waters, driven by eddies hundreds of kilometers wide. Eddies of this size — known as mesoscale — determine regional flows that influence local biodiversity, sediment mixing, and how plastic pollution moves. To better understand the region, scientists measured a mesoscale dipole from a research vessel.

Illustration of flows in the Mozambique Channel. The anticyclonic ring in dark blue rotates counterclockwise and consists of largely uniform water (labeled Ring: R1). To the south, in green, a cyclonic eddy rotates in a clockwise sense (labeled Cyclone: C1). This area is chlorophyll-rich and has varying salinity levels. Between the two is a filament of chlorophyll-rich water being drawn from the near-shore region (labeled Filament: F1).

The dipole consisted of a large anticyclonic ring (shown in dark blue) that rotated counterclockwise and a smaller cyclonic eddy (shown in green) that rotated clockwise. Between these eddies lay a central jet moving up to 130 centimeters per second that drew material out from the shoreline. In the anticyclonic ring, researchers found largely uniform waters with little chlorophyll. The cyclonic eddy, in contrast, was high in chlorophyll and had large variations in salinity. Those smaller-scale variations, they found, helped to drive vertical motions of up to 40 meters per day.

In situ measurements like these help scientists understand how energy flows through different scales in the ocean and how that energy helps transport nutrients, sediment, and pollution regionally. Such measurements also help us to refine ocean models that enable us to predict this transport and how regions will change as climate patterns shift. (Image credit: ship – A. Lamielle/Wikimedia Commons, eddies – P. Penven et al.; research credit: P. Penven et al.; via Eos)

The research vessel used in the current study, as pictured in 2020.
Illustration of flows in the Mozambique Channel. The anticyclonic ring in dark blue rotates counterclockwise and consists of largely uniform water (labeled Ring R1). To the south, in green, a cyclonic eddy rotates in a clockwise sense (labeled Cyclone C1). This area is chlorophyll-rich and has varying salinity levels. Between the two is a filament of chlorophyll-rich water being drawn from the near-shore region (labeled Filament F1).
#dipole#flowVisualization#fluidDynamics
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MPI für Meteorologie

🚨 📣 #JobAlert 💼 🎓

Do you have an academic degree in #physics, #meteorology, #oceanography, #mathematics, or other related fields?

We are currently looking to fill several exciting positions, from #PhD and #Postdoc to #GroupLeader positions. Check out our current #JobOpenings, we are looking for brilliant and motivated people to join us here in #Hamburg: mpimet.mpg.de/en/career/job-op

mpimet.mpg.deMax-Planck-Institute for Meteorology: Job opportunities
#ScienceJobs#HamburgJobs#academia
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