Oceanography News

Courtesy of Science Daily

Welcome to Sea and Sky's Oceanography News. Here you can find links to the latest ocean news headlines in the topic of oceanography. Click on any yellow title below to view the full news article. The news article will open in a new browser window. Simply close the browser window when you are finished reading the article to return to the news article listing. You can use the "Click for More" link to go to a page with more news headlines.

 

Researchers find climate change and turf seaweed causing 'patchy' seascape
Researchers find environmental developments caused by climate change are contributing to the transformation of the seafloor to a lower, more patchy seascape dominated by shrub-like seaweed which could impact species habitats and the structure of the food web.
Publ.Date : Thu, 14 Nov 2019 16:19:14 EST

Going with the floe: Sea ice movements trace dynamics transforming the new Arctic
Scientists have used MODIS satellite imagery to understand long-term ocean movements from sea ice dynamics. The engineers used image-processing algorithms to remove clouds, sharpen details, and separate individual floes. Image analysis algorithms mapped the floe movement over a period of days. The resulting ocean current maps were about as accurate as maps made using traditional methods. Tracking sea ice will help scientists better understand the sources driving sea ice transport.
Publ.Date : Thu, 14 Nov 2019 16:19:09 EST

Bigger doesn't mean better for hatchery-released salmon
A recent study examines hatchery practices in regards to how Chinook salmon hatcheries in the PNW are affecting wild populations over the past decades. Over 65 years, Chinook salmon hatcheries in the PNW have skewed towards releasing larger fish that are more easily preyed upon.
Publ.Date : Thu, 14 Nov 2019 16:18:58 EST

Ocean studies look at microscopic diversity and activity across entire planet
Two new articles use samples and data collected during the Tara Oceans Expedition to analyze current ocean diversity across the planet, providing a baseline to better understand climate change's impact on the oceans.
Publ.Date : Thu, 14 Nov 2019 11:59:30 EST

How giant kelp may respond to climate change
Like someone from Minnesota being dropped into an Arizona heat wave, giant kelp living in cooler, high-latitude waters were more vulnerable to excessive heat than kelp already living in warmer, Southern California waters, according to a study of Chilean and Californian kelp.
Publ.Date : Wed, 13 Nov 2019 17:03:10 EST

Something old, something new in the ocean's blue
Microbiologists have discovered a new metabolic process in the ocean. Ranging from molecular structures of individual genes and detection of their global distribution, their results give insight into the pathway process and its degradation products and thus provide valuable information for future calculations of the ocean`s carbon dioxide balance.
Publ.Date : Wed, 13 Nov 2019 15:30:35 EST

Tuna carbon ratios reveal shift in food web
The ratio of carbon isotopes in three common species of tuna has changed substantially since 2000, suggesting major shifts are also taking place in the phytoplankton populations that form the basis of the ocean's food web, according to a new international study. Much of the change occurring in phytoplankton physiology and species composition may be driven by increased ocean stratification, an impact of climate change, the study suggests.
Publ.Date : Wed, 13 Nov 2019 15:30:33 EST

Ancient rain gauge: New evidence links groundwater, climate changes in deep time
Changes in groundwater millions of years ago created alternating layers of vivid yellow and brown in the mineral sphalerite, and those variations align with movements in Earth's orbit that impacted climate in the deep past, scientists found.
Publ.Date : Tue, 12 Nov 2019 12:26:35 EST

Last Arctic ice refuge is disappearing
The oldest and thickest Arctic sea ice is disappearing twice as fast as ice in the rest of the Arctic Ocean, according to new research.
Publ.Date : Tue, 12 Nov 2019 11:40:09 EST

Nitrous oxide emissions set to rise in the Pacific Ocean
The acidification of the Pacific Ocean in northern Japan is increasing the natural production rate of N2O, an ozone-depleting greenhouse gas.
Publ.Date : Tue, 12 Nov 2019 11:02:08 EST

Prey-size plastics are invading larval fish nurseries
Researchers revealed that many larval fish species from different ocean habitats are ingesting plastics in their preferred nursery habitat.
Publ.Date : Mon, 11 Nov 2019 15:06:36 EST

Scientists find eternal Nile to be more ancient than previously thought
The Nile's unchanging path has been a geologic mystery because long-lived rivers usually move over time. Researchers have cracked the case by linking the river's flow to the movement of rock in the Earth's deep mantle. In the course of their investigation, they found the age of the Nile to be 30 million years -- about six times as long as previously thought.
Publ.Date : Mon, 11 Nov 2019 12:47:57 EST

New study first to reveal growth rates of deep-sea coral communities
Researchers revealed for the first time growth rates of deep-sea coral communities and the pattern of colonization by various species over time scales of centuries to millennia. Age-dated submarine lava flows helped constrain maximum ages of coral communities.
Publ.Date : Mon, 11 Nov 2019 10:09:21 EST

Coastlines' contribution to climate change might have been underestimated
Permafrost coasts make up about one third of the Earth's total coastline. As a result of accelerated climate change, whole sections of coastline rapidly thaw, and erode into the Arctic Ocean. A new study now shows that large amounts of carbon dioxide are potentially being produced along these eroding permafrost coastlines in the Arctic.
Publ.Date : Fri, 08 Nov 2019 16:25:59 EST

Melting Arctic sea ice linked to emergence of deadly virus in marine mammals
Scientists have linked the decline in Arctic sea ice to the emergence of a deadly virus that could threaten marine mammals in the North Pacific, according to a study.
Publ.Date : Thu, 07 Nov 2019 11:29:26 EST

Simulated sunlight reveals how 98% of plastics at sea go missing each year
A new study helps to solve the mystery of missing plastic fragments at sea. Scientists selected microplastics prevalently found on the ocean surface and irradiated them with a solar simulator system. They found that simulated sunlight increased the amount of dissolved carbon in the water, making those tiny plastic particles tinier. Direct, experimental proof of the photochemical degradation of marine plastics remains rare. This work provides novel insight into the removal mechanisms and potential lifetimes of a select few microplastics.
Publ.Date : Thu, 07 Nov 2019 09:26:04 EST

Investigation of oceanic 'black carbon' uncovers mystery in global carbon cycle
An unexpected finding challenges a long-held assumption about the origin of oceanic black coal, and introduces a tantalizing new mystery: If oceanic black carbon is significantly different from the black carbon found in rivers, where did it come from?
Publ.Date : Thu, 07 Nov 2019 08:40:43 EST

Changes in high-altitude winds over the South Pacific produce long-term effects
In the past million years, the high-altitude winds of the southern westerly wind belt, which spans nearly half the globe, didn't behave as uniformly over the Southern Pacific as previously assumed. Instead, they varied cyclically over periods of ca. 21,000 years. A new study has now confirmed close ties between the climate of the mid and high latitudes and that of the tropics in the South Pacific.
Publ.Date : Tue, 05 Nov 2019 10:44:18 EST

Sea levels to continue rising after Paris agreement emission pledges expire in 2030
Sea levels will continue to rise around the world long after current carbon emissions pledges made through the Paris climate agreement are met and global temperatures stabilize, a new study indicates.
Publ.Date : Mon, 04 Nov 2019 15:56:57 EST

Deep sea vents had ideal conditions for origin of life
By creating protocells in hot, alkaline seawater, a research team has added to evidence that the origin of life could have been in deep-sea hydrothermal vents rather than shallow pools.
Publ.Date : Mon, 04 Nov 2019 11:24:37 EST