Channing Prend

Channing Prend has written 16 posts for oceanbites

Ocean Acidification Reduces Habitat for Antarctic Organisms

A new study uses a climate model to predict that ocean acidification will reduce the viable habitat for many marine organisms in the Antarctic over the next century. This is because more acidic seawater dissolves the chemical compounds that the organisms need to form their shells. Channing PrendI’m a physical oceanography PhD student at Scripps […]

Is the Deep Pacific Cooling?

Observations from the past several decades show that the ocean is currently warming in response to increased atmospheric carbon dioxide concentrations. A recent study suggests that the deep Pacific may actually be cooling however. This is because of ocean transport pathways, which dictate that the waters in the deep Pacific have not been at the […]

Why Are Some Icebergs Green?

If someone asked you to imagine an iceberg, chances are you’d picture something big and white. However icebergs actually come in a range of colors from white, to blue, and even green. A recent study looks into what gives certain icebergs a unique green coloration. They find that iron oxide minerals are responsible, which could […]

Antarctic Ice Key to the Carbon Cycle

A recent study suggests that nutrients from glacial melt and icebergs supports a significant portion of the biological production in the Antarctic. This in turn has implications for the global carbon cycle, since photosynthesis by microorganisms is one of the ways the ocean absorbs carbon dioxide from the atmosphere. Channing PrendI’m a physical oceanography PhD […]

Reevaluating the Ocean Conveyer Belt

A recent study suggests that surface processes in the Indian and Pacific Oceans may be more important to global ocean circulation than previously thought. This has implications for our understanding of the global climate system. Channing PrendI’m a physical oceanography PhD student at Scripps Institution of Oceanography in La Jolla, California. I use a combination […]

Phytoplankton Expanding Northward as Arctic Sea Ice Retreats

A recent study uses satellite data to show that Arctic sea ice retreat is causing changes in the timing and location of spring phytoplankton blooms, which play a large role in the regional ecosystem and carbon cycle. Channing PrendI’m a physical oceanography PhD student at Scripps Institution of Oceanography in La Jolla, California. I use […]

Antarctic Eddies Suck Carbon from the Atmosphere

A recent study from researchers at the University of Tasmania investigates the relationship between ocean eddies and phytoplankton growth in the Southern Ocean using satellite data. The results can help us understand and predict how the ocean’s ability to regulate climate might change in the future. Channing PrendI’m a physical oceanography PhD student at Scripps […]

Who Governs the Ocean Around Antarctica?

Antarctica is often considered an untouched wilderness. While its location is remote, the region is hardly undisturbed by human activity. Exploitation of marine species, tourism, scientific research activities, and anthropogenic climate change are all impacting Southern Ocean ecosystems. A recent policy paper examines the governance challenges for the Antarctic, particularly those due to climate change. […]

Sea Ice Modifies Biological Processes

A recent study investigates the relationship between sea ice variability and phytoplankton growth in climate models. Phytoplankton are responsible for most of the transfer of carbon dioxide from the atmosphere to the ocean, therefore this work can help us understand and predict how the ocean’s ability to regulate climate might change in the future.     Channing […]

Sea Ice Drives Global Circulation

A recent study uses observational data from the Antarctic to show that sea ice processes help drive the global current system called the overturning circulation. This result suggests that changes to sea ice extent in the Antarctic could impact large-scale circulation as well as the ocean’s uptake of heat and carbon dioxide. Channing PrendI’m a […]

Predicted Change to the Southern Ocean Silicate Front

The Southern Ocean Silicate Front (SF) is an important boundary separating waters that are silicate-rich and waters that are silicate-poor. The position of the SF determines where microorganisms like diatoms (that need silicate to form their shells) can grow. A new study predicts a poleward shift in the Southern Ocean Silicate Front by the end […]

Why is Antarctic Sea Ice Growing?

Despite increases in global ocean temperatures, long-term trends actually show an increase in Antarctic sea ice extent. There are a number of reasons for this apparent paradox: geography, ocean properties, and atmospheric circulation to name a few. This paper examines the role of atmospheric variability in driving Southern Hemisphere sea ice trends. Channing PrendI’m a […]

Around the Antarctic in 17 Years

The transport of water from the deep ocean to the surface has many important impacts on global climate. By releasing virtual particles into climate models and tracking the pathways they take to reach the surface, this study finds that upwelling occurs much more quickly than previously thought. This result has implications for long-term climate projections. […]

Iceberg Impacts

Accurately predicting ice sheet melt location and timing is crucial to understanding and modeling global climate. In order to do this, it is necessary to assess individual freshwater sources as the researchers in this study did. Their results suggest that many of the assumptions ocean modelers make about icebergs may be incorrect. Channing PrendI’m a […]

Sea Ice Mixes it Up

Sea ice extent and concentration is driven by a complex combination of circulation and mixing, as well as interaction with the atmosphere. Understanding these processes is critical to improving climate models. This study uses models to examine the dynamics in marginal ice zones, which is becoming increasingly important for future climate predictions. Channing PrendI’m a […]

Fate of Dissolved Carbon in the Antarctic

The ocean surrounding Antarctica, called the Southern Ocean, accounts for about 40% of the total global ocean carbon uptake. This study assesses the relative importance of the mechanisms impacting carbon concentrations in the upper ocean. Their results help us understand and predict how the ocean’s ability to regulate climate might change in the future. Channing […]

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