Tag: Denis Volkov

Meridional Overturning Circulation schematic

First-ever Daily Time Series Reveals the Strength of the Deep Ocean Circulation in the South Atlantic

In a recent study published in the journal Science Advances, oceanographers at AOML and the Cooperative Institute for Marine and Atmospheric Studies for the first time describe the daily variability of the circulation of key deep currents in the South Atlantic Ocean that are linked to climate and weather. The study found that the circulation patterns in the upper and deeper layers of the South Atlantic often vary independently of each other, an important new result about the broader Meridional Overturning Circulation (MOC) in the Atlantic.

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Pods Away! New Autonomous Data Pods Will Provide Low-Cost, Reliable Data Retrieval

AOML is preparing to deploy two autonomous data pod systems with Pressure Inverted Echo Sounders near the eastern boundary of the North Atlantic during March 2020.  This will be the first full scale operational deployment of data pods, with a goal of providing a low-cost solution for the sustained Atlantic Meridional Overturning Circulation monitoring without the continuous use of a research vessel. 

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Sea Level Feedback on AMOC

New Study Shows Atlantic Meridional Overturning Circulation and Mediterranean Sea Level are Connected

The global mean sea level rise caused by ocean warming and glacier melting over landforms such as Greenland is one of the most alarming aspects of a shifting global climate. However, the dynamics of the ocean and atmosphere further influence sea level changes region by region and over time. For example, along the U.S. East Coast, a pronounced acceleration of sea level rise in 2010-2015 was observed south of Cape Hatteras, while a deceleration occurred up North.  These patterns provide background conditions, on top of which shorter-period (and often stronger) weather-driven sea level fluctuations compound what coastal communities directly experience day by day. Therefore, to develop or improve regional sea level predictions, it’s important to identify these patterns and explore how they change over time.

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Increasing water temperature tied to rapid sea level rise along the U.S. East Coast during 2010-2015

In a new article accepted for publication in the Geophysical Research Letters, Ricardo Domingues (CIMAS University of Miami & NOAA/AOML) and his coauthors explored the observed rapid sea level rise along the U.S. East Coasts during 2010-2015, which is linked to extensive flooding and “sunny day” flooding (or nuisance flooding) events in large urban areas including Norfolk, Baltimore, Charleston, and Miami, among others.

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R/V Ronald H. Brown

Indian Ocean Hydrographic Cruise Allows Scientists to Sample for the First Time Since 1995

Existing observations show that Indian Ocean surface water temperatures have been increasing since the 1970’s. But has the deep ocean warmed? Have the regional concentrations of dissolved oxygen, carbon dioxide, or nutrients changed? Has the western Indian Ocean become more acidic? These and more questions will be addressed by scientists after the completion of this cruise.

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Proposed locations for the western and eastern PIES deployments in the subtropical South Pacific (stars). The magenta line shows the P06 cruise track along 32.5°S. Photo Credit: NOAA.

Project Explores Deep Ocean Heat Accumulation in the South Pacific

One of the most challenging questions in global climate change studies today is how quickly, or if, heat that accumulates within the Earth system penetrates into the deep ocean. Scientists with the University of Miami (UM), AOML, and NASA’s Jet Propulsion Laboratory (JPL) recently tackled this question by using a combination of present-day satellite and in situ observing systems to study the distribution of heat in the oceans. 

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