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International Conference on Paleoceanography

The conference will be hosted at the University of New South Wales (UNSW). UNSW is located close to one of the most iconic beaches in Australia and a short bus ride away from Sydney's central business district.

Following the traditional ICP format, the conference will be organised around invited plenary oral presentations as well as large and vibrant poster sessions. Networking will be at the centre of the ICP, with numerous social events including the Paleomusicology concert and conference dinner.

The lively city of Sydney has a rich cultural heritage and offers adventure and entertainment for all ages and tastes. Breathtaking coastal national parks, the Blue Mountains and the Hunter Valley, known for Australia’s finest wines, are only a daytrip away.

A range of existing pre- and post- Conference field trips will be organised in New South Wales, New Zealand and potentially the Great Barrier Reef. For those with time for exploring, Sydney is the gateway to iconic travel locations including the Great Barrier Reef, Uluru, and Kakadu National Park.

Read more about the conference on the official website.

 


../common/calendar Start Date: 9/1/19

Oceans 2019

OCEANS is the bi-annual event for global marine technologists, engineers, students, government officials, lawyers, and advocates. These industry thought leaders gather for four days to highlight relevant topics and current trends, while creating a community of learners and influencers who consistently advance research, practices, and policies for the marine field.

The Marine Technology Society and the IEEE Oceanic Engineering Society partner to present OCEANS, and this prestigious conference and exhibition draws an audience of more than 2,000 attendees:

  • Over 800 professionally reviewed technical papers, including sessions focused on local themes.
  • Plenary sessions with leaders from industry, academia, the military and government.
  • 100+ exhibitors showcasing the latest innovations in products and services.
  • A student poster session featuring outstanding projects from around the world and other student activities.
  • Tutorials, workshops, demonstrations, government listening sessions, social and networking opportunities, professional field trips …and much, much more

Read more about OCEANS on the official website.


../common/calendar Start Date: 6/16/19

Periodic changes in the Cretaceous ocean and climate caused by marine redox see-saw

Abstract.

"Periodic changes in sediment composition are usually ascribed to insolation forcing controlled by Earth’s orbital parameters. During the Cretaceous Thermal Maximum at 97–91 Myr ago (Ma), a 37–50-kyr-long cycle that is generally believed to reflect obliquity forcing dominates the sediment record.  [...]"

Source: Nature Geoscience
Authors: Klaus Wallmann et al.
DOI: 10.1038/s41561-019-0359-x

Read the full article here.


Vision is highly sensitive to oxygen availability in marine invertebrate larvae

Abstract.

"For many animals, evolution has selected for complex visual systems despite the high energetic demands associated with maintaining eyes and their processing structures. The metabolic demands of visual systems therefore make them highly sensitive to fluctuations in available oxygen. In the marine environment, oxygen changes over daily, seasonal, and inter-annual time scales and there are large gradients of oxygen with depth. [...]"

Source: Journal of Experimental Biology
Auhtors: Lillian R. McCormick, Lisa A. Levin and Nicholas W. Oesch
DOI: 10.1242/jeb.200899

Read the full article here.


Neoproterozoic to early Phanerozoic rise in island arc redox state due to deep ocean oxygenation and increased marine sulfate levels

Abstract.

"A rise in atmospheric O2 levels between 800 and 400 Ma is thought to have oxygenated the deep oceans, ushered in modern biogeochemical cycles, and led to the diversification of animals. Over the same time interval, marine sulfate concentrations are also thought to have increased to near-modern levels. We present compiled data that indicate Phanerozoic island arc igneous rocks are more oxidized (Fe3+/ΣFe ratios are elevated by 0.12) vs. Precambrian equivalents. [...]"

Source: PNAS
Authors: Daniel A. Stolper and Claire E. Bucholz
DOI: 10.1073/pnas.1821847116

Read the full article here.


Strong intensification of the Arabian Sea oxygen minimum zone in response to Arabian Gulf warming

Abstract.

"The highly saline, oxygen saturated waters of the Arabian Gulf (hereafter the Gulf) sink to intermediate depths (200‐300m) when they enter the Arabian Sea, ventilating the World's thickest oxygen minimum zone (OMZ). Here, we investigate the impacts of a warming of the Gulf consistent with climate change projections on the intensity of this OMZ. Using a series of eddy‐resolving model simulations, we show that the warming of the Gulf waters increases their buoyancy and hence limits their contribution to the ventilation of intermediate depths. [...]"

Source: Geophysical Research Letters
Authors: Z. Lachkar, M. Lévy and S. Smith
DOI: 10.1029/2018GL081631

Read the full article here.


As oceans warm, microbes could pump more CO2 back into air, study warns

"The world's oceans soak up about a quarter of the carbon dioxide that humans pump into the air each year -- a powerful brake on the greenhouse effect. In addition to purely physical and chemical processes, a large part of this is taken up by photosynthetic plankton as they incorporate carbon into their bodies. When plankton die, they sink, taking the carbon with them. Some part of this organic rain will end up locked into the deep ocean, insulated from the atmosphere for centuries or more. [...]"

Source: EurekAlert!

Read the full article here.


Complete arsenic-based respiratory cycle in the marine microbial communities of pelagic oxygen-deficient zones

Abstract.

"Marine oxygen-deficient zones (ODZs) are naturally occurring midlayer oxygen-poor regions of the ocean, sandwiched between oxygenated surface and deep layers. In the absence of oxygen, microorganisms in ODZs use other compounds, such as oxidized forms of nitrogen and sulfur, as terminal electron acceptors. [...]"

Source: PNAS
Authors: Jaclyn K. Saunders et al.
DOI: 10.1073/pnas.1818349116

Read the full article here.


Nitrogen isotope evidence for expanded ocean suboxia in the early Cenozoic

Abstract.

"The million-year variability of the marine nitrogen cycle is poorly understood. Before 57 million years (Ma) ago, the 15N/14N ratio (δ15N) of foraminifera shell-bound organic matter from three sediment cores was high, indicating expanded water column suboxia and denitrification. [...]"

Source: Science
Authors: Emma R. Kast et al.
DOI: 10.1126/science.aau5784

Read the full article here.


Deep-sea sponge grounds as nutrient sinks: High denitrification rates in boreo-arctic sponges

Abstract.

"Sponges are commonly known as general nutrient providers for the marine ecosystem, recycling organic matter into various forms of bio-available nutrients such as ammonium and nitrate. In this study we challenge this view. We show that nutrient removal through microbial denitrification is a common feature in six cold-water sponge species from boreal and Arctic sponge grounds. [...]"

Source: Biogeosciences
Authors: Christine Rooks et al.
DOI: 10.5194/bg-2019-135

Read the full article here.


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