Scaling Through Ocean Carbon | The Marine Carbon Cycle and Ocean Carbon Inventories

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We observed, in all growth phases, a curvature in the size scaling of carbon fixation, such that the relationship between carbon-specific photosynthesis and cell size was unimodal, with the highest rates being measured in intermediate-size species. The ocean carbon pool represents a critical component of the Earth’s carbon cycle, playing a pivotal role in regulating atmospheric carbon dioxide (CO2) levels and influencing climate dynamics. Marine biodiversity and climate change are intertwined through foodwebs that cycle and transport carbon and contribute to carbon sequestration. Yet, biodiversity conservation and fisheries management seldom explicitly include ocean carbon transport and sequestration.

In the past 60 years, carbon dioxide in the atmosphere has increased 100-200 times faster than it did during the end of the last ice age. Through the natural process of weathering, rocks are dissolved by rain, slowly transporting carbon through waterways and into the ocean – where CO 2 is

Work of the Climate High-Level Champions

(PDF) The changing carbon cycle of the coastal ocean

This large-scale Captura facility, shown in an artist’s rendering, could capture gigatons of carbon dioxide dissolved in ocean water. Ocean+ Habitats is a living platform providing the world’s decision-makers and communities of practice with the best possible global information, knowledge and tools required to manage and conserve ocean ecosystems.

The global carbon sink potential of coastal wastewater treatment plants through alkalinity enhancement is 18.8 Tg CO2 per year. Vesta commits to supporting other efforts to scale carbon capture through collaboration and partnership. We call on the community to hold us accountable and provide feedback as we move forward.

A new, dynamic marine particle cycling model reproduces the observed attenuation of sinking particulate organic carbon fluxes at 22 locations Particle properties, ocean temperature, and to a lesser extent, seawater viscosity explain most of the large-scale differences in mesopelagic carbon transfer efficiency Particles transport organic carbon downward more The Climate High-Level Champions’ core role is to act on behalf of the President of the Conference of the Parties to facilitate, through high-level engagement, the scaling up and strengthening of voluntary efforts, initiatives and coalitions, and to continue convening annually a high-level event together with the Executive Secretary and the incumbent and incoming Reducing CO2 emissions is part of the public discourse on addressing climate change, but what are we doing to remove CO2 that’s already been emitted? The de Lannoy Lab in McMaster Engineering is exploring how the oceans can be used to sustainably remove CO2 from the atmosphere.

The Marine Carbon Cycle and Ocean Carbon Inventories
2in the global carbon cycle
Ocean nourishment sequestering carbon dioxide in the deep ocean

The ocean regulates our climate and can significantly bufer the worst impacts of climate change, absorbing anthropogenic carbon dioxide emissions and heat from the atmosphere. But as a consequence, the ocean is warming, becoming increasingly more acidic and de-oxygenated, and sea levels are rising. These impacts are no longer projections of change, but are real and It is thought that the ocean’s biological carbon pump, the process that transfers organic matter from the surface to the deep ocean, should be sensitive to climate change because temperature controls photosynthesis and respiration rates. Boscolo-Galazzo et al. show that the efficiency of the biological carbon pump increased over the past 15 million years as the oceans

The marine carbon cycle is a key elemental cycle of the ocean and, by virtue of its interaction with the atmospheric carbon dioxide (CO 2), of fundamental importance for the Earth’s climate. If we ignore the comparatively inert (on timescales relevant to the Anthropocene) lithospheric carbon pools, the ocean constitutes by far the largest carbon reservoir of the Download scientific diagram | (a) Historical scaling of ocean anthropogenic carbon uptake ( from publication: Ocean carbon uptake under aggressive Abstract Latest Paleocene and early Eocene hyperthermals were geologically brief, profound environmental perturbations caused by massive additions of 13 C-depleted carbon to the ocean-atmosphere system, and therefore provide ancient analogs to assess the impact of modern global warming on the Earth’s ecosystem. We document and compare population changes in

New Research Unveils Ocean’s Secret Carbon Gatekeepers

The coefficients in these equations as predicted by the MTE (10, 12 – 15) are validated against experimental data. We then use Eqs. 3 and 4 to provide a theoretical framework for the evaluation of the metabolic balance of the oceans and use them to better understand the effects of temperature on oceanic carbon cycling. The biological carbon pump contributes to ocean carbon storage by moving organic carbon out of the surface ocean into deeper waters in sinking particles, vertically migrating organisms and physical circulation. Century-scale (≥100 years) storage of the resulting biogenic DIC is commonly assumed to occur exclu The oceans are the world’s sink of CO 2. In fact, 30% of annual CO 2 emissions are absorbed by the world’s oceans. Equatic leverages a first-of-a-kind electrolytic approach that removes CO 2 from the atmosphere and then uses the ocean’s natural

Welcome to Samudra Oceans Limited, UK’s pioneering force in climate technology. Explore our sustainable seaweed solutions and commitment to revolutionising blue carbon ecosystem.

Microbial degradation of organic carbon in marine sediments is a key driver of global element cycles on multiple time scales. However, it is not known to what depth microorganisms alter organic carbon in marine sediments or how microbial rates of organic carbon processing change with depth, and thus time since burial, on a global scale. To better Bremer, L. L. et al. Carbon benefits through fallow agricultural land transitions: the case of multi-strata agroforestry in Hawaiʻi. Working Paper No. 2024-4, (2024). Direct Air Capture (DAC) and Direct Ocean Capture (DOC) play crucial roles within the broader spectrum of negative emissions technologies, complementing approaches such as afforestation, Bioenergy with Carbon Capture and Storage (BECCS), and Ocean Alkalinity Enhancement (OAE) [8], [9].

Organic detritus passing from the sea surface through the water column to the sea floor controls nutrient regeneration, fuels benthic life and affects burial of organic carbon in the sediment

The Marine Carbon Cycle and Ocean Carbon Inventories

The gravitational settling of organic particles from the surface to the deep ocean is an important export pathway and one of the largest components of the ocean carbon pump. The strength and efficiency of the gravitational pump are often measured using metrics reliant on reference depths and empirical formulations that parameterize the relationship between depth Carbon uptake by the ocean has increased alongside rising atmospheric CO2 concentrations, but with substantial variability. This Review examines trends in ocean CO2 uptake and the internal and This Review discusses particle injection pumps, which inject suspended and sinking particles to different ocean depths and may sequester as much carbon as the biological gravitational pump.

In recent years, as the ocean absorbs increasing amounts of atmospheric CO 2, ocean acidification has intensified. Simultaneously, global warming and enhanced ocean stratification have led to the continuous expansion of the oceanic oxygen minimum zone (OMZ). Under the combined effects of these processes, a key question arises: How will the transport of

How the ocean absorbs carbon dioxide > In recent decades, the world ocean has absorbed around 25 per cent of the carbon dioxide emissions produced by human societies, thus retarding the progress of climate change significantly. This climate service is achieved through three natural carbon pumps whose functions may seem rather complex. Taken together, they are the reason The 2019 report provided a timely change from the ocean being seen as a ‘victim’ of climate change, as opposed to being a ‘solution’. This report takes stock of the progress made since and provides refreshed estimates of the mitigation potential of those ocean-based opportunities (ocean-based renewable energy, ocean-based transport, marine conservation and restoration,

“The idea is to enhance the ocean’s ability to take up [more] carbon dioxide, and thereby lower the levels of carbon in the atmosphere.” But the idea of experimenting with the ocean is highly controversial, especially as the technologies have not been proven at scale.

Streams and rivers play a major role in the global carbon cycle as they collect, transform and deliver terrestrial organic carbon to the ocean. The ra To highlight potential pathways towards achieving this goal, the Ocean Panel has commissioned this report, The Blue Carbon Hand-book: Blue Carbon as a Nature-Based Solution for Climate Action and Sustainable Development, produced in collaboration with the International Partnership for Blue Carbon and the Blue Carbon Initiative. Phytoplankton have been essential to life on Earth for over 35 billion years. Through photosynthesis, they consume carbon dioxide on a scale comparable to that of forests and other land plants. Edwina Tanner from the WhaleX Foundation shares insights on this and discusses the potential for plankton-based solutions in marine carbon dioxide removal (mCDR)

Carbon flows between the atmosphere, land, and ocean in a cycle that encompasses nearly all life and sets the thermostat for Earth’s climate. By burning fossil fuels, people are changing the carbon cycle with far-reaching consequences.

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