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Mechanisms Of Variability Of Air Sea Fluxes Of Carbon Dioxide From The Coastal Ocean To The Open Ocean
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Book Synopsis Mechanisms of Variability of Air-sea Fluxes of Carbon Dioxide from the Coastal Ocean to the Open Ocean by : Suki Cheuk-Kiu Wong
Download or read book Mechanisms of Variability of Air-sea Fluxes of Carbon Dioxide from the Coastal Ocean to the Open Ocean written by Suki Cheuk-Kiu Wong and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: We find that the dominant mode of decadal air-sea CO2 flux variability exhibits strong synchronous signals over the tropical Pacific and Southern Ocean. We suggest that the synchronicity between the tropical Pacific and the Southern Ocean is modulated by the Pacific Decadal Oscillation (PDO) index, which is connected to the Multivariate ENSO Index (MEI). The composite patterns over the tropical Pacific can be explained by ENSO-like mechanisms operating on the decadal timescale, while the composite patterns over the Southern Ocean show a different regime where the westerly winds weakened over the composite period, the mixed layer shoaled, and the Southern Ocean sink weakened. Using a box model, we show that this reduction in mixed layer entrainment drives an accumulation of DIC in the mixed layer, which, when amplified by the high Revelle factor in the Southern Ocean, results in a 14-fold amplification in the surface pCO2, reducing the ocean's capacity to uptake CO2.
Book Synopsis Ocean-Atmosphere Interactions of Gases and Particles by : Peter S. Liss
Download or read book Ocean-Atmosphere Interactions of Gases and Particles written by Peter S. Liss and published by Springer. This book was released on 2013-12-18 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: The oceans and atmosphere interact through various processes, including the transfer of momentum, heat, gases and particles. In this book leading international experts come together to provide a state-of-the-art account of these exchanges and their role in the Earth-system, with particular focus on gases and particles. Chapters in the book cover: i) the ocean-atmosphere exchange of short-lived trace gases; ii) mechanisms and models of interfacial exchange (including transfer velocity parameterisations); iii) ocean-atmosphere exchange of the greenhouse gases carbon dioxide, methane and nitrous oxide; iv) ocean atmosphere exchange of particles and v) current and future data collection and synthesis efforts. The scope of the book extends to the biogeochemical responses to emitted / deposited material and interactions and feedbacks in the wider Earth-system context. This work constitutes a highly detailed synthesis and reference; of interest to higher-level university students (Masters, PhD) and researchers in ocean-atmosphere interactions and related fields (Earth-system science, marine / atmospheric biogeochemistry / climate). Production of this book was supported and funded by the EU COST Action 735 and coordinated by the International SOLAS (Surface Ocean- Lower Atmosphere Study) project office.
Book Synopsis Interannual Variability of Air-sea Fluxes of Carbon Dioxide and Oxygen by : Galen Anile McKinley
Download or read book Interannual Variability of Air-sea Fluxes of Carbon Dioxide and Oxygen written by Galen Anile McKinley and published by . This book was released on 2002 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: (Cont.) A global, high-resolution ocean general circulation model is used to estimate the magnitude and understand the mechanisms of interannual variability in air-sea fluxes of both CO2 and 02. I find that the global variability in the fluxes of both gases are dominantly forced by large-scale physical processes governing upper ocean dynamics, particularly El Nifio / Southern Oscillation (ENSO) and, for 02, the North Atlantic Oscillation (NAO). Estimates of the extremes of CO2 and 02 flux variability for the period 1980-1998 are +/-0.5x1015 grams Carbon/yr (PgC/yr) and -70/+100x1012 mol/yr (Tmol/yr), respectively. Global 02 flux variability implies up to a 1.0 PgC/yr error in estimates of interannual variability in land and ocean CO2 sinks derived from atmospheric 02/N2 observations. This error is significant for estimates of annual sinks, but it is cumulatively negligible for estimates of mean sinks from October 1991 to April 1998. Increasing convergence of estimates of land.
Book Synopsis The Ocean Carbon Cycle and Climate by : Mick Follows
Download or read book The Ocean Carbon Cycle and Climate written by Mick Follows and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 401 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our desire to understand the global carbon cycle and its link to the climate system represents a huge challenge. These overarching questions have driven a great deal of scientific endeavour in recent years: What are the basic oceanic mechanisms which control the oceanic carbon reservoirs and the partitioning of carbon between ocean and atmosphere? How do these mechanisms depend on the state of the climate system and how does the carbon cycle feed back on climate? What is the current rate at which fossil fuel carbon dioxide is absorbed by the oceans and how might this change in the future? To begin to answer these questions we must first understand the distribution of carbon in the ocean, its partitioning between different ocean reservoirs (the "solubility" and "biological" pumps of carbon), the mechanisms controlling these reservoirs, and the relationship of the significant physical and biological processes to the physical environment. The recent surveys from the JGOFS and WOCE (Joint Global Ocean Flux Study and World Ocean Circulation Ex periment) programs have given us a first truly global survey of the physical and biogeochemical properties of the ocean. These new, high quality data provide the opportunity to better quantify the present oceans reservoirs of carbon and the changes due to fossil fuel burning. In addition, diverse process studies and time-series observations have clearly revealed the complexity of interactions between nutrient cycles, ecosystems, the carbon-cycle and the physical envi ronment.
Book Synopsis The Changing Ocean Carbon Cycle by : Roger B. Hanson
Download or read book The Changing Ocean Carbon Cycle written by Roger B. Hanson and published by Cambridge University Press. This book was released on 2000-01-13 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: The world's oceans act as a reservoir, with the capacity to absorb and retain carbon dioxide. The air-sea exchange of carbon is driven by physico-chemical forces, photosynthesis, and respiration, and has an important influence on atmospheric composition. Variability in the ocean carbon cycle could therefore exert significant feedback effects during conditions of climate change. The Joint Global Ocean Flux Study (JGOFS) is the first multidisciplinary program to directly address the interactions among the biology, chemistry, and physics of marine systems, with emphasis on the transport and transformations of carbon within the ocean and across its boundaries. This unique volume, written by an international panel of scientists, provides a synthesis of JGOFS science and its achievements to date. The authoritative chapters will be of great interest to readers seeking a current overview of the role of ocean processes in Earth system science and their wider implications for climate change.
Book Synopsis Air-Sea Interaction by : G. T. Csanady
Download or read book Air-Sea Interaction written by G. T. Csanady and published by Cambridge University Press. This book was released on 2001-03-19 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: Air-Sea Interaction: Laws and Mechanisms provides a comprehensive account of how the atmosphere and the ocean interact to control the global climate, what physical laws govern this interaction, and what are its prominent mechanisms. It is mainly directed towards graduate students and research scientists in meteorology, oceanography, and environmental engineering. The book will be of value on entry level courses in meteorology and oceanography, and also to the broader physics community interested in the treatment of transfer laws, and thermodynamics of the atmosphere and ocean.
Book Synopsis Capturing Dynamics of Marine Inorganic Carbon Fluxes from Diurnal to Decadal Timescales by : Sophie N. Chu
Download or read book Capturing Dynamics of Marine Inorganic Carbon Fluxes from Diurnal to Decadal Timescales written by Sophie N. Chu and published by . This book was released on 2017 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt: The marine carbon cycle plays an important role in regulating Earth's climate. The vastness of the open ocean and the large variability in the coastal ocean provide obstacles to accurately quantify storage and transport of inorganic carbon within marine ecosystems and between marine and other earth systems. Thus far, the open ocean has been the only true net sink of anthropogenic carbon dioxide (Canthro) emissions. However, ocean storage of Canthro is not uniformly distributed. Changes in water chemistry in the Northeast Pacific were quantified to estimate the amount of Canthro stored in this region over the last decade. This additional Canthro was found to cause acidification and aragonite saturation horizon shoaling at rates towards the higher end of those found in Pacific and Atlantic Ocean basins, making the Northeast Pacific one of the most sensitive regions to the invasion of anthropogenic carbon dioxide. Due to large variability in biogeochemical signals in coastal oceans, it is challenging to accurately assess carbon fluxes across different boundaries, such as tidal exchange between coastal wetlands and coastal oceans. Coastal salt marshes have been suggested to be a large net CO2 sink, thus designated as a type of "blue carbon." However, accurate and dynamic estimates of carbon fluxes to and from tidal marshes are still premature, particularly carbon fluxes from marshes to the coastal ocean via tidal exchange, often referred to as marsh lateral fluxes. In this thesis, lateral total alkalinity (TA) and dissolved inorganic carbon (DIC) export fluxes were realistically quantified using high frequency time-series, in situ data. High-resolution fluxes permitted a closer look at how marsh generated TA and DIC are being exported over diurnal, spring-neap, and seasonal scales. I investigated the best way to capture variability of marsh exports via traditional bottle sampling and assessed uncertainties associated with different sampling strategies. Marsh TA and DIC exports significantly modified buffering capacity of coastal waters. This work contains the first realistic estimate of TA exports from a tidal salt marsh. Accurate estimates of DIC and TA fluxes indicate the significance of salt marshes to the coastal carbon and alkalinity budgets.
Book Synopsis Capturing Dynamics of Inorganic Carbon Fluxes from Diurnal to Decadal Timescales by : Sophie Ning-Shin Chu
Download or read book Capturing Dynamics of Inorganic Carbon Fluxes from Diurnal to Decadal Timescales written by Sophie Ning-Shin Chu and published by . This book was released on 2017 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt: The marine carbon cycle plays an important role in regulating Earth's climate. The vastness of the open ocean and the large variability in the coastal ocean provide obstacles to accurately quantify storage and transport of inorganic carbon within marine ecosystems and between marine and other earth systems. Thus far, the open ocean has been the only true net sink of anthropogenic carbon dioxide (Canthro) emissions. However, ocean storage of Canthro is not uniformly distributed. Changes in water chemistry in the Northeast Pacific were quantified to estimate the amount of Canthro stored in this region over the last decade. This additional Canthro was found to cause acidification and aragonite saturation horizon shoaling at rates towards the higher end of those found in Pacific and Atlantic Ocean basins, making the Northeast Pacific one of the most sensitive regions to the invasion of anthropogenic carbon dioxide. Due to large variability in biogeochemical signals in coastal oceans, it is challenging to accurately assess carbon fluxes across different boundaries, such as tidal exchange between coastal wetlands and coastal oceans. Coastal salt marshes have been suggested to be a large net CO2 sink, thus designated as a type of "blue carbon." However, accurate and dynamic estimates of carbon fluxes to and from tidal marshes are still premature, particularly carbon fluxes from marshes to the coastal ocean via tidal exchange, often referred to as marsh lateral fluxes. In this thesis, lateral total alkalinity (TA) and dissolved inorganic carbon (DIC) export fluxes were realistically quantified using high frequency time-series, in situ data. High-resolution fluxes permitted a closer look at how marsh generated TA and DIC are being exported over diurnal, spring-neap, and seasonal scales. I investigated the best way to capture variability of marsh exports via traditional bottle sampling and assessed uncertainties associated with different sampling strategies. Marsh TA and DIC exports significantly modified buffering capacity of coastal waters. This work contains the first realistic estimate of TA exports from a tidal salt marsh. Accurate estimates of DIC and TA fluxes indicate the significance of salt marshes to the coastal carbon and alkalinity budgets.
Book Synopsis Air-Sea Momentum, Heat, and Carbon Dioxide Fluxes in Shallow Coastal Ecosystems by : Michelle Fogarty
Download or read book Air-Sea Momentum, Heat, and Carbon Dioxide Fluxes in Shallow Coastal Ecosystems written by Michelle Fogarty and published by . This book was released on 2018 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: The exchange of mass and energy between the atmosphere and the surface below it is not well understood in shallow coastal ecosystems. This thesis addresses those exchanges in an intertidal salt marsh and a shallow embayment. Additionally, the effect of light scattering on albedo is studied with a radiative transfer model for test cases representing a wide range of coastal systems. Over the marsh, the observed fluxes depend on the timing of both solar noon and tidal inundation. A carbon dioxide flux model incorporating these factors is developed and used to estimate the net vertical seasonal carbon exchange for the marsh system. In the coastal embayment, the observed momentum and heat fluxes are compared to estimates generated by existing parameterizations. The COARE 3.5 bulk flux algorithm underestimates the observed wind stress, but estimates observed values well after a simple modification to the roughness length parameterization. Unexpectedly, the buoyancy flux estimated by COARE 3.5 is in good agreement with observations. The radiative transfer model indicates a commonly used open-ocean parameterization of albedo provides a reasonable estimate of net shortwave heat flux in most shallow coastal waters with depths > 1 m. The exceptions are environments with bright sand bottoms or highly turbid water. Guidance is provided to researchers who need to determine albedo in highly reflective or highly turbid conditions but have no direct observations. This thesis illustrates the potential consequences of using parameterizations developed in non-coastal environments, and provides examples of how to modify the parameterizations for successful use in shallow ecosystems.
Book Synopsis Energy, Water, and Carbon Dioxide Fluxes at the Earth’s Surface by : Meghan F. Cronin
Download or read book Energy, Water, and Carbon Dioxide Fluxes at the Earth’s Surface written by Meghan F. Cronin and published by Frontiers Media SA. This book was released on 2022-10-03 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spatial and Temporal Variations in the Air-Sea Carbon Dioxide Fluxes of Florida Bay by : Christopher Michael Dufore
Download or read book Spatial and Temporal Variations in the Air-Sea Carbon Dioxide Fluxes of Florida Bay written by Christopher Michael Dufore and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The flux of CO2 between the ocean and the atmosphere is an important measure in determining local, global, and regional, as well as short term and long term carbon budgets. In this study, air-sea CO2 fluxes measured using a floating chamber were used to examine the spatial and temporal variability of CO2 fluxes in Florida Bay. Measurements of dissolved inorganic carbon and total alkalinity obtained concurrently with chamber measurements of CO2 flux allowed calculation of [Delta]pCO2 from flux measurements obtained at zero wind velocity. Floating chamber measurements of [Delta]pCO2 were subsequently coupled with wind speed data to provide a simple yet reliable means of predicting absolute flux values. Florida Bay is a marine-dominated, sub-tropical estuary located at the southern tip of the Florida peninsula. Spatial variability within the bay reveals four distinct regions that appear to be affected by a variety of physical, chemical and biological processes. In the eastern part of the bay, the waters tend to be oversaturated with respect to CO2, likely due to the input of freshwater from Taylor Slough. The central portion of the bay is characterized by a number of extremely shallow semi-isolated basins with limited exchange with the rest of the bay. This area is typically undersaturated with respect to CO2 and provides a sink for atmospheric CO2. Both the northern and southern regions were highly variable both spatially and temporally.
Book Synopsis Interannual Variability of Atmospheric Carbon Dioxide Flux in the Equatorial Pacific Ocean by : Mark Alan Verschell
Download or read book Interannual Variability of Atmospheric Carbon Dioxide Flux in the Equatorial Pacific Ocean written by Mark Alan Verschell and published by . This book was released on 1996 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Establishing Constraints on Carbon Dioxide Fluxes and Transport in a Changing Arctic Ocean Climate System by : Kelly Anne Graham
Download or read book Establishing Constraints on Carbon Dioxide Fluxes and Transport in a Changing Arctic Ocean Climate System written by Kelly Anne Graham and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantifying Earth's carbon budget remains an imperative task in the carbon cycle science community. Among its challenges, assessing carbon fluxes over the Arctic Ocean remains an arduous task, due to its remoteness and difficulty to observe. While the global oceans take up carbon in the net, the Arctic Ocean has been found to be regionally variable in both flux sign and magnitude. Coupled with a warming climate and declining sea ice, future projections of the Arctic carbon budget are highly uncertain. As the Arctic climate rapidly warms, there is a critical need for understanding its observed changes and variability, but a lack of long-term observations has historically hindered progress. This work analyzes measurements of atmospheric carbon dioxide (CO2) mixing ratios from an 8-year dataset of measurements obtained over Arctic sea ice (the O-Buoy Network; 2009-2016). These observations, along with measurements from coastal observatories, were analyzed and interpreted with an atmospheric chemical transport model. This model reproduced the observed features of the seasonal cycle and shows that terrestrial biosphere fluxes and synoptic transport explain most CO2 variability over the surface of the Arctic Ocean. Interannually, the coastal observations were more comparable in overall CO2 growth than concurrent measurements over sea ice. Evidence indicating the presence of ocean gas exchange in and around sea ice during periods where this growth discrepancy occurs is discussed. In addition, a Lagrangian trajectory model and airmass contact tracers were used to gain insight into upwind source and sink regions of CO2 residuals over Utqiagvik, Alaska, and O-Buoys within the Beaufort Gyre during distinct periods based on the mean seasonal cycle of CO2. It was found that the terrestrial Arctic-boreal zone did not provide the carbon emissions expected for the large CO2 residual events. Finally, the O-Buoy observations are assimilated into an atmospheric inversion, along with additional datasets of satellite and surface observations. The inversions demonstrated the value of incorporating O-Buoy observations, which helped to constrain scaling factors for ocean and land fluxes over the northern high latitudes. Overall, this work highlights the importance of obtaining continuous observations over the Arctic and Arctic Ocean during this era of rapid biogeochemical change.
Book Synopsis Coastal Ocean Fluxes and Resources by : P. Holligan
Download or read book Coastal Ocean Fluxes and Resources written by P. Holligan and published by . This book was released on 1990 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Sea Surface and Global Change by : Peter S. Liss
Download or read book The Sea Surface and Global Change written by Peter S. Liss and published by Cambridge University Press. This book was released on 1997-03-20 with total page 539 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thorough review of sea-surface microlayer properties and role in global change.
Book Synopsis Ocean Dynamics and the Carbon Cycle by : Richard G. Williams
Download or read book Ocean Dynamics and the Carbon Cycle written by Richard G. Williams and published by Cambridge University Press. This book was released on 2011-07-14 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook for advanced undergraduate and graduate students presents a multidisciplinary approach to understanding ocean circulation and how it drives and controls marine biogeochemistry and biological productivity at a global scale. Background chapters on ocean physics, chemistry and biology provide students with the tools to examine the range of large-scale physical and dynamic phenomena that control the ocean carbon cycle and its interaction with the atmosphere. Throughout the text observational data is integrated with basic physical theory to address cutting-edge research questions in ocean biogeochemistry. Simple theoretical models, data plots and schematic illustrations summarise key results and connect the physical theory to real observations. Advanced mathematics is provided in boxes and appendices where it can be drawn on to assist with the worked examples and homework exercises available online. Further reading lists for each chapter and a comprehensive glossary provide students and instructors with a complete learning package.
Book Synopsis Ocean Circulation and Climate by : Toste Tanhua
Download or read book Ocean Circulation and Climate written by Toste Tanhua and published by Elsevier Inc. Chapters. This book was released on 2013-10-22 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon is a fundamental component of all life and its gaseous form, carbon dioxide (CO2), is an important atmospheric regulator of Earth’s climate. Over societally relevant timescales, diverse physical, biological, and chemical processes in the global ocean have a very important role in controlling the exchanges of CO2 with the atmosphere and climate, given that the ocean contains roughly 60 times more carbon than the atmosphere. The complex and dynamic marine carbon cycle is thus a fundamental part and regulator of life on Earth, requiring monitoring of its variability and understanding of the feedbacks to the climate system. This is particularly relevant given that emissions of human produced (anthropogenic) CO2 through fossil fuel and land use changes have led to significant perturbations in the global carbon cycle. A large fraction of emitted anthropogenic carbon (Cant) has been and will be absorbed by the oceans with implications for seawater chemistry, ocean pH levels, and the biological communities contained within. During the last few decades, quantification of the ocean sink of CO2 and its temporal evolution of the marine carbon cycle has been an important driver of marine biogeochemical research. Scientific expeditions such as the World Ocean Circulation Experiment/Joint Global Ocean Flux Study global surveys conducted during the 1990s provided the data for the first global estimates of the uptake and oceanic sink of Cant. More recently, completion of a second global survey of the marine carbon cycle (from 2000 to 2013) provided sufficient data to assess the rate of uptake and storage of Cant within the interior of the global ocean. From this effort, it has become clear that there is substantial regional and temporal variability of the storage rate of Cant and those physico-biogeochemical processes that influence the marine carbon cycle. Here we review seawater carbonate chemistry, the sampling strategies, and networks required to observe variability in the global ocean carbon cycle and the flux of carbon between the ocean and the atmosphere but with a central focus, synthesizing and summarizing available estimates of the ocean uptake and inventories of Cant. This chapter is aimed at a wider audience within the oceanographic community and points to the rich literature on marine carbon cycle research.
