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  • 1
    Online Resource
    Online Resource
    Newark :John Wiley & Sons, Incorporated,
    Keywords: Sea level. ; Oceanography. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (456 pages)
    Edition: 1st ed.
    ISBN: 9781444323283
    Language: English
    Note: UNDERSTANDING SEA-LEVEL RISE AND VARIABILITY -- Contents -- Editor Biographies -- Contributors -- Foreword -- Acknowledgments -- Abbreviations and Acronyms -- 1: Introduction -- References -- 2: Impacts of and Responsesto Sea-Level Rise -- 2.1 Introduction -- 2.2 Climate Change and Global/Relative Sea-Level Rise -- 2.3 Sea-Level Rise and Resulting Impacts -- 2.4 Framework and Methods for the Analysis of Sea-Level-Rise Impacts -- 2.5 Recent Impacts of Sea-Level Rise -- 2.6 Future Impacts of Sea-Level Rise -- 2.7 Responding to Sea-Level Rise -- 2.8 Next Steps -- 2.9 Concluding Remarks -- Acknowledgments -- References -- 3: A First-Order Assessment of the Impact of Long-Term Trends in Extreme Sea Levels on Offshore Structures and Coastal Refineries -- 3.1 Introduction -- 3.2 Design Considerations -- 3.3 Impact of Long-Term Trends in Extreme Sea Levels -- 3.4 Evaluating the Economic Impact -- 3.5 Conclusions -- References -- 4: Paleoenvironmental Records, Geophysical Modeling, and Reconstruction of Sea-Level Trends and Variability on Centennial and Longer Timescales -- 4.1 Introduction -- 4.2 Past Sea-Level Changes -- 4.3 Sea-Level Indicators -- 4.4 Geophysical Modeling of Variability in Relative Sea-Level History -- 4.5 Regional Case Studies -- 4.6 Discussion and Conclusions -- Acknowledgments -- References -- 5: Modern Sea-Level-Change Estimates -- 5.1 Introduction -- 5.2 Estimates from Proxy Sea-Level Records -- 5.3 Estimates of Global Sea-Level Change from Tide Gauges -- 5.4 Estimates of Global Sea-Level Change from Satellite Altimetry -- 5.5 Recommendations -- Acknowledgments -- References -- 6: Ocean Temperature and Salinity Contributions to Global and Regional Sea-Level Change -- 6.1 Introduction -- 6.2 Direct Estimates of Steric Sea-Level Rise -- 6.3 Estimating Steric Sea-Level Change Using Ocean Syntheses. , 6.4 Inferring Steric Sea Level from Time-Variable Gravity and Sea Level -- 6.5 Modeling Steric Sea-Level Rise -- 6.6 Conclusions and Recommendations -- Acknowledgments -- References -- 7: Cryospheric Contributions to Sea-Level Rise and Variability -- 7.1 Introduction -- 7.2 Mass-Balance Techniques -- 7.3 Ice-Sheet Mass Balance -- 7.4 Mass Balance of Glaciers and Ice Caps -- 7.5 Glacier, Ice-Cap, and Ice-Sheet Modeling -- 7.6 Summary and Recommendations -- References -- 8: Terrestrial Water-Storage Contributions to Sea-Level Rise and Variability -- 8.1 Introduction -- 8.2 Analysis Tools -- 8.3 Climate-Driven Changes of Terrestrial Water Storage -- 8.4 Direct Anthropogenic Changes of Terrestrial Water Storage -- 8.5 Synthesis -- 8.6 Recommendations -- References -- 9: Geodetic Observations and Global Reference Frame Contributions to Understanding Sea-Level Rise and Variability -- 9.1 Introduction -- 9.2 Global and Regional Reference Systems -- 9.3 Linking GPS to Tide Gauges and Tide-Gauge Benchmarks -- 9.4 Recommendations for Geodetic Observations -- Acknowledgments -- References -- 10: Surface Mass Loading on a Dynamic Earth:Complexity and Contamination in the Geodetic Analysis of Global Sea-Level Trends -- 10.1 Introduction -- 10.2 Glacial Isostatic Adjustment -- 10.3 Sea Level, Sea Surface, and the Geoid -- 10.4 Rapid Melting and Sea-Level Fingerprints -- 10.5 Great Earthquakes -- 10.6 Final Remarks -- Acknowledgments -- References -- 11: Past and Future Changes in Extreme Sea Levels and Waves -- 11.1 Introduction -- 11.2 Evidence for Changes in Extreme Sea Levels and Waves in the Recent Past -- 11.3 Mid-Latitude and Tropical Storms: Changes in the Atmospheric Drivers of Extreme Sea Level -- 11.4 Future Extreme Water Levels -- 11.5 Future Research Needs -- 11.6 Conclusions -- Acknowledgments -- References. , 12: Observing Systems Needed to Address Sea-evel Rise and Variability -- 12.1 Introduction -- 12.2 Sustained, Systematic Observing Systems(Existing Capabilities) -- 12.3 Development of Improved Observing Systems(New Capabilities) -- 12.4 Summary -- References -- 13: Sea-Level Rise and Variability: Synthesis and Outlook for the Future -- 13.1 Historical Sea-Level Change -- 13.2 Why is Sea Level Rising? -- 13.3 The Regional Distribution of Sea-Level Rise -- 13.4 Projections of Sea-Level Rise for the 21st Century and Beyond -- 13.5 Changes in Extreme Events -- 13.6 Sea Level and Society -- References -- Index.
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  • 2
    Online Resource
    Online Resource
    San Diego :Elsevier Science & Technology,
    Keywords: World Ocean Circulation Experiment. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (893 pages)
    Edition: 2nd ed.
    ISBN: 9780123918536
    Series Statement: Issn Series ; v.Volume 103
    DDC: 551.46/2
    Language: English
    Note: Front Cover -- Ocean Circulation and Climate: A 21st Century Perspective -- Copyright -- Contents -- Contributors -- Acknowledgments -- Cover Graphics -- Preface -- Part I: The Ocean's Role in the Climate System -- Chapter 1: The Ocean as a Component of the Climate System -- 1. Setting the Scene -- 2. The Ocean as an Exchanging Earth System Reservoir -- 3. Atmosphere-Ocean Fluxes and Meridional Transports -- 4. Global-Scale Surface and Deep Ocean Circulations -- 5. Large-Scale Modes of Variability Involving the Ocean -- 6. The Ocean's Role in Past Climate Change -- 7. The Ocean in the Anthropocene -- 8. Concluding Thoughts -- Acknowledgments -- References -- Chapter 2: Paleoclimatic Ocean Circulation and Sea-Level Changes -- 1. Introduction -- 2. Reconstructing Past Ocean States -- 2.1. Proxies for Past Ocean Circulation -- 2.1.1. Nutrient Water Mass Tracers -- 2.1.2. Conservative Water Mass Tracers -- 2.1.3. Circulation Rate Tracers -- 2.1.4. Other Tracers -- 2.2. Past Sea-Level Proxies -- 2.2.1. Coastal Morphology and Corals -- 2.2.2. Sediment Cores -- 2.2.3. Manmade Sea-Level Indicators -- 2.3. Models -- 3. The Oceans in the Quaternary -- 3.1. The Last Glacial Maximum -- 3.2. Abrupt Glacial Climate Changes -- 3.2.1. Deglaciation -- 3.3. Glacial Cycles -- 3.4. Interglacial Climates -- 4. The Deeper Past -- 4.1. Challenges of Deep-Time Paleoceanography -- 4.2. The Oceans During the Mid-Cretaceous Warm Period -- 5. Outlook -- Acknowledgments -- References -- Part II: Ocean Observations -- Chapter 3: In Situ Ocean Observations: A Brief History, Present Status, and Future Directions -- 1. Introduction -- 2. Development of Present Observational Capability -- 2.1. Late Nineteenth to Mid-Twentieth Centuries -- 2.2. Second Half of Twentieth Century -- 2.3. Twenty-First Century: Consolidation of Capabilities and Growth of Sustained Observations. , 3. Emerging and Specialized Ocean Observing Technologies -- 3.1. Advanced Observing Platforms -- 3.2. Specialized Observing Systems and Technologies -- 3.3. New Sensors -- 4. Changes in Data Volume and Coverage and Implication for Synthesis Products -- 5. The Future: Outstanding Issues and a New Framework for Global Ocean Observing -- 5.1. Building on OceanObs'09 -- 6. Conclusions -- References -- Chapter 4: Remote Sensing of the Global Ocean Circulation -- 1. Introduction -- 2. Ocean General Circulation -- 3. Variability of the Large-Scale Ocean Circulation -- 3.1. Sea Surface Height -- 3.2. Ocean Mass and Bottom Pressure -- 3.3. Global Mean Sea-Level Change (see also Chapter 27) -- 3.4. Forcing by the Atmosphere and Air-Sea Interaction -- 4. Mesoscale Eddies and Fronts -- 4.1. Mapping the Eddy Field -- 4.2. Wave Number Spectra and the Ocean Energy Cascade -- 4.3. Seasonal and Interannual Variations in Eddy Energy -- 4.4. Tracking Individual Eddies -- 4.5. Surface Currents from Multisensor Mapping -- 4.6. Eddy Fluxes of Ocean Properties (see also Chapter 8) -- 4.7. Submesoscale Dynamics -- 4.8. Eddies and Biogeochemical Processes -- 5. Summary and Outlook -- Acknowledgments -- References -- Part III: Ocean Processes -- Chapter 5: Exchanges Through the Ocean Surface -- 1. Introduction -- 2. Air-Sea Exchange Formulae and Climatological Fields -- 2.1. Air-Sea Exchange Formulae -- 2.2. Climatological Fields -- 3. Measurement Techniques and Review of Datasets -- 3.1. Flux Measurement and Estimation Techniques -- 3.1.1. Advances in Parameterizations and In Situ Flux Measurements -- 3.1.2. High Quality In Situ Surface Flux Datasets -- 3.2. Flux Datasets: Overview of Recent Products -- 3.2.1. Atmospheric Reanalyses -- 3.2.2. Satellite Observations -- 3.2.3. In Situ Observations -- 3.2.4. Blended Products -- 3.3. Flux Datasets: Evaluation Techniques. , 4. Variability and Extremes -- 4.1. Impacts of Large-Scale Modes of Variability on Surface Fluxes -- 4.2. Surface Flux Response to Anthropogenic Climate Change -- 4.3. Transfers Under Extreme Conditions -- 5. Ocean Impacts -- 5.1. Impacts on Near-Surface Ocean Layer Properties, Water Mass Transformation -- 5.2. Impacts of Surface Fluxes on Ocean Circulation -- 6. Outlook and Conclusions -- 6.1. Prospects for Improved Flux Datasets -- 6.2. Prospects for Enhanced Observational Constraints -- 6.3. Conclusions -- Acknowledgments -- References -- Chapter 6: Thermodynamics of Seawater -- 1. Introduction -- 2. Absolute Salinity SA and Preformed Salinity S* -- 2.1. Reference-Composition Salinity SR -- 2.2. Absolute Salinity SA -- 2.3. Preformed Salinity S* -- 3. The Gibbs-Function Approach to Evaluating Thermodynamic Properties -- 4. The First Law of Thermodynamics and Conservative Temperature Θ -- 5. The 48-Term Expression for Specific Volume -- 6. Changes to Oceanographic Practice Under TEOS-10 -- 7. Ocean Modeling Using TEOS-10 -- 8. Summary -- Acknowledgments -- References -- Chapter 7: Diapycnal Mixing Processes in the Ocean Interior -- 1. Introduction -- 2. Mixing Basics -- 3. Turbulence in and Below the Surface Mixed Layer -- 3.1. Langmuir Turbulence -- 3.2. Inertial Motions -- 3.3. An Equatorial Example -- 3.4. Fronts and Other Lateral Processes -- 4. Mixing in the Ocean Interior -- 4.1. Internal Wave Breaking -- 4.1.1. Dissipation Near Internal Tide Generation Sites -- 4.1.2. Dissipation Near-Inertial Wave Generation Sites -- 4.1.3. Wave-Wave Interactions -- 4.1.4. Distant Graveyards -- 4.2. Mixing in Fracture Zones -- 4.3. Mesoscale Dissipation as a Source of Turbulent Mixing -- 4.4. In-Depth Example: Southern Ocean Mixing (see also Chapter 18) -- 5. Discussion -- 5.1. Finescale Parameterizations of Turbulent Mixing. , 5.2. Global Values and Patterns -- 5.3. Representing Patchy Mixing in Large-Scale Models: Progress and Consequences -- 6. Summary and Future Directions -- Acknowledgments -- References -- Chapter 8: Lateral Transport in the Ocean Interior -- 1. Introduction -- 2. Theory of Mass, Tracer, and Vector Transport -- 2.1. Fundamental Equations -- 2.1.1. Primitive Equations -- 2.1.2. Minimal-Disturbance Planes and Slopes -- 2.1.3. Density-Coordinate Continuity and Tracer Equations -- 2.2. Steady, Conservative Equations -- 2.3. Reynolds-Averaged Equations -- 2.4. Diffusion by Continuous Movements -- 2.4.1. Diagnosing Eigenvectors, Eigenvalues, and Principal Axes of Diffusivities -- 2.5. Sources of Anisotropy in Oceanic Diffusion -- 2.6. The Veronis Effect -- 2.7. Streamfunction and Diffusivity -- 3. Observations and Models of Spatial Variations of Eddy Statistics -- 4. Mesoscale Isoneutral Diffusivity Variation Parameterizations -- 4.1. Parameterizations Versus Diagnosed K -- 4.1.1. Eddy Scales Versus Instability Scale -- 4.1.2. Eddy Versus Instability Spatial Scale -- 4.1.3. Eddy Versus Instability Time Scale -- 4.2. New Parameterization Approaches and Future Developments -- 5. Conclusions and Remaining Questions -- Acknowledgment -- References -- Chapter 9: Global Distribution and Formation of Mode Waters -- 1. Mode Water Observations -- 2. Global Water Mass Census of the Upper Ocean -- 3. Global Distribution of Mode Water -- 4. Formation of Mode Water -- 5. PV Framework -- 6. Mode Water and Climate -- 7. Conclusions -- Acknowledgments -- References -- Chapter 10: Deepwater Formation -- 1. Introduction -- 1.1. Circulation and Distribution of NADW and AABW -- 1.2. Observed Heat Content Changes in AABW -- 1.3. Observed Heat Content Changes in Upper and Lower NADW -- 2. Processes of Deepwater Formation. , 2.1. Deep Convection: The Example of Formation of Upper North Atlantic Deep Water -- 2.2. Entrainment: The Example of the Formation of the Lower North Atlantic Deep Water -- 2.3. Shelf and Under-Ice Processes: The Example of Formation of AABW -- 2.3.1. Formation Rates and Spreading of AABW -- 3. Interannual and Decadal Variability in Properties, Formation Rate, and Circulation -- 3.1. Labrador Sea Water: Variability in Properties and Formation Rate -- 3.2. Greenland-Scotland Ridge Overflow Water: Variability in Properties and Overflow Rate -- 3.3. Relationship Between Formation Rates of NADW and Changes in the AMOC -- 3.4. Antarctic Bottom Water: Variability in Properties and Formation Rate -- 4. Conclusions and Outlook -- References -- Part IV: Ocean Circulation and Water Masses -- Chapter 11: Conceptual Models of the Wind-Driven and Thermohaline Circulation -- 1. Introduction -- 2. Wind-Driven Circulation -- 2.1. Ekman Layer and Ekman Overturning Cells -- 2.2. Sverdrup Balance -- 2.3. Western Boundary Currents and Inertial Recirculation -- 2.4. Vertical Structure of the Wind-Driven Circulation -- 2.5. Role of Bottom Topography -- 3. Thermohaline Circulation -- 3.1. Energetics and Global Perspective -- 3.2. Role of the Southern Ocean and Relation to the Antarctic Circumpolar Current -- 3.3. Water Mass Formation -- 3.4. Three-Dimensional Structure of the THC -- 3.5. Feedbacks and Multiple Equilibria -- 3.6. Does the South Atlantic Determine the Stability of the THC? -- 4. Transient Behaviour of the Wind-Driven and Thermohaline Circulation -- 5. Discussion and Perspective -- Acknowledgments -- References -- Chapter 12: Ocean Surface Circulation -- 1. Observed Near-Surface Currents -- 1.1. Global Drifter Program and History of Lagrangian Observations -- 1.2. Mean Surface Circulation -- 2. Geostrophic Surface Circulation. , 2.1. High-Resolution Mean Dynamic Topography.
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  • 3
  • 4
    Keywords: World Ocean Circulation Experiment ; Ocean-atmosphere interaction ; Ocean circulation ; Aufsatzsammlung ; Meeresströmung ; Klima
    Type of Medium: Book
    Pages: XXIII, 868 S. , Ill., graph. Darst., Kt.
    Edition: [2. ed.]
    ISBN: 9780123918512
    Series Statement: International geophysics series 103
    DDC: 551.46/2
    RVK:
    RVK:
    Language: English
    Note: Literaturangaben und Index (S. 843 - 868)
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  • 5
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    Academic Press
    In:  International Geophysics Series, 103 . Academic Press, San Diego, USA; London, UK, 868 pp. 2. ISBN 978-0-12-391851-2
    Publication Date: 2013-12-20
    Type: Book , PeerReviewed
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  • 6
    Publication Date: 2013-07-31
    Description: Nature Methods 10, 741 (2013). doi:10.1038/nmeth.2532 Authors: Ari E Friedland, Yonatan B Tzur, Kevin M Esvelt, Monica P Colaiácovo, George M Church & John A Calarco We report the use of clustered, regularly interspaced, short palindromic repeats (CRISPR)-associated endonuclease Cas9 to target genomic sequences in the Caenorhabditis elegans germ line using single-guide RNAs that are expressed from a U6 small nuclear RNA promoter. Our results demonstrate that targeted, heritable genetic alterations can be achieved in C. elegans, providing a convenient and effective approach for generating loss-of-function mutants.
    Print ISSN: 1548-7091
    Electronic ISSN: 1548-7105
    Topics: Biology , Medicine
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  • 7
    Publication Date: 2020-07-07
    Description: Considerable advances in the global ocean observing system over the last two decades offers an opportunity to provide more quantitative information on changes in heat and freshwater storage. Variations in these storage terms can arise through internal variability and also the response of the ocean to anthropogenic climate change. Disentangling these competing influences on the regional patterns of change and elucidating their governing processes remains an outstanding scientific challenge. This challenge is compounded by instrumental and sampling uncertainties. The combined use of ocean observations and model simulations is the most viable method to assess the forced signal from noise and ascertain the primary drivers of variability and change. Moreover, this approach offers the potential for improved seasonal-to-decadal predictions and the possibility to develop powerful multi-variate constraints on climate model future projections. Regional heat storage changes dominate the steric contribution to sea level rise over most of the ocean and are vital to understanding both global and regional heat budgets. Variations in regional freshwater storage are particularly relevant to our understanding of changes in the hydrological cycle and can potentially be used to verify local ocean mass addition from terrestrial and cryospheric systems associated with contemporary sea level rise. This White Paper will examine the ability of the current ocean observing system to quantify changes in regional heat and freshwater storage. In particular we will seek to answer the question: What time and space scales are currently resolved in different regions of the global oceans? In light of some of the key scientific questions, we will discuss the requirements for measurement accuracy, sampling, and coverage as well as the synergies that can be leveraged by more comprehensively analyzing the multi-variable arrays provided by the integrated observing system.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 8
    Publication Date: 2022-10-26
    Description: © The Author(s), 2019. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Meyssignac, B., Boyer, T., Zhao, Z., Hakuba, M. Z., Landerer, F. W., Stammer, D., Koehl, A., Kato, S., L'Ecuyer, T., Ablain, M., Abraham, J. P., Blazquez, A., Cazenave, A., Church, J. A., Cowley, R., Cheng, L., Domingues, C. M., Giglio, D., Gouretski, V., Ishii, M., Johnson, G. C., Killick, R. E., Legler, D., Llovel, W., Lyman, J., Palmer, M. D., Piotrowicz, S., Purkey, S. G., Roemmich, D., Roca, R., Savita, A., von Schuckmann, K., Speich, S., Stephens, G., Wang, G., Wijffels, S. E., & Zilberman, N. Measuring global ocean heat content to estimate the Earth energy Imbalance. Frontiers in Marine Science, 6, (2019): 432, doi: 10.3389/fmars.2019.00432.
    Description: The energy radiated by the Earth toward space does not compensate the incoming radiation from the Sun leading to a small positive energy imbalance at the top of the atmosphere (0.4–1 Wm–2). This imbalance is coined Earth’s Energy Imbalance (EEI). It is mostly caused by anthropogenic greenhouse gas emissions and is driving the current warming of the planet. Precise monitoring of EEI is critical to assess the current status of climate change and the future evolution of climate. But the monitoring of EEI is challenging as EEI is two orders of magnitude smaller than the radiation fluxes in and out of the Earth system. Over 93% of the excess energy that is gained by the Earth in response to the positive EEI accumulates into the ocean in the form of heat. This accumulation of heat can be tracked with the ocean observing system such that today, the monitoring of Ocean Heat Content (OHC) and its long-term change provide the most efficient approach to estimate EEI. In this community paper we review the current four state-of-the-art methods to estimate global OHC changes and evaluate their relevance to derive EEI estimates on different time scales. These four methods make use of: (1) direct observations of in situ temperature; (2) satellite-based measurements of the ocean surface net heat fluxes; (3) satellite-based estimates of the thermal expansion of the ocean and (4) ocean reanalyses that assimilate observations from both satellite and in situ instruments. For each method we review the potential and the uncertainty of the method to estimate global OHC changes. We also analyze gaps in the current capability of each method and identify ways of progress for the future to fulfill the requirements of EEI monitoring. Achieving the observation of EEI with sufficient accuracy will depend on merging the remote sensing techniques with in situ measurements of key variables as an integral part of the Ocean Observing System.
    Description: GJ was supported by the NOAA Research. MP and RK were supported by the Met Office Hadley Centre Climate Programme funded by BEIS and Defra. JC was partially supported by the Centre for Southern Hemisphere Oceans Research, a joint research centre between QNLM and CSIRO. CD and AS were funded by the Australian Research Council (FT130101532 and DP160103130) and its Centre of Excellence for Climate Extremes (CLEX). IQuOD team members (TB, RC, LC, CD, VG, MI, MP, and SW) were supported by the Scientific Committee on Oceanic Research (SCOR) Working Group 148, funded by the National SCOR Committees and a grant to SCOR from the U.S. National Science Foundation (Grant OCE-1546580), as well as the Intergovernmental Oceanographic Commission of UNESCO/International Oceanographic Data and Information Exchange (IOC/IODE) IQuOD Steering Group. ZZ was supported by the National Aeronautics and Space Administration (NNX17AH14G). LC was supported by the National Key Research and Development Program of China (2017YFA0603200 and 2016YFC1401800).
    Keywords: Ocean heat content ; Sea level ; Ocean mass ; Ocean surface fluxes ; ARGO ; Altimetry ; GRACE ; Earth Energy Imbalance
    Repository Name: Woods Hole Open Access Server
    Type: Article
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  • 9
    Publication Date: 2022-10-26
    Description: © The Author(s), 2019. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Palmer, M. D., Durack, P. J., Paz Chidichimo, M., Church, J. A., Cravatte, S., Hill, K., Johannessen, J. A., Karstensen, J., Lee, T., Legler, D., Mazloff, M., Oka, E., Purkey, S., Rabe, B., Sallee, J., Sloyan, B. M., Speich, S., von Schuckmann, K., Willis, J., & Wijffels, S. Adequacy of the ocean observation system for quantifying regional heat and freshwater storage and change. Frontiers in Marine Science, 6, (2019): 16, doi: 10.3389/fmars.2019.00416.
    Description: Considerable advances in the global ocean observing system over the last two decades offers an opportunity to provide more quantitative information on changes in heat and freshwater storage. Variations in these storage terms can arise through internal variability and also the response of the ocean to anthropogenic climate change. Disentangling these competing influences on the regional patterns of change and elucidating their governing processes remains an outstanding scientific challenge. This challenge is compounded by instrumental and sampling uncertainties. The combined use of ocean observations and model simulations is the most viable method to assess the forced signal from noise and ascertain the primary drivers of variability and change. Moreover, this approach offers the potential for improved seasonal-to-decadal predictions and the possibility to develop powerful multi-variate constraints on climate model future projections. Regional heat storage changes dominate the steric contribution to sea level rise over most of the ocean and are vital to understanding both global and regional heat budgets. Variations in regional freshwater storage are particularly relevant to our understanding of changes in the hydrological cycle and can potentially be used to verify local ocean mass addition from terrestrial and cryospheric systems associated with contemporary sea level rise. This White Paper will examine the ability of the current ocean observing system to quantify changes in regional heat and freshwater storage. In particular we will seek to answer the question: What time and space scales are currently resolved in different regions of the global oceans? In light of some of the key scientific questions, we will discuss the requirements for measurement accuracy, sampling, and coverage as well as the synergies that can be leveraged by more comprehensively analyzing the multi-variable arrays provided by the integrated observing system.
    Description: MP was supported by the Met Office Hadley Centre Climate Programme funded by the BEIS and Defra, and the European Union’s Horizon 2020 Research and Innovation Program under grant Agreement No. 633211 (AtlantOS). The work of PD was prepared the by Lawrence Livermore National Laboratory (LLNL) under Contract DE-AC52-07NA27344 and is a contribution to the U.S. Department of Energy, Office of Science, Climate and Environmental Sciences Division, Regional and Global Modeling and Analysis Program. LLNL Release number: LLNL-JRNL-761158. BS and JC was partially supported by the Centre for Southern Hemisphere Oceans Research, a joint research center between the QNLM and the CSIRO. BS was also supported by the Australian Government Department of the Environment and CSIRO through the National Environmental Science Program. SC was supported by the IRD and by the French national program LEFE/INSU. SC thanks W. Kessler for suggestions concerning Figure 6. BR was supported by the German Alfred-Wegener-Institut Helmholtz-Zentrum für Polar-und Meeresforschung (AWI). J-BS was supported by the CNRS/INSU and the Horizon 2020 Research and Innovation Program under Grant Agreement 637770. SS was supported by the French Institutions ENS, LMD, IPSL, and CNRS/INSU. The work of JW was performed in part at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.
    Keywords: Heat content ; Freshwater content ; Salinity ; Temperature ; Ocean observing system ; Climate change ; Climate variability ; Observing system design
    Repository Name: Woods Hole Open Access Server
    Type: Article
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  • 10
    Publication Date: 2022-05-26
    Description: Author Posting. © American Geophysical Union, 2019. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters, 46(9), (2019):4894-4903, doi:10.1029/2019GL082015.
    Description: The largest contributor to the planetary energy imbalance is well‐mixed greenhouse gases (GHGs), which are partially offset by poorly mixed (and thus northern midlatitude dominated) anthropogenic aerosols (AAs). To isolate the effects of GHGs and AAs, we analyze data from the CMIP5 historical (i.e., all natural and anthropogenic forcing) and single forcing (GHG‐only and AA‐only) experiments. Over the duration of the historical experiment (1861–2005) excess heat uptake at the top of the atmosphere and ocean surface occurs almost exclusively in the Southern Hemisphere, with AAs canceling the influence of GHGs in the Northern Hemisphere. This interhemispheric asymmetry in surface heat uptake is eliminated by a northward oceanic transport of excess heat, as there is little hemispheric difference in historical ocean heat storage after accounting for ocean volume. Data from the 1pctCO2 and RCP 8.5 experiments suggests that the future storage of excess heat will be skewed toward the Northern Hemisphere oceans.
    Description: We acknowledge the World Climate Research Programme's Working Group on Coupled Modelling, which is responsible for CMIP, and we thank the climate modeling groups for producing and making available their model output. CMIP data can be accessed at the ESGF website (https://esgfnode.llnl.gov/projects/esgfllnl/). For CMIP the U.S. Department of Energy's Program for Climate Model Diagnosis and Intercomparison provides coordinating support and led development of software infrastructure in partnership with the Global Organization for Earth System Science Portals. We also thank Paola Petrelli from the ARC Centre of Excellence for Climate Extremes, for her assistance with downloading/managing the CMIP5 data archive at the National Computational Infrastructure.
    Repository Name: Woods Hole Open Access Server
    Type: Article
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