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  • 2015-2019  (336)
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  • 1
    Keywords: Earth sciences. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (242 pages)
    Edition: 1st ed.
    ISBN: 9783319138657
    Series Statement: Springer Earth System Sciences Series
    DDC: 363.73874
    Language: English
    Note: Intro -- Acknowledgments -- Contents -- Part I Introduction -- 1 Earth System Science---Past Experiences and Future Trends -- Abstract -- 1 Introduction -- 2 Review -- 3 Future Trends -- 4 Conclusion -- References -- 2 The Educational Program of the Earth System Science Research School (ESSReS) -- Abstract -- 1 Introduction -- 2 The Educational Program -- 2.1 Introductory Courses -- 2.2 Expert Courses -- 2.3 Seminar Series -- 2.4 Computational Skills Courses -- 2.5 Transferable Skill Courses -- 2.6 Academic Writing Courses -- 2.7 Excursions -- 2.8 Annual Retreat -- 3 International Exchange -- 3.1 International and National Meetings -- 3.2 Visit in a Foreign Lab -- 3.3 Invited Guest Scientists -- 4 Progress Assessments -- 5 Conclusions -- References -- 3 Time Evolution of a PhD Student's Mood---A Review of My Time as PhD Student of the Research School ESSReS -- 1 Introduction -- 2 Time Evolution of a PhD Students's Mood -- 3 Conclusion -- References -- 4 Progress in Earth System Science: What Does It Take to Make Our Ideas Clear? -- Abstract -- 1 Self-critical Approach -- 2 Hypothesis Testing and Models -- 3 Building of Models and Expressing the Scientific Discoveries -- References -- Part II Remote Sensing and Modelling of Atmospheric Chemistry and Sea Ice Parameters -- 5 Towards a Better Tropospheric Ozone Data Product from SCIAMACHY: Improvements in High Latitude Stratospheric Ozone -- Abstract -- 1 Introduction -- 2 Limb Measurements and Comparison Methodology -- 3 SCIAMACHY Limb Retrieval of Version 2.9 -- 4 SCIAMACHY Limb Retrieval of Version 3.0 and Comparison Results -- 5 Conclusions -- Acknowledgments -- References -- 6 Ten-Year SCIAMACHY Stratospheric Aerosol Data Record: Signature of the Secondary Meridional Circulation Associated with the Quasi-Biennial Oscillation -- Abstract -- 1 Introduction -- 2 Instrument and Data. , 3 Results and Discussion -- 4 Conclusions -- Acknowledgments -- References -- 7 Investigating the Link Between Glyoxal and Biogenic Activities -- Abstract -- 1 Introduction -- 2 Glyoxal Retrieval -- 3 Results and Discussion -- 4 Conclusions -- Acknowledgments -- References -- 8 Estimates of NOx Emission Factors from GOME-2 Measurements for the Major Types of Open Biomass Burning -- Abstract -- 1 Introduction -- 2 Data and Methods -- 2.1 Satellite Measurements of TVC NO2 -- 2.2 Satellite Measurements of FRP -- 2.3 Land Cover Type Product -- 2.4 Production Rate of NOx from Fire -- 2.5 Estimation of NOx Emission Factors -- 3 Results and Discussion -- 4 Conclusions and Outlook -- References -- 9 The Use of FTIR-Spectrometry in Combination with Different Biosphere-Atmosphere Flux Measurement Techniques -- Abstract -- 1 Introduction -- 2 Experimental Setup -- 2.1 The Flux Gradient Technique -- 2.2 The Flux Chamber Technique -- 3 Flux Gradient- and Flux Chamber Measurements -- 4 Discussion and Conclusion -- Acknowledgments -- References -- 10 Near-Infrared Lunar Absorption Spectroscopy for the Retrieval of Column Averaged CO2 and CH4 -- Abstract -- 1 Introduction -- 2 Ground-Based Column Averaged Trace Gas Retrieval -- 3 Spectra from the Bremen Instrument Setup -- 4 xCO2 and xCH4 from Lunar Absorption Spectroscopy -- 5 Conclusions -- Acknowledgements -- References -- 11 A New Method to Filter Out Radio-Frequency Interference (RFI) from SMOS Level 1C Data for Sea Ice Applications -- Abstract -- 1 Introduction -- 2 Data Description -- 3 Filtering Procedure -- 4 Conclusion -- Acknowledgments -- References -- 12 Arctic Multiyear Ice Concentration Retrieval from SSM/I Data Using the NASA Team Algorithm with Dynamic Tie Points -- Abstract -- 1 Introduction -- 2 Method -- 3 Time Series Results -- 4 Sensitivity Study and Conclusion -- Acknowledgements -- References. , 13 Detecting CDOM Fluorescence Using High Spectrally Resolved Satellite Data: A Model Study -- Abstract -- 1 Introduction -- 2 Methods -- 2.1 DOAS Retrieval Technique -- 2.2 CDOM Fluorescence Modeling -- 2.2.1 CDOM as Mixture of Humic and Fulvic Acids -- 2.2.2 Excitation-Emission Matrices Approach -- 3 Results and Discussion -- 4 Conclusions and Outlook -- Acknowledgments -- References -- Part III Physical Oceanography -- 14 The Flow of Dense Water Plumes in the Western Weddell Sea Simulated with the Finite Element Ocean Model (FEOM) -- Abstract -- 1 Introduction -- 2 Model Setup and Experiments -- 3 Results -- 4 Summary and Conclusions -- Acknowledgments -- References -- 15 Data Analysis and Modeling of the Amundsen Sea Embayment -- Abstract -- 1 Introduction -- 2 Hydrographic Data Analysis -- 3 Modeling of the Amundsen Sea -- 4 Discussion and Outlook -- References -- Part IV Sea-ice Physics -- 16 Impact of Sea-Ice Bottom Topography on the Ekman Pumping -- Abstract -- 1 Introduction -- 2 Data and Methods -- 3 Calculation of Oceanic Drag Coefficients -- 4 Ekman Pumping -- 5 Summary and Conclusion -- Acknowledgments -- References -- 17 Classification of CryoSat-2 Radar Echoes -- Abstract -- 1 Introduction -- 2 Methods -- 3 Results -- 4 Discussion -- 5 Conclusion -- Acknowledgments -- References -- Part V Earth System Modelling and Data Analysis -- 18 Integration of Passive Tracers in a Three-Dimensional Ice Sheet Model -- Abstract -- 1 Introduction -- 2 Methods -- 2.1 Present Day Control Run -- 2.2 Passive Tracer Advection -- 2.2.1 Validation of Tracer Modules -- 2.2.2 Analytical Comparison to the Nye-Vialov Solution -- 3 Discussion -- References -- Part VI Climate Archives and Geotectonics -- 19 Bivalve Shells---Unique High-Resolution Archives of the Environmental Past -- Abstract -- 1 Introduction -- 2 Methods -- 2.1 Shell Origin and Laboratory Work. , 2.2 State of Preservation -- 2.3 Frequency Analysis -- 2.4 Stable Oxygen Isotopes ( delta 18O) -- 3 Results -- 3.1 State of Preservation -- 3.2 Frequency Analysis -- 3.3 Stable Oxygen Isotopes ( delta 18O) -- 4 Discussion and Conclusions -- Acknowledgments -- References -- 20 Functional Diversity and Traits Assembly Patterns of Benthic Macrofaunal Communities in the Southern North Sea -- Abstract -- 1 Introduction -- 2 Material and Methods -- 3 Results -- 4 Discussion -- Acknowledgments -- 21 Snow Accumulation in North Greenland over the Last Millennium -- Abstract -- 1 Introduction -- 2 Methods -- 3 Results -- 4 Discussion and Conclusion -- References -- 22 Seismostratigraphic Analysis and Glacial History of the Weddell Sea Region, Antarctica -- Abstract -- 1 Introduction -- 2 Data and Methods -- 3 Results -- 3.1 Seismic Characteristics and Horizon Stratigraphy -- 3.2 Sedimentation Rates -- 4 Discussion and Conclusions -- Acknowledgments -- References -- Part VII Geoinformatics -- 23 Visual Analysis of Relevant Fields in Geoscientific Multifield Data -- Abstract -- 1 Introduction -- 2 Related Work -- 3 Field Similarity Plot -- 4 Interactive Visual Analysis -- 5 Use Cases -- 5.1 Multifield -- 5.2 Time-Varying Field -- 6 Discussion -- 7 Conclusion -- Acknowledgements -- References -- 24 A Database Language More Suitable for the Earth System Sciences -- Abstract -- 1 Introduction -- 2 Data Model -- 3 Query Language -- 3.1 Array Construction -- 3.2 Array Inspection Operators -- 3.3 Array Aggregation -- 3.4 Derived Operators -- 3.5 Array \leftrightarrow Table Conversion -- 3.6 Array \leftrightarrow LOB Conversion -- 4 Implementation -- 5 Conclusion -- Acknowledgments -- References -- 25 Towards Collaborative Exploration and Analysis of Big Data from Mars: A Noachis Terra Case Study -- Abstract -- 1 Introduction -- 2 Data and Methods. , 3 Noachis Terra Case Study -- 4 Discussion -- 5 Conclusions -- Acknowledgments -- References.
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  • 2
    Keywords: Earth System Sciences ; Physical geography. ; Atmospheric sciences. ; Geography
    Description / Table of Contents: 1 Earth System Science - past experiences and future trends -- 2 The educational program of the Earth System Science Research School (ESSReS) -- 3 Time evolution of a PhD student's mood - A review of my time as PhD student in the research school ESSReS -- 4 Progress in Earth System Science: What does it take to make our ideas clear -- 5 Towards a better tropospheric ozone product from SCIAMACHY: improvements in high latitude stratospheric ozone -- 6 Ten-year SCIAMACHY Stratospheric Aerosol data record: Signature of the Secondary Meridional Circulation associated with the Quasi-Biennial Oscillation in the Tropical Stratosphere -- 7 Investigating the link between glyoxal and biogenic activities -- 8 Estimates of NOx emission factors from GOME-2 measurements for the major types of open biomass burning -- 9 The use of FTIR-spectrometry in combination with different biosphere-atmosphere flux measurement techniques -- 10 Near-infrared lunar absorption spectroscopy for the retrieval of column averaged CO2 and CH4 -- 11 A new method to filter out radio-frequency interference (RFI) from SMOS level 1C data for sea ice applications -- 12 Arctic Multiyear Ice Concentration Retrieval from SSM/I data using the NASA Team algorithm with dynamic tie points -- 13 Detecting CDOM fluorescence using high spectrally resolved satellite data: a model study -- 14 The flow of dense water plumes in the western Weddell Sea simulated with the Finite Element Ocean Model (FEOM) -- 15 Data analysis and modeling of the Amundsen Sea embayment -- 16 Impact of sea-ice bottom topography on the Ekman pumping -- 17 Classification of CryoSat-2 radar echoes -- 18 Integration of passive tracers in a three-dimensional ice sheet model -- 19 Bivalve shells - unique high-resolution archives of environmental past -- 20 Functional diversity and traits assembly patterns of benthic macrofaunal communities in the southern North Sea -- 21 Snow accumulation in North Greenland over the last millennium -- 22 Seismostratigraphic analysis and glacial history of the Weddell Sea region, Antarctica -- 23 Visual analysis of Relevant Fields in Geoscientific Multifield Data -- 24 A Database Language Suitable for the Earth System Sciences -- 25 Towards Collaborative Exploration and Analysis of Big Data from Mars: A Noachis Terra Case Study
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (X, 251 p. 86 illus., 83 illus. in color)
    Edition: 1st ed. 2015
    ISBN: 9783319138657
    Series Statement: Springer Earth System Sciences
    Language: English
    Note: Description based upon print version of record , 1 Earth System Science - past experiences and future trends2 The educational program of the Earth System Science Research School (ESSReS) -- 3 Time evolution of a PhD student's mood - A review of my time as PhD student in the research school ESSReS -- 4 Progress in Earth System Science: What does it take to make our ideas clear -- 5 Towards a better tropospheric ozone product from SCIAMACHY: improvements in high latitude stratospheric ozone -- 6 Ten-year SCIAMACHY Stratospheric Aerosol data record: Signature of the Secondary Meridional Circulation associated with the Quasi-Biennial Oscillation in the Tropical Stratosphere -- 7 Investigating the link between glyoxal and biogenic activities -- 8 Estimates of NOx emission factors from GOME-2 measurements for the major types of open biomass burning -- 9 The use of FTIR-spectrometry in combination with different biosphere-atmosphere flux measurement techniques -- 10 Near-infrared lunar absorption spectroscopy for the retrieval of column averaged CO2 and CH4 -- 11 A new method to filter out radio-frequency interference (RFI) from SMOS level 1C data for sea ice applications -- 12 Arctic Multiyear Ice Concentration Retrieval from SSM/I data using the NASA Team algorithm with dynamic tie points -- 13 Detecting CDOM fluorescence using high spectrally resolved satellite data: a model study -- 14 The flow of dense water plumes in the western Weddell Sea simulated with the Finite Element Ocean Model (FEOM) -- 15 Data analysis and modeling of the Amundsen Sea embayment -- 16 Impact of sea-ice bottom topography on the Ekman pumping -- 17 Classification of CryoSat-2 radar echoes -- 18 Integration of passive tracers in a three-dimensional ice sheet model -- 19 Bivalve shells - unique high-resolution archives of environmental past -- 20 Functional diversity and traits assembly patterns of benthic macrofaunal communities in the southern North Sea -- 21 Snow accumulation in North Greenland over the last millennium -- 22 Seismostratigraphic analysis and glacial history of the Weddell Sea region, Antarctica -- 23 Visual analysis of Relevant Fields in Geoscientific Multifield Data -- 24 A Database Language Suitable for the Earth System Sciences -- 25 Towards Collaborative Exploration and Analysis of Big Data from Mars: A Noachis Terra Case Study.
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  • 3
    Online Resource
    Online Resource
    Berlin, Heidelberg : Springer
    Keywords: Geography ; Computer science ; Computer science Mathematics ; Earth Sciences ; Physical geography. ; Programming languages (Electronic computers). ; Physics. ; Computer mathematics. ; Geowissenschaften ; Numerisches Modell ; FORTRAN 95
    Description / Table of Contents: This work provides a short "getting started" guide to Fortran 90/95. The main target audience consists of newcomers to the field of numerical computation within Earth system sciences (students, researchers or scientific programmers). Furthermore, readers accustomed to other programming languages may also benefit from this work, by discovering how some programming techniques they are familiar with map to Fortran 95. The main goal is to enable readers to quickly start using Fortran 95 for writing useful programs. It also introduces a gradual discussion of Input/Output facilities relevant for Earth system sciences, from the simplest ones to the more advanced netCDF library (which has become a de facto standard for handling the massive datasets used within Earth system sciences). While related works already treat these disciplines separately (each often providing much more information than needed by the beginning practitioner), the reader finds in this book a shorter guide which links them. Compared to other books, this work provides a much more compact view of the language, while also placing the language-elements in a more applied setting, by providing examples related to numerical computing and more advanced Input/Output facilities for Earth system sciences. Naturally, the coverage of the programming language is relatively shallow, since many details are skipped. However, many of these details can be learned gradually by the practitioner, after getting an overview and some practice with the language through this book
    Type of Medium: Online Resource
    Pages: Online-Ressource (XXII, 250 p. 15 illus., 10 illus. in color, online resource)
    ISBN: 9783642370090
    Series Statement: SpringerLink
    Language: English
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  • 4
    Keywords: Forschungsbericht ; Nordpolarmeer ; Paläoklima
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (73 Seiten, 20,91 MB) , Diagramme, Illustrationen
    Language: German
    Note: Förderkennzeichen BMBF 03F0704A. - Verbund-Nummer 01153698 , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden
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  • 5
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    National Academy of Sciences
    In:  PNAS Proceedings of the National Academy of Sciences of the United States of America, 115 (21). pp. 5365-5370.
    Publication Date: 2021-02-08
    Description: The Pacific hosts the largest oxygen minimum zones (OMZs) in the world ocean, which are thought to intensify and expand under future climate change, with significant consequences for marine ecosystems, biogeochemical cycles, and fisheries. At present, no deep ventilation occurs in the North Pacific due to a persistent halocline, but relatively better-oxygenated subsurface North Pacific Intermediate Water (NPIW) mitigates OMZ development in lower latitudes. Over the past decades, instrumental data show decreasing oxygenation in NPIW; however, long-term variations in middepth ventilation are potentially large, obscuring anthropogenic influences against millennial-scale natural background shifts. Here, we use paleoceanographic proxy evidence from the Okhotsk Sea, the foremost North Pacific ventilation region, to show that its modern oxygenated pattern is a relatively recent feature, with little to no ventilation before six thousand years ago, constituting an apparent Early–Middle Holocene (EMH) threshold or “tipping point.” Complementary paleomodeling results likewise indicate a warmer, saltier EMH NPIW, different from its modern conditions. During the EMH, the Okhotsk Sea switched from a modern oxygenation source to a sink, through a combination of sea ice loss, higher water temperatures, and remineralization rates, inhibiting ventilation. We estimate a strongly decreased EMH NPIW oxygenation of ∼30 to 50%, and increased middepth Pacific nutrient concentrations and carbon storage. Our results (i) imply that under past or future warmer-than-present conditions, oceanic biogeochemical feedback mechanisms may change or even switch direction, and (ii) provide constraints on the high-latitude North Pacific’s influence on mesopelagic ventilation dynamics, with consequences for large oceanic regions.
    Type: Article , PeerReviewed
    Format: text
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  • 6
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    Cambridge Univ. Press
    In:  Journal of Glaciology, 64 (244). pp. 227-235.
    Publication Date: 2018-12-17
    Description: The positive degree-day (PDD) model provides a particularly simple approach to estimate surface melt from land ice based solely on air temperature. Here, we use a climate and snow pack simulation of the Greenland ice sheet (Modèle Atmosphérique Régional, MAR) as a reference, to analyze this scheme in three realizations that incorporate the sub-monthly temperature variability differently: (i) by local values, (ii) by local values that systematically overestimate the dampened variability associated with intense melting or (iii) by one constant value. Local calibrations reveal that incorporating local temperature variability, particularly resolving the dampened variability of melt areas, renders model parameters more temperature-dependent. This indicates that the negative feedback between surface melt and temperature variability introduces a non-linearity into the temperature – melt relation. To assess the skill of the individual realizations, we hindcast melt rates from MAR temperatures for each realization. For this purpose, we globally calibrate Greenland-wide, constant parameters. Realization (i) exhibits shortcomings in the spatial representation of surface melt unless temperature-dependent instead of constant parameters are calibrated. The other realizations perform comparatively well with constant parametrizations. The skill of the PDD model primarily depends, however, on the consistent calibration rather than on the specific representation of variability.
    Type: Article , PeerReviewed
    Format: text
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  • 7
    Publication Date: 2020-06-18
    Description: Paleo-climate records and geodynamic modelling indicate the existence of complex interactions between glacial sea level changes, volcanic degassing and atmospheric CO2, which may have modulated the climate system's descent into the last ice age. Between ∼85 and 70 kyr ago, during an interval of decreasing axial tilt, the orbital component in global temperature records gradually declined, while atmospheric CO2, instead of continuing its long-term correlation with Antarctic temperature, remained relatively stable. Here, based on novel global geodynamic models and the joint interpretation of paleo-proxy data as well as biogeochemical simulations, we show that a sea level fall in this interval caused enhanced pressure-release melting in the uppermost mantle, which may have induced a surge in magma and CO2 fluxes from mid-ocean ridges and oceanic hotspot volcanoes. Our results reveal a hitherto unrecognized negative feedback between glaciation and atmospheric CO2 predominantly controlled by marine volcanism on multi-millennial timescales of ∼5,000-15,000 years.
    Type: Article , PeerReviewed
    Format: text
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  • 8
    Publication Date: 2018-12-17
    Description: Recent global warming is pronounced in high-latitude regions (e.g. northern Asia), and will cause the vegetation to change. Future vegetation trends (e.g. the “arctic greening”) will feed back into atmospheric circulation and the global climate system. Understanding the nature and causes of past vegetation changes is important for predicting the composition and distribution of future vegetation communities. Fossil pollen records from 468 sites in northern and eastern Asia were biomised at selected times between 40 cal ka bp and today. Biomes were also simulated using a climate-driven biome model and results from the two approaches compared in order to help understand the mechanisms behind the observed vegetation changes. The consistent biome results inferred by both approaches reveal that long-term and broad-scale vegetation patterns reflect global- to hemispheric-scale climate changes. Forest biomes increase around the beginning of the late deglaciation, become more widespread during the early and middle Holocene, and decrease in the late Holocene in fringe areas of the Asian Summer Monsoon. At the southern and southwestern margins of the taiga, forest increases in the early Holocene and shows notable species succession, which may have been caused by winter warming at ca. 7 cal ka bp. At the northeastern taiga margin (central Yakutia and northeastern Siberia), shrub expansion during the last deglaciation appears to prevent the permafrost from thawing and hinders the northward expansion of evergreen needle-leaved species until ca. 7 cal ka bp. The vegetation-climate disequilibrium during the early Holocene in the taiga-tundra transition zone suggests that projected climate warming will not cause a northward expansion of evergreen needle-leaved species.
    Type: Article , PeerReviewed
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  • 9
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    AGU (American Geophysical Union) | Wiley
    In:  Journal of Advances in Modeling Earth Systems, 9 (5). pp. 2027-2045.
    Publication Date: 2018-12-17
    Description: Understanding the dynamics of warm climate states has gained increasing importance in the face of anthropogenic climate change, and while it is possible to simulate warm interglacial climates, these simulated results cannot be evaluated without the aid of geochemical proxies. One such proxy is δ18O, which allows for inference about both a climate state's hydrology and temperature. We utilize a stable water isotope equipped climate model to simulate three stages during the Last Interglacial (LIG), corresponding to 130, 125, and 120 kyr before present, using forcings for orbital configuration as well as greenhouse gases. We discover heterogeneous responses in the mean δ18O signal to the climate forcing, with large areas of depletion in the LIG δ18O signal over the tropical Atlantic, the Sahel, and the Indian subcontinent, and with enrichment over the Pacific and Arctic Oceans. While we find that the climatology mean relationship between δ18O and temperature remains stable during the LIG, we also discover that this relationship is not spatially consistent. Our results suggest that great care must be taken when comparing δ18O records of different paleoclimate archives with the results of climate models as both the qualitative and quantitative interpretation of δ18O variations as a proxy for past temperature changes may be problematic due to the complexity of the signals.
    Type: Article , PeerReviewed
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  • 10
    Publication Date: 2021-02-08
    Description: Stable water isotope records from Antarctica are key for our understanding of Quaternary climate variations. However, the exact quantitative interpretation of these important climate proxy records in terms of surface temperature, ice sheet height and other climatic changes is still a matter of debate. Here we report results obtained with an atmospheric general circulation model equipped with water isotopes, run at a high-spatial horizontal resolution of one-by-one degree. Comparing different glacial maximum ice sheet reconstructions, a best model data match is achieved for the PMIP3 reconstruction. Reduced West Antarctic elevation changes between 400 and 800 m lead to further improved agreement with ice core data. Our modern and glacial climate simulations support the validity of the isotopic paleothermometer approach based on the use of present-day observations and reveal that a glacial ocean state as displayed in the GLAMAP reconstruction is suitable for capturing the observed glacial isotope changes in Antarctic ice cores.
    Type: Article , PeerReviewed
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