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  • 1
    Monograph available for loan
    Monograph available for loan
    Amsterdam : Elsevier
    Call number: AWI G2-18-91738
    Type of Medium: Monograph available for loan
    Pages: XI, 716 Seiten , Illustrationen
    Edition: third edition
    ISBN: 9780123877826
    Language: English
    Note: Contents: Preface. - Acknowledgments. - 1. Data Acquisition and Recording. - 1.1 Introduction. - 1.2 Basic Sampling Requirements. - 1.3 Temperature. - 1.4 Salinity. - 1.5 Depth or Pressure. - 1.6 Sea-Level Measurement. - 1.7 Eulerian Currents. - 1.8 Lagrangian Current Measurements. - 1.9 Wind. - 1.10 Precipitation. - 1.11 Chemical Tracers. - 1.12 Transient Chemical Tracers. - 2. Data Processing and Presentation. - 2.1 Introduction. - 2.2 Calibration. - 2.3 Interpolation. - 2.4 Data Presentation. - 3. Statistical Methods and Error Handling. - 3.1 Introduction. - 3.2 Sample Distributions. - 3.3 Probability. - 3.4 Moments and Expected Values. - 3.5 Common PDFs. - 3.6 Central Limit Theorem. - 3.7 Estimation. - 3.8 Confidence Intervals. - 3.9 Selecting the Sample Size. - 3.10 Confidence Intervals for Altimeter-Bias Estimates. - 3.11 Estimation Methods. - 3.12 Linear Estimation (Regression). - 3.13 Relationship between Regression and Correlation. - 3.14 Hypothesis Testing. - 3.15 Effective Degrees of Freedom. - 3.16 Editing and Despiking Techniques: The Nature of Errors. - 3.17 Interpolation: Filling the Data Gaps. - 3.18 Covariance and the Covariance Matrix. - 3.19 The Bootstrap and Jackknife Methods. - 4. The Spatial Analyses of Data Fields. - 4.1 Traditional Block and Bulk Averaging. - 4.2 Objective Analysis. - 4.3 Kriging. - 4.4 Empirical Orrhogonal Functions. - 4.5 Extended Empirical Orrhogonal Functions. - 4.6 Cyclostationary EOFs. - 4.7 Factor Analysis. - 4.8 Normal Mode Analysis. - 4.9 Self Organizing Maps. - 4.10 Kalman Filters. - 4.11 Mixed Layer Depth Estimation. - 4.12 Inverse Methods. - 5. Time Series Analysis Methods. - 5.1 Basic Concepts. - 5.2 Stochastic Processes and Stationarity. - 5.3 Correlation Functions. - 5.4 Spectral Analysis. - 5.5 Spectral Analysis (Parametric Methods). - 5.6 Cross-Spectral Analysis. - 5.7 Wavelet Analysis. - 5.8 Fourier Analysis. - 5.9 Harmonic Analysis. - 5.10 Regime Shift Detection. - 5.11 Vector Regression. - 5.12 Fractals. - 6. Digital Filters. - 6.1 Introduction. - 6.2 Basic Concepts. - 6.3 Ideal Filters. - 6.4 Design of Oceanographic Filters. - 6.5 Running-Mean Filters. - 6.6 Godin-Type Filters. - 6.7 Lanczos-window Cosine Filters. - 6.8 Butterworth Filters. - 6.9 Kaiser-Bessel Filters. - 6.10 Frequency-Domain (Transform) Filtering. - References. - Appendix A: Units in Physical Oceanography. - Appendix B: Glossary of Statistical Terminology. - Appendix C: Means, Variances and Moment,Generating Functions for Some Common Continuous Variables. - Appendix D: Statistical Tables. - Appendix E: Correlation Coefficients at the 5% and 1% Levels of Significance for Various Degrees of Freedom v. - Appendix F: Approximations and Nondimensional Numbers in Physical Oceanography. - Appendix G: Convolution. - Index.
    Location: AWI Reading room
    Branch Library: AWI Library
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  • 2
    Monograph available for loan
    Monograph available for loan
    Oxford [u.a.] : Pergamon
    Call number: AWI G2-98-0260
    Description / Table of Contents: Data Analysis Methods in Physical Oceanography provides a comprehensive and practical compilation of the essential information and analysis techniques required for the advanced processing and interpretation of digital spatiatemporal data in physical oceanography as well in other branches of the geophysical sciences. This book assumes a fundamental understanding of calculus and is directed primarily towards scientists and engineers in industry, government and universities, including graduate and advanced undergraduate students. Spanning five chapters and numerous appendices, the book provides a valuable compendium of the fundamental data processing tools required by the marine scientist. Many of these tools will be of use in other branches of the physical and natural sciences. The book begins with detailed discussion of the instruments used to collect oceanographic data and the limitation of the resulting data. Data presentation and display methods are reviewed in chapter two. The remaining three chapters supply detailed information on a broad range of statistical and deterministic data analysis methods ranging from established methods such as Analysis of Variance methods and Principal Component Analysis, to more recent data analysis techniques such as Wavelet Transforms and Fractals. Each technique is illustrated by a worked example and a large number of references are given for the reader who may want to dig deeper into the subject. No other book of this type exists that brings together in one volume information on the measurement systems, data editing, data reduction/processing and analysis and interpretational. This book brings all of this information into a single volume which can act as a text for the neophyte or a reference volume for the experienced scientist. The book is both a guide and an encyclopaedia to modern data processing methods in the geophysical sciences. Many nonoceanographers should find this volume a handy reference on their shelves.
    Type of Medium: Monograph available for loan
    Pages: XVI, 634 S. : Ill., graph. Darst., Kt.
    Edition: 1st ed.
    ISBN: 0080314341
    Language: English
    Note: Contents: Preface. - Acknowledgments. - Chapter 1 Data Acquisition and Recording. - 1.1 Introduction. - 1.2 Basic sampling requirements. - 1.2.1 Sampling interval. - 1.2.2 Sampling duration. - 1.2.3 Sampling accuracy. - 1.2.4 Burst sampling versus continuous sampling. - 1.2.5 Regularly versus irregularly sampled data. - 1.2.6 Independent realizations. - 1.3 Temperature. - 1.3.1 Mercury thermometers. - 1.3.2 The mechanical bathythermograph (MBT). - 1.3.3 Resistance thermometers (expendable bathythermograph: XBT). - 1.3.4 Salinity/conductivity-temperature-depth profilers. - 1.3.5 Dynamic response of temperature sensors 19 1.3.6 Response times of CTD systems. - 1.3.7 Temperature calibration of STD/CTD profilers. - 1.3.8 Sea surface temperature. - 1.3.9 The modern digital thermometer. - 1.3.10 Potential temperature and density. - 1.4 Salinity. - 1.4.1 Salinity and electrical conductivity. - 1.4.2 The practical salinity scale. - 1.4.3 Nonconductive methods. - 1.5 Depth or pressure. - 1.5.1 Hydrostatic pressure. - 1.5.2 Free-fall velocity. - 1.5.3 Echo sounding. - 1.5.4 Other depth sounding methods. - 1.6 Sea-level measurement. - 1.6.1 Tide and pressure gauges. - 1.6.2 Satellite altimetry. - 1.6.3 Inverted echo sounder (IES). - 1.6.4 Wave height and direction. - 1.7 Eulerian currents. - 1.7.1 Early current meter technology. - 1.7.2 Rotor-type current meters. - 1.7.3 Nonmechanical current meters. - 1.7.4 Profiling acoustic Doppler current meters (ADCM). - 1.7.5 Comparisons of current meters. - 1.7.6 Electromagnetic methods. - 1.7.7 Other methods of current measurement. - 1.7.8 Mooring logistics. - 1.7.9 Acoustic releases. - 1.8 Lagrangian current measurements. - 1.8.1 Drift cards and bottles. - 1.8.2 Modern drifters. - 1.8.3 Processing satellite-tracked drifter data. - 1.8.4 Drifter response. - 1.8.5 Other types of surface drifters. - 1.8.6 Subsurface floats. - 1.8.7 Surface displacements in satellite imagery. - 1.9 Wind. - 1.10 Precipitation. - 1.11 Chemical tracers. - 1.11.1 Conventional tracers. - 1.11.2 Light attenuation and scattering. - 1.11.3 Oxygen isotope: δ18O. - 1.11.4 Helium-3; helium/heat ratio. - 1.12 Transient chemical tracers. - 1.12.1 Tritium. - 1.12.2 Radiocarbon. - 1.12.3 Chlorofluorocarbons. - 1.12.4 Radon-222. - 1.12.5 Sulfur hexachloride. - 1.12.6 Strontium-90. - Chapter 2 Data Processing and Presentation. - 2.1 Introduction. - 2.2 Calibration. - 2.3 Interpolation. - 2.4 Data presentation. - 2.4.1 Introduction. - 2.4.2 Vertical profiles. - 2.4.3 Vertical sections. - 2.4.4 Horizontal maps. - 2.4.5 Map projections. - 2.4.6 Characteristic or property versus property diagrams. - 2.4.7 Time-series presentation. - 2.4.8 Histograms. - 2.4.9 New directions in graphical presentation. - Chapter 3 Statistical Methods and Error Handling. - 3.1 Introduction. - 3.2 Sample distributions. - 3.3 Probability. - 3.3.1 Cumulative probability functions. - 3.4 Moments and expected values. - 3.4.1 Unbiased estimators and moments. - 3.4.2 Moment generating functions. - 3.5 Common probability density functions. - 3.6 Central limit theorem. - 3.7 Estimation. - 3.8 Confidence intervals. - 3.8.1 Confidence interval for μ (σ known) 3.8.2 Confidence interval for μ (σ unknown) 3.8.3 Confidence interval for σ^2. - 3.8.4 Goodness-of-fit test. - 3.9 Selecting the sample size. - 3.10 Confidence intervals for altimeter bias estimates. - 3.11 Estimation methods. - 3.11.1 Minimum variance unbiased estimation. - 3.11.2 Method of moments. - 3.11.3 Maximum likelihood. - 3.12 Linear estimation (regression). - 3.12.1 Method of least squares. - 3.12.2 Standard error of the estimate. - 3.12.3 Multivariate regression. - 3.12.4 A computational example of matrix regression. - 3.12.5 Polynomial curve fitting with least squares. - 3.12.6 Relationship between least-squares and maximum likelihood. - 3.13 Relationship between regression and correlation. - 3.13.1 The effects of random errors on correlation. - 3.13.2 The maximum likelihood correlation estimator. - 3.13.3 Correlation and regression: cause and effect. - 3.14 Hypothesis testing. - 3.14.1 Significance levels and confidence intervals for correlation. - 3.14.2 Analysis of variance and the F-distribution. - 3.15 Effective degrees of freedom. - 3.1 5.1 Trend estimates and the integral time scale. - 3.16 Editing and despiking techniques: the nature of errors. - 3.16.1 Identifying and removing errors. - 3.16.2 Propagation of error. - 3.16.3 Dealing with numbers: the statistics of roundoff. - 3.16.4 Gauss-Markov theorem. - 3.17 Interpolation: filling the data gaps. - 3.17.1 Equally and unequally spaced data. - 3.17.2 Interpolation methods. - 3.17.3 Interpolating gappy records: practical examples. - 3.18 Covariance and the covariance matrix. - 3.18.1 Covariance and structure functions. - 3.18.2 A computational example. - 3.18.3 Multivariate distributions. - 3.19 Bootstrap and jackknife methods. - 3.19.1 Bootstrap method. - 3.19.2 Jackknife method. - Chapter 4 The Spatial Analyses of Data Fields. - 4.1 Traditional block and bulk averaging. - 4.2 Objective analysis. - 4.2.1 Objective mapping: examples. - 4.3 Empirical orthogonal functions. - 4.3.1 Principal axes of a single vector time series (scatter plot). - 4.3.2 EOF computation using the scatter matrix method. - 4.3.3 EOF computation using singular value decomposition. - 4.3.4 An example: deep currents near a mid-ocean ridge. - 4.3.S Interpretation of EOFs. - 4.3.6 Variations on conventional EOF analysis. - 4.4 Normal mode analysis. - 4.4.1 Vertical normal modes. - 4.4.2 An example: normal modes of semidiurnal frequency. - 4.4.3 Coastal-trapped waves (CTWs). - 4.5 Inverse methods. - 4.5.1 General inverse theory. - 4.5.2 Inverse theory and absolute currents. - 4.5.3 The IWEX internal wave problem. - 4.5.4 Summary of inverse methods. - Chapter 5 Time-series Analysis Methods. - 5.1 Basic concepts. - 5.2 Stochastic processes and stationarity. - 5.3 Correlation functions. - 5.4 Fourier analysis. - 5.4.1 Mathematical formulation. - 5.4.2 Discrete time series. - 5.4.3 A computational example. - 5.4.4 Fourier analysis for specified frequencies. - 5.4.5 The fast Fourier transform. - 5.5 Harmonic analysis. - 5.5.1 A least-squares method. - 5.5.2 A computational example. - 5.5.3 Harmonic analysis of tides. - 5.5.4 Choice of constituents. - 5.5.5 A computational example for tides. - 5.5.6 Complex demodulation. - 5.6 Spectral analysis. - 5.6.1 Spectra of deterministic and stochastic processes. - 5.6.2 Spectra of discrete series. - 5.6.3 Conventional spectral methods. - 5.6.4 Spectra of vector series. - 5.6.5 Effect of sampling on spectral estimates. - 5.6.6 Smoothing spectral estimates (windowing). - 5.6.7 Smoothing spectra in the frequency domain. - 5.6.8 Confidence intervals on spectra. - 5.6.9 Zero-padding and prewhitening. - 5.6.10 Spectral analysis of unevenly spaced time series. - 5.6.11 General spectral bandwidth and Q of the system. - 5.6.12 Summary of the standard spectral analysis approach. - 5.7 Spectral analysis (parametric methods). - 5.7.1 Some basic concepts. - 5.7.2 Autoregressive power spectral estimation. - 5.7.3 Maximum likelihood spectral estimation. - 5.8 Cross-spectral analysis. - 5.8.1 Cross-correlation functions. - 5.8.2 Cross-covariance method. - 5.8.3 Fourier transform method. - 5.8.4 Phase and cross-amplitude functions. - 5.8.S Coincident and quadrature spectra. - 5.8.6 Coherence spectrum (coherency). - 5.8.7 Frequency response of a linear system. - 5.8.8 Rotary cross-spectral analysis. - 5.9 Wavelet analysis. - 5.9.1 The wavelet transform. - 5.9.2 Wavelet algorithms. - 5.9.3 Oceanographic examples. - 5.9.4 The S-transformation. - 5.9.5 The multiple filter technique. - 5.10 Digital filters. - 5.10.1 Introduction. - 5.10.2 Basic concepts. - 5.10.3 Ideal filters. -
    Location: AWI Reading room
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  • 3
    Monograph available for loan
    Monograph available for loan
    Oxford [u.a.] : Pergamon Pr.
    Call number: PIK N 454-11-0294
    Description / Table of Contents: Contents: 1. Introduction ; 2. Ocean dimensions, shapes and bottom materials ; 3. Physical properties of sea-water ; 4. Typical distributions of water characteristics in the oceans ; 5. Water, salt and heat budgets of the oceans ; 6. Instruments and methods ; 7. Circulation and water masses of the oceans ; 8. Coastal oceanography ; 9. Some directions for future work
    Type of Medium: Monograph available for loan
    Pages: XV, 320 S. : Ill., graph. Darst., Kt.
    Edition: 5. enl. ed. (in SI units)
    ISBN: 0080379524
    Location: A 18 - must be ordered
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  • 4
    Publication Date: 2017-04-04
    Description: Remote sensing sensors for detecting urban damage and other surface changes due to earthquakes is gaining increasing interest. To this aim optical images can represent useful tools for this application thanks their very high ground geometric resolution, especially when more frequent revisit times will be feasible with the implementation of new missions and future possible constellations of satellites. Sub-meter resolution images at visible frequencies are able to provide information at the scale of a single building. This kind of information is extremely important if provided with sufficient timeliness to rescue teams. In this work, the earthquake that hit the ancient city of Bam, Iran, on December 26th, 2003 has been investigated. The urban area was very close to the epicenter of the seism which caused strong damage to the urban structures. Pre- and post-earthquake Quickbird panchromatic images have been used to show the capability of this data to map damage at building scale by means of segmentation approach based on the application of morphological operators. A validation process has been performed by comparing the map of damage levels at single building scale with a detailed ground-based damage map provided by in situ survey.
    Description: Published
    Description: Boston, Massachusetts, USA
    Description: 1.10. TTC - Telerilevamento
    Description: reserved
    Keywords: very high hesolution ; classification ; damage detection ; earthquake ; 04. Solid Earth::04.06. Seismology::04.06.10. Instruments and techniques
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Conference paper
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  • 5
    Publication Date: 2017-04-04
    Description: In this paper, we investigate the performance of pulse-coupled neural networks (PCNNs) to detect the damage caused by an earthquake. PCNN is an unsupervised model in the sense that it does not need to be trained, which makes it an operational tool during crisis events when it is crucial to produce damage maps as soon as the post-event images are available. The damage map resulting from PCNN was validated at a block scale of 120x120m using ground truth obtained by a combination of ground survey and visual inspection of the before- and after-event images. The comparison showed agreement between the change measured by PCNN on block scale and the damage occurred.
    Description: Published
    Description: Honolulu, Hawaii, USA
    Description: 1.10. TTC - Telerilevamento
    Description: reserved
    Keywords: neural networks ; damage detection
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Boundary layer meteorology 82 (1997), S. 439-474 
    ISSN: 1573-1472
    Keywords: Air-sea interaction ; cool skin ; freshwater skin ; rainfall
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Rainfall over the sea modifies the molecular boundary layers of the upper ocean through a variety of different effects. These cover the freshwater flux stabilizing the near-surface layer, additional heat flux established due to rain versus surface temperature differences, modification of physical parameters by temperature and salinity changes, enhancement of the surface roughness, damping of short gravity waves, surface mixing by rain, and transfer of additional momentum from air to sea. They are separately described and included in our surface renewal model to investigate the rain's influence on the cool skin of the ocean and the creation of a haline molecular diffusion layer. Simulations with the upgraded model show that the most important effect on the conductive layer is that of reduced renewal periods followed by additional surface cooling due to rain on the order of 0.1 K. At rain rates below 50 mm h-1 rainfall is not able to completely destroy the mean temperature difference across the cool skin. A freshwater skin is created that exhibits a salinity difference exceeding 4‰ under strong rainfall. Comparisons with field data of the cool skin taken during the Coupled Ocean Atmosphere Response Experiment confirm the upgraded renewal model. Surface salinity measurements taken during the same field campaign are consistent with the calculated salinity differences across the freshwater skin. The enhancement of surface roughness by natural rain is less pronounced than described in earlier laboratory studies of rain with large drop sizes only.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Ocean dynamics 40 (1987), S. 261-276 
    ISSN: 1616-7228
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Zusammenfassung Es werden zweimonatliche Bathythermographenschnitte zwischen Europa und Brasilien vom September 1980 bis Mai 1984 vorgestellt. Die Daten werden zur Darstellung eines mehrjährigen Trends im oberflächennahen äquatorialen Stromsystem verwandt, welches senkrecht zu den Schnitten liegt. Unter Ausnutzung einer mittleren Temperatur-Salzgehaltsbeziehung werden die Temperaturprofile in Dichteprofile überführt. Aus diesen wird die dynamische Tiefe (0/300 dbar) errechnet. In Äquatornähe wird eine rechnerische Näherung für die geostrophischen Ströme verwandt. Ferner wird ein Spline-Interpolationsverfahren für die raumzeitliche Herleitung der quasi-meridionalen Strömungsverteilung genutzt. Das äquatoriale Stromsystem wird als eine Zeitserie der dynamischen Tiefe und der geostrophischen Ströme dargestellt.
    Abstract: Résumé Des coupes thermiques au moyen de Bathythermographes à tête perdue (XBT) entre l'Europe et le Brésil environ deux fois par mois de septembre 1980 à mai 1984 sont utilisées pour caracteriser des tendances dans les courants géostrophiques équatoriaux perpendiculaires à ces coupes. Les profils de température dans les couches superficielles sont convertis en profils de densité au moyen de relations temperature-salinité moyennes, et permettent de calculer la hauteur dynamique 0/300 db. Après interpolation (spline) dans le temps et l'espace, on obtient une série spatio-temporelle, présentée sous la forme de cartes trimestrielles de hauteurs dynamiques et de courants géostrophiques.
    Notes: Summary Approximately twice-monthly expendable bathythermograph (XBT) sections between Europe and Brazil, are used to characterize trends in the equatorial geostrophic surface currents orthogonal to the sections between September, 1980 and May, 1984. Using mean temperature-salinity relationships the upper layer temperature profiles are converted to density and used to compute 0/300 db dynamic height. Applying a second derivative method, at and near the equator, geostrophic surface currents are computed along each quasimeridional XBT section and time/space series of the equatorial currents are developed using spline interpolations in both time and space. Equatorial currents are mapped as time series of dynamic height and geostrophic current.
    Type of Medium: Electronic Resource
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  • 8
    Publication Date: 1997-03-01
    Print ISSN: 0006-8314
    Electronic ISSN: 1573-1472
    Topics: Geosciences , Physics
    Published by Springer
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  • 9
    Publication Date: 1990-05-01
    Print ISSN: 0143-1161
    Electronic ISSN: 1366-5901
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Published by Taylor & Francis
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  • 10
    Publication Date: 2012-10-26
    Print ISSN: 0143-1161
    Electronic ISSN: 1366-5901
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Published by Taylor & Francis
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