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  • 1
    Call number: AWI A14-13-0083 ; ad AWI A14-13-0083
    Description / Table of Contents: This handbook provides the first comprehensive review of measurement principles, instruments and processing techniques for airborne observation of the earth's atmosphere and surface. For each field, the major prinicples of measurement are presented and illustrated with commonly-used airborne instruments, to assess the present capabilities in terms of accuracy, to raise awareness of specific issues with the interpretation of measurements from airborne operations, and to review emerging measurement techniques. The authors are internationally-recognized experts in their field, who actively contribute to the design and developement of modern airborne instrumentation and processing techniques. While primarily intended for climate, geophysical and atmospheric researchers, its relevance to the solar system makes this work useful to astronomers studying planetary atmospheres with telescopes and space probes.
    Type of Medium: Monograph available for loan
    Pages: XXXII, 655 S. : Ill., graph. Darst.
    ISBN: 9783527409969
    Series Statement: Wiley series in atmospheric physics and remote sensing
    Note: Contents: Preface. - A Tribute to Dr. Robert Knollenberg. - List of Contributors. - 1 Introduction to Airborne Measurements of the Earth Atmosphereand Surface. - 2 Measurement of Aircraft State and Thermodynamic and Dynamic Variables. - 2.1 Introduction. - 2.2 Historical. - 2.3 Aircraft State Variables. - 2.4 Static Air Pressure. - 2.5 Static Air Temperature. - 2.6 Water Vapor Measurements. - 2.7 Three-Dimensional Wind Vector. - 2.8 Small-Scale Turbulence. - 2.9 Flux Measurements. - 3 In SituTrace Gas Measurements. - 3.1 Introduction. - 3.2 Historical and Rationale. - 3.3 Aircraft Inlets for Trace Gases. - 3.4 Examples of Recent Airborne Missions. - 3.5 Optical In SituTechniques. - 3.6 Chemical Ionization Mass Spectrometry. - 3.7 Chemical Conversion Techniques. - 3.8 Whole Air Sampler and Chromatographic Techniques. - 4 In Situ Measurements of Aerosol Particles. - 4.1 Introduction. - 4.2 Aerosol Particle Number Concentration. - 4.3 Aerosol Particle Size Distribution. - 4.4 Chemical Composition of Aerosol Particles. - 4.5 Aerosol Optical Properties. - 4.6 CCN and IN. - 4.7 Challenges and Emerging Techniques. - 5 In Situ Measurements of Cloud and Precipitation Particles. - 5.1 Introduction. - 5.2 Impaction and Replication. - 5.3 Single-Particle Size and Morphology Measurements. - 5.4 Integral Properties of an Ensemble of Particles. - 5.5 Data Analysis. - 5.6 Emerging Technologies. - 6 Aerosol and Cloud Particle Sampling. - 6.1 Introduction. - 6.2 Aircraft Influence. - 6.3 Aerosol Particle Sampling. - 6.4 Cloud Particle Sampling. - 6.5 Summary and Guidelines. - 7 Atmospheric Radiation Measurements. - 7.1 Motivation. - 7.2 Fundamentals. - 7.3 Airborne Instruments for Solar Radiation. - 7.4 Terrestrial Radiation Measurements from Aircraft. - 8 Hyperspectral Remote Sensing. - 8.1 Introduction. - 8.2 Definition. - 8.3 History. - 8.4 Sensor Principles. - 8.5 HRS Sensors. - 8.6 Potential and Applications. - 8.7 Planning of an HRS Mission. - 8.8 Spectrally Based Information. - 8.9 Data Analysis. - 8.10 Sensor Calibration. - 8.11 Summary and Conclusion. - 9 LIDAR and RADAR Observations. - 9.1 Historical. - 9.2 Introduction. - 9.3 Principles of LIDAR and RADAR Remote Sensing. - 9.4 LIDAR Atmospheric Observations and Related Systems. - 9.5 Cloud and Precipitation Observations with RADAR. - 9.6 Results of Airborne RADAR Observations - Some Examples. - 9.7 Parameters Derived from Combined Use of LIDAR and RADAR. - 9.8 Conclusion and Perspectives. - Appendix A: Supplementary Online Material. - Color Plates. - List of Abbreviations. - Constants. - References. - Index
    Branch Library: AWI Library
    Branch Library: AWI Library
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  • 2
    Call number: MOP 47869 / Mitte
    Type of Medium: Dissertations
    Pages: 117, XXIII, 4 Blätter , Diagramme , 30 cm
    Language: German
    Note: Dissertation, Universität Leipzig, 1992
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 3
    Series available for loan
    Series available for loan
    Leipzig : Inst. für Meteorologie der Univ.
    Associated volumes
    Call number: ZS-265(31)
    In: Wissenschaftliche Mitteilungen aus dem Institut für Meteorologie der Universität Leipzig
    Type of Medium: Series available for loan
    Pages: iv, 174 S.
    ISBN: 3980882217
    Series Statement: Wissenschaftliche Mitteilungen aus dem Institut für Meteorologie der Universität Leipzig Leipzig 31
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    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 4
    Call number: AWI A7-20-93463
    Description / Table of Contents: Die Arktis erwärmt sich schneller als der Rest der Erde. Die Auswirkungen manifestieren sich unter Anderem in einer verstärkten Erwärmung der arktischen Grenzschicht. Diese Arbeit befasst sich mit Wechselwirkungen zwischen synoptischen Zyklonen und der arktischen Atmosphäre auf lokalen bis überregionalen Skalen. Ausgangspunkt dafür sind Messdaten und Modellsimulationen für den Zeitraum der N-ICE2015 Expedition, die von Anfang Januar bis Ende Juni 2015 im arktischen Nordatlantiksektor stattgefunden hat. Anhand von Radiosondenmessungen lassen sich Auswirkungen von synoptischen Zyklonen am deutlichsten im Winter erkennen, da sie durch die Advektion warmer und feuchter Luftmassen in die Arktis den Zustand der Atmosphäre von einem strahlungs-klaren in einen strahlungs-opaken ändern. Obwohl dieser scharfe Kontrast nur im Winter existiert, zeigt die Analyse, dass der integrierte Wasserdampf als Indikator für die Advektion von Luftmassen aus niedrigen Breiten in die Arktis auch im Frühjahr geeignet ist. Neben der Advektion von…
    Type of Medium: Dissertations
    Pages: xiv, 147 Seiten , Illustrationen, Diagramme
    Language: German
    Note: Inhaltsverzeichnis 1 Einleitung 1.1Wissenschaftliche Zielsetzung 2 Grundlagen 2.1 Grundgleichungen 2.2 Potentielle Vorticity 2.3 Planetare Wellen 2.4 Atmosphärische Instabilität 2.5 Grenzschicht 2.6 Kopplung von Tropo- und Stratosphäre 3 Daten und Methoden 3.1 N-ICE2015 3.1.1 Expeditionsbeschreibung 3.1.2 Ziele der Expedition 3.2 Daten 3.2.1 Beobachtungsdaten 3.2.2 ERA-Interim Reanalyse 3.2.3 Das HIRHAM5 Modell 3.3 Analysemethoden 3.3.1 Temperaturinversionen 3.3.2 Vertikale Stabilität 3.3.3 Grenzschichthöhe 3.3.4 Eady Growth Rate 3.3.5 2d-Skalenfilterung und -Pattern-Korrelation 3.3.6 Nudging Experiment 4 Analyse der N-ICE2015 Radiosonden 4.1 Blick auf die Troposphäre 4.2 Fallstudie zum M2-Sturm: A 4.3 Zyklonencharakteristika 4.4 Temperaturinversionen und Stabilität 4.5 Vergleich mit ERA-Interim, SHEBA und Ny-Ålesund 4.6 Résumé der Expeditionsdaten 5 Nudging Studien mit HIRHAM5 5.1 Vergleich mit ERA-Interim 5.2 Vergleich der Simulationen 5.3 Fallstudie zum M2-Sturm: B 5.3.1 Synoptische Aktivität 5.4 Statistischer Vergleich 6 Einfluss der Stratosphäre 6.1 Stratosphäre im Winter 2014/2015 6.2 Fallstudie zum M2-Sturm: C 6.3 PV als Ladung 6.4 Résumé der Beobachtungen 7 Zusammenfassung und Ausblick A Zusätztliche Abbildungen B Literaturverzeichnis
    Location: AWI Reading room
    Branch Library: AWI Library
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  • 5
    Call number: AWI A4-20-93991
    Description / Table of Contents: Over the last decades, the Arctic regions of the earth have warmed at a rate 2–3 times faster than the global average– a phenomenon called Arctic Amplification. A complex, non-linear interplay of physical processes and unique pecularities in the Arctic climate system is responsible for this, but the relative role of individual processes remains to be debated. This thesis focuses on the climate change and related processes on Svalbard, an archipelago in the North Atlantic sector of the Arctic, which is shown to be a "hotspot" for the amplified recent warming during winter. In this highly dynamical region, both oceanic and atmospheric large-scale transports of heat and moisture interfere with spatially inhomogenous surface conditions, and the corresponding energy exchange strongly shapes the atmospheric boundary layer. In the first part, Pan-Svalbard gradients in the surface air temperature (SAT) and sea ice extent (SIE) in the fjords are quantified and characterized. This analysis is based on observational data from meteorological stations, operational sea ice charts, and hydrographic observations from the adjacent ocean, which cover the 1980–2016 period. [...]
    Type of Medium: Dissertations
    Pages: xv, 123 Seiten , Illustrationen, Diagramme
    Language: English
    Note: Dissertation, Universität Potsdam, 2019 , CONTENTS 1 Introduction 1.1 Context: A rapidly changing Arctic 1.1.1 Documentation of recent changes in the Arctic 1.1.2 Research relevance 1.1.3 Objective: Svalbard as a hotspot for climate change 1.2 Physical Background 1.2.1 Radiation and surface energy balance 1.2.2 Peculiarities of the Arctic climate system 1.2.3 Role of atmospheric circulation 1.3 The regional setup on Svalbard 2 data and methods 2.1 Data description 2.1.1 Era-Interim atmospheric reanalysis 2.1.2 Svalbard Station Meteorology 2.1.3 Sea Ice Extent 2.1.4 Ocean data products 2.1.5 FLEXTRA Trajectories 2.2 Statistical Methods 2.2.1 Trend estimation 2.2.2 Correlation 2.2.3 Coefficient of Determination 3 state of surface climate parameters: pan-svalbard differences 3.1 Motivation 3.2 Surface air temperature 3.2.1 Annual cycle 3.2.2 Annual temperature range 3.2.3 Long-term trends 3.3 Fjord Sea Ice coverage 3.3.1 Climatology 3.3.2 Sea ice cover trends 3.3.3 Regional classification across Svalbard 3.3.4 Drivers of regional differences 3.4 Discussion and Conclusion 3.5 Current state of climate projections for the Svalbard region 4 Air mass back trajectories 4.1 Methodology 4.2 Winter 4.2.1 Source Regions of Ny-Ålesund Air 4.2.2 Circulation changes 4.2.3 Quantification of Advective Warming 4.3 Summer 4.3.1 Source Regions of Ny-Ålesund Air 4.3.2 Circulation changes 4.3.3 Quantification of advective cooling 4.3.4 Observational Case Study: May/June 2017 4.4 Discussion and Conclusion 5 Changing drivers of the arctic near surface temperature budget 5.1 Winter 5.2 Summer 5.3 Summary 6 Summary and conclusion A Details on calculations A.1 SLP composite Index A.2 Derivation of coefficient of determination A.3 Temperature effect of changing source regions over time B Supplementary figures Bibliography
    Location: AWI Reading room
    Branch Library: AWI Library
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  • 6
    Publication Date: 2017-10-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , NonPeerReviewed
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  • 7
    Publication Date: 2017-10-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , NonPeerReviewed
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  • 8
    Publication Date: 2017-12-11
    Description: The optical-equivalent snow grain size affects the reflectivity of snow surfaces and, thus, the local surface energy budget in particular in polar regions. Therefore, the specific surface area (SSA), from which the optical snow grain size is derived, was observed for a 2-month period in central Antarctica (Kohnen research station) during austral summer 2013/14. The data were retrieved on the basis of ground-based spectral surface albedo measurements collected by the COmpact RAdiation measurement System (CORAS) and airborne observations with the Spectral Modular Airborne Radiation measurement sysTem (SMART). The snow grain size and pollution amount (SGSP) algorithm, originally developed to analyze spaceborne reflectance measurements by the MODerate Resolution Imaging Spectroradiometer (MODIS), was modified in order to reduce the impact of the solar zenith angle on the retrieval results and to cover measurements in overcast conditions. Spectral ratios of surface albedo at 1280 and 1100 nm wavelength were used to reduce the retrieval uncertainty. The retrieval was applied to the ground-based and airborne observations and validated against optical in situ observations of SSA utilizing an IceCube device. The SSA retrieved from CORAS observations varied between 27 and 89 m2 kg−1. Snowfall events caused distinct relative maxima of the SSA which were followed by a gradual decrease in SSA due to snow metamorphism and wind-induced transport of freshly fallen ice crystals. The ability of the modified algorithm to include measurements in overcast conditions improved the data coverage, in particular at times when precipitation events occurred and the SSA changed quickly. SSA retrieved from measurements with CORAS and MODIS agree with the in situ observations within the ranges given by the measurement uncertainties. However, SSA retrieved from the airborne SMART data slightly underestimated the ground-based results.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , NonPeerReviewed
    Format: application/pdf
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  • 9
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