Download or read book A Classification of Ice Crystal Habits Using Combined CPL and RSP Observations During the SEAC4RS Campaign written by Natalie Midzak and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Unique Ice Crystal Observations from the ICE Ball Field Campaign Combined with Model Simulations Elucidate Cirrus Development written by Marley Majetic and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cirrus clouds are ubiquitous over large spatial domains on Earth, yet the detailed morphology of the small ice crystals that compose these clouds is not well understood. Ice crystal surface structure influences crystal growth rates and radiative properties that can have either a positive or negative contribution to climatic warming. This work provides new observations of small cirrus particles collected during the Ice Cryo Encapsulation by Balloon (ICE-Ball) campaign that took place in Oklahoma for three weeks during the fall of 2021. Scanning Electron Microscope (SEM) images of crystals exhibit the frequent occurrence of complex polycrystalline habits, such as scroll rosettes, and frequent hollowing of small ice crystals, suggesting that faceting instability occurs on crystals with dimensions as small as 20 [mu]m. These results indicate that the effective density of small crystals may be less than prior in-situ estimates. Backward and forward trajectory calculations using the Hybrid Single-Particle Lagrangian Integrated Trajectory model (HYSPLIT) are used together with meteorological characterization based on ERA5 reanalysis to analyze the background airmass characteristics in which the observed cirrus formed. These analyses provide forcing for one-dimensional model simulations of a cirrus case that occurred on October 23rd, 2021; scroll rosettes were the dominant habit sampled. Laboratory measurements of rosette growth are used to inform model microphysics, thereby facilitating a more accurate depiction of the vapor depositional growth of cirrus crystals. These model simulations, in conjunction with the ICE-Ball in-situ samples, vertically pointing radar and lidar measurements, satellite observations, and reanalysis data, are used to estimate the spatiotemporal extent and lifetime of the cirrus cloud field observed on October 23rd, 2021, contributing to the understanding of ice crystal morphological development and the associated environmental feedbacks.
Download or read book Study of Ice Crystal Habit Characterisation in a Cold Cloud Parcel Model written by Daniel Figueras-Nieto and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurements of Small Ice Crystals in Arctic Cirrus Observations from the Indirect and Semi Direct Aerosol Campaign ISDAC written by Kenny Bae and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ice Crystal Classification Using Two Dimensional Light Scattering Patterns written by C. Stopford and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation is presented into methods of characterising cirrus ice crystals from in-situ light scattering data. A database of scattering patterns from modelled crystals was created using the Ray Tracing with Diffraction on Facets (RTDF) model from the University of Hertfordshire, to which experimental and modelled data was fitted. Experimental data was gathered in the form of scattering patterns from ice analogue crystals with similar optical properties and hexagonal symmetry to ice, yet stable at room temperature. A laboratory rig is described which images scattering patterns from single particles while allowing precise control over the orientation of the particle with respect to the incident beam. Images of scattering patterns were captured and compared to patterns from modelled crystals with similar geometry. Methods for introducing particles en-masse and individually to the Small Ice Detector (SID) instruments are discussed, with particular emphasis on the calibration of the gain of the SID-2 instrument. The variation in gain between detector elements is found to be significant, variable over the life of the detector, and different for different detectors. Fitting was performed by comparison of test scattering patterns (either modelled or experimental) to the reference database. Representation of the two dimensional scattering patterns by asymmetry factor, moment invariants, azimuthal intensity patterns (AIP) and the Fourier transform of the AIP are compared for fitting accuracy. Direct comparison of the AIP is found to be the most accurate method. Increased resolution of the AIP is shown to improve the fitting substantially. Case studies are presented for the fitting of two ice analogue crystals to the modelled database. Fitting accuracy is found to be negatively influenced by small amounts of surface roughness and detail not currently considered by the RTDF model. Fitting of in-situ data gathered by the SID-3 instrument during the HALO 02 campaign at the AIDA cloud chamber in Germany is presented and discussed. Saturation of detector pixels is shown to affect pattern fitting. In-flight operation of the instrument involves the variation of gain of the whole detector (as opposed to individual elements) in order to obtain unsaturated images of both large and small particles.
Download or read book Observations of Fall Patterns for Natural Ice Crystals written by J. Zikmunda and published by . This book was released on 1972 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Liquid Crystal Optical Device written by Leszek R. Jaroszewicz and published by MDPI. This book was released on 2020-01-03 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Special Issue “Liquid Crystal Optical Devices” discusses recent developments in the rapidly advancing subject of liquid crystals (LCs). The book is composed of several contributions from researchers in the field of liquid crystals that deal with the broadly with aspects of optical devices ranging from a theoretical viewpoints to practical implications of the properties of LCs. This is the first Special Issue devoted solely to recent advances in the rapidly expanding subject of LCs, a unique class of substances that combines both ordered structures with quasi-liquid-like properties. This Special Issue offers a broad perspective of the present state of the art in design and an up-to-date account of the most recent advances and progress in the field of LCs, providing thorough coverage of the demonstrated optical devices and the comprehensive analysis needed by professionals and engineers in the field of LC. The material is carefully structured, providing readers with a solid foundation of the principles, capabilities, use, and limitations of LC optical devices. In addition, this book covers the principles, recent advances and future developments of liquid crystal beam steering devices as well as recent advances in adaptive liquid crystal lenses.
Download or read book Light Scattering by Ice Crystals written by Kuo-Nan Liou and published by Cambridge University Press. This book was released on 2016-10-06 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume outlines the fundamentals and applications of light scattering, absorption and polarization processes involving ice crystals.
Download or read book Snow Crystals written by Wilson Alwyn Bentley and published by . This book was released on 1931 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Data Clustering Theory Algorithms and Applications Second Edition written by Guojun Gan and published by SIAM. This book was released on 2020-11-10 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: Data clustering, also known as cluster analysis, is an unsupervised process that divides a set of objects into homogeneous groups. Since the publication of the first edition of this monograph in 2007, development in the area has exploded, especially in clustering algorithms for big data and open-source software for cluster analysis. This second edition reflects these new developments, covers the basics of data clustering, includes a list of popular clustering algorithms, and provides program code that helps users implement clustering algorithms. Data Clustering: Theory, Algorithms and Applications, Second Edition will be of interest to researchers, practitioners, and data scientists as well as undergraduate and graduate students.
Download or read book Clouds and Climate written by A. Pier Siebesma and published by Cambridge University Press. This book was released on 2020-08-20 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive overview of research on clouds and their role in our present and future climate, for advanced students and researchers.
Download or read book Becoming Creole written by Melissa A. Johnson and published by Rutgers University Press. This book was released on 2019 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: Taking the reader into the lived experience of Afro-Caribbean people who call the watery lowlands of Belize home, Melissa A. Johnson traces Belizean Creole peoples' relationships with the plants, animals, water, and soils around them, and analyzes how these relationships intersect with transnational racial assemblages.
Download or read book Bar Briefs written by and published by . This book was released on 1948 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Canons of Professional Ethics written by American Bar Association and published by . This book was released on 1951 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transition Planning in the Schools written by Susan J. Severson and published by . This book was released on 1997-08-01 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fast Fluidization written by and published by Academic Press. This book was released on 1994-12-23 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last decade, circulating fluidization or fast fluidization has developed rapidly, superseding standard bubbling fluidization in many applications; for example, fast fluidization provides a better means forcontrolling emissions from the combustion of high-sulfur fuels and excels when used in boilers in steam plant and power stations. China initiated the study of fast fluidization in the early 1970s. Focusing on the substantial research cultivated in that country, with Kwauk at the leading edge, this latest volume in the Advances in Chemical Engineering Series is written in the context of the international state of the art and addresses some of the most vital issues surrounding this fluidization method."
Download or read book Garrison Diversion Unit written by United States. Department of the Interior and published by . This book was released on 1960 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
