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Explores the frozen tundra of the Arctic and Antarctic as the complexities of water are revealed.
This unique book presents ways to mitigate the disastrous effects of snow/ice accumulation and discusses the mechanisms of new coatings deicing technologies. The strategies currently used to combat ice accumulation problems involve chemical, mechanical or electrical approaches. These are expensive and labor intensive, and the use of chemicals raises serious environmental concerns. The availability of truly icephobic surfaces or coatings will be a big boon in preventing the devastating effects of ice accumulation. Currently, there is tremendous interest in harnessing nanotechnology in rendering surfaces icephobic or in devising icephobic surface materials and coatings, and all signals indicate that such interest will continue unabated in the future. As the key issue regarding icephobic materials or coatings is their durability, much effort is being spent in developing surface materials or coatings which can be effective over a long period. With the tremendous activity in this arena, there is strong hope that in the not too distant future, durable surface materials or coatings will come to fruition. This book contains 20 chapters by subject matter experts and is divided into three parts— Part 1: Fundamentals of Ice Formation and Characterization; Part 2: Ice Adhesion and Its Measurement; and Part 3: Methods to Mitigate Ice Adhesion. The topics covered include: factors influencing the formation, adhesion and friction of ice; ice nucleation on solid surfaces; physics of ice nucleation and growth on a surface; condensation frosting; defrosting properties of structured surfaces; relationship between surface free energy and ice adhesion to surfaces; metrology of ice adhesion; test methods for quantifying ice adhesion strength to surfaces; interlaboratory studies of ice adhesion strength; mechanisms of surface icing and deicing technologies; icephobicities of superhydrophobic surfaces; anti-icing using microstructured surfaces; icephobic surfaces: features and challenges; bio-inspired anti-icing surface materials; durability of anti-icing coatings; durability of icephobic coatings; bio-inspired icephobic coatings; protection from ice accretion on aircraft; and numerical modeling and its application to inflight icing.
The hazard resulting from the formation of ice on airplanes makes it highly desirable to ascertain all possible meteorological information pertinent thereto in order to avoid or prevent its formation. The object of this paper is to present the results of a number of records recently secured from autographic meteorological infstruments mounted on airplanes at times when ice formed.
Freeze-up at Alert, Eureka, Isachsen, Mould Bay, and Resolute in the Canadian Arctic was observed to occur any time between the last week in August and the last week in September. A mathematical relationship between air temperature and sea-ice formation provided a favorable method for predicting the date of freeze-up at these stations. The maximum seasonal growth of sea ice, 269 cm, was measured at Isachsen; the minimum, 149 cm, was measured at Resolute. These values are based on measurements made at the five stations in the Canadian Arctic Archipelago having a total of 35 station years of record. Equations to predict the growth of sea ice by increments were derived empirically from the observations made at these locations. A separate term is introduced in the equations to take account of the effects of snow-cover depths on ice growth. To apply the formulas only air-temperature and snow-depth data are required. The study disclosed good correlation between air temperature and decrease in sea-ice thickness at the Arctic stations. The relationship was found to be: h = 0.55 sigma theta where h = decrease in ice thickness (cm) and sigma theta = accumulated degree days (above -1.8C). (Author).
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This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.