Transport at the Air-Sea Interface Measurements, Models and Parametr

Predictions of our future climate vary greatly, with detailed forecasts still subject to debate. One key uncertainty is caused by the lack of our present knowledge of transport processes in the air-water interface, which poses the main transfer resistance

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ristoph S. Garbe, Robert A. Handler, Bernd Jähne (Eds.)

Transport at the Air-Sea Interface Measurements, Models and Parametrizations

With 127 Figures and a CD-ROM

EDITORS:

PRIV.-DOZ. DR. C.S. GARBE PROF. DR. B. JÄHNE INTERDISCIPLINARY CENTER FOR SCIENTIFIC COMPUTING UNIVERSITY OF HEIDELBERG IM NEUENHEIMER FELD 368 69120 HEIDELBERG GERMANY

DR. R.A. HANDLER Naval Research Laboratory 4555 Overlook Avenue SW Washington DC 20375 USA E-mail: [email protected]

AND

INSTITUTE OF ENVIRONMENTAL PHYSICS UNIVERSITY OF HEIDELBERG IM NEUENHEIMER FELD 229 69120 HEIDELBERG GERMANY

E-mail: Christoph.Garbe@ iwr.uni-heidelberg.de [email protected]

ISSN 1863-5520 ISBN 10 3-540-36904-x Springer Berlin Heidelberg New York ISBN 13 978-3-540-36904-2 Springer Berlin Heidelberg New York Library of Congress Control Number: 2007931824 This work is subject to copyright. All rights are reserved, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilm or in any other way, and storage in data banks. Duplication of this publication or parts thereof is permitted only under the provisions of the German Copyright Law of September 9, 1965, in its current version, and permission for use must always be obtained from Springer-Verlag. Violations are liable to prosecution under the German Copyright Law. Springer is a part of Springer Science+Business Media springeronline.com © Springer-Verlag Berlin Heidelberg 2007 The use of general descriptive names, registered names, trademarks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. Cover design: deblik, Berlin Production: A. Oelschläger Typesetting: Camera-ready by the Editors Printed on acid-free paper 30/2132/AO 543210

Preface

The sea surface represents the interface between the ocean and the atmosphere. As the interface is approached from either the atmospheric or ocean side, the transport mechanisms are shifted from turbulent to diffusive diffusion. Hence the viscous boundary layers at both sides of the water surface represents the major resistance to the transport of energy, mass and impulse between atmosphere and ocean. This has implications for the composition of the atmosphere and has gained importance especially for radiatively (climate)-active gases such as CO2 , CH4 , N2 O and DMS. But also, the transport of gases across the interface is significant for the fate and the atmospheric/marine budgets of many man-made pollutants, in particular of volatile organic compounds and mercury. The two key variables which are required for the determination of the gas exchange fluxes are the partial pressure difference of the considered gas at the sea surface, and the gas exchange transfer velocity k. Partial pressure differences are either obtained from measurements in the surface water and in the atmospher

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