This book presents results of the combined use of microwave remote sensing, optical tools, and ecoinformatics methods under solution-applied tasks at both regional and global scales. Ecoinformatics methods are used to assess links between global climate change and the level of ocean pollution, with specific focus on the Arctic Ocean, the Sea of Okhotsk, and the South-China Sea. The theoretical and applied aspects of instrumental tools are considered in this book as a basis for the monitoring of water quality in various watersheds, with particular attention to microwave remote sensing monitoring data to determine the ecotoxicological status of hydro-ecosystems affected by climate change. The book develops new information technologies that provide solutions for hydrochemical tasks using algorithms and models based on computer technologies for big data processing. This will help to synthesize effective computer-based systems for the solution of problems arising due to anthropogenic impacts on hydrological processes and objects at various spatial scales. This book is intended for specialists in the fields of environmental monitoring, climate change, human-nature interactions, and geopolitics. The book will be useful for undergraduate and postgraduate students studying these fields of science as well.

Costas A. Varotsos is Professor of Atmospheric Physics and former Dean of the School of Science of the National and Kapodistrian University of Athens, Greece. His main research interests include remote sensing, climate dynamics, atmospheric physics & chemistry, environmental change, and non-linear processes. He has published more than 300 research papers in peer reviewed journals, 18 monographs and has contributed chapters to a further six books. He has coordinated or participated in more than 50 large international research competitive projects, funded by National, European and International Organizations (e.g., European Commission, ESA). He has been Editor-in-Chief, Editor and Associate Editor of several international journals with peer-review system. Since January 2020, he is Editor-in-Chief of the Remote Sensing Letters (T&F). He has received the gold A.S. Popov medal from the Russian A.S. Popov Society, the RADI Award from the Chinese Academy of Sciences, and the MOST/ESA Award. He has been awarded with the title of Academician and Honorary Professor from several Academies, Universities, and Institutes.

Ferdenant A. Mkrtchyan was graduated from the Yerevan Polytechnic Institute as engineer - mathematician in 1969. 1969-1972 - postgraduate study of Institute of Oceanology RAS (Moscow). He received his PhD in signal processing in 1973. He became Full Professor of Radiophysics in 1996. He was appointed Grand Professor in 2012 at the Nguyen Tat Thanh University (Vietnam). e is a corresponding member of the Russian Academy of Natural Sciences and Foreign Member of the National Academy of Sciences of Armenia. He is the Chairman of the section "Cybernetics and Ecology Issues" of the Central Council of the Russian Sciences Engineering A.S. Popov Society of Radio, Electronics and Communications.