Marine Environmental Characterization Synthesis Lectures on Ocean Systems Engineering Series

The use of environmental data to support science, technology, and marine operations has evolved dramatically owing to long-term ocean observatories, unmanned platforms, satellite and coastal remote sensing, data assimilative numerical models, and high-speed communications. Actionable environmental information is regularly produced and communicated from quality-controlled measurements and skillful forecasts. The characterization of complex oceanographic processes is more difficult compared to inland features because of the difficulty in obtaining observations from often remote and hazardous locations. Regardless, coastal and ocean engineering projects and operations require the collection and analysis of meteorological and oceanographic data to fill information gaps and the running of numerical models to characterize regions of interest. Data analytics are also essential to integrate disparate marine data from national archives, in situ sensors, imagery, and numerical models to meet project requirements. Holistic marine environmental characterization is essential for data-driven decision making across the science and engineering lifecycle (e.g., research, production, operations, end-of-life).

Many marine science and technology projects require the employment of an array of instruments and models to characterize spatially and temporally variable processes that may impact operations. Since certain environmental conditions will contribute to structural damage or operational disturbances, they are described using statistical parameters that have been standardized for engineering purposes. The statistical description should describe extreme conditions as well as long- and short-term variability. These data may also be used to verify and validate models and simulations. Environmental characterization covers the region where engineering projects or maritime operations take place. For vessels that operate across a variety of seaways, marine databases and models are essential to describe environmental conditions. Data, which are used for design and operations, must cover a sufficiently long time period to describe seasonal to sub-seasonal variations, multi-year, decadal, multi-decadal, and even climatological factors such as sea level rise, coastal winds, waves, and global ocean temperatures. Combined data types are essential for the computation of environmental loads for the region of interest. Typical factors include winds, waves, currents, and tides. Some regions may require consideration of biofouling, earthquakes, ice, salinity, soil conditions, temperature, tsunami, and visibility. Observations are also used for numerical forecasts, but errors may exist due to inexact physical assumptions and/or inaccurate initial data, which can cause errors to grow to unacceptable levels with increased forecasting times. Overall, marine environmental characterization tools, from observational data to numerical modeling, are critical to today's science, engineering, and marine operational disciplines.

Preface.- Acknowledgments.- Introduction.- Oceanographic Regions.- Example Critical Phenomena.- Systems and Sensors.- Data Quality.- Data Analysis.- Key Challenges.- Conclusions.- Glossary of Environmental Terminology.- Bibliography.- Authors' Biographies.

C. Reid Nichols is the president of Marine Information Resources Corporation. He is a retired U.S. Marine Corps colonel with experience in military logistics and intelligence. His applied research interests include physical oceanography and providing environmental characterization to support researchers such as naval architects involved in testing innovative vessels, engineers involved in the development of oceanographic platforms, and operators interested in decision aid products that help protect property and save lives. He received his M.S. from North Carolina State University and an MBA from Loyola University Maryland and was a contributing author for Recent Advances and Issues in Oceanography, Encyclopedia of Marine Science, and Tomorrow’s Coasts: Complex and Impermanent.Kaustubha Raghukumar is a physical oceanographer with Integral Consulting, Inc. His re-search has focused on modeling ocean ecosystems such as the California Current System using data-constrained physical circulation estimates and validation testing of innovative instruments such as the Spotter, an easily deployed solar powered wave buoy. He received his M.S. from the New Jersey Institute of Technology and a Ph.D. from University of California San Diego.