Download or read book Validation Test Report for the Global Ocean Forecast System V3 0 1 12 Deg HYCOM NCODA Phase II written by and published by . This book was released on 2010 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: Global Ocean Forecast System Version 3.0 (V3.0) is comprised of the 1/12 deg global HYbrid Coordinate Ocean Model (HYCOM) and the Navy Coupled Ocean Data Assimilation (NCODA) system. It is a next-generation system capable of nowcasting and forecasting the oceanic "weather," which includes the three-dimensional ocean temperature, salinity and current structure, the surface mixed layer and the location of mesoscale features such as eddies, meandering currents and fronts. V3.0 is scheduled to replace the existing nowcast/forecast system (V2.6) based on the 1/8 deg Navy Coastal Ocean Model (NCOM), 1/32 deg Navy Layered Ocean Model (NLOM), 1/8 deg Modular Ocean Data Analysis System (MODAS) and NCODA. This Phase II report describes the validation testing performed on one-year hindcasts of V3.0 and V2.6. A few Phase I tasks (temperature vs. depth and acoustical proxy error analyses) have been re-evaluated along with new evaluations examining a) each system as a provider of boundary conditions to a regional nested model, b) 14-day forecast skill relative to climatology and persistence of temperature vs. depth, c) 14-day forecast skill of acoustical proxies, d) 14-day forecast skill of sea surface height and sea surface temperature, and e) a velocity comparison against glider and drifting buoy observations. Overall, this report has determined that GOFS V3.0 is performing equal to or notably better than GOFS V2.6. The superior performance of V3.0 is especially evident in providing boundary contitions to regional nested models, an important function of a global ocean nowcast/forecast system.
Download or read book O ti ss hsiang y ch an li ch ng chih lun chi written by and published by . This book was released on 1959 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book User s Manual for the Global Ocean Forecast System GOFS Version 3 0 written by and published by . This book was released on 2009 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: This User's Manual describes the sequence of scripts for the Global Ocean Forecast System (GOFS) Version 3.0 that consists of the 1/12 degree global HYbrid Coordinate Ocean Model (HYCOM) and uses the Navy Coupled Ocean Data Assimilation scheme that is run daily in the normal processing stream at the Naval Oceanographic Office (NAVOCEANO). It is geared toward NAVOCEANO operators rather than a scientific researcher using HYCOM. The appendices contain the individual scripts used in the daily runstream and a troubleshooting guide is included to provide workarounds to some common problems encountered when running the model.
Download or read book Validation Test Report for the 1 16 Degree Global NRL Layered Ocean Model Nowcast Forecast System written by and published by . This book was released on 2003 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes validation tests for the eddy-resolving 1/16 degree global Naval Research Laboratory (NRL) Layered Ocean Model (NLOM) nowcast/forecast system. For the nonassimilative model, maps of sea surface height (SSH) and sea surface temperature (SST) show that the model depicts the observed positions of the major fronts. Comparisons of model SSH variability with altimetry and correlations with tide-gauge SSH time series demonstrate ocean model skill. In addition, model comparisons with daily buoy time series of SST indicate that the model has SST simulation skill when forced by winds and thermal forcing. The realistic nonassimilative model simulation skill indicates that the model will add skill to the data assimilation cycle and, in the case of SSH assimilation, allow the model to be used as the first-guess for the analysis. Validation tests of the assimilative model were performed. SST comparisons with unassimilated buoy time series show that the model has good agreement with the observed data. SSH comparisons with observed sea level from coastal stations and buoys indicate that the model has accurate SSH and the correlations are higher with data assimilation. Nowcast comparisons with analyzed frontal positions from the Naval Oceanographic Office show that the model can be a useful tool to help the analyst improve frontal analyses. Forecast evaluations indicate that the model has SSH predictive skill of at least 30 days in the Kuroshio Extension, about 15 days in the Gulf Stream, and at least 30 days when calculated globally. The NLOM system was also tested for improvement of the Modular Ocean Data Assimilation System (MODAS) synthetic temperature profiles by using the NLOM SSH field as opposed to the MODAS 2-D SSH analysis field. Results indicate that the synthetics from NLOM SSH are, in general, better than MODAS SSH. (2 tables, 50 figures, 34 refs.).
Download or read book Validation Test Report for the 1 16 Degree Global NRL Layered Ocean Model Nowcast Forecast System written by Robert C. Rhodes and published by . This book was released on 2003-04-01 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes validation tests for the eddy-resolving 1/16 degree global Naval Research Laboratory (NRL) Layered Ocean Model (NLOM) nowcast/forecast system. For the nonassimilative model, maps of sea surface height (SSH) and sea surface temperature (SST) show that the model depicts the observed positions of the major fronts. Comparisons of model SSH variability with altimetry and correlations with tide-gauge SSH time series demonstrate ocean model skill. In addition, model comparisons with daily buoy time series of SST indicate that the model has SST simulation skill when forced by winds and thermal forcing. The realistic nonassimilative model simulation skill indicates that the model will add skill to the data assimilation cycle and, in the case of SSH assimilation, allow the model to be used as the first-guess for the analysis. Validation tests of the assimilative model were performed. SST comparisons with unassimilated buoy time series show that the model has good agreement with the observed data. SSH comparisons with observed sea level from coastal stations and buoys indicate that the model has accurate SSH and the correlations are higher with data assimilation. Nowcast comparisons with analyzed frontal positions from the Naval Oceanographic Office show that the model can be a useful tool to help the analyst improve frontal analyses. Forecast evaluations indicate that the model has SSH predictive skill of at least 30 days in the Kuroshio Extension, about 15 days in the Gulf Stream, and at least 30 days when calculated globally. The NLOM system was also tested for improvement of the Modular Ocean Data Assimilation System (MODAS) synthetic temperature profiles by using the NLOM SSH field as opposed to the MODAS 2-D SSH analysis field. Results indicate that the synthetics from NLOM SSH are, in general, better than MODAS SSH. (2 tables, 50 figures, 34 refs.)
Download or read book Validation Test Report for the 1 8 Deg Global Navy Coastal Ocean Model Nowcast Forecast System written by and published by . This book was released on 2007 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: The global Naval Coastal Ocean Model (NCOM) is a 1/8 degree global application of NCOM developed by the Naval Research Laboratory (NRL) for use at the Naval Oceanographic Office (NAVOCEANO) as part of an assimilative ocean model nowcast/forecast system. Global NCOM is the first operational global ocean model that has sufficient resolution to be eddy-permitting. Global NCOM supports predictions of ocean currents, temperatures, salinity, sea surface height, and sound speed both directly and by providing initial and boundary conditions for higher-resolution nested ocean models. The forecast system addresses Navy requirements for Numerical Modeling (METOC 9801), High Resolution Surface and Subsurface Currents (METOC 9308), Littoral Salinity Prediction (METOC 9902), and Air-Sea Drift Prediction (METOC 9115). This validation test report describes global NCOM, its use in an assimilative forecast system, and evaluation of assimilative and non-assimilative products using independent climatologies and observations.
Download or read book PCTides Validation Test Report written by and published by . This book was released on 2006 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Naval Research Laboratory (NRL) has built a globally relocatable tide-surge forecast system. Currently, this system runs on a UNIX platform, but was originally designed for PC-based use, and, as such, is referred to as "PCTides." The system is composed of a two-dimensional barotropic ocean model, which is driven by tidal forcing and/or surface wind and pressure forcing. PCTides is applied to the user's area of interest to provide a hindcast or forecast of tidal amplitude, phase and two-dimensional barotropic ocean currents. The PCTides system uses the solutions from a global tide model Finite Element Solutions 99 (FES99) to provide global boundary conditions. The system also contains a 2-min global bathymetry database (the NRL DBDB2 database) to define the model's geometry and bathymetry. Wind forcing for PCTides comes from a number of sources. If the user has access, the Navy's Global Atmospheric Prediction System (NOGAPS), or the Coupled Ocean & Atmospheric Mesocale Prediction system (COAMPS) may be used. Based on this model, hurricane forcing can be generated that can provide surface pressure and winds to drive the two-dimensional barotropic ocean model and generate a storm surge. One major advantage of PCTides is that the model has the ability to be rapidly relocated to areas of interest. The tidal heights can be generated at a user-specified latitude/longitude position and, therefore, is not dependent on a tidal "look up" table or preexisting database of preselected locations.
Download or read book Validation Test Report for the First Generation Dart Gulf Stream Forecasting System written by Theodore J. Bennett and published by . This book was released on 1992 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Verification and Validation Report for the End to End Test Phase 1 written by and published by . This book was released on 2000 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report provides the results of the verification and validation (V&V) tasks performed during Phase 1 of the Joint Advanced Distributed Simulation (JADS) End-To-End (ETE) Test. This report details the results of executing the V&V requirements listed within the ETE Test Activity Plan, Appendix C, Verification and Validation Plan for the ETE Test. Verification and Validation Tasks The V&V tasks that were performed during or prior to Phase 1 are described in the ETE Test Activity Plan, Appendix C, Verification and Validation Plan for the End-To-End (ETE) Test.
Download or read book Operational Oceanography in the 21st Century written by Andreas Schiller and published by Springer Science & Business Media. This book was released on 2011-04-11 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past decade the significant advances in real-time ocean observing systems, ocean modelling, ocean data assimilation and super-computing has seen the development and implementation of operational ocean forecast systems of the global ocean. At the conclusion of the Global Ocean Data Assimilation Experiment (GODAE) in 2008 ocean analysis and forecasting services were being supported by 12 international centres. This book is about ocean forecasting - a maturing field which remains an active area of research, and includes such topics as ocean predictability, observing system design, high resolution ocean modelling and ocean data assimilation. It presents the introduction to ocean forecasting which provides a foundation for new opportunities in areas of coupled bio-geochemical forecasting and coupled atmosphere-wave-ocean forecasting. The book describes an updated account of research and development to improve forecast systems, determining how best to service the marine user community with forecast information as well as demonstrating impact to their applications. It also discusses operational centres that are now supporting a range of real-time ocean services including online graphical and data products for their user communities and their feedback on the quality of information. The contents of this book are aimed at early career scientists and professionals with an interest in operational oceanography and related ocean science. There are excellent opportunities for exciting careers in the emerging field of operational oceanography in order to address current and future challenges as well as provide the supporting services to a rapidly growing user community.
Download or read book Understanding and Predicting the Gulf of Mexico Loop Current written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2018-05-23 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the most significant, energetic, yet not well understood, oceanographic features in the Americas is the Gulf of Mexico Loop Current System (LCS), consisting of the Loop Current (LC) and the Loop Current Eddies (LCEs) it sheds. Understanding the dynamics of the LCS is fundamental to understanding the Gulf of Mexico's full oceanographic system, and vice versa. Hurricane intensity, offshore safety, harmful algal blooms, oil spill response, the entire Gulf food chain, shallow water nutrient supply, the fishing industry, tourism, and the Gulf Coast economy are all affected by the position, strength, and structure of the LC and associated eddies. This report recommends a strategy for addressing the key gaps in general understanding of LCS processes, in order to instigate a significant improvement in predicting LC/LCE position, evolving structure, extent, and speed, which will increase overall understanding of Gulf of Mexico circulation and to promote safe oil and gas operations and disaster response in the Gulf of Mexico. This strategy includes advice on how to design a long-term observational campaign and complementary data assimilation and numerical modeling efforts.
Download or read book Data Assimilation for Atmospheric Oceanic and Hydrologic Applications Vol II written by Seon Ki Park and published by Springer Science & Business Media. This book was released on 2013-05-22 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the most recent progress in data assimilation in meteorology, oceanography and hydrology including land surface. It spans both theoretical and applicative aspects with various methodologies such as variational, Kalman filter, ensemble, Monte Carlo and artificial intelligence methods. Besides data assimilation, other important topics are also covered including targeting observation, sensitivity analysis, and parameter estimation. The book will be useful to individual researchers as well as graduate students for a reference in the field of data assimilation.
Download or read book NOAA Climate Program written by United States. National Oceanic and Atmospheric Administration and published by . This book was released on 1977 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ocean Modelling for Beginners written by Jochen Kämpf and published by Springer Science & Business Media. This book was released on 2009-10-08 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces computer-based modeling of oceanic processes. It contains over twenty practical exercises, using freely available open-Source software, and covers a wide range of topics, from long surface waves to general wind-driven circulation.
Download or read book Ocean Wave Energy written by Joao Cruz and published by Springer Science & Business Media. This book was released on 2007-12-22 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors of this timely reference provide an updated and global view on ocean wave energy conversion – and they do so for wave energy developers as well as for students and professors. The book is orientated to the practical solutions that this new industry has found so far and the problems that any device needs to face. It describes the actual principles applied to machines that convert wave power to electricity and examines state-of-the-art modern systems.
Download or read book Variations in Earth Rotation written by Dennis D. McCarthy and published by American Geophysical Union. This book was released on 1990 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 59. As part of the Nineteenth General Assembly of The International Union of Geodesy and Geophysics Symposium (IUGG) in Vancouver, Canada, Union Symposium U4, "Variations in Earth Rotation" was held August 18-19 1987. The Convenor was Dennis D. McCarthy, U.S. Naval Observatory with P. Paquet, Observatoire Royal de Belgique and M. G. Rochester, St. Johns University serving as co-convernors. In a session on internal structure of the Earth papers dealt with the geophysical effects on Earth rotation parameters. Mantle anelasticity increases the free core nutation (FCN) period by a few days. The period of the FCN and the amplitudes of the main nutation components are sensitive to the ellipticity of the core?]mantle boundary (CMB), and a non-hydrostatic increase of 400m in the flattening of the CMB is a possible explanation of the discrepancies from theory. An alternative suggestion rests on the subseismic description of the nutation spectrum of the stratified liquid core. Evidently new models will have to take into account contributions from the oceans, mantle anelasticity, non-hydrostatic pre-stress, CMB topography and internal core structure.
Download or read book Volcanoes in the Sea written by Gordon A. Macdonald and published by University of Hawaii Press. This book was released on 2021-05-25 with total page 545 pages. Available in PDF, EPUB and Kindle. Book excerpt: Well written and superbly illustrated, this work includes chapters on tectonic plates, volcanoes, erosion by water and wind, the ocean, ice and glaciers, earthquakes and tsunamis.
