Accession Number : ADA550135


Title :   Implementation of the Automated Numerical Model Performance Metrics System


Descriptive Note : Memorandum rept.


Corporate Author : NAVAL RESEARCH LAB STENNIS DETACHMENT STENNIS SPACE CENTER MS OCEANOGRAPHY DIV


Personal Author(s) : Dykes, James D


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a550135.pdf


Report Date : 26 Sep 2011


Pagination or Media Count : 31


Abstract : Known as AutoMetrics, this set of software modules was developed to provide model-observation and model-model comparison matchups and statistics to help modellers and forecasters assess the performance of ocean circulation models, primarily the Navy Coastal Ocean Model (NCOM) and the Hybrid Coordinate Ocean Model (HYCOM). This system is fully automatic and gives users much flexibility in what model runs to be evaluated by this system, in real-time operations or for long-term historical model runs. The AutoMetrics system was the result of a project under the Rapid Transition Program to transition to NAVOCEANO software that provided information to the oceanographers so that they can assess the performance of numerical ocean prediction models run at NAVOCEANO. The Navy Coastal Ocean Model (NCOM) (Rowley et al., 2002; Martin, 2000) was initially the primary target, but also the Hybrid Coordinate Ocean Model (HYCOM) (Wallcraft, 2007) can be used in this system as well. In fact, any ocean circulation model output in the format described below can be used in AutoMetrics. Primarily ocean profiles of observed temperature and salinity are collected and matched with profiles of modeled same parameters corresponding to same location and time. This also applies to surface-only observations. The relationship between observations and model output consists of one-to-many, because from a given model domain and its several runs there exist multiple forecasts for a given time and place. To further complicate matters, the availability time of both observations and model output are considered arbitrary and the system must continually check for both to provide the most up-to-date matches in a timely manner. Ultimately a data base is built with a set of matches that can be analysed statistically in a variety of ways.


Descriptors :   *COMPUTER PROGRAMS , *METRICS , *OBSERVATION , *OCEAN CURRENTS , *OCEAN MODELS , *PREDICTIONS , *TEST AND EVALUATION , ACOUSTIC VELOCITY , AUTOMATION , COMPUTERIZED SIMULATION , FORECASTING , MATCHING , OCEANOGRAPHIC DATA , REAL TIME , SALINITY , SATELLITE IMAGERY , STATISTICAL DATA , TEMPERATURE


Subject Categories : Physical and Dynamic Oceanography
      Computer Programming and Software


Distribution Statement : APPROVED FOR PUBLIC RELEASE