TITLE

Forecast Model Bias Correction in Ocean Data Assimilation

AUTHOR(S)
Chepurin, Gennady A.; Carton, James A.; Dee, Dick
PUB. DATE
May 2005
SOURCE
Monthly Weather Review;May2005, Vol. 133 Issue 5, p1328
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Numerical models of ocean circulation are subject to systematic errors resulting from errors in model physics, numerics, inaccurately specified initial conditions, and errors in surface forcing. In addition to a time-mean component, the systematic errors include components that are time varying, which could result, for example, from inaccuracies in the time-varying forcing. Despite their importance, most assimilation algorithms incorrectly assume that the forecast model is unbiased. In this paper the authors characterize the bias for a current assimilation scheme in the tropical Pacific. The characterization is used to show how relatively simple empirical bias forecast models may be used in a two-stage bias correction procedure to improve the quality of the analysis.
ACCESSION #
17239742

 

Related Articles

  • Coupling of eastern and western subpolar North Atlantic: salt transport in the Irminger Current. Born, A.; Stocker, T. F.; Sandø, A. B. // Ocean Science Discussions;2013, Vol. 10 Issue 2, p555 

    Salt transport in the Irminger Current and thus the coupling between eastern and western subpolar North Atlantic plays an important role for climate variability across a wide range of time scales. High-resolution ocean modeling and observations indicate that salinities in the eastern subpolar...

  • COASTAL CURRENTS. Gelfenbaum, Guy // Encyclopedia of Coastal Science;2005, p259 

    The article presents information on coastal currents. Types of coastal currents include wave-driven, tidal and wind-driven. Coastal currents are effected by their proximity to a boundary regardless of their origin. Field measurements and mathematical models are used when studying ocean currents....

  • Response of Thermohaline Circulation to Freshwater Forcing under Present-Day and LGM Conditions. Hu, Aixue; Otto-Bliesner, Bette L.; Meehl, Gerald A.; Weiqing Han; Morrill, Carrie; Brady, Esther C.; Briegleb, Bruce // Journal of Climate;May2008, Vol. 21 Issue 10, p2239 

    Responses of the thermohaline circulation (THC) to freshwater forcing (hosing) in the subpolar North Atlantic Ocean under present-day and the last glacial maximum (LGM) conditions are investigated using the National Center for Atmospheric Research Community Climate System Model versions 2 and 3....

  • Statistical Parameterization of Heterogeneous Oceanic Convection. Pasquero, Claudia; Tziperman, Eli // Journal of Physical Oceanography;Feb2007, Vol. 37 Issue 2, p214 

    A statistical convective adjustment scheme is proposed that attempts to account for the effects of mesoscale and submesoscale variability of temperature and salinity typically observed in the oceanic convective regions. Temperature and salinity in each model grid box are defined in terms of...

  • Oceanic fronts and jets around Japan: a review. Kida, Shinichiro; Mitsudera, Humio; Aoki, Shigeru; Guo, Xinyu; Ito, Shin-ichi; Kobashi, Fumiaki; Komori, Nobumasa; Kubokawa, Atsushi; Miyama, Toru; Morie, Ryosuke; Nakamura, Hisashi; Nakamura, Tomohiro; Nakano, Hideyuki; Nishigaki, Hajime; Nonaka, Masami; Sasaki, Hideharu; Sasaki, Yoshi; Suga, Toshio; Sugimoto, Shusaku; Taguchi, Bunmei // Journal of Oceanography;Oct2015, Vol. 71 Issue 5, p469 

    This article reviews progress in our understanding of oceanic fronts around Japan and their roles in air-sea interaction. Fronts associated with the Kuroshio and its extension, fronts within the area of the Kuroshio-Oyashio confluence, and the subtropical fronts are described with particular...

  • Short-circuiting of the overturning circulation in the Antarctic Circumpolar Current. Garabato, Alberto C. Naveira; Stevens, David P.; Watson, Andrew J.; Roether, Wolfgang // Nature;5/10/2007, Vol. 447 Issue 7141, p194 

    The oceanic overturning circulation has a central role in the Earth’s climate system and in biogeochemical cycling, as it transports heat, carbon and nutrients around the globe and regulates their storage in the deep ocean. Mixing processes in the Antarctic Circumpolar Current are key to...

  • Eddy-Driven Exchange between the Open Ocean and a Sub-Ice Shelf Cavity. Årthun, Marius; Holland, Paul R.; Nicholls, Keith W.; Feltham, Daniel L. // Journal of Physical Oceanography;Nov2013, Vol. 43 Issue 11, p2372 

    The exchange between the open ocean and sub-ice shelf cavities is important to both water mass transformations and ice shelf melting. Here, the authors use a high-resolution (500 m) numerical model to investigate to which degree eddies produced by frontal instability at the edge of a polynya are...

  • Central Mediterranean Sea forecast: effects of high-resolution atmospheric forcings. Natale, S.; Sorgente, R.; Gaberšek, S.; Ribotti, A.; Olita, A. // Ocean Science Discussions;2006, Vol. 3 Issue 3, p637 

    Ocean forecasts over the Central Mediterranean, produced by a near real time regional scale system, have been evaluated in order to assess their predictability. The ocean circulation model has been forced at the surface by a medium, high or very high resolution atmospheric forcing. The simulated...

  • Influence of a step-like coastline on the basin scale vorticity budget of mid-latitude gyre models. DUPONT, FRÉDÉRIC; STRAUB, DAVID N.; LIN, CHARLES A. // Tellus: Series A;May2003, Vol. 55 Issue 3, p255 

    ABSTRACT Global vorticity budgets in C-grid shallow water (SW) and quasi-geostrophic (QG) models of wind-driven ocean circulation with free-slip boundary conditions are considered. For both models, it is pointed out that the discretized vorticity equation is defined only over a subdomain that...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics