Observing system evaluation based on ocean data assimilation and prediction systems: On-going challenges and a future vision for designing and supporting ocean …

Y Fujii, E Rémy, H Zuo, P Oke, G Halliwell… - Frontiers in Marine …, 2019‏ - frontiersin.org
This paper summarizes recent efforts on Observing System Evaluation (OS-Eval) by the
Ocean Data Assimilation and Prediction (ODAP) communities such as GODAE OceanView …

TOPAZ4: an ocean-sea ice data assimilation system for the North Atlantic and Arctic

P Sakov, F Counillon, L Bertino, KA Lisæter… - Ocean …, 2012‏ - os.copernicus.org
We present a detailed description of TOPAZ4, the latest version of TOPAZ–a coupled ocean-
sea ice data assimilation system for the North Atlantic Ocean and Arctic. It is the only …

GEOS‐S2S version 2: The GMAO high‐resolution coupled model and assimilation system for seasonal prediction

A Molod, E Hackert, Y Vikhliaev, B Zhao… - Journal of …, 2020‏ - Wiley Online Library
Abstract The Global Modeling and Assimilation Office (GMAO) has recently released a new
version of the Goddard Earth Observing System (GEOS) Subseasonal to Seasonal …

Towards a dynamically balanced eddy-resolving ocean reanalysis: BRAN3

PR Oke, P Sakov, ML Cahill, JR Dunn, R Fiedler… - Ocean Modelling, 2013‏ - Elsevier
The generation and evolution of eddies in the ocean are largely due to instabilities that are
unpredictable, even on short time-scales. As a result, eddy-resolving ocean reanalyses …

Super-resolution data assimilation

S Barthélémy, J Brajard, L Bertino, F Counillon - Ocean Dynamics, 2022‏ - Springer
Increasing model resolution can improve the performance of a data assimilation system
because it reduces model error, the system can more optimally use high-resolution …

[HTML][HTML] Global gridded Argo dataset based on gradient-dependent optimal interpolation

C Zhang, D Wang, Z Liu, S Lu, C Sun, Y Wei… - Journal of Marine …, 2022‏ - mdpi.com
The international Argo Program was launched at the turn of the millennium. It has since
collected over 2 million vertical profiles of temperature and salinity from the upper 2000 m of …

[HTML][HTML] Evaluation of Chlorophyll-a estimation using Sentinel 3 based on various algorithms in southern coastal Vietnam

NA Binh, PV Hoa, GTP Thao, HD Duan… - International Journal of …, 2022‏ - Elsevier
This paper aims to assess the potential of Ocean Land Colour Instrument (OLCI) for the
retrieval of chlorophyll-a (chl-a) over southern coastal waters of Vietnam. For that purpose …

Machine learning techniques to construct patched analog ensembles for data assimilation

LM Yang, I Grooms - Journal of Computational Physics, 2021‏ - Elsevier
Using generative models from the machine learning literature to create artificial ensemble
members for use within data assimilation schemes has been introduced in Grooms (2021)[1] …

The GEOS-iODAS: Description and evaluation

G Vernieres, MM Rienecker, R Kovach, CL Keppenne - 2012‏ - ntrs.nasa.gov
This report documents the GMAO's Goddard Earth Observing System sea ice and ocean
data assimilation systems (GEOS iODAS) and their evolution from the first reanalysis test …

GEOS-5 seasonal forecast system

A Borovikov, R Cullather, R Kovach, J Marshak… - Climate Dynamics, 2019‏ - Springer
Ensembles of numerical forecasts based on perturbed initial conditions have long been
used to improve estimates of both weather and climate forecasts. The Goddard Earth …