California Current Ecosystem LTER

Selected outputs, ROMS 4DVAR model fits (P1706, P1604)

Title
Selected modeled output variables from ROMS 4DVAR model fits for the P1706 and P1604 CCE-LTER process cruises

Abstract
Values for Kz and w were extracted from a three-dimensional physical model (9 km horizontal resolution, 42 vertical layers) developed using the Regional Ocean Modeling System (ROMS) four-dimensional variational data assimilation system (4DVAR) (Moore et al., 2011), then depth-interpolated linearly to calculate values at the MLD. Initial and boundary conditions were taken from the California Current System Reanalysis product produced by the University of California, Santa Cruz. Surface forcing was taken from the 9-km resolution Coupled Ocean/Atmosphere Mesoscale Prediction System (COAMPS) (Doyle, Jiang, Chao, & Farrara, 2009; Hodur, 1997). We assimilated satellite remote sensing products (sea surface height from Ssalto/Duacs and sea surface temperature from AVHRR) and in situ temperature and salinity data vertical profiles collected during CTD measurements on our cruise. Assimilated data were used to update model initial conditions and surface forcing to generate a dynamically-consistent month-long model fit covering the duration of each cruise and producing 8-hr averaged outputs. For detailed descriptions of our ROMS 4DVAR approach, see (Song et al., 2012) and (Miller, Song, & Subramanian, 2015). Kz and w were interpolated to CTD cast locations from the 9-km ROMS 4DVAR solution using bilinear 2D interpolation from the four points comprising the nearest neighbors to the cast coordinates.

Keywords
marine, modeling, oceans, eddy diffusion, model, ROMS, vertical, vertical velocity

LTER Data System Record
http://dx.doi.org/10.6073/pasta/16a3e9a155fa583d384774de17dedad3
Projects
California Current Ecosystem LTER

Creators
Song, Hajoon (hajsong@mit.edu)
Kelly, Thomas (tbkelly@alaska.edu)
Wang, Seaver (seaver.wang@duke.edu)
Kranz, Sven (skranz@rice.edu)

Contact
CCE LTER Information Manager (ccelter.im@gmail.com)

Other Personnel
Cassar, Nicolas Co-author
Stukel, Mike Co-author

Data

table model output
Primary data table for this dataset containing ROMS model for physical oceanographic parameters along the expedition paths of the P1706 and P1604 CCE-LTER process cruises
Rows: 34908
Columns: 8
View / Download

Methods


Selected output parameters from ROMS 4DVAR model fits.
Song, H., Miller, A. J., McClatchie, S., Weber, E. D., Nieto, K. M., & Checkley, D. M. (2012). Application of a data-assimilation model to variability of Pacific sardine spawning and survivor habitats with ENSO in the California Current System. Journal of Geophysical Research-Oceans, 117. doi:10.1029/2011jc007302; Miller, A. J., Song, H., & Subramanian, A. C. (2015). The physical oceanographic environment during the CCE-LTER Years: Changes in climate and concepts. Deep-Sea Research Part Ii-Topical Studies in Oceanography, 112, 6-17. doi:10.1016/j.dsr2.2014.01.003