A three-dimensional variational data assimilation in support of coastal ocean observing systems

2007 ◽  
Author(s):  
Zhijin Li ◽  
Yi Chao ◽  
John D. Farrara ◽  
Xiaochun Wang ◽  
James C. McWilliams ◽  
...  
Keyword(s):  
Data Assimilation ◽  
Three Dimensional ◽  
Coastal Ocean ◽  
Variational Data Assimilation ◽  
Ocean Observing ◽  
Ocean Observing Systems ◽  
Observing Systems

Introduction to Coastal Ocean Observing Systems

2015 ◽  
pp. 1-10 ◽  
Author(s):  
Yonggang Liu ◽  
Heather Kerkering ◽  
Robert H. Weisberg
Keyword(s):  
Coastal Ocean ◽  
Ocean Observing ◽  
Ocean Observing Systems ◽  
Observing Systems

SEACOOS Program Management

2008 ◽  
Vol 42 (3) ◽  
pp. 17-27 ◽  
Author(s):  
Harvey E. Seim ◽  
James Nelson ◽  
Madilyn Fletcher ◽  
C.N.K. Mooers ◽  
Lundie Spence ◽  
...  
Keyword(s):  
Data Management ◽  
Future Development ◽  
Coastal Ocean ◽  
Lessons Learned ◽  
Unified Approach ◽  
Annual Budget ◽  
History Of ◽  
Ocean Observing ◽  
Ocean Observing Systems ◽  
Observing Systems

The management of the SEACOOS program and its evolution over a five-year period are reviewed. The topics included pertain to the mechanisms used to create a consortium, define its mission, develop and manage its annual budget and tasking cycle; and the history of its focus over a five-year period. The management of SEACOOS was complex and required significant efforts to develop new approaches and collaborative mechanisms. Changes in management were made as weaknesses were identified and to enable a more unified approach to the evaluation, operations, data management and outreach efforts. A number of programmatic lessons learned are summarized that may be of value for future development of regional coastal ocean observing systems.

scholarly journals GPS–Cellular Drifter Technology for Coastal Ocean Observing Systems

2005 ◽  
Vol 22 (9) ◽  
pp. 1381-1388 ◽  
Author(s):  
J. Carter Ohlmann ◽  
Peter F. White ◽  
Andrew L. Sybrandy ◽  
P. Peter Niiler
Keyword(s):  
Real Time ◽  
Coastal Ocean ◽  
Hf Radar ◽  
Near Surface ◽  
Spatial And Temporal Scales ◽  
Time Space ◽  
Position Data ◽  
Ocean Observing ◽  
Ocean Observing Systems ◽  
Observing Systems

Abstract A drifter for observing small spatial and temporal scales of motion in the coastal zone is presented. The drifter uses GPS to determine its position, and the Mobitex terrestrial cellular communications system to transmit the position data in near–real time. This configuration allows position data with order meter accuracy to be sampled every few minutes and transmitted inexpensively. Near-real-time transmission of highly accurate position data enables the drifters to be retrieved and redeployed, further increasing economy. Drifter slip measurements indicate that the drifter follows water to within ∼1–2 cm s−1 during light wind periods. Slip values >1 cm s−1 are aligned with the direction of surface wave propagation and are 180° out of phase, so that the drifter “walks” down waves. Nearly 200 drifter tracks collected off the Santa Barbara, California, coast show comparisons with high-frequency (HF) radar observations of near-surface currents that improve by roughly 50% when the average drifter values are computed from more than 25 observations within a 2-km square HF radar bin. The improvement is the result of drifter resolution of subgrid-scale eddies that are included in time–space-averaged HF radar fields. The average eddy kinetic energy on 2-km space and hour time scales is 25 cm2 s−2, when computed for bins with more than 25 drifter observations. Comparisons with trajectories that are computed from HF radar data show mean separation velocities of 5 and 9 cm s−1 in the along- and across-shore directions, respectively. The drifters resolve scales of motion that are not present in HF radar fields, and are thus complementary to HF radar in coastal ocean observing systems.

Development of a Coastal Ocean Observing System for the Gulf of Mexico

2006 ◽  
Vol 40 (4) ◽  
pp. 100-109 ◽  
Author(s):  
Ann E. Jochens ◽  
Worth D. Nowlin
Keyword(s):  
Gulf Of Mexico ◽  
Storm Surge ◽  
Coastal Ocean ◽  
Global Ocean ◽  
Full Potential ◽  
Emergency Managers ◽  
Wide Range ◽  
Ocean Observing ◽  
Ocean Observing Systems ◽  
Observing Systems

The Gulf of Mexico Coastal Ocean Observing System (GCOOS) is being developed as one of the regional coastal ocean observing systems under the U.S. Integrated Ocean Observing System (IOOS), which is a contribution to the Global Ocean Observing System (GOOS). GCOOS will be a sustained ocean observing system that provides data, information, and products on marine and estuarine systems to a wide range of users. A GCOOS Regional Association (GCOOS-RA) has been established to develop GCOOS. Activities to build GCOOS have included development of an inventory of extant observing systems, connection of real-time physical data from extant systems into the National Data Buoy Center via the Internet, and establishment and implementation of mechanisms for ongoing identification of (1) stakeholder requirements and priorities and (2) priority pilot projects to meet regional needs. A storm surge and inundation workshop is being held to identify the measurements and products needed by emergency managers and responders to better predict and mitigate effects of storm surge and inundation in the southeastern U.S. and Gulf of Mexico. Funding for enhancements to the GCOOS is being sought from governmental and private sources. For GCOOS to evolve to its full potential, new federal resources targeted to regional coastal ocean observing systems must be committed.

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