Article
 

Comparisons of Daily Sea Surface Temperature Analyses for 2007–08

Public Deposited

Contenu téléchargeable

Télécharger le fichier PDF
https://ir.library.oregonstate.edu/concern/articles/7w62f985b

Descriptions

Attribute NameValues
Creator
Abstract
  • Six different SST analyses are compared with each other and with buoy data for the period 2007–08. All analyses used different combinations of satellite data [for example, infrared Advanced Very High Resolution Radiometer (AVHRR) and microwave Advanced Microwave Scanning Radiometer (AMSR) instruments] with different algorithms, spatial resolution, etc. The analyses considered are the National Climatic Data Center (NCDC) AVHRR-only and AMSR+AVHRR, the Navy Coupled Ocean Data Assimilation (NCODA), the Remote Sensing Systems (RSS), the Real-Time Global High-Resolution (RTG-HR), and the Operational SST and Sea Ice Analysis (OSTIA); the spatial grid sizes were 1/4°, 1/4°, 1/9°, 1/11°, 1/12°, and 1/20°, respectively. In addition, all analyses except RSS used in situ data. Most analysis procedures and weighting functions differed. Thus, differences among analyses could be large in high-gradient and data-sparse regions. An example off the coast of South Carolina showed winter SST differences that exceeded 5°C. To help quantify SST analysis differences, wavenumber spectra were computed at several locations. These results suggested that the RSS is much noisier and that the RTG-HR analysis is much smoother than the other analyses. Further comparisons made using collocated buoys showed that RSS was especially noisy in the tropics and that RTG-HR had winter biases near the Aleutians region during January and February 2007. The correlation results show that NCODA and, to a somewhat lesser extent, OSTIA are strongly tuned locally to buoy data. The results also show that grid spacing does not always correlate with analysis resolution. The AVHRR-only analysis is useful for climate studies because it is the only daily SST analysis that extends back to September 1981. Furthermore, comparisons of the AVHRR-only analysis and the AMSR+AVHRR analysis show that AMSR data can degrade the combined AMSR and AVHRR resolution in cloud-free regions while AMSR otherwise improves the resolution. These results indicate that changes in satellite instruments over time can impact SST analysis resolution.
  • Keywords: Ship observations, Boundary currents, Sea surface temperature, Buoy observations, Satellite observations
Resource Type
DOI
Date Available
Date Issued
Citation
  • Reynolds, Richard W., Dudley B. Chelton, 2010: Comparisons of Daily Sea Surface Temperature Analyses for 2007–08. Journal of Climate, 23, 3545–3562.
Journal Title
Journal Volume
  • 23
Journal Issue/Number
  • 13
Déclaration de droits
Funding Statement (additional comments about funding)
  • DBC was supported by NASA Contract 1283973 and 1283976 from the Jet Propulsion Laboratory for funding of Ocean Vector Winds Science Team Activities, and by Award NA03NES4400001 to Oregon State University from NOAA. We are grateful to NCDC and the NOAA Office of Global Programs, which provided partial support for this work.
Publisher
Peer Reviewed
Language
Replaces

Des relations

Parents:

This work has no parents.

Articles

La vignette Titre Date de téléchargement Visibilité actes
file details CheltonDudleyB.CEOAS.ComparisonsDailySea.pdf 2017-07-21 Public Télécharger