The page provides time series and map visualizations of daily mean Sea Surface Temperature (SST) from the NOAA Optimum Interpolation SST (OISST) dataset version 2.1. OISST is a 0.25°x0.25° gridded dataset that estimates temperatures based on a blend of satellite, ship, and buoy observations. The OISST data product includes SST anomalies based on 1971–2000 climatology from NOAA. The datset spans 1 January 1982 to present with a 1 to 2-day lag from the current day. OISST files are preliminary for about two weeks until a finalized product file is posted by NOAA. This status is identified on the maps with "[preliminary]" showing in the title, and applies to the time series as well.
thanks we’re on the right track but it’s still lacking the stats. ie what is the distribution of the instruments and how are they weighted ? are dense and sparse weighted equally? how about close and distant instruments to settlements ?
to me collapsing thousands of observations to a single average loses most of the signal
- "DOISST v2.0 and v2.1 have a resolution of daily and 0.25° × 0.25°"
- "The large-scale biases of AVHRR SSTs are corrected against the available in situ observations from ships and buoys in DOISST v2.0 (Reynolds et al. 2007) and from ships, buoys, and Argo floats in this study (v2.1; Table 1). Daily biases of AVHRR SSTs (e.g., 15 January 2020) are calculated in the following procedures: 1) daily AVHRR and in situ SSTs are bin-averaged separately to 2° × 2° grids; 2) daily AVHRR and in situ SSTs are averaged separately within a 15-day running window (e.g., 8–22 January 2020); 3) the averaged AVHRR and in situ SSTs are projected onto a common set of empirical orthogonal teleconnection (EOT) functions; 4) the difference between EOT-filtered AVHRR and in situ SSTs is defined as AVHRR biases; and 5) the daily biases on 2° × 2° grids are interpolated linearly to 0.25° × 0.25° grids and applied to AVHRR SST [see more details in Reynolds et al. (2007); Huang et al. 2015b]."
I'll trust in your competence to answer your remaining questions without my assistance.
