Legend
○ Argo
→ Glider
⇉ Radar
> Drifter
○ Ship
Snapshot SST
Four hour SST
6-Day SST & Centiles
Climatology
SST Anom vs Time
Snapshot Chlorophyll-a
Adj. Sea Level Anom.
Non-Tidal Sea Level Anom.
Legend
- ○
- Argo
- →
- Glider
- ⇉
- Radar
- >
- Drifter
- ○
- Ship
Click for more
information
Select region
Snapshot SST
This is our legacy system for displaying the long archive of SST images from the NOAA Polar-Orbiting Environmental Satellites (and MODIS and VIIRS recently). Snapshot SST, as the name suggests, shows individual SST images without any time-averaging. Where the sky is clear, these images provide great detail. Unfortunately, individual SST images almost always have some gaps due to cloud. For this product, we fill those gaps using the last-available view of the ocean, no matter how old that is. The gap filling helps when viewing the animations as the eye is drawn to the movement of the water in cloud-free areas and not the cloud gaps.
Snapshot SST
○ Argo:
pink circle at the location of any profile made in the window t0 +/- 12hrs.
→ Glider:
A blue arrow shows the latest depth-average velocity estimated by the
glider. A trail of arrow heads shows its path in the time-window
listed in the key.
⇉ Radar:
the average velocity using all
available hourly radar velocities from the IMOS radar facility within
a specified time window around t0.
Eg (3-12h avg) indicates a minimum of 3 hourly radar velocity
estimates are required within a 12 hour window. Shown red or blue to
contrast with SST.
> Drifter:
6- or 12-hourly positions (see key) within a window of -4 or -2 to +1
day around t0.
Location and velocity are indicated with pink arrow heads. These are
drogued at 15m on deployment. A drifter that cuts across the
geostrophic velocity more than usual may have lost its drogue.
○ Ship:
Underway water temperature, plotted
hourly, from research vessels (MNF and AIMS) with hull-mounted
intake. Data within t0 +/-
1day is indicated with a small black dot at the ship location and a
black circle indicates the measurement occurred within 12 hours of
t0.
'Altimetric sea level and velocity' are Adjusted Sea level and the geostrophic velocity derived from that, respectively. ASL (ASLA plus Mean Dynamic Topography) is shown as white contours every 0.1m.
Geostrophic velocity: black arrows indicate the path something would travel over a 12hr or 24hr period (as indicated) at this velocity.
The latest ASL (NRT00) map is usually dated 4 days behind real time, as indicated.
The 200m and 2000m isobaths (or see key) are indicated in cyan.