Resolving Surface Currents and Heat Advection with the Global Drifter Array. Rick Lumpkin. Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration. NOAA Climate Observation Program 3 rd Annual System Review April 25-27, 2005.
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Atlantic Oceanographic and Meteorological Laboratory,
National Oceanic and Atmospheric Administration
NOAA Climate Observation Program
3rd Annual System Review
April 25-27, 2005
75% of 1°1°bins!
SST gradient (°C per degree)
Mean heat advection, upper 30m (W/m2)
Anomalous heat advection, upper 30m (W/m2)
(Drifters alone: any process happening in data gaps)
SST: GOOS evaluated by NOAA/NCDC
Accuracy: 2 cm/s
Resolution: 600 km
Number of measurements per month: 1
From Needler et al. 1999: Action plan for GOOS/GCOS and Sustained Observations for CLIVAR.
Pilot project for a NOAA/NESDIS Operational Surface Current Processing and Data Center
(F. Bonjean, J. Gunn, G. Lagerloef, E. Johnson)
AVISO Altimetry product
Collecte Localisation Satellites (CLS)
Topex/Poseidon, Jason-1, ERS-1 and ERS-2
U(t)=U + A u’(t)
Absolute speed (m/s)
(methodology of Niiler et al., 2003)
(centrifugal) (Coriolis) (Pressure gradient)
If we ignore centrifugal
(assume geostrophy), we:
1 0.5 0
R. Lumpkin and G. Goni, NOAA/AOML