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 Resolving Surface Currents and Heat Advection with the Global Drifter Array
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Resolving Surface Currents and Heat Advection with the Global Drifter Array
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. - PowerPoint PPT Presentation
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Rick LumpkinAtlantic Oceanographic and Meteorological Laboratory,
National Oceanic and Atmospheric AdministrationAtlantic Oceanographic and Meteorological Laboratory,
National Oceanic and Atmospheric Administration
NOAA Climate Observation Program3rd Annual System Review
April 25-27, 2005
Resolving Surface Currents and Heat Advection with the Global Drifter Array
Resolving Surface Currents and Heat Advection with the Global Drifter Array
1. What we can resolve1. What we can resolve
Time-mean currents75% of 1°1°bins!
Seasonal variations of SSTSeasonal variations of SST
Differences with satellite SST productsDifferences with satellite SST products
Differences with satellite SST productsDifferences with satellite SST products
Mean heat advectionMean heat advectionSST gradient (°C per degree)
Mean heat advection, upper 30m (W/m2)
Advection of SST anomaliesAdvection of SST anomalies
W/m
2
Anomalous heat advection, upper 30m (W/m2)
Surface current anomaliesSurface current anomalies
378 drogued
2. What we aren’t resolving2. What we aren’t resolving
(Drifters alone: any process happening in data gaps)
Eddy fluxes and anomalous advection of mean SSTEddy fluxes and anomalous advection of mean SST
Evaluating the drifter arrayEvaluating the drifter array
SURFACE CURRENTSAccuracy: 2 cm/sResolution: 600 kmNumber of measurements per month: 1
From Needler et al. 1999: Action plan for GOOS/GCOS and Sustained Observations for CLIVAR.
SST: GOOS evaluated by NOAA/NCDCSST: GOOS evaluated by NOAA/NCDC
Evaluating the drifter array
Before and after
3. How can we improve?3. How can we improve?
Predicting the arrayPredicting the array
Predicting the arrayPredicting the array
Include information from other measurements (altimetry, winds)Include information from other
measurements (altimetry, winds)
OSCARPilot project for a NOAA/NESDIS Operational Surface Current Processing and Data Center(F. Bonjean, J. Gunn, G. Lagerloef, E. Johnson)
Pilot project for a NOAA/NESDIS Operational Surface Current Processing and Data Center(F. Bonjean, J. Gunn, G. Lagerloef, E. Johnson)
170ºE-130ºW, 10ºS-10ºN
AvisoAVISO Altimetry productCollecte Localisation Satellites (CLS)Topex/Poseidon, Jason-1, ERS-1 and ERS-2
AVISO Altimetry productCollecte Localisation Satellites (CLS)Topex/Poseidon, Jason-1, ERS-1 and ERS-2
U(t)=U + A u’(t)
(methodology of Niiler et al., 2003)(methodology of Niiler et al., 2003)