lConcerns
have been expressed about the reliability of model-based estimates of the
natural variability of ocean temperatures (e.g., Lyman et al., 2006)
lCasts doubt on reliability of D&A
results obtained with ocean temperatures
lHow do we address these concerns?
ÆBetter quantification of uncertainties in observed
variability estimates (e.g., AchutaRao et al., 2007). Involves use of both physical models (ocean
data assimilation products) and statistical models
ÆIdentify and adjust for the effects of instrumental
biases in different ocean observing systems (Church et al., in
preparation)
ÆRevisit ocean D&A studies with improved,
bias-corrected observational data
ÆUse proxy data to obtain better constraints on model
estimates of natural internal variability (e.g., multi-century SST reconstructions from corals)