Gridding
sparse ocean observations onto a very high (in this case, 1 - by - 1 degree latitude x longitude) resolution is prone to producing some apparent structures that are simply artifacts of mathematical interpolation, even when isopycnal methods are utilised (this is common for gridding of data).
Not exact matches
Temperature
observations are
sparse around the hostile continent, but scientists recently modeled the
ocean current knock - on effects of these wind changes, which have been caused by ozone thinning and by the buildup of greenhouse gases.
However, these
observations are decidedly
sparse in the deep sea and need to be enhanced, through sustained deep -
ocean observing (e.g., via Deep Argo).
Here the adjustment is determined by (1) calculating the collocated ship - buoy SST difference over the global
ocean from 1982 - 2012, (2) calculating the global areal weighted average of ship - buoy SST difference, (3) applying a 12 - month running filter to the global averaged ship - buoy SST difference, and (4) evaluating the mean difference and its STD of ship - buoy SSTs based on the data from 1990 to 2012 (the data are noisy before 1990 due to
sparse buoy
observations).
Observations alone are too
sparse in the
oceans to describe and understand decadal and longer timescale variations in the
ocean circulation and hence
ocean heat uptake.
Earlier measurements had lowballed heat accumulation due to historically
sparse observations for large parts of the
ocean.
While sea ice thickness
observations are
sparse, here we utilize the
ocean and sea ice model, PIOMAS (Zhang and Rothrock, 2003), to visualize mean sea ice thickness from 1979 to 2018.
Estimates for the deep Southern and Abyssal
Oceans are by Purkey and Johnson (2010) based on
sparse observations.
This way we are able to partly overcome the difficulty associated with
sparse subsurface
ocean observations in the past.»
Such field measurements are
sparse, however, and the record of remotely sensed
ocean color
observations — the chief source of global biogeochemical data today — is limited to the sea surface and does not include a number of key variables.