Introduction to the Conventional Only Reanalysis (CORe)
CORe is an atmospheric reanalysis that is not to be confused with
Common Ocean Reference Experiment (CORE) which also produces
atmospheric state variables.
Some atmospheric reanalyses are designed to produce the best
analyses for reforecasts by assimilating all data including
satellite data. These reanalyses try to optimized the
spatial fidelity. Examples for such reanalyses are CFSR, ERA-5, JRA-55,
Some atmspheric reanalyses limit the data assimilated. This reduces
the errors introduced by changes in the observation network.
Examples include the 20th Century Reanalysis, and ERA-20C. These
reanalyses limit themselves to surface observations, and suffer fewer
trend errors related to changing the observational network. The
disadvantage of this approach is the spatial fidelity is worse.
Some applications, such as climate monitoring, require a design
that is between these two extremes. CORe assimilates in-situ observations
and AMVs. This avoids the climate jumps caused by changes in the
satellite data (as seen in the CFSR). The JRA-55c is similar in
CORe is an atmospheric reanalysis that assimilates,
CORe does not assimilate the following data
- in-situ observations: temperature, winds, humidity, pressure
- Atmospheric Motion Vectors (AMV) from satellites
- Ozone measurements from satellites or conventional instruments
- Thermal radiances from satellites
- Oceanic surface winds based on scatterometers
- winds based on radar, such as VAD winds
CORe was designed for climate monitoring.
Index of pages