NCAR Research Data Archive Blog
1938 atmospheric river that caused the Los Angeles flood of 1938
At least one person asked why I used a reanalysis that does not assimilate satellite water vapor data to study an atmospheric river (AR) event.
That’s a good question because the NOAA/CIRES Twentieth Century Global Reanalysis Version 2c (20thCR V2c) only ingests three things: surface pressure, sea ice coverage and sea surface temperature. The rest of the analysis is generated by the physical models of NOAA’s Global Forecast System (GFS).