CRTF Telecon - 01-28-2015

Created by william.chong on - Updated on 07/18/2016 10:13

NOAA Climate Reanalysis Teleconference

28 January 2015, 2-3:05pm EST

Recording: https://mapp.adobeconnect.com/p5qp9ktz83j/

Rapporteur: Russ Vose, NOAA NCDC

Theme: Observations

2:00-2:05 Welcome and Introduction. Gil Compo, CIRES/NOAA ESRL

2:05-2:30 Evaluation of Tropical Pacific Observing Systems Using NCEP and GFDL Ocean

Data Assimilation System - Yan Xue, NCEP/CPC.

2:30-3:00 Climate Data Records for Reanalysis - Ed Kearns, NCDC and CDR project team.

presented by Xuepeng "Tom" Zhao, NCDC

/sites/default/files/groups/users/Xuepeng.Zhao/Kearns_CDR%26Reanalysis_v3.pdf

3:00-3:05 Review of upcoming calls. Gil Compo, CIRES/NOAA ESRL

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gilbert.p.comp…

Fri, 01/30/2015 - 14:55

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Dear Xuepeng, Would it be possible to make a version of the radiances that doesn't try to correct for changing equatorial crossing times? A data assimilation system can simply use the data at the time it is applicable. This should also have less error than making an adjustment. best wishes, gil

gilbert.p.comp…

Wed, 01/28/2015 - 14:13

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Tom, Let's continue the discussion via comments to this agenda. The first question is, how are you characterizing the errors of the FCDR values? Do you have a time-varying error distribution, such that values that had to be adjusted less have a smaller error while values that have been adjusted more have a larger error? thanks, gil

FCDR inter-calibraion is performed in detector level by provide digital calibration coefficients, which can be time dependent. First, it is needed to identify a reference (e.g., most advanced radiance observation from current satellite sensors or other observations, such as from airborne sensors) so that adjusted calibration coefficients can be determined and applied to obtain calibrated radiance. We normally request our data production PIs to provide uncertainty estimates along with the radiance/brightness data. For visible FCDR radiance, uncertainty is mainly time dependent. However, for IR or microwave FCDR radiance, uncertainty can be both time and location dependence.

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