NOAA Climate Reanalysis Teleconference
29 October 2014, 2-3pm EDT
Recording: https://mapp.adobeconnect.com/p2w9b4b2ux6/
Rapporteur: Sarah Lu, SUNY-Albany
Theme: Ocean Reanalysis
2:00-2:04 Welcome and introduction of new MAPP Program Manager and NCRTF point of contact Heather Archambault. Gil Compo, U. of Colorado/CIRES & NOAA/ESRL Physical Sciences Division
Welcome guest speakers (Guillaume Verniers from GMAO and Ben Giese from Texas A&M) on two ocean analysis talks
2:04-2:05 Announcement of new co-Lead: Suranjana Saha of NOAA NCEP Environmental Modeling Center
New co-lead, Suru Saha from EMC will replace Mike Ek also from EMC. Suru is also the acting climate team lead at EMC. She may present CFS development plan in an upcoming tele-con.
Welcome Heather Archambault, the new program manager for the MAPP program (the new POC for the working group). A brief self-introduction from Archambault is given.
2:05-2:30pm The impact of the assimilation of Aquarius SSS (level 2, v2.0) in the GEOS ocean data assimilation system. link to abstract. Guillaume Verniers, NASA/GMAO
Question by Arun: Has Guillaume communicated with the Aquarius Science Team on the biases in salinity retrievals they are seeing when comparing with in situ Argo float measurements
Question by Yan: Has the project look at the impacts of assimilation of Aquarius SSS on
improving dynamic height and ocean current. (Not yet)
The work by Pingping Xie, who has generated a blinded SSS analysis using Argo salinity data and satellite SSS from Aquarius and SMOS, was mentioned by Yan. Pingping corrected the biases in Aquarius SSS using a PDF correction, which is similar to Guillaume’s PDF correction using neural network. It might be useful to compare the two approaches. (Will look into Xie’s work)
Jim pointed out that Guillaume’s presentation of Aquarius salinity and Argo salinity showed that Aquarius was much fresher than Argo in the Bay of Bengal. Jim suggests that this was because there is a shallow very fresh layer in this region which might not be well-sampled by the vertical resolution of Argo. (Bay of Bengal was also a place where Aquarius may have significant errors, and the individual sensors on Aquarius disagreed here as well.)
Gil mentioned the shape of pdf with large jump is not often seen. (The pdf seen in in-situ bulk sanity is to be expected)
2:30-2:55pm An ensemble of historical ocean reanalyses with Sparse Input. Ben Giese, Texas A&M, Dept. of Oceanography.
Question by Yun: Has Ben seen a hiatus since 2000 in the historical ocean reanalysis that assimilates
observed SST only. (There appears a hiatus since 2000 in the 0-700m thermosteric sea level, but not in 0-700m heat content. More study is needed.)
2:55-3:00pm. Planning for future calls. Please look over tentative agendas at https://reanalyses.org/task-forces/noaa-climate-reanalysis-task-force-h…