Climate Reanalysis Task Force Technical Workshop Agenda

May 4-5, 2015
NCWCP Conference Center
5830 University Research Court
College Park, Maryland

Organizers: Jim Carton, Gilbert Compo, Arun Kumar, Suru Saha, Heather Archambault

Workshop Report (OAR Technical Report)

Agenda (pdf) | Reanalyses.org Workshop page

Workshop Objectives

  • Report on NOAA Climate Reanalysis Task Force progress
  • Exchange reanalysis approaches, algorithms, and techniques currently in use and under development.
  • Discuss techniques for addressing outstanding issues in the reanalysis efforts, e.g., presence of spurious discontinuities and trends, coupling of Earth System components, inclusion of new areas such as aerosols.
  • Identify the various requirements for reanalysis products.
  • Determine strategies and overlaps for national and international reanalysis efforts based on scientific drivers for climate and weather research.

Each presentation slot is 80% for oral presentation and 20% for questions.

Monday, May 4 (all times are Eastern Time)

8:00 a.m. Registration
9:00 a.m. Welcome Arun Kumar, NCEP/CPC
9:05 a.m. Introduction to the Climate Reanalysis Task Force and Workshop Gil Compo, University of Colorado/CIRES & NOAA/ESRL/PSD
9:20 a.m. What is Reanalysis for? Huug van den Dool, NCEP/CPC

Session 1: National and International Reanalysis Efforts
Objective: Determine strategies and overlaps for national and international reanalysis efforts based on scientific drivers for climate and weather research.
Session Chair: Gil Compo, University of Colorado/CIRES & NOAA/ESRL/PSD
Rapporteur: Jeff Whitaker, NOAA/ESRL/PSD

9:40 a.m. Plans for Reanalysis at NCEP’s Environmental Modeling Center Suru Saha, NCEP/EMC
10:00 a.m. Issues, Requirements, and Research towards NOAA's Next Generation of Climate Reanalyses Arun Kumar, NCEP/CPC
10:20 a.m. Coffee Break
10:40 a.m. Reanalysis at ECMWF Dick Dee, ECMWF
11:00 a.m. CMA 40-year GSI based reanalysis: plans and progress Zhiquan Liu, NCAR
11:20 a.m. MERRA-2, GMAO reanalysis efforts/plans Ron Gelaro, NASA/GMAO
11:40 a.m. Discussion Moderator: Heather Archambault, NOAA/CPO
12:10 p.m. Lunch

Session 2: Developments in the Stratosphere
Objective: Discuss techniques for addressing outstanding issues in the reanalysis efforts
Session Chair: Ron Gelaro, NASA/GMAO
Rapporteur: Erica Dolinar, University of North Dakota

1:30 p.m. Status at NCEP to improve the stratosphere in reanalysis Craig Long, NCEP/CPC
1:50 p.m. Aerosol modeling Sarah Lu, SUNY-Albany
2:10 p.m. Water vapor in the stratosphere John McCormack, Naval Research Laboratory
2:30 p.m. Aerosol Reanalysis at NASA Goddard Space Flight Center Arlindo da Silva, NASA/GMAO
2:50 p.m. Discussion Moderator: Dan Barrie, NOAA/CPO
3:10 p.m. Coffee Break

Session 3: Assimilation Development and Experiments: Atmosphere
Objectives: Exchange reanalysis approaches, algorithms, and techniques currently in use and under development. Discuss techniques for addressing outstanding issues in the reanalysis efforts.
Session Chair: Arun Kumar, NCEP/CPC
Rapporteur: Lisan Yu, Woods Hole Oceanographic Institute

3:30 p.m. Developments in the Ensemble Kalman Filter Jeff Whitaker, NOAA/ESRL/PSD
3:50 p.m. Forecast results and QBO response from NCEP conventional data only T254 EnKF only cycling semi-Lagrangian Reanalysis in 1970, 1981 Jack Woollen, IMSG & NCEP/EMC
4:10 p.m. Hybrid Data Assimilation at NCEP Daryl Kleist, University of Maryland
4:30 p.m. New applications of Data Assimilation to Reanalysis Eugenia Kalnay, University of Maryland
4:50 p.m. Reanalysis for Tambora 1815 Gil Compo, University of Colorado/CIRES & NOAA/ESRL Physical Sciences Division
5:10 p.m. Discussion Moderator: Gil Compo
5:30 p.m. Close for day
6:30 p.m. Informal dinner at Franklin's

Tuesday, May 5 (all times are Eastern Time)
Session 4: Assimilation Development and Experiments: Ocean and Sea ice
Objectives: Exchange reanalysis approaches, algorithms, and techniques currently in use and under development. Discuss techniques for addressing outstanding issues in the reanalysis efforts.
Session Chair: Suru Saha, NCEP/EMC
Rapporteur: Yan Xue, NCEP/CPC

8:30 a.m. NASA ocean data assimilation Guilliame Vernieres, NASA/GMAO SSAI
9:00 a.m. Impacts of ocean observations on NCEP GODAS analysis Yan Xue, NCEP/CPC
9:15 a.m. Advancing Ocean Data Assimilation and Reanalysis Steve Penny, University of Maryland & NCEP
9:30 a.m. UMD SODA -- problems and progress Jim Carton, University of Maryland
9:45 a.m. The development of NSST within the NCEP GFS/CFS Xu Li, NCEP/EMC
10:00 a.m. Coffee Break
10:30 a.m. ENSO in a large ensemble of historical reanalyses Ben Giese, Texas A&M University
10:45 a.m. Land data assimilation at NCEP/EMC Mike Ek and Jesse Meng, NCEP/EMC
11:00 a.m. Sea ice development at NCEP/EMC Xingren Wu, NCEP/EMC
11:15 a.m. Discussion Moderator: Jim Carton, University of Maryland
12:10 p.m. Lunch

Session 5: Reanalysis Evaluation
Objective: Identify the various requirements for reanalysis products.
Session Chair: Jim Carton, University of Maryland
Rapporteur: Steve Penny, University of Maryland

1:30 p.m. Dry-mass conservation and water consistency in reanalysis Ricardo Todling, NASA/GMAO
1:50 p.m. Air-sea heat and freshwater fluxes in Atmospheric Reanalysis Lisan Yu, Woods Hole Oceanographic Institute
2:10 p.m. Impacts of NCEP Reanalysis R2 and CFSR fluxes on MOM4 simulations Caihong Wen, NCEP/CPC
2:30 p.m. Evaluation and intercomparision of clouds, precipitation, and radiation budgets in recent reanalysis using satellite-surface observations Erica Dolinar, University of North Dakota
2:50 p.m. Coffee Break
3:10 p.m. Investigation of two extreme summer Arctic sea-ice extent anomalies in 2007 and 1996 Xiquan Dong, University of North Dakota
3:30 p.m. Reanalysis evaluation in polar regions Richard Cullather, NASA/GMAO
3:50 p.m. Rapporteurs give 5 minute summary of their sessions National and International Reanalysis Efforts - Jeff Whitaker Developments in the Stratosphere - Erica Dolinar Assimilation Development and Experiments: Atmosphere - Lisan Yu Assimilation Development & Experiments: Ocean & Sea ice - Yan Xue Reanalysis Evaluation - Steve Penny
4:15 p.m. Discussion and writing assignments Moderator: Gil Compo
5:00 p.m. Close of workshop

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