# Presentation: 375953

## MERRA Team Meeting 01

## Modern Era Retrospective-analysis for Research and Applications

- Objective – to reprocess the satellite era observations, providing the science and applications (and education) community with consistent long term Earth science data
- Additionally – Advance the understanding of the impact of remote sensing data in long reanalysis
- Scientific focus – Water and energy cycle

## MERRA Configuration

- 30 years duration – Late seventies to present
- Will include the discontinuity in observing system introduced by SSM/I
- Finite Volume Dycore based GCM with NCEP GSI analysis
- Proposed 1 degree resolution
- 1⁄2 degree resolution will be at or ahead of other forthcoming projects
- To begin processing a product in 2006

**Notes:**
What physical data do we get from VTPR

## Year 1 Activities

- Input Data collection and processing
- GEOS4 reprocessing CERES support
- Historical precipitation for assimilation
- Most recent conventional observations and satellite radiances in collaboration with NCEP
- Develop a data plan for the Synergy Project
- Observing System Change Experiments
- Will simulate the pre-SSMI period by removing SSMI during a recent (EOS) period
- Contributes to CCSP reanalysis needs

## Year 1 Activities: Validation Plan

- Validation Implementation Plan
- Development of Independent data
- Coordinated Enhanced Observing Period (CEOP, 7/2001 – 12/2004)

## Validation: CEOP

## Year 1 Activities: Validation Plan

- Validation Implementation Plan
- Development of Independent data
- Coordinated Enhanced Observing Period (CEOP, 7/2001 – 12/2004)
- EOS Aqua and Terra

## Validation: MODIS LST

## Year 1 Activities: Validation Plan

- Validation Implementation Plan
- Development of Independent data
- Coordinated Enhanced Observing Period (CEOP, 7/2001 – 12/2004)
- EOS Level 3 products
- Production Planning and Testing
- Variables and Metrics
- Obs minus Forecast
- Refining and Updating Online Monitoring

## Reanalysis Monitoring Data and Methods

- Documenting Reanalysis Validation
- Emphasizing the needs for reanalysis
- Metrics that are key to “customers”
- Examples
- Upper Tropospheric Humidity
- Surface Temperature
- Precipitation and clouds
- ISCCP, NVAP, NCEP, ERA40 (Climatologic)
- EOS Special Cases (e.g. MODIS)
- Anomalies, Variability and Trends

## Staffing (next few months and on)

- Van Pelt	100%	Data analysis + Interc.
- Wu	100%	Data Analysis? Tracers?
- Verter	100%	Docs and Pop Summary
- Portis	5%		WWW (task before FV)
- Hall	10%		WWW
- Karki	20%		New Data Coll. & Proc.
- Lucchesi	5%		Production
- Collins	5%		Production

## Staffing Continued

- New Post-Doc	 - Science  evaluation
- Mike B. - Paper-pusher, CEOP validations, water Cycle
- Siefried S. - Climate Variability, CCSP Reanalysis
- Gi-Kong K. – Ops., Data, SEEDS
- Eugenia Kalnay – Developing a Reanalysis course
- Co-Is – Arthur Hou, Arlindo da Silva, Bob Atlas, S-J. Lin

## Year 1 Deliverables

- Reanalysis Monitoring Data and Methods Documentation Version 1
- Lessons learned from current “dry runs”
- Experiences and refinements for subsequent versions leading up to production time
- Data impact study of SSMI on GEOS4
- Assess the system with and without SSMI, Is there any apparent treatment for the discontinuity
- Internal Documentation perhaps peer-review
- Assessment of GEOS5 ability, computing performance and readiness for production

## Critical Milestones

- Oct 1, 2004 – Review GEOS5 development and production readiness
- Apr 1, 2005 – Testing of Production system capability 1⁄2 degree (e.g. surface temperature and precipitation assimilation)
- Oct 1, 2005 – Exhaustive production system validation and documentation for the focus period
- Apr 1, 2006 – Reanalysis production begins