# Presentation: 327803

## GOALS FOR THIS MEETING

**Assess transition, report on working groups**
**Specific, “nuts and bolts” definition of ongoing and future problems to be carried out. **
**Specific scientific/assessment problem.**
**Which simulation results and diagnostics are required: do we have them, can we get them.**
**What input do we need for a specific problem (for example, ****METEOROLOGICAL FIELDS****, emission inventories...).**
**In case of a new module, what can of interface do we envision with GMI; what variables are needed from meteorological fields, others...**
**What is the expected time line, point person.**

## GOALS FOR THIS MEETING (II)

**Continue exploration of GMI’s future contributions, IN ADDITION TO ASSESSMENT. Research tool? User support? **

## UEET

**Conference on Aviation in the Atmosphere and Climate (AAC), Friedrichshafen, 7/03**
**Extended abstract submitted on chemical perturbations**
**Peer-reviewed paper based on abstract? (Dec. 31)**
**Report from TRADEOFF**
**Changes in radiative forcing from contrails, cirrus**
**Assessments**
**Sulfate/soot perturbations from aircraft (2004)**
**“****Final” assessment (mid-2006)**
**Decide on “best” set of meteorological fields, other?**
**Use GMI for exploring flight parameters – flight altitude, routing, emission indices...**
**UEET Forum 10/30/03**

## Mannstein, AAC Conference, 2003

## What will GMI do for UEET Final Assessment?

**Use coupled trop/strat model**
**Chemical Perturbations**
**Aerosol Direct Effect**
**Sulfate**
**Soot**
**First indirect effect?**
**Aerosol-cloud interaction? (Nenes)**
**Cirrus? (Not funded...)**
**Contrails?**

## IPCC TIMELINE

## 	QUADRENNIAL OZONE SYMPOSIUM

## FOR ALL WORKING GROUPS

**Specific tasks/point persons**
**Timelines – 18 mos.**
**Met. Fields**
**Model Resolution**
**Specific needs (for NRA, website)**
**Define “routine” diagnostics**
**User support – Needs from “core” group. “Proposal?”**

## WORKING GROUPSI

**GSFC with Dan to sort out existing I/O issues –**
**Synthetic runs (Prather)**
**Stratospheric group**
**Status of current manuscripts**
**Do timelines make sense?**
**Analyses needs we do not have**
**Model resolution**
**WHAT DO WE DO NEXT IN STRATOSPHERE**
**Aerosols**
**Refine paper suggestions - IPCC**
**Look very carefully at timelines AND priorities**
**Aircraft-related issues: contrails, cirrus, what is possible?**
**Diagnostics; analyses needs**
**Wet scavenging schemes**
**Putting in microphysical package: issues**
**Photolysis?**
**Radiative forcing**

## WORKING GROUPS(II)

**Strat-trop**
**Mechanism**
**Testing strategy (tracers, full chemistry)**
**Unify treatment of photolysis, hydrological cycle**
**Scavenge additional species**
**Short-lived compounds (A “quick” application?)**
**Troposphere**
**DEFINE FIRST GENERATION OF MANUSCRIPTS**
**Additional diagnostics**
**What do we do with boundary layer**
**Outline manuscript (When?)**
**DEFINE SECOND GENERATION OF PROBLEMS – IPCC!?**
**Hindcast**
**Lightning**
**HNO3/NOy, PAN/NOy **
**HC ratios**

## WORKING GROUPS(III)

**Aircraft**
**Specific proposal for GMI work for final assessment**
**Numerical issues**
**Multiprocessors**
**TPCORE, resolution, etc.**

## TROPOSPHERIC WORKING GROUPBOUNDARY LAYER MIXING

**Look at profiles -  Harvard (GISS CO, where disagreement is worst)**
**Dan will get monthly average maximum BL height from GISS ? met. Fields**
**Conference call with interested parties- Decide on strategy, implement, rerun full chemistry runs**
**Need to look at simple tracer runs to make sure things are ok.**
**Start runs by ?????**
**Put bulk of comparisons on web site**

## DIAGNOSTICS

**Monthly averaged rates for all thermal and photolytic processes in model – Need post-process Ox (to be defined by Harvard), HOx, P and L of CO, Harvard – Code?**
**3-D vertical advective fluxes (monthly average)**
**2-D tendencies for each operator (latitude and “height”}**
**Deposition fluxes**
**Emissions**
**WANT: Global budgets of ozone, CO, methane, HOx....**
**Diagnosing met. Fields: water vapor, clouds, cloud cover  (see papers**
**WE HAVE SUFFICIENT DIAGNOSTICS FOR FIRST GENERATION OF MANUSCRIPTS**

## PAPERS“FIRST GENERATION” – NO NEW MET FIELDSDRAFTS BY MARCH 31

**I. DESCRIPTION OF PHYSICAL COMPONENTS OF MODEL, DIFFERENCES AMONG MET. FIELDS (Considine) **
**Model Description (Rodriguez)**
**Met. Field comparison/validation for chemistry (H****2****O, convective mass fluxes, clouds, boundary layer) (Prather, Rodriguez, Bergmann,Penner)**
**Rn, Pb  ****7****Be**
**III. DESCRIPTION OF CHEMICAL COMPONENTS OF MODEL/MET. FIELD DIFFERENCES (Rodriguez; Jacob)**
**OH, CH****3****CCl****3**** lifetimes**
**Global budgets of O****3****, CO, CH****4****...**
**2-D tendencies **
**II. Comparison to data (Logan) (Put bulk of comparisons in web site)**
**MOZAIC (Prather, Harvard)**
**Use simple tracers for examples**
**Chatfield, Wang, etc**
**IV. Numerical paper using simple tracers (Prather) **
**Does it improve comparison to observations?**

## Second Generation Papers

**SECOND GENERATION**
**V. Compare two chemical mechanisms (Considine) Second generation**
**NO NEW MET. FIELDS**
**VI. Lightning (Pickering; Chatfield) Sensitivities ****GEOS-TRMM 1998-2001****; others;? **
**VII. Sensitivity to wet scavenging (in conjunction with aerosols?)**
**VII. Hydrocarbon ratios (Wang) (Need HCs at each time step; Fields? C2Cl4, CO, Jacob)**
**VIII. IPCC Impact – Prather, Jacob, Stratospheric people?, Rodriguez**
**Methane feedback lifetime**
**Future changes in ozone, CO, **
**Future OH – Lifetimes**
**Air quality; intercontinental transport?**
**Update GCM fields in view of  future climate forecasts Which ones? Find out: Daniel: GISS; Prather: UKMet; NCAR: Logan; fvGCM: Rodriguez**

## More generations?

**Hindcast 15-40 years? NCEP – MATCH (Logan)**
**Specific campaign/satellite data**
**2000-2001 (****EC-Oslo; NCEP; fvDAS****) Compare all three for campaigns during this period**
**OSSEs**
**GMAO**

## NEXT MEETING

**May 10-12 East Coast. Daniel for meeting committee**
**Different format – one day of working groups, one day of presentations (more scientific) – Invite larger scientific community.**
**Steering Committee: March m  Telecon**