Oral presentations: Reports on study progress in the Variability, Sensitivity and Aerosol subgroups in support of firming-up the measurement requirements in the atmosphere STM

Variability: Regional scale variation of trace gases as revealed by observations and modeling

o Measurements at the 4 km baseline resolution will capture most of the observed variation

o Regional models adequately represent natural variability for studies

o Current column measurement precisions are sensitive to polluted conditions

o Increased information at high resolution

Atmospheric Group Breakout

Vertical sensitivity: Vertical correlations; use of multispectral retrievals to improve sensitivity to the lowermost troposphere

o Good progress demonstrating improved O3 retrieval sensitivity both in simulations and using actual observations

o Capability clearly demonstrated for COo More work needed to generalize case studieso Vertical correlations; vertical structure o Cross-species correlations

Aerosol: Pixel resolution, aerosol retrieval availability and cloud avoidance

o Baseline 2-km pixel resolution is required for an 8 km AOD product

o Cloud clearing needed at 1 kmo Correlations between AOD/PM

Atmospheric Group Breakout

Other topics: o 2 new IIP instruments for GEO-CAPEo Capabilities of MTG/IRS for atmospheric composition

Mission planning discussion: • Accept current STM as working document, refine as necessary• Work to the Baseline Mission without worrying too much about

Threshold and de-scopes at this stage: science must be compelling to the community!(However, with GEO-CAPE part of an international constellation, Threshold and Baseline could be defined by the currently planned minimum and maximum measurement capabilities)

Atmospheric Group Breakout

Mission planning: • Discussion of hosted payloads and distributed implementation

General agreement that this is the only way GEO-CAPE will fly in the foreseeable future

• Costs would be in line with DS: small $150m, medium $300m, large $720m

• This is an opportunity to redefine perceptions of the mission• Need to work on advocacy, building community• Study areas:

o Simultaneity and overlap of mission componentso Trade-offs on instrumentation/access to spaceo Aim to have science requirements ready for Mission Concept

Review in Spring 2013o These drive Level-1 Document requirements: Only a few more

things needed

Atmospheric Group Breakout

Opportunities: o Exploiting DISCOVER-AQ data o BAMS article (Fishman)o GEO temporal and spatial resolution – sell as breakthroughs;

unique opportunities to test modelso Setup a new set of WGs, focused on science

Mission: o IIP activities need to feed into GEO-CAPE feasibilityo Studies to tie in other observations: aerosol/O3 lidar, IAGOSo Constellation w/Europe and Asia – communities working on

same problemo Geographical domain for GC?o Flexibility in observing structure in order to improve detection

Atmospheric priorities for future work

Responding to user community: o Applications version of the STMo Simulated GEO-CAPE datasets both for visualization and more

quantitative assimilation studieso Focus on AQ – forecasting and attributiono GEO-CAPE presence at next AMI workshopo Focus on AQ – forecasting and attributiono GEO-CAPE presence at next AMI workshop

Strengthening climate ties: o Focus on SLCFso Aerosol forcing integrated over daytime sun angleso Emphasis on CH4 as the GEO-CAPE greenhouse gaso Volcanic SO2o Black/brown carbon info from GEO-CAPE

Atmospheric priorities for future work

Emissions: o Lightning NOx – lightning mapper on GOES-R combined with

NO2 from GEOCAPEo Emissions from Canada/Mexicoo Top-down constraints on emissions: area NOx, NH3, pseudo data

+ OSSEo Sensitivity of emissions to climate changeo NH3 emissions from GEO-CAPEo Source attribution for background ozone; would also get

radiative forcingOSSEs: o OSSES for ozone, ozone-CO-NO2, sensitibity studieso OSSES more attuned to user community: emissions, end impactso Correlations of ozone-CO, ozone-AODo Separating transport from local influences

Atmospheric priorities for future work