Clear Sky status and nearterm objectives Joe Vaughan
Clear. Sky: status and near-term objectives Joe Vaughan Charleston Ramos Brian Lamb
Topics Clear. Sky – Plume Rise Field Studies – Ensemble Effort – Current Efforts – Culture of Use – Task 2 assessment – NASA ROSES
Clear. Sky Plume Rise Field Study • Objective: Evaluate CALPUFF plume rise – Measure top of plume height – Collect meteorological data – Document burns visually (Photographs) • Methods – Aircraft measurements – Ground-based measurements – CALPUFF reruns
Field Burn Overview • 76 to 122 Acres • Wheat Stubble & Kentucky Bluegrass
Final Results 2 underestimated plume height, slightly 2 - 3 overestimated plume height Newer emission parameters increase plume rise
Clear. Sky Evaluation • 2003 Clear. Sky Evaluation (Jain, 2004): – Clear. Sky is highly sensitive to Wind Speed & Wind Direction – Small differences in wind direction determine whether or not smoke plumes are predicted to affect an air quality monitoring station – How to represent the uncertainty coming from the meteorological conditions? This motivated an Ensemble experiment! Heitkamp found that 12 -km ECS was slightly better than 4 -km original system. So, what about a 4 -km ensemble?
Culture of Use? ‘Most probable’ results?
Current effort: 3 -D CALPUFF Windrose graphics Interested to do more with 1 -km Clear. Sky… ECY Contract Task 2 Assessment: How to get Clear. Sky ag-burning results into the regional PM results? Clear. Sky and its use don’t necessarily provide realistic agburning emissions, nor PM 2. 5 results! So we’ve proposed a 2004 burn season re-analysis to build met -forecast driven inference rules for ag-burning emissions for AIRPACT.
NASA ROSES Applied Sciences Program Approach to Integrated System Solutions for A Comprehensive Regional Air-Quality Decision Support System for the Pacific Northwest
- Slides: 9