ozconcep

Ozone Conceptual Description for SIPs: 

Ozone Conceptual Description for SIPs Paul Miller NESCAUM November 15, 2006 ***** And Modified by Richard Fields Yesterday!

Background: 

Background EPA GUIDANCE: state SIPs include a “conceptual description” of ozone problem OTC funded NESCAUM to draft the “conceptual description” for the OTR SIP APPENDIX Provides common foundation for all states Avoids redundant efforts amongst states Synthesizes most recent information across OTR States could supplement with state-specific info, depending on needs

Description of conceptual description: 

Description of conceptual description Qualitative Expands upon existing information Addresses questions posed by EPA guidance, e.g.: Is O3 problem local or regional in character? Is transport important? What types of weather lead to high O3? Is O3 limited by NOx, VOCs, or both?

Table of Contents - ozone: 

Table of Contents - ozone Executive Summary Introduction Regional nature Trends Recap of NE ozone studies Meteorology of episodes & transport paths Sea breeze/surface winds Nocturnal low level jets Upper level ozone reservoir Overview of ozone forming emissions (NOx/VOC) Links from science to policy Technical appendices

Slide5: 

THE BASICS EMISSIONS CHEMICAL TRANSFORMATION OZONE TRANSPORT OZONE NONATTAINMENT!

Regional emissions: 

Regional emissions From 2002 NEI NOx emissions:

Regional emissions: 

Regional emissions

Slide8: 

Big Whorls have little Whorls That feed on their velocity, And little whorls have lesser whorls And so on to viscocity - Lewis F. Richardson

Slide9: 

SCALES OF ATMOSPHERIC WHORLS GLOBAL SYNOPTIC MESOSCALE MICROSCALE T R A N S P O R T

Slide10: 

GLOBAL CIRCULATION

Slide13: 

SYNOPTIC SCALE CIRCULATIONS

Slide14: 

MESOSCALE CIRCULATIONS

Transport pathways: 

Transport pathways Largest scale - upper level ozone reservoir Regional scale – mid-level channeled flow; nocturnal low level jets Smaller scale - seabreeze/surface winds

Meteorological & transport paths: 

Meteorological & transport paths

Small scale surface: 

Small scale surface

Regional scale flow: 

Regional scale flow Nocturnal low level jet

Upper level transport: 

Upper level transport Upper level ozone reservoir

OTR-wide low level jet: 

OTR-wide low level jet July 23-24, 2002

Summary: Building upon success: 

Summary: Building upon success Ozone still a regional problem in OTR Danger of labeling as “residual” ozone implies “local-only” problem – throw back to local-only approaches that may not effectively address the full extent of the problem

Summary: Building upon success: 

Summary: Building upon success States’ SIPs must address local as well as downwind impacts – discussions with upwind areas critical Regional NOx controls coupled with appropriate local VOC & NOx measures have proven success record Timely action is critical in order to protect public health

Timeline and status: 

Timeline and status Work effort commenced in May 1st drafts reviewed by states and revisions made in early September Ozone 2nd draft reviewed by states mid-September PM/Haze 2nd draft reviewed by states end of September Final reports released end of October States can add state-specific information for inclusion in their SIPs

Final Report: 

Final Report Report at http://www.nescaum.org Contact: Paul Miller, NESCAUM pmiller@nescaum.org