1. Climate Change and Ozone Observation Analysis Dr. Konstantin Vinnikov, Acting State Climatologist for Maryland Prof. Russell Dickerson, Department of Atmospheric and Oceanic Science University of Maryland at College Park, MD Progress Report to MDE June 17, 2008

2. New finding: Significant Long-Term Changes in Summer Season Precipitation and Potomac River Runoff

8. Climatic records for 1985-2007 reveal noticeable decreasing of summer (June-July-August) and February precipitation at Maryland. Analogous, but relatively much larger decreasing of Potomac river runoff is found in hydrological record. Should these observed changes in water resources of Maryland be attributed to global warming? This should be studied. Can these changes in water resources of Maryland be extrapolated in future? This should be studied.

9. BELTSVILLE, MD Analysis of Ozone and Air Temperature Hourly Observation 1989-2007

14. Beltsville, MD Days number with Ozone concentration ≥ 85 ppb JFMAMJJASOND 198900016913105200 1990000-11413124000 19910001815-167-00 1992-00037881000 199300008912166000 199400026161363000 199500202612 4--- 1996------9910-0 199700001816--4-0 199800008-13811000 199900005618171100 2000000058402000 2001000-712570000 2002000011011141000 200300020453-0-- 2004--0151430000 20050002-2-8--00 2006000-35790000 2007000046510000-

15. Beltsville, MD Days number with Ozone concentration ≥ 75 ppb JFMAMJJASOND 1989000491320166500 1990000-42017166100 199100051518-179-00 1992-00051514124000 19930012121721247000 1994000481917154000 1995003371021137--- 1996------121830-0 1997000131218--6-0 1998001011-181116000 1999000161120 4100 200000011191052000 2001000-8169172200 20020001116 177000 200300040879-0-- 2004--1588862000 20050004-8-11--00 2006001-61415131000 200700019121112710-

16. YearDays with observ. Days with event Number of the events with the length ≥ N Days N 1234567891011121314 1989153642414984320000000 19901466323171073210000000 199114578211715107421100000 1992149502211842210000000 19931538127171264442211100 1994153632614954221000000 1995151582111964211111000 199692331210533000000000 1997118451511942211000000 1998143611913865442000000 19991536123131084300000000 2000153371910421100000000 2001152522010765211000000 2002153572311765320000000 200314324149100000000000 200415132228110000000000 2005123331611420000000000 2006151491911753211000000 2007150512014872000000000 BELTSVILLE, MD. Ozone season: May to September Number of events with daily one hour max OZONE is equal or above 75 ppb

17. YearDays with observ. Days with event Number of the events with the length ≥ N Days N 1234567891011121314 1989153431612941100000000 1990146442310641000000000 19911456324171053111100000 199214927196200000000000 1993153512214633210000000 1994153442411421110000000 1995151361710630000000000 19969219116110000000000 199711833168621000000000 1998143421813722000000000 1999153471710954200000000 200015319106210000000000 200115231127543000000000 200215337138653110000000 20031431292100000000000 200415113102100000000000 20051231795210000000000 200615124139110000000000 200715025147310000000000 BELTSVILLE, MD. Ozone season: May to September Number of events with daily one hour max OZONE is equal or above 85 ppb

18. Significant change in Ozone concentration statistics is observed after NOx SIP Call. Change in climatic regime of air temperature accompanies observed change in Ozone concentration. The observed change in air temperature exceeds global warming signal and could be caused by decreasing of PM2.5