1. 1817-1871 & 1895-1896: Maryland Weather Service Report, Vol. 2, pp.186-187. 1907. 1872-1894 & 1897-2005: US Historical Climatology Network. Baltimore WSO City. Maryland State Climatologist Office

2. Annual Precipitation at Maryland is increasing ~ 2 Inch/100 yr

4. 1817-1895: Maryland Weather Service Report, Vol. 2, 1907, pp.93-94. 1896-2007: US Historical Climatology Network, Version 2, Baltimore Downtown. Overlapping period of two records is 1896-1903. Maryland State Climatologist Office

5. Observed air temperature trend at Maryland, 1.7 F/100 yr, is close to observed global warming trend for the same time interval

8. These Stations Can Be Used to Study 1895-Present MARYLAND Climate Change

9. Seasonal and Diurnal Variations of 10 yr average O 3 Concentration, ppb Shenandoah National Park – Big Meadows. 1983-2002

10. Standard Deviation of O3 Concentration, ppb Shenandoah National Park – Big Meadows. 1983-2002

11. Linear trend in observed variation of Ozone Concentration, ppb/10 yr Shenandoah National Park – Big Meadows. 1983-2002