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

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

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

Observed air temperature trend at Maryland, 1.7 F/100 yr, is close to observed global warming trend

for the same time interval

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

Seasonal and Diurnal Variations of 10 yr average O3 Concentration, ppb

Shenandoah National Park – Big Meadows. 1983-2002

Standard Deviation of O3 Concentration, ppbShenandoah National Park – Big Meadows. 1983-2002

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