Last Years Messages about Air Quality in GermanyThough Emissions have decreased during the last two decades significantly, exeedances of limit values for PM10, NO2 and target values for O3 still occur.Summer smog has become history in Germany at least for the time being since rural background: ozone peak values have decreased significantly but urban background: ozone values are increasing from low level to a medium high level. Air quality trends seem to be hidden behind inter-annual variations during the period 2000 2006

State of Ambient Air Quality in Germany 2008Exceedances of air quality standards for human health:PM10 daily mean: 18 out of 417 stations, 17 traffic + 1 near industryNO2 annual mean: 89 of 426 stations, all traffic O3max. 8-h mean: 93 of 274 stations, 85 background + 8 near industryOverall observation:one of the best years with respect to exceedances of air quality standards air quality is worst in agglomerations with respect to PM10 and NO2, most hot spots are found at monitoring sites near traffic Ozone is highest in rural areas and is increasing from low levels to higher low levels

Geographical Characteristics of Air Pollution

Geographical Characteristics of Air Pollution

State of Ambient Air Quality in Germany 2008Exceedances of air quality standards:PM10 daily mean: 18 out of 417 stations, 17 traffic + 1 near industryNO2 annual mean: 89 of 426 stations, all traffic O3max. 8-h mean: 93 of 274 stations, 85 background + 8 near industryOverall observation:one of the best years with respect to exceedances of air quality standardsair quality is worst in agglomerations with respect to PM10 and NO2 most hot spots found at monitoring sites near traffic Ozone is highest in rural areas and is increasing from low levels to higher low levels agglomerations seemingly, no clear improvement in the air quality situation since the beginning of this decade

Emission vs. Air Quality normalized to 1995

PM10 annual mean, 2001 -2008

NO2 annual mean, 2001 -2008

Mann Kendall significance testNO2PM10O3

Mann-Kendall Test for Significance in TrendsDeveloped originally for quantifying trends of meteorological time seriesSuitable for time series that are expected to have a monotonic trendwithout seasonal or cyclic fluctuations

OUTPUT: levels of significance (error probability)

mean slope (median of all inter annual changes)

Mann-Kendall Test for NO2 84% with falling trend, thereof 36% with significant trend, 15% rising but uncertain trend

no unique trend 82%with falling trend, thereof 60% with significant

mostly decreasing concentrationrural background: all stations have falling or stagnating trendEvaluation of individual stations 1995 -200752 stations51 stations

Mann-Kendall Test for PM10Evaluation of individual stations 1995 -2007 56%: significant falling trend

significant decrease of concentrations 44%: significant falling trend

significant decrease of concentrationsrural background: no clear trend41 stations48 stations

Mann-Kendall Test for O3Evaluation of individual stations 1995 -2007 57%: significant trend, 70% thereof rising

significant increase of concentrations 58%: rising trend, most of them significant

significant increase of concentrationsrural background: no clear trend23 stations57 stations

Mann-Kendall Test

EOR

Mann-Kendall Test