Interpretation of trends of PM25 and reconstructed visibility from the IMPROVE network.

摘要: Under the IMPROVE visibility monitoring network, federal land managers have monitored and fine particle concentrations at 29 Class I area sites (mostly national parks wilderness areas) Washington, DC since 1988. This paper evaluates trends in reconstructed particles for 10th (best days), 50th (average 90th (worst days) percentiles over nine-year period from 1988-96. Data these provides an indication of regional air quality resulting implementation various emission reduction strategies.