THE FUTURE MONITORING CAPABILITIES OF 4 NETWORK CONFIGURATIONS IN EASTERN CANADA

The capability of deposition networks in eastern Canada to resolve reg ional trends has been examined by Blanchard et al. (1996, Atmospheric Environment 30, 2539-2549). This paper extends the earlier methods to permit evaluation of the need for specific individual sites, compariso n of additional network configurations, and consideration of more regi ons. Parameter estimates for the statistical model are improved by usi ng monthly instead of annual data. For the regions that we examined, e liminating all provincial sites in eastern Canada would cause an incre ase of 1 to 6 years in the time required for reaching a 90% probabilit y of detecting the expected future trends. The elimination of certain key provincial sites may increase the uncertainties in the determinati on of deposition isopleths of particular interest, such as the 20 kg h a(-1) yr(-1) contours. The statistical techniques presented here are q uite general and can be extended to statistical tests or estimators ot her than those illustrated here. Copyright (C) 1996 Elsevier Science L td