Aerochem-metrics bucket

It is interesting to note that the surface used most widely in the United States is the Aerochem-Metrics bucket Since 1982, the buckets have been deployed at over 100 sites nationwide as part of the National Atmospheric Deposition Program (NADP) (8). This monitoring program has resulted in a sizeable dry deposition flux data base for numerous trace element and ionic species (12). 

Field Operations. Each si e had four automatic precipitation collectors (Aerochem Metrics) and a Universal Recording Weighing Bucket Rain Gauge (Belfort) with an eight-day spring powered clock and strip chart recorder. An event pen marker was interfaced with the samplers and noted the sampler lid open and close times on the rain gauge strip chart. 

Wet deposition was collected on an event basis in polyethylene buckets in Aerochem Metric collectors set to open only during precipitation periods. The precipitation time was determined from a Belfort recording rain-gauge. The precipitation depth (as water equivalent) was determined as the volume of precipitation in the bucket divided by the area of the bucket opening (638 cm2). The precipitation was filtered through 0.4 Aim pore Nuclepore filters to remove particles and was then refrigerated until time for analysis. The ions, N03- and S04--, were analyzed by ion chromatography. 

Figure 5. Aerochem-Metrics Dustfall Bucket during wind tunnel flow visualization (il, 19, 34- ).

Aerochem- 25 cm dia., Metrics and 28 cm deep HASL type Dustfall Buckets Linear Polyethylene 1.5 Automatic rainshield (Figure 5) Dolske and Gatz, 1982 Semonin et al., 1984 Cadle and Dasch, 1985 Dasch, 1985a, 1985b Feely et al., 1985 (12, 19, 34-37)... 

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