222Rn variations in Mystery Cave, Minnesota
Health Physics
By: R.S. Lively and B.C. Krafthefer
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Abstract
222Rn concentrations and meteorological parameters were measured at 4- h intervals over a 2-y period in Mystery Cave, southeastern Minnesota. Continuous radon monitors and meteorological sensors connected to data loggers were installed at several locations along commercial tour routes. 222Rn concentrations ranged as high as 25 kBq m-3 in summer and 20 kBq m-3 in winter. Average winter concentrations were lower than summer by at least a factor of two. Seasonal radon variations were correlative with outside air temperatures. During the winter, radon concentrations were observed to fluctuate periodically by factors of 20 or more in under 24 h. Both the long- and short-term variations are correlative with temperature- induced mixing of cave air with surface air.
Suggested Citation
Lively, R., Krafthefer, B., 1995, 222Rn variations in Mystery Cave, Minnesota: Health Physics, v. 68, no. 4, p. 590-594.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | 222Rn variations in Mystery Cave, Minnesota |
| Series title | Health Physics |
| Volume | 68 |
| Issue | 4 |
| Year Published | 1995 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Health Physics |
| First page | 590 |
| Last page | 594 |