A comparison of indices that describe the relationship between exposure to ozone and reduction in the yield of agricultural crops
Lefohn, AS; Laurence, JA; Kohut, RJ
| HERO ID | 42138 |
|---|---|
| In Press | No |
| Year | 1988 |
| Title | A comparison of indices that describe the relationship between exposure to ozone and reduction in the yield of agricultural crops |
| Authors | Lefohn, AS; Laurence, JA; Kohut, RJ |
| Journal | Atmospheric Environment |
| Volume | 22 |
| Issue | 6 |
| Page Numbers | 1229-1240 |
| Abstract | The objective of this study is to compare the use of several indices of exposure in describing the relationship between O3 and reduction in agricultural crop yield. No attempt has been made to determine which exposure-response models best fit the data sets examined. Hourly mean O3 concentration data, based on two-three measurements per hour, were used to develop indices of exposure from soybean and winter wheat experiments conducted in open-top chambers at the Boyce Thompson Institute, Ithaca, New York NCLAN field site. The comparative efficacy of cumulative indices (i.e. number of occurrences equal to or above specific hourly mean concentrations, sum of all hourly mean concentrations equal to or above a selected level, and the weighted sum of all hourly mean concentrations) and means calculated over an experimental period to describe the relationship between exposure to O3 and reductions in the yield of agricultural crops was evaluated. None of the exposure indices consistently provided a best fit with the Weibull and linear models tested. The selection of the model appears to be important in determining the indices that best describe the relationship between exposure and response. The focus of selecting a model should be on fitting the data points as well as on adequately describing biological responses. The investigator should be careful to couple the model with data points derived from indices relevant to the length of exposure. While we have used a small number of data sets, our analysis indicates that exposure indices that weight peak concentrations differently than lower concentrations of an exposure regime can be used in the development of exposure-response functions. Because such indices may have merit from a regulatory perspective, we recommend that additional data sets be used in further analyses to explore the biological rationale for various indices of exposure and their use in exposure-response functions. |
| Doi | 10.1016/0004-6981(88)90353-8 |
| Wosid | WOS:A1988P364600022 |
| Url | https://linkinghub.elsevier.com/retrieve/pii/0004698188903538 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | 1988a in 469,02, 746,05; 1988b in 746,04.Atmos. Environ. 22: 1229-1240. |
| Is Public | Yes |
| Language Text | English |
| Keyword | Effect on crops; ozone; pollution indices |
| Is Peer Review | Yes |
| Relationship(s) |