Dry deposition of nitrate to a deciduous forest
Lovett, GM; Lindberg, SE
| HERO ID | 19331 |
|---|---|
| In Press | No |
| Year | 1986 |
| Title | Dry deposition of nitrate to a deciduous forest |
| Authors | Lovett, GM; Lindberg, SE |
| Journal | Biogeochemistry |
| Volume | 2 |
| Issue | 2 |
| Page Numbers | 137-148 |
| Abstract | Electric Power Research Institute; U.S. Department of Energy. #Because dry-deposition inputs are difficult to measure, they are often ignored in biogeochemical studies. In this study three separate methods were used to estimate dry deposition of nitrate to a deciduous forest (Walker Branch Watershed) in eastern Tennessee. The range of estimates of dry-deposition flux was from 1.8 to 9.1 kg NO-/3-N ha-1 yr-1. Using a hybrid approach that combines some aspects of all three methods. a best estimate of 4.8 kg NO-/3-N ha-1 yr-1 was derived. About 75% of this flux is attributable to deposition of HNO3 vapor with large particles contributing most of the remainder; the contribution from small particles is negligible. The range of estimates obtained from the three techniques suggest that dry-deposition measurements should be interpreted with caution. Our best estimate indicates that dry deposition of NQ is the largest single form of inorganic nitrogen (N) deposition to this forest, contributing almost half of the 10.1 kg N ha-1 total annual input. All of the enhancement of NQ deposition in stemflow and throughfall relative to incident precipitation can be explained by washoff of dry-deposited NO-/3, and some canopy uptake of dry-deposited NO-/3 is suggested. This uptake occurs primarily during the growing season and contributes from 0.2 to 7.5 kg N ha-1 yr-1 to the N requirements of the ecosystem, with a best estimate of 3.2. Despite the uncertainties, the magnitude of the potential input fluxes to forested ecosystems necessitates consideration of nitrate dry deposition in ecosystem nitrogen cycling studies. |
| Doi | 10.1007/BF02180191 |
| Wosid | WOS:A1986D194700002 |
| Url | http://www.springerlink.com/index/10.1007/BF02180191 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | ECRIB.Biogeochemistry 2: 137-148. |
| Is Public | Yes |
| Is Qa | No |