Deposition and processing of airborne nitrogen pollutants in Mediterranean-type ecosystems of southern California
Riggan, PJ; Lockwood, RN; Lopez, EN
HERO ID
36546
Reference Type
Journal Article
Year
1985
Language
English
PMID
| HERO ID | 36546 |
|---|---|
| In Press | No |
| Year | 1985 |
| Title | Deposition and processing of airborne nitrogen pollutants in Mediterranean-type ecosystems of southern California |
| Authors | Riggan, PJ; Lockwood, RN; Lopez, EN |
| Journal | Environmental Science & Technology |
| Volume | 19 |
| Issue | 9 |
| Page Numbers | 781-789 |
| Abstract | Upper San Gabriel Valley Water Association. #Atmospheric N deposition, associated with chronic urban air pollution, has produced stream water nitrate concentrations as high as 7.0 mg of N/l in chaparral watersheds in the San Gabriel Mountains of Los Angeles County, California. Stream water [NO3-] and discharge were greatest at high flow and may have contributed significantly to existing groundwater NO3- pollution. Annual NO3- discharge ranged from 0.04-10.0 kg of N/ha over 4 yr. Canopy throughfall and precipitation inputs of 23.3 and 8.2 kg N ha/yr were high relative to other undisturbed ecosystems nationwide. Dry deposition was apparently a major source of the throughfall N. NO3- concentrations from nearby, relatively unpolluted watersheds were lower by 1-3 orders of magnitude. NO3-yield was elevated on watersheds where chaparral was converted to grassland in 1960 and may be have been accelerated after wildfire because of high postfire NH4+ concentrations and rapid nitrification in terrestrial and aquatic ecosystems. |
| Doi | 10.1021/es00139a003 |
| Pmid | 22196600 |
| Wosid | WOS:A1985APU0900011 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | ECRIB.Environ. Sci. Technol. 19: 781-789. |
| Is Public | Yes |
| Language Text | English |
| Is Qa | No |