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Titolo:
ACIDIC DEPOSITION IN CALIFORNIA - FINDINGS FROM A PROGRAM OF MONITORING AND EFFECTS RESEARCH
Autore:
TAKEMOTO BK; CROES BE; BROWN SM; MOTALLEBI N; WESTERDAHL FD; MARGOLIS HG; CAHILL BT; MUELLER MD; HOLMES JR;
Indirizzi:
CALIF ENVIRONM PROTECT AGCY,AIR RESOURCES BOARD,DIV RES,POB 2815 SACRAMENTO CA 95812
Titolo Testata:
Water, air and soil pollution
fascicolo: 1, volume: 85, anno: 1995,
pagine: 261 - 272
SICI:
0049-6979(1995)85:1<261:ADIC-F>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
SIERRA-NEVADA; DRY DEPOSITION; SOUTHERN-CALIFORNIA; FOREST ECOSYSTEMS; CRITICAL LOADS; JEFFREY PINE; NITROGEN; OZONE; PRECIPITATION; RESPONSES;
Keywords:
CALIFORNIA; ACIDIC DEPOSITION; HUMAN HEALTH; ECOLOGICAL EFFECTS; DEPOSITION FLUXES; MATERIAL DAMAGE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
67
Recensione:
Indirizzi per estratti:
Citazione:
B.K. Takemoto et al., "ACIDIC DEPOSITION IN CALIFORNIA - FINDINGS FROM A PROGRAM OF MONITORING AND EFFECTS RESEARCH", Water, air and soil pollution, 85(1), 1995, pp. 261-272

Abstract

California's 14-year, $25 million acidic deposition program has studied the causes and effects of acidic air pollutants. In contrast to theeastern United States where sulfur-derived (S-derived) by-products from coal combustion dominate precipitation chemistry, nitrogen-derived (N-derived) acids predominate in wet and dry deposition in California. Adverse effects on the human lung have not been observed after short-term exposures to acidity, but extended exposures to ambient acidity may pose a chronic risk. No irreversible, adverse effects on surface waters in the Sierra Nevada mountain range or to the state's forests have been found due to extant acidic inputs. The longer-term outlook for forests is less certain because the impacts observed elsewhere occurred after decades of S and N deposition, but at lower ambient ozone levels. Ozone is the major air pollutant stressor for forests, but atmospheric N has the potential to cause adverse changes in soil nutrient cycling. Impacts on man-made materials in southern California (e.g., galvanized steel) were found to be minor. While California does not have an ambient air quality standard for acidic air pollutants, emissions ofprecursors have declined since the 1960's due to changes in industrial practices, improvements in technology, and adoption of control measures for ozone. Lowering emissions from motor vehicles will be emphasized to prevent future increases in N deposition.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/11/20 alle ore 21:38:57