Atmospheric deposition of nitrogen: Implications for nutrient over-enrichment of coastal waters

Estuaries ◽  
2002 ◽  
Vol 25 (4) ◽  
pp. 677-693 ◽  
Author(s):  
Hans W. Paerl ◽  
Robin L. Dennis ◽  
David R. Whitall
Keyword(s):  
Atmospheric Deposition ◽  
Coastal Waters

scholarly journals Impact of biomass burning on ocean water quality in Southeast Asia through atmospheric deposition: eutrophication modeling

2010 ◽  
Vol 10 (23) ◽  
pp. 11337-11357 ◽  
Author(s):  
P. Sundarambal ◽  
P. Tkalich ◽  
R. Balasubramanian
Keyword(s):  
Water Quality ◽  
Atmospheric Deposition ◽  
Coastal Zone ◽  
Coastal Water ◽  
Coastal Waters ◽  
Companion Paper ◽  
Temporal Variations ◽  
Percentage Increase ◽  
Nitrogen And Phosphorus ◽  
Phosphorus Species

Abstract. Atmospheric deposition of nutrients (N and P species) can intensify anthropogenic eutrophication of coastal waters. It was found that the atmospheric wet and dry depositions of nutrients was remarkable in the Southeast Asian region during the course of smoke haze events, as discussed in a companion paper on field observations (Sundarambal et al., 2010b). The importance of atmospheric deposition of nutrients in terms of their biological responses in the coastal waters of the Singapore region was investigated during hazy days in relation to non-hazy days. The influence of atmospherically-derived, bio-available nutrients (both inorganic and organic nitrogen and phosphorus species) on the coastal water quality between hazy and non-hazy days was studied. A numerical modeling approach was employed to provide qualitative and quantitative understanding of the relative importance of atmospheric and ocean nutrient fluxes in this region. A 3-D eutrophication model, NEUTRO, was used with enhanced features to simulate the spatial distribution and temporal variations of nutrients, plankton and dissolved oxygen due to atmospheric nutrient loadings. The percentage increase of the concentration of coastal water nutrients relative to the baseline due to atmospheric deposition was estimated between hazy and non-hazy days. Model computations showed that atmospheric deposition fluxes of nutrients might account for up to 17 to 88% and 4 to 24% of total mass of nitrite + nitrate-nitrogen in the water column, during hazy days and non-hazy days, respectively. The results obtained from the modeling study could be used for a better understanding of the energy flow in the coastal zone system, exploring various possible scenarios concerning the atmospheric deposition of nutrients onto the coastal zone and studying their impacts on water quality.

Atmospheric Deposition of Nitrogen in Coastal Waters: Biogeochemical and Ecological Implications

2013 ◽  
pp. 11-52 ◽  
Author(s):  
Hans W. Paerl ◽  
Walter R. Boynton ◽  
Robin L. Dennis ◽  
Charles T. Driscoll ◽  
Holly S. Greening ◽  
...  
Keyword(s):  
Atmospheric Deposition ◽  
Coastal Waters ◽  
Ecological Implications

scholarly journals Low Cd content emitted by humans into the atmosphere

2021 ◽  
Vol 276 ◽  
pp. 01002
Author(s):  
Dongfang Yang ◽  
Linzhen Wei ◽  
Shubo Fang ◽  
Min Lu ◽  
Danfeng Yang
Keyword(s):  
Water Quality ◽  
Atmospheric Deposition ◽  
Coastal Waters ◽  
Surface Runoff ◽  
Jiaozhou Bay ◽  
Quality Standard ◽  
Water Area ◽  
The North ◽  
Variation Range

According to the data in May, September and October 1993, the variation range of Cd content in the water body of Jiaozhou Bay was 0.07-0.23μg/L, which conforms to the national water quality standard of Class I. It indicated that in May, September and October, the water in the entire water area of Jiaozhou Bay was not contaminated by Cd content. In May, the variation range of Cd content in the waters of Jiaozhou Bay was 0.09-0.18μg/L. In the coastal waters of the north of Jiaozhou Bay, the Cd content reached a relatively high value, which was 0.18μg/L. In September, the variation range of Cd content in the waters of Jiaozhou Bay was 0.07-0.23μg/L. In the coastal waters of the east of Jiaozhou Bay, the Cd content reached the highest value, 0.23μg/L. In October, the variation range of Cd content in the waters of Jiaozhou Bay was 0.08-0.18μg/L. In the coastal waters of the east of Jiaozhou Bay, the Cd content reached a relative high value, 0.18μg/L. In terms of Cd content, the water quality of Jiaozhou Bay had reached high quality. The water was clean, and it was not polluted by Cd content at all. The Cd content in the waters of Jiaozhou Bay mainly came from two sources, the transport of surface runoff and the transport of atmospheric deposition. The Cd content from surface runoff transportation was 0.18μg/L, and the Cd content from atmospheric deposition transportation was 0.18-0.23μg/L. The Cd content transported by atmospheric deposition was very close to the Cd content transported by surface runoff, and was very low, ranging from 0.18 to 0.23μg/L, far less than 1.00 μg/L. This revealed that the humans had realized the importance of environmental protection, and the emissions to the environment were very low. The atmosphere, land and sea were not polluted by Cd content. The Cd content transported by atmospheric deposition 0.18-0.23μg/L ≥ the Cd content transported by surface runoff 0.18μg/L, which indicated that the Cd content was mainly discharged into the atmosphere by humans and then deposited on the land.

Atmospheric deposition of arsenic and selenium in ombrotrophic peat bogs

2003 ◽  
Vol 107 ◽  
pp. 1427-1427 ◽  
Author(s):  
J. Frank ◽  
M. Krachler ◽  
W. Shotyk
Keyword(s):  
Atmospheric Deposition ◽  
Peat Bogs ◽  
Ombrotrophic Peat
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