Atmospheric and precipitation chemistry over the North Atlantic Ocean: Shipboard results, April–May 1984

Church, Thomas M.; Tramontano, J. M.; Whelpdale, D. M.; Andreae, Meinrat O.; Galloway, James N.; Keene, W. C.; Knap, Anthony H.; Tokos, J.J.S.

doi:10.1029/89jd01595

Cited by 46 publications

(21 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, the 206 Pb/ 207 Pb ratios varied from 1.186 to 1.187 in April to 1.177 to 1.180 in November, 1989. That variation is attributed to the relative accumulation of contaminant lead inputs from the North Atlantic trade easterlies between May andOctober, 1989 (Ve´ron et al, 1993). Barrie, 1987, 1989;Hamelin et al, 1989Hamelin et al, , 1997Shen and Boyle, 1988;Church et al, 1990;Ve´ron et al, 1992Ve´ron et al, , 1993Ve´ron et al, , 1994Ve´ron and Church, 1997;this study).…”

Section: Stable Lead Isotopes In the Sargasso Seamentioning

confidence: 99%

“…The extent of such variations seems to be limited to the depth (50 m) of the seasonal thermocline (Levitus, 1982), based on the convergence of isotopic compositions in the vertical profiles in April andNovember, 1989 (Ve´ron et al, 1993). Since purely vertical transport accounts for less than 10% of the 3 H-3 He distribution into the subtropical North Atlantic thermocline (Jenkins, 1980), a ventilated thermocline model for industrial lead distribution within the western Sargasso Sea was developed (Boyle et al, 1986;Shen and Boyle, 1988).…”

Section: Stable Lead Isotopes In the Sargasso Seamentioning

confidence: 99%

“…Numerous studies have documented the complex continental influences on the chemical climatology and composition of the North Atlantic troposphere (e.g., Duce et al, 1975Duce et al, , 1976Prospero and Nees, 1977;Prospero, 1981;Church et al, 1984Church et al, , 1991Galloway et al, 1986). Mineral aerosols deposited to the western North Atlantic primarily originate from North America and are advected across the Atlantic by the prevailing westerlies.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Lead Isotopes in the Western North Atlantic: Transient Tracers of Pollutant Lead Inputs

Véron

Church

Flegal

1998

Environmental Research

View full text Add to dashboard Cite

Section: Stable Lead Isotopes In the Sargasso Seamentioning

confidence: 99%

Section: Stable Lead Isotopes In the Sargasso Seamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Lead Isotopes in the Western North Atlantic: Transient Tracers of Pollutant Lead Inputs

Véron

Church

Flegal

1998

Environmental Research

View full text Add to dashboard Cite

“…Rainwater was not analyzed for Fe content because of difficulties in ensuring trace metal free conditions in such determinations. Instead, we referred to the rain iron concentration data of from Lewes, Delaware, USA (0.27 pM) and Bermuda (0.09 PM), and from Church et al (1991) for oceanic rain (from 0.1 to 0.5 pM) to plan our experiments. Fe concentrations of ambient surface seawater were not measured; concentrations were most likely in the nanomolar to subnanomolar range (Powell et al 1995, Zhuang et al 1995.…”

Section: Methodsmentioning

confidence: 99%

Rainfall stimulation of primary production in western Atlantic Ocean waters:roles of different nitrogen sources and co-limiting nutrients

Paerl¹,

Willey²,

Go³

et al. 1999

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Using shipboard bioassays, w e examined the roles rainfall, individual and combined nutrients play in accelerating primary production in coastal, Gulf Stream and pelagic (Sargasso Sea) locations in the North Atlantic Ocean off North Caroli.na, USA, from 1993 to 1995. Photosynthetic CO, fixation and net chlorophyll a (chl a) production were measured In replicated bioassays to assess individual and combined impacts of d~fferent constituents of atmospheric deposition, including natural rainfall, a synthetic rain mix, dissolved inorganic nitrogen (DIN; NH,', NO3-), dssolved organlc nitrogen (DON; urea), phosphorus (POA3-) and iron (as EDTA-chelated and unchelated FeC13). Natural rainfall and DIN additions most often stimulated CO2 fixation and chl a production, but frequencies and magnitudes of biostimulation, relative to controls, varied between these indicators. Spatial differences in the types and magnitudes of stimulation were also observed. When added in equimolar amounts, NH.,' was, at times, more stimulatory than NO<. The NOT stimulation was significantly enhanced by Fe-EDTA. Urea was marginally stimulatory at the coastal location. Pod3-was never stimulatory. Fe-EDTA and EDTA by themselves stimulated production only at the offshore locations, suggesting increased Fe limitation with increasing distance from land. Synthetic rain, which contained both sources of DIN, but not Fe, generally proved less stimulatory per unit N than natural rainfall. Results lndlcate a broad sensitivity of these waters to N additions, which in the case of NOT are enhanced by Fe-EDTA. At all locations, the h~g h level of stimulation of primary production attributable to natural rain may be due to the supply of both DIN and CO-limiting nutnents (e.g. Fe), contributing to the eutroph~cation potential of waters downwind of urban, industrial and agricultural emissions.

show abstract

“…The IC detection limits were 0.05 mg/L for both NO 3 À and NH 4 þ . Details of the analytical procedures are given in Church et al (1991) and Gao (2002).…”

Section: Atmospheric Sample Collection and Measurementsmentioning

confidence: 99%

Atmospheric Nitrogen Deposition to the New Jersey Coastal Waters and Its Implications

Gao

Kennish

Flynn

2007

Ecological Applications

View full text Add to dashboard Cite

Abstract. In situ measurements of atmospheric NO 3 À and NH 4 þ at Sandy Hook on the northern New Jersey (USA) coast and at Tuckerton on the southern New Jersey coast reveal significant temporal and spatial variations of these inorganic N constituents. The mean concentration of NO 3 À in precipitation was higher at Sandy Hook (44.6 lmol/L) than at Tuckerton (29.1 lmol/L). The mean concentration of NH 4 þ in precipitation exhibited a similar pattern, being higher at Sandy Hook (26.3 lmol/L) than at Tuckerton (18.3 lmol/L). Aerosol NO 3 À and NH 4 þ concentrations at Sandy Hook were also higher than those at Tuckerton. On an annual basis, the total atmospheric deposition of NO 3 À was estimated to be 51. were ,4 lmol/L. In this system, atmospheric deposition accounts for ;39% of the total N load. These results suggest that atmospheric deposition appears to be an important pathway of new N inputs to New Jersey coastal waters and a potentially significant N enrichment source for biotic production.

show abstract

Atmospheric and precipitation chemistry over the North Atlantic Ocean: Shipboard results, April–May 1984

Cited by 46 publications

References 66 publications

Lead Isotopes in the Western North Atlantic: Transient Tracers of Pollutant Lead Inputs

Lead Isotopes in the Western North Atlantic: Transient Tracers of Pollutant Lead Inputs

Rainfall stimulation of primary production in western Atlantic Ocean waters:roles of different nitrogen sources and co-limiting nutrients

Atmospheric Nitrogen Deposition to the New Jersey Coastal Waters and Its Implications

Contact Info

Product

Resources

About