The spatial and temporal variation of acidic precipitation in Newfoundland: from source to receptor
In 1981 between the months of July and December precipitation event samples were s collected at the sites of St. John's, Cape Broyle, Bishop's Falls, Grand Lake, Norris Point, Salmon Dam and Godaleich Pond on the island of Newfoundland in order to determine the acidity of precipitation on...
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Memorial University of Newfoundland
1984
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ftmemorialuniv:oai:research.library.mun.ca:5527 2023-10-01T03:57:35+02:00 The spatial and temporal variation of acidic precipitation in Newfoundland: from source to receptor McCullough, Philippa Mary 1984 application/pdf https://research.library.mun.ca/5527/ https://research.library.mun.ca/5527/1/McCullough_PhilippaMary.pdf https://research.library.mun.ca/5527/3/McCullough_PhilippaMary.pdf en eng Memorial University of Newfoundland https://research.library.mun.ca/5527/1/McCullough_PhilippaMary.pdf https://research.library.mun.ca/5527/3/McCullough_PhilippaMary.pdf McCullough, Philippa Mary <https://research.library.mun.ca/view/creator_az/McCullough=3APhilippa_Mary=3A=3A.html> (1984) The spatial and temporal variation of acidic precipitation in Newfoundland: from source to receptor. Masters thesis, Memorial University of Newfoundland. thesis_license Thesis NonPeerReviewed 1984 ftmemorialuniv 2023-09-03T06:45:24Z In 1981 between the months of July and December precipitation event samples were s collected at the sites of St. John's, Cape Broyle, Bishop's Falls, Grand Lake, Norris Point, Salmon Dam and Godaleich Pond on the island of Newfoundland in order to determine the acidity of precipitation on the island. -- The samples were analyzed for pH, conductivity, sulphate, nitrate, ammonium, chloride, sodium, potassium, magnesium and calcium. Those samples which were obviously contaminated were discarded which left 60 samples in total. For these accompanying meteorological conditions were determined, namely weather type (i.e. history of the appropriate low pressure track), trajectory sector (from determination of 850 mbar. back-trajectories), antecedent rainfall duration, rainfall total and rainfall intensity. The combination of rainfall totals and precipitation chemistry results enabled the calculation of deposition values of SO⁼₄, NO⁻₃ and H⁺ --factors considered most important with respect to precipitation acidity. From these results the influence of meteorological variables was determined from subjective and objective analyses in the form of basic and multiple correlation. -- Although in a study of precipitation chemistry variability this sampling period was too short to negate the effects of natural variability, certain patterns did emerge which appear to result from the influence of specific variables. Antecedent rainfall duration, weather type and trajectory sector were the most influential variables on precipitation chemistry, although it is difficult to separate them since they are interdependent to a large extent. The most acidic events both in chemical concentration and total deposition of SO⁼₄, NO⁻₃ and H⁺ were associated with lows that had arrived over the island via Labrador and Quebec. Trajectory Sector 2, which includes high emission areas north of the Great Lakes contained the most acidic events with respect to concentrations (SO⁼₄ 1.66 mg.1⁻¹, NO⁻₃ 0.66 mg.1⁻¹, pH 4.55). However, Sectors 4 (41.6% H⁺) and 3 ... Thesis Newfoundland Memorial University of Newfoundland: Research Repository Newfoundland Norris Point ENVELOPE(-57.882,-57.882,49.517,49.517) |
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Memorial University of Newfoundland: Research Repository |
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language |
English |
description |
In 1981 between the months of July and December precipitation event samples were s collected at the sites of St. John's, Cape Broyle, Bishop's Falls, Grand Lake, Norris Point, Salmon Dam and Godaleich Pond on the island of Newfoundland in order to determine the acidity of precipitation on the island. -- The samples were analyzed for pH, conductivity, sulphate, nitrate, ammonium, chloride, sodium, potassium, magnesium and calcium. Those samples which were obviously contaminated were discarded which left 60 samples in total. For these accompanying meteorological conditions were determined, namely weather type (i.e. history of the appropriate low pressure track), trajectory sector (from determination of 850 mbar. back-trajectories), antecedent rainfall duration, rainfall total and rainfall intensity. The combination of rainfall totals and precipitation chemistry results enabled the calculation of deposition values of SO⁼₄, NO⁻₃ and H⁺ --factors considered most important with respect to precipitation acidity. From these results the influence of meteorological variables was determined from subjective and objective analyses in the form of basic and multiple correlation. -- Although in a study of precipitation chemistry variability this sampling period was too short to negate the effects of natural variability, certain patterns did emerge which appear to result from the influence of specific variables. Antecedent rainfall duration, weather type and trajectory sector were the most influential variables on precipitation chemistry, although it is difficult to separate them since they are interdependent to a large extent. The most acidic events both in chemical concentration and total deposition of SO⁼₄, NO⁻₃ and H⁺ were associated with lows that had arrived over the island via Labrador and Quebec. Trajectory Sector 2, which includes high emission areas north of the Great Lakes contained the most acidic events with respect to concentrations (SO⁼₄ 1.66 mg.1⁻¹, NO⁻₃ 0.66 mg.1⁻¹, pH 4.55). However, Sectors 4 (41.6% H⁺) and 3 ... |
format |
Thesis |
author |
McCullough, Philippa Mary |
spellingShingle |
McCullough, Philippa Mary The spatial and temporal variation of acidic precipitation in Newfoundland: from source to receptor |
author_facet |
McCullough, Philippa Mary |
author_sort |
McCullough, Philippa Mary |
title |
The spatial and temporal variation of acidic precipitation in Newfoundland: from source to receptor |
title_short |
The spatial and temporal variation of acidic precipitation in Newfoundland: from source to receptor |
title_full |
The spatial and temporal variation of acidic precipitation in Newfoundland: from source to receptor |
title_fullStr |
The spatial and temporal variation of acidic precipitation in Newfoundland: from source to receptor |
title_full_unstemmed |
The spatial and temporal variation of acidic precipitation in Newfoundland: from source to receptor |
title_sort |
spatial and temporal variation of acidic precipitation in newfoundland: from source to receptor |
publisher |
Memorial University of Newfoundland |
publishDate |
1984 |
url |
https://research.library.mun.ca/5527/ https://research.library.mun.ca/5527/1/McCullough_PhilippaMary.pdf https://research.library.mun.ca/5527/3/McCullough_PhilippaMary.pdf |
long_lat |
ENVELOPE(-57.882,-57.882,49.517,49.517) |
geographic |
Newfoundland Norris Point |
geographic_facet |
Newfoundland Norris Point |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_relation |
https://research.library.mun.ca/5527/1/McCullough_PhilippaMary.pdf https://research.library.mun.ca/5527/3/McCullough_PhilippaMary.pdf McCullough, Philippa Mary <https://research.library.mun.ca/view/creator_az/McCullough=3APhilippa_Mary=3A=3A.html> (1984) The spatial and temporal variation of acidic precipitation in Newfoundland: from source to receptor. Masters thesis, Memorial University of Newfoundland. |
op_rights |
thesis_license |
_version_ |
1778529271556341760 |