Episodic nature of wet deposition of acidic material at a site in south-east England

I J Beverland, J M Crowther, M S N Srinivas

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The causal factors for episodic deposition of acidic material in rainfall cannot be fully understood from conventional daily network data. A brief review of the meteorological conditions leading to episodes is given. A definition of 'episodicity' was considered and applied to a 6 month data set collected at high temporal resolution using a microprocessor based acid rain monitor at a site in south-east England. The deposition was highly episodic for all of the measured variables when data from individual rain events were considered. Combining the data into daily averages resulted in changes of episodicity classification for several chemical species. A large percentage of the total deposition recorded during the field experiment occurred in a 5 day period when there was an independent report of ecological damage at other locations in England. Nitrate deposition showed the highest degree of episodicity with 51% of the 6 month total occurring during the 5 day episode. Meteorological details of the transport and wet deposition processes during this period were examined. Back trajectory analysis indicated that the episode was the result of pollutant loading in eastern and central Europe of the air masses reaching the site together with an absence of upwind precipitation scavenging.

LanguageEnglish
Pages73-91
Number of pages19
JournalWater, Air, and Soil Pollution
Volume96
Issue number1-4
DOIs
Publication statusPublished - May 1997

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wet deposition
Rain
Acid Rain
acid rain
Acid rain
air mass
Scavenging
Nitrates
trajectory
Microprocessor chips
nitrate
rainfall
damage
Trajectories
material
pollutant
Air
Experiments

Keywords

  • acid deposition episodes
  • acid rain
  • back trajectory analysis
  • precipitation scavenging
  • sub-event chemistry
  • sub-event sampling
  • Scottish Highlands
  • dry deposition
  • rain
  • pollution
  • sulfate

Cite this

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title = "Episodic nature of wet deposition of acidic material at a site in south-east England",
abstract = "The causal factors for episodic deposition of acidic material in rainfall cannot be fully understood from conventional daily network data. A brief review of the meteorological conditions leading to episodes is given. A definition of 'episodicity' was considered and applied to a 6 month data set collected at high temporal resolution using a microprocessor based acid rain monitor at a site in south-east England. The deposition was highly episodic for all of the measured variables when data from individual rain events were considered. Combining the data into daily averages resulted in changes of episodicity classification for several chemical species. A large percentage of the total deposition recorded during the field experiment occurred in a 5 day period when there was an independent report of ecological damage at other locations in England. Nitrate deposition showed the highest degree of episodicity with 51{\%} of the 6 month total occurring during the 5 day episode. Meteorological details of the transport and wet deposition processes during this period were examined. Back trajectory analysis indicated that the episode was the result of pollutant loading in eastern and central Europe of the air masses reaching the site together with an absence of upwind precipitation scavenging.",
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Episodic nature of wet deposition of acidic material at a site in south-east England. / Beverland, I J ; Crowther, J M ; Srinivas, M S N .

In: Water, Air, and Soil Pollution , Vol. 96, No. 1-4, 05.1997, p. 73-91.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Episodic nature of wet deposition of acidic material at a site in south-east England

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AU - Crowther, J M

AU - Srinivas, M S N

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