Precipitation Composition and Its Variability in the Southern Indian Ocean' Amsterdam Island, 1980-1987
International audience Event precipitation samples have been collected on Amsterdam Island (3f 47' S, 77 • 31' E) from May 1980 through January 1987 and analyzed for SOn-, NO•-, CF, Na + , Mg ++ , I•, Ca ++ , I-1', HCOOt, and CH• COO t. The objective of this paper is to assess the pro...
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1991
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Online Access: | https://hal.science/hal-03583323 https://hal.science/hal-03583323/document https://hal.science/hal-03583323/file/Journal%20of%20Geophysical%20Research%20Atmospheres%20-%2020%20November%201991%20-%20Moody%20-%20Precipitation%20composition%20and%20its%20variability%20in.pdf https://doi.org/10.1029/91JD01921 |
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ftceafr:oai:HAL:hal-03583323v1 2024-09-15T17:38:46+00:00 Precipitation Composition and Its Variability in the Southern Indian Ocean' Amsterdam Island, 1980-1987 Moody, J., L Pszenny, A., a P Gaudry, A. Keene, W., C Galloway, J., N Polian, G. NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) National Oceanic and Atmospheric Administration (NOAA) Centre des Faibles Radioactivités Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS) 1991 https://hal.science/hal-03583323 https://hal.science/hal-03583323/document https://hal.science/hal-03583323/file/Journal%20of%20Geophysical%20Research%20Atmospheres%20-%2020%20November%201991%20-%20Moody%20-%20Precipitation%20composition%20and%20its%20variability%20in.pdf https://doi.org/10.1029/91JD01921 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/91JD01921 hal-03583323 https://hal.science/hal-03583323 https://hal.science/hal-03583323/document https://hal.science/hal-03583323/file/Journal%20of%20Geophysical%20Research%20Atmospheres%20-%2020%20November%201991%20-%20Moody%20-%20Precipitation%20composition%20and%20its%20variability%20in.pdf doi:10.1029/91JD01921 info:eu-repo/semantics/OpenAccess ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research https://hal.science/hal-03583323 Journal of Geophysical Research, 1991, 96 (D11), pp.20769. ⟨10.1029/91JD01921⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 1991 ftceafr https://doi.org/10.1029/91JD01921 2024-07-22T13:12:27Z International audience Event precipitation samples have been collected on Amsterdam Island (3f 47' S, 77 • 31' E) from May 1980 through January 1987 and analyzed for SOn-, NO•-, CF, Na + , Mg ++ , I•, Ca ++ , I-1', HCOOt, and CH• COO t. The objective of this paper is to assess the processes which influence variability in the chemical composition of precipitation at this remote marine site. Back trajectories and gas phase 222 Rn measurements were used to identify source regions and their relative contributions to precipitation composition. The technique of cluster analysis was applied to trajectory data as a method for determining to what degree different atmospheric flow patterns influence variability in the obse•d composition. The dominant source regions for chemical deposition were found to be Madagascar and/or S.E. Africa and the ocean region north and east of Amsterdam Island. A strong seasonal signal in the precipitation composition is illustrated. Processes which influence variability in the chemical composition include the following: seasonality in the source strength of biogenic precursors for non-sea-salt (mss) SOn-, NI• + and carboxylic acids; seasonality in biomass-burning conlinental sources for the concentration of NO a-and a portion of riss CF; and variations in source region driven by daily changes in meteorology, as well as seasonal and annual differences in transport and removal patterns. In addition, interannual differences in riss SOn-concentration appear to be related to fluctuations in large-scale circulation patterns as defined by the Southern Oscillation. Article in Journal/Newspaper Amsterdam Island HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Journal of Geophysical Research 96 D11 20769 |
institution |
Open Polar |
collection |
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
op_collection_id |
ftceafr |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Moody, J., L Pszenny, A., a P Gaudry, A. Keene, W., C Galloway, J., N Polian, G. Precipitation Composition and Its Variability in the Southern Indian Ocean' Amsterdam Island, 1980-1987 |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience Event precipitation samples have been collected on Amsterdam Island (3f 47' S, 77 • 31' E) from May 1980 through January 1987 and analyzed for SOn-, NO•-, CF, Na + , Mg ++ , I•, Ca ++ , I-1', HCOOt, and CH• COO t. The objective of this paper is to assess the processes which influence variability in the chemical composition of precipitation at this remote marine site. Back trajectories and gas phase 222 Rn measurements were used to identify source regions and their relative contributions to precipitation composition. The technique of cluster analysis was applied to trajectory data as a method for determining to what degree different atmospheric flow patterns influence variability in the obse•d composition. The dominant source regions for chemical deposition were found to be Madagascar and/or S.E. Africa and the ocean region north and east of Amsterdam Island. A strong seasonal signal in the precipitation composition is illustrated. Processes which influence variability in the chemical composition include the following: seasonality in the source strength of biogenic precursors for non-sea-salt (mss) SOn-, NI• + and carboxylic acids; seasonality in biomass-burning conlinental sources for the concentration of NO a-and a portion of riss CF; and variations in source region driven by daily changes in meteorology, as well as seasonal and annual differences in transport and removal patterns. In addition, interannual differences in riss SOn-concentration appear to be related to fluctuations in large-scale circulation patterns as defined by the Southern Oscillation. |
author2 |
NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) National Oceanic and Atmospheric Administration (NOAA) Centre des Faibles Radioactivités Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Moody, J., L Pszenny, A., a P Gaudry, A. Keene, W., C Galloway, J., N Polian, G. |
author_facet |
Moody, J., L Pszenny, A., a P Gaudry, A. Keene, W., C Galloway, J., N Polian, G. |
author_sort |
Moody, J., L |
title |
Precipitation Composition and Its Variability in the Southern Indian Ocean' Amsterdam Island, 1980-1987 |
title_short |
Precipitation Composition and Its Variability in the Southern Indian Ocean' Amsterdam Island, 1980-1987 |
title_full |
Precipitation Composition and Its Variability in the Southern Indian Ocean' Amsterdam Island, 1980-1987 |
title_fullStr |
Precipitation Composition and Its Variability in the Southern Indian Ocean' Amsterdam Island, 1980-1987 |
title_full_unstemmed |
Precipitation Composition and Its Variability in the Southern Indian Ocean' Amsterdam Island, 1980-1987 |
title_sort |
precipitation composition and its variability in the southern indian ocean' amsterdam island, 1980-1987 |
publisher |
HAL CCSD |
publishDate |
1991 |
url |
https://hal.science/hal-03583323 https://hal.science/hal-03583323/document https://hal.science/hal-03583323/file/Journal%20of%20Geophysical%20Research%20Atmospheres%20-%2020%20November%201991%20-%20Moody%20-%20Precipitation%20composition%20and%20its%20variability%20in.pdf https://doi.org/10.1029/91JD01921 |
genre |
Amsterdam Island |
genre_facet |
Amsterdam Island |
op_source |
ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research https://hal.science/hal-03583323 Journal of Geophysical Research, 1991, 96 (D11), pp.20769. ⟨10.1029/91JD01921⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/91JD01921 hal-03583323 https://hal.science/hal-03583323 https://hal.science/hal-03583323/document https://hal.science/hal-03583323/file/Journal%20of%20Geophysical%20Research%20Atmospheres%20-%2020%20November%201991%20-%20Moody%20-%20Precipitation%20composition%20and%20its%20variability%20in.pdf doi:10.1029/91JD01921 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/91JD01921 |
container_title |
Journal of Geophysical Research |
container_volume |
96 |
container_issue |
D11 |
container_start_page |
20769 |
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