Rain scavenging of tephra aerosols from Mount St. Helens 1980 eruptions

1096 OLR (1990) 37 (12) 90:6980 Nicholls, N., 1990. Low-latitude volcanic eruptions and the El Nifiu/Southcrn Oscillation. [Com- ments on ttandler and Andsager, 1990.] Int. J. Climatol, I0(4):425-429. Bur. of Meteorol. Res. Ctr., GPO Box 1289K, Melbourne 3001, Aus- tralia. 90:6981 Wagner, G.H. and K.E. Steele, 1990. Rain scavenging of tepKra aerosols from Mount St. lleleus 1980 eruptions. J. appl. MeI~ 29(5):368-374. Tephra in the atmosphere from the three major eruptions in 1980 was traced by analyzing the particulate matter from weekly rain collections at 62 sites across the U.S. Dilution of the tephra by other aerosols varied from 20'70 near Mount St. Helens to about 300'70 at downwind sites, which were two days and 3000 km from Mount St. Helens. Atmospheric cleanup of the tephra at a given site occurred in I-2 weeks, sometimes in a few days, as measured by the particulate matter in rain. Dept. of Geol., Univ. of Arkansas, 118 Ozark Hall, Fayetteville, AR 72701, USA. B350. Pollution (see also C210-Chernical pollution, E300--Effects of pollution, F250- Waste disposal) 90:6982 Steyn, D.G. and M. Segal, 1990. Enhancement of cross~ind pollutant dispersion by steadily veering winds in sea breezes. J. appL Afet, 29(5):429-432. An estimate is given of the relative importance of wind veering and turbulent diffusion in the mean horizontal spread of pollutant plumes in the atmosphere. Documented veering rates in sea breezes are used to illustrate the effect, and it is concluded that for typical sea breeze induced veering, the effect will be significant over much of the range of applicability of the Gaussian plume model. Dept. of Geogr., 128-1984 West Mall, Univ. of British Columbia, Vancouver, BC V6t IW5, Canada. B380. Forecasting 90:6983 Leslie, L.M. et al., 1990. The skill of tropical cyclone position forecasting in the Australian region. Aust. met. Mag~ 38(2):87-92. Bur. of Meteorol. Res. Ctr., Melbourne, Australia. C. CHEMICAL OCEANOGRAPHY CI0. Apparatus and methods 90:6984 Berger, G. et al., 1990. Preparation and purification of chlorophylls, bacteriochlorophylls and of their derivatives. J. liquid Chromatog, 13(2):333-344. Service de Biophys., Dept. de Biol., CEN Saclay 91191, Gif sur Yvette Cedex, France. 90:6985 Bishop, J.K.B., 1990. Determination of barium in seawater using vanadium/silicon modifier and direct injection graphite furnace atomic absorp- tion spectrometry, dnalyt. Chem~ 62(6):553-557. Lamont-Doherty Geol. Observ., Palisades, NY 10964, USA. 90:6986 Blain, Strphane et al., 1990. Application of a tetraaza macrocycle immobilized on an organic polymer to the determination of trace amounts of manganese in seawater. Analytica china. Acta, 232(2):331- 336. Inst. d'Etudes Mar., Univ. de Bretagne Occidentale, 6 Ave. le Gorgeu, 29287 Brest Cedex, France. 90:6987 Cofino, W.P., 1989. Methodology of chemical monitoring in the marine env'h'onment. Helgolfmder Mceresunters~ 43(3-4):295-308. Monitoring strategy and critical aspects in the execution are discussed. Examples from the recently

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Transcript of Rain scavenging of tephra aerosols from Mount St. Helens 1980 eruptions

Page 1: Rain scavenging of tephra aerosols from Mount St. Helens 1980 eruptions

1096 OLR (1990) 37 (12)

90:6980 Nicholls, N., 1990. Low-latitude volcanic eruptions

and the El Nifiu/Southcrn Oscillation. [Com- ments on ttandler and Andsager, 1990.] Int. J. Climatol, I0(4):425-429. Bur. of Meteorol. Res. Ctr., GPO Box 1289K, Melbourne 3001, Aus- tralia.

90:6981 Wagner, G.H. and K.E. Steele, 1990. Rain scav-

enging of tepKra aerosols from Mount St. lleleus 1980 eruptions. J. appl. MeI~ 29(5):368-374.

Tephra in the atmosphere from the three major eruptions in 1980 was traced by analyzing the particulate matter from weekly rain collections at 62 sites across the U.S. Dilution of the tephra by other aerosols varied from 20'70 near Mount St. Helens to about 300'70 at downwind sites, which were two days and 3000 km from Mount St. Helens. Atmospheric cleanup of the tephra at a given site occurred in I-2 weeks, sometimes in a few days, as measured by the particulate matter in rain. Dept. of Geol., Univ. of Arkansas, 118 Ozark Hall, Fayetteville, AR 72701, USA.

B350. Pollution (see also C210-Chernical pollution, E300--Effects of pollution, F250- Waste disposal)

90:6982 Steyn, D.G. and M. Segal, 1990. Enhancement of

cross~ind pollutant dispersion by steadily veering winds in sea breezes. J. appL Afet, 29(5):429-432.

An estimate is given of the relative importance of wind veering and turbulent diffusion in the mean horizontal spread of pollutant plumes in the atmosphere. Documented veering rates in sea breezes are used to illustrate the effect, and it is concluded that for typical sea breeze induced veering, the effect will be significant over much of the range of applicability of the Gaussian plume model. Dept. of Geogr., 128-1984 West Mall, Univ. of British Columbia, Vancouver, BC V6t IW5, Canada.

B380. Forecasting 90:6983

Leslie, L.M. et al., 1990. The skill of tropical cyclone position forecasting in the Australian region. Aust. met. Mag~ 38(2):87-92. Bur. of Meteorol. Res. Ctr., Melbourne, Australia.

C. CHEMICAL OCEANOGRAPHY

CI0. Apparatus and methods

90:6984 Berger, G. et al., 1990. Preparation and purification of

chlorophylls, bacteriochlorophylls and of their derivatives. J. liquid Chromatog, 13(2):333-344. Service de Biophys., Dept. de Biol., CEN Saclay 91191, Gif sur Yvette Cedex, France.

90:6985 Bishop, J.K.B., 1990. Determination of barium in

seawater using vanadium/silicon modifier and direct injection graphite furnace atomic absorp- tion spectrometry, dnalyt. Chem~ 62(6):553-557. Lamont-Doherty Geol. Observ., Palisades, NY 10964, USA.

90:6986 Blain, Strphane et al., 1990. Application of a tetraaza

macrocycle immobilized on an organic polymer to the determination of trace amounts of manganese in seawater. Analytica china. Acta, 232(2):331- 336. Inst. d'Etudes Mar., Univ. de Bretagne Occidentale, 6 Ave. le Gorgeu, 29287 Brest Cedex, France.

90:6987 Cofino, W.P., 1989. Methodology of chemical moni-

toring in the marine env'h'onment. Helgolfmder Mceresunters~ 43(3-4):295-308.

Monitoring strategy and critical aspects in the execution are discussed. Examples from the recently