dor_id: 42027

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650.#.4.x: Físico Matemáticas y Ciencias de la Tierra

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336.#.#.3: Artículo de Investigación

336.#.#.a: Artículo

351.#.#.6: http://revistagi.geofisica.unam.mx/index.php/RGI

351.#.#.b: Geofísica Internacional

351.#.#.a: Artículos

harvesting_group: RevistasUNAM

270.1.#.p: Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx

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856.4.0.u: http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/1153/1131

100.1.#.a: Hofmann, D. J.; Rosen, J. M.

524.#.#.a: Hofmann, D. J., et al. (1984). Measurement of the sulfuric acid weight percent in the stratospheric aerosol from the el Chichón eruption. Geofísica Internacional; Vol. 23 No. 3, 1984. Recuperado de https://repositorio.unam.mx/contenidos/42027

245.1.0.a: Measurement of the sulfuric acid weight percent in the stratospheric aerosol from the el Chichón eruption

502.#.#.c: Universidad Nacional Autónoma de México

561.1.#.a: Instituto de Geofísica, UNAM

264.#.0.c: 1984

264.#.1.c: 2013-04-12

506.1.#.a: La titularidad de los derechos patrimoniales de esta obra pertenece a las instituciones editoras. Su uso se rige por una licencia Creative Commons BY-NC-ND 4.0 Internacional, https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode.es, fecha de asignación de la licencia 2013-04-12, para un uso diferente consultar al responsable jurídico del repositorio por medio de revistagi@igeofisica.unam.mx

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041.#.7.h: spa

520.3.#.a: During a slow balloon descent from 30 km over southern Texas on October 23, 1982, the intake tube to a particle counter capable of measuring the concentrations of r ≥ 0.15 µm and r ≥ 0.25 µm aerosol was heated to 150°C and allowed to cool periodically to determine aerosol volatility. At the time of the measurement, the El Chichón injected aerosol was characterized by two main layers centered at about 17 and 24 km. The upper layer contained the larger particles (main mode radius of ~0.3 µm as compared to ~0.1 µm in the lower layer). The aerosol, when heated, indicated a concentration of ~1% of the ambient values suggesting that most of the particles were highly volatile or had a highly volatile sheath with possibly nonvolatile cores of radii < 0.15 µm. The vertical distribution of the remaining nonvolatile component could be resolved. By observing the temperature at which the bulk of the aerosol was removed (vaporization point) at several altitudes (pressures), a vapor pressure curve was constructed. The results indicate that the volatile material in the upper layer consisted of ~80% H2SO4 - 20% H2O (by weight) while the lower layer consisted of a 60 - 65% acid aerosol. This difference is due mainly to the higher temperatures in the upper layer. The measured sulfuric acid weight percentages are in good agreement with theoretical values as calculated for observed temperatures and typical water vapor concentrations.

773.1.#.t: Geofísica Internacional; Vol. 23 No. 3 (1984)

773.1.#.o: http://revistagi.geofisica.unam.mx/index.php/RGI

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Artículo

Measurement of the sulfuric acid weight percent in the stratospheric aerosol from the el Chichón eruption

Hofmann, D. J.; Rosen, J. M.

Instituto de Geofísica, UNAM, publicado en Geofísica Internacional, y cosechado de Revistas UNAM

Licencia de uso

Procedencia del contenido

Entidad o dependencia
Instituto de Geofísica, UNAM
Revista
Repositorio
Contacto
Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx

Cita

Hofmann, D. J., et al. (1984). Measurement of the sulfuric acid weight percent in the stratospheric aerosol from the el Chichón eruption. Geofísica Internacional; Vol. 23 No. 3, 1984. Recuperado de https://repositorio.unam.mx/contenidos/42027

Descripción del recurso

Autor(es)
Hofmann, D. J.; Rosen, J. M.
Tipo
Artículo de Investigación
Área del conocimiento
Físico Matemáticas y Ciencias de la Tierra
Título
Measurement of the sulfuric acid weight percent in the stratospheric aerosol from the el Chichón eruption
Fecha
2013-04-12
Resumen
During a slow balloon descent from 30 km over southern Texas on October 23, 1982, the intake tube to a particle counter capable of measuring the concentrations of r ≥ 0.15 µm and r ≥ 0.25 µm aerosol was heated to 150°C and allowed to cool periodically to determine aerosol volatility. At the time of the measurement, the El Chichón injected aerosol was characterized by two main layers centered at about 17 and 24 km. The upper layer contained the larger particles (main mode radius of ~0.3 µm as compared to ~0.1 µm in the lower layer). The aerosol, when heated, indicated a concentration of ~1% of the ambient values suggesting that most of the particles were highly volatile or had a highly volatile sheath with possibly nonvolatile cores of radii < 0.15 µm. The vertical distribution of the remaining nonvolatile component could be resolved. By observing the temperature at which the bulk of the aerosol was removed (vaporization point) at several altitudes (pressures), a vapor pressure curve was constructed. The results indicate that the volatile material in the upper layer consisted of ~80% H2SO4 - 20% H2O (by weight) while the lower layer consisted of a 60 - 65% acid aerosol. This difference is due mainly to the higher temperatures in the upper layer. The measured sulfuric acid weight percentages are in good agreement with theoretical values as calculated for observed temperatures and typical water vapor concentrations.
Idioma
spa
ISSN
0016-7169

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