Tropical tape recorder observed in HCN

H. C. Pumphrey; C. Boone; K. A. Walker; P. Bernath; N. J. Livesey

doi:10.1029/2007GL032137

Tropical tape recorder observed in HCN

H. C. Pumphrey, C. Boone, K. A. Walker, P. Bernath, N. J. Livesey

Chemistry

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Abstract

The tropical tape recorder is an effect in which a seasonal cycle in the mixing ratio of a gas is imposed on air entering the stratosphere and is then transported upwards by the Brewer-Dobson circulation. We report the observation of this effect in the mixing ratio of HCN, as measured by two satellite instruments: MLS on Aura and ACE-FTS on SCISAT-1. The cycle does not repeat every year; the data so far suggest that the dominant period is about two years. The reason for this periodicity is not yet fully understood. Comparisons with MODIS fire-count data suggest that it may be connected to inter-annual variations in biomass burning in Indonesia and the surrounding region.

Original language	English
Article number	L05801
Pages (from-to)	-
Number of pages	6
Journal	Geophysical Research Letters
Volume	35
Issue number	5
DOIs	https://doi.org/10.1029/2007GL032137
Publication status	Published - 1 Mar 2008

Keywords

ATMOSPHERIC CHEMISTRY
HYDROGEN-CYANIDE
MLS

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10.1029/2007GL032137

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abstract = "The tropical tape recorder is an effect in which a seasonal cycle in the mixing ratio of a gas is imposed on air entering the stratosphere and is then transported upwards by the Brewer-Dobson circulation. We report the observation of this effect in the mixing ratio of HCN, as measured by two satellite instruments: MLS on Aura and ACE-FTS on SCISAT-1. The cycle does not repeat every year; the data so far suggest that the dominant period is about two years. The reason for this periodicity is not yet fully understood. Comparisons with MODIS fire-count data suggest that it may be connected to inter-annual variations in biomass burning in Indonesia and the surrounding region.",

keywords = "ATMOSPHERIC CHEMISTRY, HYDROGEN-CYANIDE, MLS",

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T1 - Tropical tape recorder observed in HCN

AU - Pumphrey, H. C.

AU - Boone, C.

AU - Walker, K. A.

AU - Bernath, P.

AU - Livesey, N. J.

PY - 2008/3/1

Y1 - 2008/3/1

N2 - The tropical tape recorder is an effect in which a seasonal cycle in the mixing ratio of a gas is imposed on air entering the stratosphere and is then transported upwards by the Brewer-Dobson circulation. We report the observation of this effect in the mixing ratio of HCN, as measured by two satellite instruments: MLS on Aura and ACE-FTS on SCISAT-1. The cycle does not repeat every year; the data so far suggest that the dominant period is about two years. The reason for this periodicity is not yet fully understood. Comparisons with MODIS fire-count data suggest that it may be connected to inter-annual variations in biomass burning in Indonesia and the surrounding region.

AB - The tropical tape recorder is an effect in which a seasonal cycle in the mixing ratio of a gas is imposed on air entering the stratosphere and is then transported upwards by the Brewer-Dobson circulation. We report the observation of this effect in the mixing ratio of HCN, as measured by two satellite instruments: MLS on Aura and ACE-FTS on SCISAT-1. The cycle does not repeat every year; the data so far suggest that the dominant period is about two years. The reason for this periodicity is not yet fully understood. Comparisons with MODIS fire-count data suggest that it may be connected to inter-annual variations in biomass burning in Indonesia and the surrounding region.

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KW - MLS

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JF - Geophysical Research Letters

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Tropical tape recorder observed in HCN

Abstract

Keywords

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