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 |
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Article number | L05801 |
Pages (from-to) | - |
Number of pages | 6 |
Journal | Geophysical Research Letters |
Volume | 35 |
Issue number | 5 |
DOIs | |
Publication status | Published - 1 Mar 2008 |
Keywords
- ATMOSPHERIC CHEMISTRY
- HYDROGEN-CYANIDE
- MLS