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| Titel |
The development of novel stereo derived smoke plume products for AATSR and their application to the 2010 Russian fire season* |
| VerfasserIn |
Daniel Fisher, Jan-Peter Muller, Vladimir Yershov |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250055444
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| Zusammenfassung |
| The development of novel stereo derived smoke plume products for AATSR and their application to the 2010 Russian fire season*
Authors: Daniel Fisher [1], Jan-Peter Muller [1] and Vladimir Yershov [1]
[1] Mullard Space Science Laboratory, University College London, Holmbury St Mary, RH5 6NT, United Kingdom
Biomass burning events in Boreal forests generate significant amounts of important trace gases; including CO2, CO, NOx[1,2]. When the injection height is above the boundary layer (BL) the lifespan of these chemicals is greatly extended, as is their distribution [2]. Typically, in chemical transport models (CTMs) BL injection heights are simplified and assumed to be constant. This is in part due to poor data availability. This leads to a reduction in accuracy of the distribution outputs from such models. To generate better injection height inputs into CTMs, measurements need to be made of smoke plume heights, which can be used as a proxy for aerosol injection height into the atmosphere. One method of measuring smoke plume injection height (SPIH) is through stereo-photogrammetry, originally applied to optically thick clouds [3,4].
Here, we present a new stereo matching method for the determination of SPIHs. It is referred to as M6 due to a shared heritage with the other M-series matchers [3,4]. M6 utilizes novel normalization and matching techniques to generate improved results, in terms of coverage and accuracy, over those matchers of similar type. The application of M6 to SPIH derivation will be shown for a number of dates from the 2010 Russian fire season, which greatly affected the city of Moscow. The scenes are taken from the stereo capable Envisat AATSR instrument for fire events in proximity to Nizhniy Novgorod.
The SPIH products generated for input into CTMs require effective cloud masking to ensure accurate outputs. Therefore in addition to M6 an effective new cloud masking method using a dual stereo technique will be presented. Validation of such results represents a significant challenge and methods including manual stereo measurements will be described as well as potential fusion with MERIS Oxygen A-band SPIH estimates.
* work supported under ESA/ESRIN contract 4200023055/10/I-LG through Noveltis
[1] Crutzen, P. J., L. E. Heidt, et al. (1979). "Biomass Burning as a Source of Atmospheric Gases Co, H-2, N2o, No, Ch3cl and Cos." Nature 282(5736): 253-256.
[2] Martin, M. V., J. A. Logan, et al. (2010). "Smoke injection heights from fires in North America: analysis of 5 years of satellite observations." Atmospheric Chemistry and Physics 10(4): 1491-1510.
[3] Muller, J. P., M. A. Denis, et al. (2007). "Stereo cloud-top heights and cloud fraction retrieval from ATSR-2." International Journal of Remote Sensing 28(9): 1921-1938.
[4] MULLER, J.-P., A. MANDANAYAKE, et al. (2002). “MISR stereoscopic image matchers: Techniques and results.” IEEE Transactions on Geoscience and Remote Sensing 40: 1547–1559. |
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