Stereoscopic Height and Wind Retrievals for Aerosol Plumes with the MISR INteractive eXplorer (MINX)

Nelson, David L.; Garay, M. J.; Kahn, Ralph A.; Dunst, Ben A.

doi:10.3390/rs5094593

Cited by 117 publications

(160 citation statements)

References 51 publications

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“…The differences between wind-corrected stereo-height and zero-wind stereo-height were almost always within 500 m. Only 2 % of all the analyzed pixels had wind-corrected stereo-heights and zero-wind stereo-heights differing by more than 1 km, and these pixels were not excluded from the analysis. The horizontal and vertical resolutions for the pixel stereo-height retrieved by MINX were 1.1 km and 275 m, respectively (Nelson et al, 2013).…”

Section: Smoke Pixel Height Retrieval Using Minxmentioning

confidence: 99%

“…Stereo-height retrieval is based on the shifts of pixels relative to the surface between cameras (Nelson et al, 2008(Nelson et al, , 2013. The MINX height retrieval algorithm uses data from the seven inner cameras on MISR, instead of using data from only the three center cameras as does the standard MISR height retrieval algorithm (Moroney et al, 2002).…”

Section: Smoke Pixel Height Retrieval Using Minxmentioning

confidence: 99%

“…We manually screened for smoke plumes with the aid of the MISR INteractive eXplorer software (MINX) developed by the Jet Propulsion Laboratory (Nelson et al, 2008(Nelson et al, , 2013. MINX combines the four spectral bands to form a highresolution true-color image for each of the nine cameras on MISR, and the resulting nine images can be animated.…”

Section: Y Jian and T-m Fu: Injection Heights Of Springtime Biomasmentioning

confidence: 99%

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Injection heights of springtime biomass-burning plumes over peninsular Southeast Asia and their impacts on long-range pollutant transport

Yuan

2014

Atmos. Chem. Phys.

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Abstract. We analyzed observations from the Multi-angle Imaging SpectroRadiometer (MISR) to determine the injection heights of biomass-burning smoke plumes over peninsular Southeast Asia (PSEA, here defined as Vietnam, Cambodia, Thailand, Laos, and Myanmar) in the spring, with the goal of evaluating the impacts on long-range pollutant transport. We retrieved the heights of 22 000 MISR smoke pixels from 607 smoke plumes over PSEA during February to April of the years 2001-2010. Forty-five percent of the analyzed smoke pixels were above the local mean boundary layer (1 km) at MISR overpass time (10:30 a.m. local time). We used the GEOS-Chem model to simulate the transport of PSEA biomass-burning pollutants in March 2001. On a monthly mean basis, we found that the direct injection of 40 % of the PSEA biomass-burning emissions had little impact on the long-range transport of CO to downwind regions, compared to a control simulation where all biomass-burning emissions were released in the boundary layer. This was because CO at the surface over PSEA was efficiently lifted into the free troposphere by deep convection associated with synoptic-scale weather systems. For pollutants with lifetimes shorter than the synoptic timescale, such as black carbon aerosol (BC), their long-range transport was much more sensitive to the initial plume injection height. The direct injection of NO x from PSEA biomass burning into the free troposphere drove increased formation and transport of peroxyacetyl nitrate (PAN), which in turn led to a small increase in ozone over downwind southern China and the northwestern Pacific. The Pacific subtropical high transported BC emitted from PSEA biomass burning to the marine boundary layer over the tropical northwestern Pacific. We compared our model results to aircraft measurements over the northwestern Pacific during the TRACE-P campaign (March 2001). The direct injection of 40 % of the PSEA biomass-burning pollutants into the free troposphere in the model led to a more pronounced BC peak at 3 km over the northwestern Pacific. Our analysis highlights the point that the injection heights of smoke plumes presents great uncertainty over the interpretation of BC measurements downwind of biomass-burning regions.

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Section: Smoke Pixel Height Retrieval Using Minxmentioning

confidence: 99%

Section: Smoke Pixel Height Retrieval Using Minxmentioning

confidence: 99%

Section: Y Jian and T-m Fu: Injection Heights Of Springtime Biomasmentioning

confidence: 99%

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Injection heights of springtime biomass-burning plumes over peninsular Southeast Asia and their impacts on long-range pollutant transport

Yuan

2014

Atmos. Chem. Phys.

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“…Other satellite sensors, notably the Multi-Angle Imaging SpectroRadiometer (MISR) and (Advanced) Along-Track Scanning Radiometers ((A)ATSR), can also provide aerosol heights using multi-angle imaging (i.e., parallax) (Nelson et al, 2013;Fisher et al, 2014). However, with the ability to retrieve data over a much broader spatial domain (thousands of kilometres in the case of MODIS and VIIRS) including aerosol layers far from the source region, ASHE retrievals can complement the existing data sets (Note the multi-angle approach is limited to aerosol plumes that have discernible features, i.e., typically close to their sources; Kahn et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Evaluating the Height of Biomass Burning Smoke Aerosols Retrieved from Synergistic Use of Multiple Satellite Sensors over Southeast Asia

Lee

Hsu

Bettenhausen

et al. 2016

Aerosol Air Qual. Res.

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This study evaluates the height of biomass burning smoke aerosols retrieved from a combined use of Visible Infrared Imaging Radiometer Suite (VIIRS), Ozone Mapping and Profiler Suite (OMPS), and Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) observations. The retrieved heights are compared against spaceborne and ground-based lidar measurements during the peak biomass burning season (March and April) over Southeast Asia from 2013 to 2015. Based on the comparison against CALIOP, a quality assurance (QA) procedure is developed. It is found that 74% (81-84%) of the retrieved heights fall within 1 km of CALIOP observations for unfiltered (QA-filtered) data, with root-mean-square error (RMSE) of 1.1 km (0.8-1.0 km). Eliminating the requirement for CALIOP observations from the retrieval process significantly increases the temporal coverage with only a slight decrease in the retrieval accuracy; for best QA data, 64% of data fall within 1 km of CALIOP observations with RMSE of 1.1 km. When compared with Micro-Pulse Lidar Network (MPLNET) measurements deployed at Doi Ang Khang, Thailand, the retrieved heights show RMSE of 1.7 km (1.1 km) for unfiltered (QA-filtered) data for the complete algorithm, and 0.9 km (0.8 km) for the simplified algorithm.

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“…MISR uses nine cameras, each set at a different angle relative to the ground, to produce a stereo-image of the Earth's surface and atmosphere (Diner et al, 1998). As MISR crosses the equator at 10:30 a.m. local time (LT) during each orbit, Borneo is always imaged during the late morning (Nelson et al, 2009). In this manuscript, we relied on two precompiled databases of Borneo smoke plumes occurring between January 2001 and December 2009.…”

Section: Methodsmentioning

confidence: 99%

Tropical biomass burning smoke plume size, shape, reflectance, and age based on 2001–2009 MISR imagery of Borneo

et al. 2012

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Abstract. Land clearing for crops, plantations and grazing results in anthropogenic burning of tropical forests and peatlands in Indonesia, where images of fire-generated aerosol plumes have been captured by the Multi-angle Imaging SpectroRadiometer (MISR) since 2001. Here we analyze the size, shape, optical properties, and age of distinct fire-generated plumes in Borneo from [2001][2002][2003][2004][2005][2006][2007][2008][2009]. The local MISR overpass at 10:30 a.m. misses the afternoon peak of Borneo fire emissions, and may preferentially sample longer plumes from persistent fires burning overnight. Typically the smoke flows with the prevailing southeasterly surface winds at 3-4 m s −1 , and forms ovoid plumes whose mean length, height, and cross-plume width are 41 km, 708 m, and 27 % of the plume length, respectively. 50 % of these plumes have length between 24 and 50 km, height between 523 and 993 m and width between 18 % and 30 % of plume length. Length and cross-plume width are lognormally distributed, while height follows a normal distribution. Borneo smoke plume heights are similar to previously reported plume heights, yet Borneo plumes are on average nearly three times longer than previously studied plumes. This could be due to sampling or to more persistent fires and greater fuel loads in peatlands than in other tropical forests. Plume area (median 169 km 2 , with 25th and 75th percentiles at 99 km 2 and 304 km 2 , respectively) varies exponentially with length, though for most plumes a linear relation provides a good approximation. The MISR-estimated plume optical properties involve greater uncertainties than the geometric properties, and show patterns consistent with smoke aging. Optical depth increases by 15-25 % in the down-plume direction, consistent with hygroscopic growth and nucleation overwhelming the effects of particle dispersion. Both particle single-scattering albedo and top-of-atmosphere reflectance peak about halfway downplume, at values about 3 % and 10 % greater than at the origin, respectively. The initially oblong plumes become brighter and more circular with time, increasingly resembling smoke clouds. Wind speed does not explain a significant fraction of the variation in plume geometry. We provide a parameterization of plume shape that can help atmospheric models estimate the effects of plumes on weather, climate, and air quality. Plume age, the age of smoke furthest down-plume, is lognormally distributed with a median of 2.8 h (25th and 75th percentiles at 1.3 h and 4.0 h), different from the median ages reported in other studies. Intercomparison of our results with previous studies shows that the shape, height, optical depth, and lifetime characteristics reported for tropical biomass burning plumes on three continents are dissimilar and distinct from the same characteristics of non-tropical wildfire plumes.

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Stereoscopic Height and Wind Retrievals for Aerosol Plumes with the MISR INteractive eXplorer (MINX)

Cited by 117 publications

References 51 publications

Injection heights of springtime biomass-burning plumes over peninsular Southeast Asia and their impacts on long-range pollutant transport

Injection heights of springtime biomass-burning plumes over peninsular Southeast Asia and their impacts on long-range pollutant transport

Evaluating the Height of Biomass Burning Smoke Aerosols Retrieved from Synergistic Use of Multiple Satellite Sensors over Southeast Asia

Tropical biomass burning smoke plume size, shape, reflectance, and age based on 2001–2009 MISR imagery of Borneo

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