Surface characterisation of the Dome Concordia area (Antarctica) as a potential satellite calibration site, using Spot 4/Vegetation instrument

Six, Delphine; Fily, Michel; Alvain, Séverine; Henry, Patrice; Benoist, Jean-Pierre

doi:10.1016/j.rse.2003.10.006

Cited by 69 publications

(29 citation statements)

References 30 publications

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“…At South Pole, nss sulphates and MSA-derived compounds constitute about 2/3 of the overall particulate matter, while sea-salt content only just exceeds 10%. Therefore, the present results yield a lower sulphate concentration and an intermediate sea-salt concentration compared to those assumed by Six et al (2004) at Dome C, consisting of 70% sulphates and 30% sea salt, and those of Hess et al (1998) in the Antarctic Plateau model of the OPAC code presenting mass fractions of 91% sulphates, 4.5% sea salt and 4.5% mineral dust.…”

Section: Antarctic Aerosol Radiative Propertiessupporting

confidence: 45%

An update on polar aerosol optical properties using POLAR-AOD and other measurements performed during the International Polar Year

Tomasi

Lupi

Mazzola

et al. 2012

Atmospheric Environment

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Section: Antarctic Aerosol Radiative Propertiessupporting

confidence: 45%

An update on polar aerosol optical properties using POLAR-AOD and other measurements performed during the International Polar Year

Tomasi

Lupi

Mazzola

et al. 2012

Atmospheric Environment

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“…Complementarily, the moon is used as a natural and external diffuser to monitor SeaWiFS long-term trends using acquisitions for specific lunar phases [29]. Alternative methods using natural targets from the Earth-atmosphere system were developed: over desert sites [23,24], viewing sunglint [18] or over Antarctica [30]. Nevertheless, some limitations are due to perturbing contribution or inaccuracy on the algorithm, such as aerosol perturbation, seasonal effects, bidirectional effects, spectral behavior modeling, or difficulty to obtain a dense temporal sampling.…”

Section: Multitemporal Monitoringmentioning

confidence: 99%

PARASOL in-flight calibration and performance

et al. 2007

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Since 18 December 2004, the PARASOL satellite is a member of the so-called A-train atmospheric orbital observatory, flying together with Aqua, Aura, CALIPSO, CLOUDSAT, and OCO satellites. These satellites combine for the first time a full suite of instruments for observing aerosols and clouds, using passive radiometer complementarily with active lidar and radar sounders. The PARASOL payload is extensively derived from the instrument developed for the POLDER programs that performs measurements of bidirectionality and polarization for a very wide field-of-view and for a visible͞near-infrared spectral range. An overview of the results obtained during the commissioning phase and the reevaluation after one year in orbit is presented. In-flight calibration methods are briefly described, and radiometric and geometric performances are both evaluated. All algorithms are based on a panel of methods using mainly natural targets previously developed for POLDER missions and adapted or redeveloped in the PARASOL context. Regarding performances, all mission requirements are met except for band 443 (not recommended for use). After one year in orbit, a perfect geometrical stability was found while a slight decrease of the radiometric sensitivity was observed and corrected through an innovative multitemporal algorithm based on observations of bright and scattered convective clouds. The scientific exploitation of PARASOL has now begun, particularly by coupling these specific observations with other A-train sensor measurements.

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“…Although the surface of the Antarctic Plateau has often been considered homogeneous in space and stable in time, especially for the calibration of satellite radiometers (e.g. Loeb, 1997;Six et al, 2004), recent studies pointed out that it is subject to large and rapid variations (e.g. Bindschadler et al, 2005;Lacroix et Champollion et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Summertime evolution of snow specific surface area close to the surface on the Antarctic Plateau

et al. 2015

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Abstract. On the Antarctic Plateau, snow specific surface area (SSA) close to the surface shows complex variations at daily to seasonal scales which affect the surface albedo and in turn the surface energy budget of the ice sheet. While snow metamorphism, precipitation and strong wind events are known to drive SSA variations, usually in opposite ways, their relative contributions remain unclear. Here, a comprehensive set of SSA observations at Dome C is analysed with respect to meteorological conditions to assess the respective roles of these factors. The results show an average 2-to-3-fold SSA decrease from October to February in the topmost 10 cm in response to the increase of air temperature and absorption of solar radiation in the snowpack during spring and summer. Surface SSA is also characterized by significant daily to weekly variations due to the deposition of small crystals with SSA up to 100 m 2 kg −1 onto the surface during snowfall and blowing snow events. To complement these field observations, the detailed snowpack model Crocus is used to simulate SSA, with the intent to further investigate the previously found correlation between interannual variability of summer SSA decrease and summer precipitation amount. To this end, some Crocus parameterizations have been adapted to Dome C conditions, and the model was forced by ERAInterim reanalysis. It successfully matches the observations at daily to seasonal timescales, except for the few cases when snowfalls are not captured by the reanalysis. On the contrary, the interannual variability of summer SSA decrease is poorly simulated when compared to 14 years of microwave satellite data sensitive to the near-surface SSA. A simulation with disabled summer precipitation confirms the weak influence in the model of the precipitation on metamorphism, with only 6 % enhancement. However, we found that disabling strong wind events in the model is sufficient to reconciliate the simulations with the observations. This suggests that Crocus reproduces well the contributions of metamorphism and precipitation on surface SSA, but snow compaction by the wind might be overestimated in the model.

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Surface characterisation of the Dome Concordia area (Antarctica) as a potential satellite calibration site, using Spot 4/Vegetation instrument

Cited by 69 publications

References 30 publications

An update on polar aerosol optical properties using POLAR-AOD and other measurements performed during the International Polar Year

An update on polar aerosol optical properties using POLAR-AOD and other measurements performed during the International Polar Year

PARASOL in-flight calibration and performance

Summertime evolution of snow specific surface area close to the surface on the Antarctic Plateau

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