Arctic Mixed-Phase Cloud Properties from AERI Lidar Observations: Algorithm and Results from SHEBA
نویسندگان
چکیده
منابع مشابه
Cloud Phase Determination Using Ground-Based AERI Observations at SHEBA
A new technique for ascertaining the thermodynamic cloud phase from high-spectral-resolution ground-based infrared measurements made by the Atmospheric Emitted Radiance Interferometer (AERI) is presented. This technique takes advantage of the differences in the index of refraction of ice and water between 11 and 19 mm. The differences in the refractive indices translate into differences in clou...
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A novel new approach to retrieve cloud microphysical properties from mixed-phase clouds is presented. This algorithm retrieves cloud optical depth, ice fraction, and the effective size of the water and ice particles from ground-based, high-resolution infrared radiance observations. The theoretical basis is that the absorption coefficient of ice is stronger than that of liquid water from 10 μm t...
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Clouds play a crucial role in the radiative balance of the earth’s surface, particularly in the Arctic where they participate in various feedback mechanisms with the underlying surface that consists of a complex mixture of snow, sea-ice, and open water. Our current understanding of clouds, and especially their representation in climate models, is limited. Longer term observational studies of th...
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The Atmospheric Emitted Radiance Interferometer (AERI) measures downwelling infrared radiance from 550-3000 cm (18.2 – 3.3 μm) at high-spectral-resolution (~ 1 cm) (Knuteson et al. 2004). The original temporal sampling strategy (a 3-min average of sky radiance every 8 min) was chosen to optimize the signal-to-noise in the observations for clear sky applications. Clear-sky AERI observations have...
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Detailed and accurate vertical distributions of cloud properties (such as cloud fraction, cloud phase, and cloud water content) and their changes are essential to accurately calculate the surface radiative flux and to depict the mean climate state. Surface and space-based active sensors including radar and lidar are ideal to provide this information because of their superior capability to detec...
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ژورنال
عنوان ژورنال: Journal of Applied Meteorology
سال: 2005
ISSN: 1520-0450,0894-8763
DOI: 10.1175/jam2208.1