Comparing the Overlapped Cloud Top Altitudes Deduced from A Satellite-Based Retrieval Scheme with Atmospheric Radiation Measurement Ground-Based Measurement
نویسنده
چکیده
The overlapping of high-level cirrus cloud and low-level stratus cloud has posed a major challenge in determining their cloud top altitudes using passive satellite observations. Chang and Li (2005) present a novel satellite retrieval method that takes advantage of the Moderate Resolution Imaging Spectroradiometer (MODIS) data to detect the presence of overlapped cirrus and stratus clouds and determine their cloud top properties using combined information acquired from the MODIS CO2-slicing channels and the visible and infrared window channels. The cloud top height of high-level cirrus cloud is determined from the CO2-slicing retrieval and the cloud top altitude of the lower stratus clouds is estimated from its neighboring cloudy pixels that are identified as single-layer stratus clouds. The Atmospheric Radiation Measurement (ARM) Active Remotely-Sensed Cloud Locations (ARSCL) Value-Added Product (Clothiaux et al. 2000) combines ground-based active measurements from laser ceilometers, microwave radiometers, and micropulse lidars and produces an objective determination of cloud height information.
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