Cloud Microphysical and Radiative Properties Derived from MODIS, VIRS, AVHRR, and GMS Data Over the Tropical Western Pacific
Cloud Microphysical and Radiative Properties Derived from MODIS, VIRS, AVHRR, and GMS Data Over the Tropical Western Pacific
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热带西太平洋地区 MODIS、VIRS、AVHRR 和 GMS 数据得出的云微物理和辐射特性
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
P. Minnis
中科院分区：
文献类型：
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作者：
G. Nowicki;M. Nordeen;P. Heck;D. Doelling;M. Khaiyer;P. Minnis
Utilization of the geostationary meteorological satellite (GMS) imagery has allowed for the derivation of cloud and radiative properties over the Tropical Western Pacific (TWP) on relatively high spatial and temporal scales. The layered bispectral threshold method (LBTM) has been applied to GMS data resulting in the ability to study variability and climatological features over a large domain at different spatial scales. The GMS imager only has four channels: visible (VIS; 0.65 μm), infrared (IR; 11-μm), split-window (12 μm), and water vapor (6.7 μm). Without the 3.9-μm channel available on other satellites, it is not possible to derive cloud particle size, water path, and phase accurately and it is difficult accurately determine the heights of optically thin clouds at night. This is an especially important feature over the TWP because thin cirrus clouds constitute a significant portion of the total cloud cover. While the current 3 years of GMS products (available online at http://wwwpm.larc.nasa.gov/arm/TWP/arm-twp.html and at the ARM Data Center) provide some valuable parameters such as cloud fraction, optical depth (OD), and height and outgoing shortwave (SW) and longwave (LW) fluxes, a more complete characterization of the cloud field is possible using additional spectral channels. Although the ninth Geostationary Operational Environmental Satellite-9 (GOES-9), which carries a 3.9-μm channel, became operational over the TWP during April 2003, there remain more than 4 years of Atmospheric Radiation Measurement (ARM) Program surface-based datasets complemented by only limited satellite data products. To increase the utility of the ARM TWP surface measurements and satellite products and better define the complete diurnal cycle of clouds and the radiation fields, the multi-spectral imager data on the National Oceanic and Atmospheric Administration (NOAA), Earth Observing System (EOS), and Tropical Rainfall Measuring Mission (TRMM) satellites can be analyzed to derive cloud ice and liquid particle sizes, ODs, and water paths as well as improved
