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This paper describes the Swedish activities to support calibration and validation of the Japanese satellite ALOS. Data over three test sites from the instruments PALSAR and AVNIR-2 will be provided by JAXA for evaluation purposes. The main activity during 2006 is a PALSAR calibration experiment using four 5-m radar reflectors, which will be deployed at the test site in southern Sweden. The ALOS data...
This study is concerned with the quantitative prediction of dust storms in China. Some dust storms were observed in China for the period of 1-5 May 2005. These dust events have been simulated using an integrated wind erosion modeling system (IWEMS) which simulates all stages of dust cycle, from dust emission and transport to deposition. WMO 3 hourly synoptic reporting data for six spring seasons (March-...
The paper investigates the multiple time scale features of the annual frequency of tropical cyclones (TC) affecting Fujian and the air - sea background in abnormal TC frequency years in 1884~2003, leading to the conclusions as follows: (1) The province experiences two (three) stages of more (fewer) TC hitting, with the turning years being 1902,1931, 1955 and 1971, and the last in particular serves...
The implications of climatic effects due to aerosols with a large variability like mineral dust serve as indicators of dust events and are examined. Airborne mineral dust can influence the climate by altering the radiative properties of the atmosphere. For instance, aerosols in the form of dust particles reflect the incoming solar radiation to space, thereby reducing the amount of radiation available...
The main concerns of this paper are the effects of sub- grid convection and wet deposition on dust distribution in the atmosphere. A theoretic framework and a numerical scheme are developed for parameterization of convective dust transport. A new parameterization scheme for wet deposition arising from below cloud scavenging is also developed. The new convective dust transport scheme and wet deposition...
The first testbed of X-band radar systems deployed by the Center for Collaborative Adaptive Sensing of the Atmosphere (CASA), in central Oklahoma called IP-1 (Integrated Project 1) will have a low unambiguous velocity due to their short wavelength, and increasing the PRF will result in multiple trip overlays since storms can extend over a large distance. The range-velocity ambiguity is more severe...
During the past decade, the ability to determine detailed information of ocean surface wind from Synthetic Aperture Radar (SAR) has been generally accepted. It is expected that SAR will provide all-day and all-weather wind parameters with high spatial resolution and high accuracy, which would provide valuable data to marine weather forecasters and SAR model designers. However, the methodology for...
Dust storms greatly affect the environment and the resources in arid and semi-arid areas. In this paper, we study the process of an Asian dust storm in the north of China in 2005 by means of Terra and Aqua MODIS data, which could monitor dust storms both in daytime and nighttime. We use three thermal infrared (TIR), 8.5 mum, 11 mum, and 12 mum, and a tri-spectral technique presented by Ackerman (1997)...
Precipitation radar (PR) on Tropical Rainfall Measuring Mission (TRMM) satellite provides high resolution vertical profile of reflectivity (VPR) of tropical storms. Three- dimensional downward-looking observations of tropical storms are very useful to study Hurricanes and Typhoons. The increased reflectivity measured in bright band (BB) region can lead to rainfall overestimate. It is also known that...
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