Libar observation of the stratospheric aerosols at two different wavelength, 0.6943 μm and 1.06μm

Iwasaka, Y.; Isono, K.

doi:10.1016/0021-9169(77)90052-6

Cited by 15 publications

(6 citation statements)

References 9 publications

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“…The laser radar measurements began on the night of April 14, 1979, at Nagoya when the fall-out of sand was greatest. The main characteristics of the laser radar have been described in other papers (e.g., Iwasaka et al, 1976;Iwasaka and Isono, 1977). This laser radar emits a laser pulse of wavelength = 0.6943 pm at a maximum power of 1.0 J and a pulse repetition rate of 0.2 s-l.…”

Section: Dust Storm Of April 1979 Measured By Laser Radar and By Satementioning

confidence: 94%

The transport and spacial scale of Asian dust-storm clouds: a case study of the dust-storm event of April 1979

Iwasaka

Minoura

Nagaya

1983

Tellus B: Chemical and Physical Meteorology

138

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A dust storm which originated in the China desert area covered the Japan Islands on April 14-15, 1979. Simultaneous measurement by lidar and geosynchronous meteorological satellite enabled the spacial structure and transport path of the dust storm cloud to be characterized. The horizontal scale of the dust cloud was about 1.36 x 106 kmz, and the total dust particle mass load was at least -1.63 x lo6 tor1/1.36 x lo6 km2. The lidar measurements indicated that the dust cloud consisted of 2 distinct layers, one at 6 km height and the other at 2 km. The trajectory analysis of air mass suggests that the particulate matter contained in the upper layer is probably transported from the Takla-Makan desert and that in the lower layer from the Gobi desert and the Huang-Ho basin.

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Section: Dust Storm Of April 1979 Measured By Laser Radar and By Satementioning

confidence: 94%

The transport and spacial scale of Asian dust-storm clouds: a case study of the dust-storm event of April 1979

Iwasaka

Minoura

Nagaya

1983

Tellus B: Chemical and Physical Meteorology

138

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“…In Table 1, we listed values of parameter r which are decided by the analytical procedure of IWASAKA and ISONO (1977) on assumption that the size distribution function are described as the power law type of aerosol radius R, n(R)=AR-r in the radius range from 0.1 to 1.0um, and compared with the measurements by MIRANDA and FENN (1974). The parameter r becomes minimum in the region from 18 to 21km, and it is corresponding to the fact that this region contains relatively more the larger size particles.…”

Section: Curves Inmentioning

confidence: 99%

“…The results described here are due to measurements at Nagoya, Japan (35oN, 137oE) during winter, January-March 1977, using two-color laser radar system which has an advantage point that this can emit laser pulse at two different wavelengths, 0.6943um (Ruby laser) and 1.06um (YAG laser) by turns, maximum repetition rate is 0.2/sec. The detail and discussion for the determination of size distribution function of stratospheric aerosol by two-color laser radar technique has been already described in other papers (IWASAKA, 1977;IWASAKA and ISONO, 1977), then we will not repeat it here.…”

mentioning

confidence: 99%

The Vertical Change of Stratospheric Aerosol Size Measured by Two-Color Laser Radar Technique

Iwasaka

1980

J. geomagn. geoelec

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“…1, and details on the characteristics have been already described on other paper (Iwasaka, Mita and Isono, 1976).…”

Section: Introductionmentioning

confidence: 99%

“…The size distribution is assumed to be the power-law type presented by Junge (1963), n(R)=AR-* (Iwasaka and Isono, 1977). On the other hand it can be easy to estimate the backscattering coefficient of particulate matter without the normalizing procedure if the system constant of lidar, C in equation (1), has already been determined.…”

Section: Introductionmentioning

confidence: 99%

Lidar and Airborne Particle Counter Measurements of Aerosol Size Distribution in the Lower Atmosphere; a Comparison

Iwasaka¹,

Nagaya²,

Okada³

et al. 1982

Journal of the Meteorological Society of Japan

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The size distribution function of aerosols in the lower atmosphere (*0km *2km) measured by the two-wavelength lidar technique is compared with the results determined by an airborne optical particle counter. The comparison shows following facts,1) The vertical changes of size distribution functions determined by the lidar technique show good agreements with the results of the airborne particle counter in a qualitative sense.2) The parameter of * in the size distribution function for aerosol radius R, n(R)= AR-* can be fully accurately determined by the lidar measurements, but the estimation of the other parameter A contains some uncertainty.The remote sensing technique for the size distribution, function should contribute to the study of aerosol growth process, aerosol transformation process, aerosol transport process due to air motion in lower atmosphere, and so on.

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Libar observation of the stratospheric aerosols at two different wavelength, 0.6943 μm and 1.06μm

Cited by 15 publications

References 9 publications

The transport and spacial scale of Asian dust-storm clouds: a case study of the dust-storm event of April 1979

The transport and spacial scale of Asian dust-storm clouds: a case study of the dust-storm event of April 1979

The Vertical Change of Stratospheric Aerosol Size Measured by Two-Color Laser Radar Technique

Lidar and Airborne Particle Counter Measurements of Aerosol Size Distribution in the Lower Atmosphere; a Comparison

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