Correcting Propagation Effects in C-Band Polarimetric Radar Observations of Tropical Convection Using Differential Propagation Phase

Carey, Lawrence D.; Rutledge, Steven A.; Ahijevych, David; Keenan, T. D.

doi:10.1175/1520-0450(2000)039<1405:cpeicb>2.0.co;2

Cited by 125 publications

(161 citation statements)

References 53 publications

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“…The best-fit power law is also shown. The linearity is excellent; however, the multiplicative coefficient of 0.056 dB per degree is on the lower end of what has been quoted in the literature as summarized by Carey et al (2000), that range being 0.05-0.1 dB per degree. Figure 7b shows similar scatter plot, and the best-fit power law for A dp versus K dp .…”

Section: Overview Of 2d-video Disdrometer Measurementsmentioning

confidence: 64%

“…Figure 7b shows similar scatter plot, and the best-fit power law for A dp versus K dp . The non-linearity is moderate and several past studies have assumed a linear relation between A dp and K dp (e.g., Bringi et al 1990;Carey et al 2000); for comparison the temperatureaveraged best-fit power law from Jameson (1992) is 0:013K 1:23 dp . Note that Jameson's multiplicative coefficient is a factor of two larger than for our simulations, which is due to his assumption of the more oblate Pruppacher and Beard axis ratio fit (b/a ¼ 1:03 À 0:062D).…”

Section: Overview Of 2d-video Disdrometer Measurementsmentioning

confidence: 99%

“…The wide use of C-band for weather radars, especially in Europe and Japan, and the potential upgrade for dual-polarization technology implies a continuing need for validating radar polarimetricbased attenuation-correction procedures, as well as retrieval techniques especially for estimating the rainfall microphysical parameters, such as the (mass-weighted) mean drop diameter and the rain rate in different rain climatologies and regimes. Past research using dual-polarized C-band radars are described in Meischner et al (1991) in southern Germany, Gorgucci et al (1996) in Italy, and more comprehensively in Darwin, Australia (by May et al 1999;Carey et al 2000;and Bringi et al 2001b).…”

Section: Introductionmentioning

confidence: 99%

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Rainfall Estimation from C-Band Polarimetric Radar in Okinawa, Japan: Comparisons with 2D-Video Disdrometer and 400 MHz Wind Profiler

Bringi

Thurai

Nakagawa

et al. 2006

Journal of the Meteorological Society of Japan

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This paper presents an inter-comparison of rainfall parameters (median volume diameter and rain rate) using C-band polarimetric radar, a 2D-video disdrometer and a 400 MHz profiler for the Baiu front event of 8-9 June 2005 in Okinawa, Japan. These instruments are part of the Okinawa Sub-Tropical Environment Remote Sensing Center, operated by the National Institute of Information and Communications Technology (NICT). The 2D-video disdrometer is used to derive the mean axis ratio of raindrops versus drop diameter, as well as the drop size distribution for the Baiu event. The data are then used to simulate various relations between polarimetric scattering parameters such as: specific attenuation ðA h Þ, and specific differential attenuation ðA dp Þ, versus specific differential phase ðK dp Þ which are required to correct the measured reflectivity at horizontal polarization ðZ h Þ, and the differential reflectivity ðZ dr Þ for rain attenuation. The 2D-video disdrometer data are also used to arrive at retrieval formulas for median volume diameter ðD o Þ from radar Z dr , and rain rate from radar K dp .The These inter-comparisons demonstrate the accuracy of C-band polarimetric radar to retrieve important rainfall parameters, as well as the accurate correction for rain attenuation using differential propagation phase.

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Section: Overview Of 2d-video Disdrometer Measurementsmentioning

confidence: 64%

Section: Overview Of 2d-video Disdrometer Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Rainfall Estimation from C-Band Polarimetric Radar in Okinawa, Japan: Comparisons with 2D-Video Disdrometer and 400 MHz Wind Profiler

Bringi

Thurai

Nakagawa

et al. 2006

Journal of the Meteorological Society of Japan

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“…K DP is insensitive to both calibration and attenuation effects, although estimation of K DP becomes complicated when backscatter differential phase is significant, as it is for particles that are large with respect to the radar wavelength (Aydin and Giridhar 1992;Carey et al 2000;Giangrande et al 2013), and K DP may also be susceptible to cross-coupling effects (Hubbert et al 2014). …”

Section: Introduction a Motivationmentioning

confidence: 99%

On Polarimetric Radar Signatures of Deep Convection for Model Evaluation: Columns of Specific Differential Phase Observed during MC3E*

Lier-Walqui

Fridlind

Ackerman

et al. 2016

Monthly Weather Review

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The representation of deep convection in general circulation models is in part informed by cloudresolving models (CRMs) that function at higher spatial and temporal resolution; however, recent studies have shown that CRMs often fail at capturing the details of deep convection updrafts. With the goal of providing constraint on CRM simulation of deep convection updrafts, ground-based remote-sensing observations are analyzed and statistically correlated for four deep convection

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“…On the other hand, the coefficient varies widely with temperature and drop shape. According to the scattering simulations under various temperatures and drop shapes, the coefficient varies from about 0.05 to 0.11 dB( ∘ ) −1 at C-band [20] and from 0.139 to 0.335 dB( ∘ ) −1 at X-band [6]. So, a fixed value of may Retrieve the mean speci c measurements.…”

Section: Methodsmentioning

confidence: 99%

Attenuation Correction of Weather Radar Reflectivity with Arbitrary Oriented Microwave Link

Zhang

Liu

et al. 2017

Advances in Meteorology

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To compensate radar reflectivity for attenuation effect, a new method for attenuation correction of the radar reflectivity using arbitrary oriented microwave link (referred henceforth to as ACML) is developed and evaluated. Referring to the measurement of arbitrary oriented microwave link, the ACML method optimizes the ratio of specific attenuation to specific differential phase which is a key parameter in attenuation correction schemes. The proposed method was evaluated using real data of a dual-polarization X-band radar and measurements of two microwave links during two rainstorm events. The results showed that the variation range of the optimized ratio was overall consistent with the results of the previous studies. After attenuation correction with the optimal ratios, the radar reflectivity was significantly compensated, especially at long distances. The corrected reflectivity was more intense than the reflectivity corrected by the "self-consistent" (SC) method and closer to the reflectivity of a nearby S-band radar. The effectiveness of the method was also verified by comparing the rain rates estimated by the X-band radar with those derived by rain gauges. It is demonstrated that arbitrary oriented microwave link can be adopted to optimize the attenuation correction of radar reflectivity.

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Correcting Propagation Effects in C-Band Polarimetric Radar Observations of Tropical Convection Using Differential Propagation Phase

Cited by 125 publications

References 53 publications

Rainfall Estimation from C-Band Polarimetric Radar in Okinawa, Japan: Comparisons with 2D-Video Disdrometer and 400 MHz Wind Profiler

Rainfall Estimation from C-Band Polarimetric Radar in Okinawa, Japan: Comparisons with 2D-Video Disdrometer and 400 MHz Wind Profiler

On Polarimetric Radar Signatures of Deep Convection for Model Evaluation: Columns of Specific Differential Phase Observed during MC3E*

Attenuation Correction of Weather Radar Reflectivity with Arbitrary Oriented Microwave Link

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