Investigation of vertical profile of rain microstructure at Ahmedabad in Indian tropical region

Das, Saurabh; Shukla, Ashish; Maitra, Animesh

doi:10.1016/j.asr.2010.01.001

Cited by 53 publications

(22 citation statements)

References 13 publications

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“…Peters et al () also illustrated that the height variability of the Z‐R relationship depended on the shape of the DSDs at high RRs over the Baltic Sea. Similar conclusions were also drawn in the tropical region of Ahmedabad (India) by Das, Maitra, & Shukla, ; Das, Shukla, & Maitra, ). All these studies focused their analyses on particular regions of interest.…”

Section: Introductionsupporting

confidence: 82%

Vertical Distributions of Raindrops and Z‐R Relationships Using Microrain Radar and 2‐D‐Video Distrometer Measurements During the Integrative Monsoon Frontal Rainfall Experiment (IMFRE)

Zhou

Dong

et al. 2020

JGR Atmospheres

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The vertical characteristics of raindrop size distributions (DSD) and Z-R relationships for monsoon frontal rainfall have been investigated using the co-located two-dimensional video disdrometer and micro rain radar at the Xianning surface site, and the S-band weather radar at the Wuhan radar site during the Integrative Monsoon Frontal Rainfall Experiment (IMFRE). In this study, a total of 1,896 rain samples (1-min resolution) were collected and classified into three categories of convective rain (CR), stratiform rain (SR), and light rain (LR), and their corresponding rain microphysical properties were explored. The LR category is dominated by the evaporation of smaller raindrops and the break-up processes of larger raindrops, resulting in decreasing trends in radar reflectivity and rain rate as the raindrops fall. The SR category undergoes a competition of break-up and coalescence processes, with weak increases in radar reflectivity and rain rate. Whereas, for the CR category, the coalescence process is dominant on the falling path of raindrops, especially below 1 km, leading to sharp increases in radar reflectivity and rain rate. The microrain radar data at height of 200 m is quantitatively compared with the two-dimensional video disdrometer data, and a good agreement is found between them. Further, the number concentrations of raindrops are negatively correlated with the diameters of raindrops and discrepant significantly at different heights among the three rain categories. The height-dependent Z-R relationships found for LR, SR, and CR categories will provide insightful information for improving radar rainfall estimate of monsoon frontal rainfall over central China in the future.Key Points:• The vertical distributions of rain parameters and Z-R relationships during 2018 monsoon season over central China were investigated • Different formation processes of raindrops for classified light rain, stratiform rain, and convective rain were revealed • The MRR retrieved rain parameters were validated using surface 2DVD measurementsCorrespondence to: X. Dong,

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Section: Introductionsupporting

confidence: 82%

Vertical Distributions of Raindrops and Z‐R Relationships Using Microrain Radar and 2‐D‐Video Distrometer Measurements During the Integrative Monsoon Frontal Rainfall Experiment (IMFRE)

Zhou

Dong

et al. 2020

JGR Atmospheres

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“…Using Gunn-Kinzer relation the DSD profile is obtained from the fall velocity profile. The vertical DSD profile, in turn, gives the rain rate and radar reflectivity factor, and hence is capable of indicating the presence of melting layer by a radar bright band signature (Fabry and Zawadzki, 1995;Das et al, 2010b). The bright band represents an abrupt enhancement in vertical radar reflectivity profile due to the change in dielectric properties of melting ice (Kain et al, 2000).…”

Section: Methodsmentioning

confidence: 98%

Effects of melting layer on Ku-band signal depolarization

Sarkar

Das

Maitra

2014

Journal of Atmospheric and Solar-Terrestrial Physics

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“…The rain type is identified by collocated micro rain radar (MRR), which is a vertical pointing frequency‐modulated continuous‐wave (FMCW) radar at 24.1 GHz and gives drop size distributions at different heights using the Doppler spectrum of radar signal backscattered from rain drops (Peters et al, ). From MRR reflectivity profiles, the rain type can be classified into convective, stratiform, or mixed type (Das et al, ; Rakshit & Maitra, ). The ground rain information is retrieved from an impact‐type disdrometer (Distromet RD‐80), which senses rain drop sizes from 0.3 to 5.5 mm in diameter with ±5% accuracy and 30‐s temporal resolution (Distromet, ).…”

Section: Instrumental Setup Database and Methodologymentioning

confidence: 99%

Electric Field Variation in Clear and Convective Conditions at a Tropical Urban Location

Jana

Maitra

2019

JGR Atmospheres

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The behavior of atmospheric electric field in terms of potential gradient (PG) has been studied during the period of 2013 and 2014 at a tropical and urban location Kolkata (22°34′N, 88°22′E), India. The clear‐weather PG is influenced by varying concentration of black carbon, which is a major pollutant in urban atmosphere. The diurnal variation of the clear‐day PG follows that of the black carbon concentration in all the seasons. It is found that cloud base height and liquid water path correlate well with the PG change in convective events. It is shown that during a convective event the PG change measured over 10‐min interval about 30 min before the onset of rain can approximate impending rain accumulation.

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Investigation of vertical profile of rain microstructure at Ahmedabad in Indian tropical region

Cited by 53 publications

References 13 publications

Vertical Distributions of Raindrops and Z‐R Relationships Using Microrain Radar and 2‐D‐Video Distrometer Measurements During the Integrative Monsoon Frontal Rainfall Experiment (IMFRE)

Vertical Distributions of Raindrops and Z‐R Relationships Using Microrain Radar and 2‐D‐Video Distrometer Measurements During the Integrative Monsoon Frontal Rainfall Experiment (IMFRE)

Effects of melting layer on Ku-band signal depolarization

Electric Field Variation in Clear and Convective Conditions at a Tropical Urban Location

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