Functional fits to some observed drop size distributions …
The resultant drop size distributions are normalized and their shape is found to exhibit some curvature-departure from exponentiality. ... @article{Willis1984FunctionalFT, title={Functional fits to some observed drop size distributions and parameterization of rain}, author={Paul T. Willis}, journal={Journal of the Atmospheric Sciences}, year ...
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Seasonal variations in precipitation microphysics over
The disdrometer-observed raindrop size distribution (DSD) in East China has been shown to vary across seasons and rainfall types. In this study, as an extensive research, the seasonal variations of vertical structures and associated microphysical processes of precipitation were investigated using nine-year measurements of dual …
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Evaluation of Particle Size Distribution Metrics to …
The shape of the particle size distribution (PSD) is commonly modeled as a single‐slope power law in oceanographic studies, which can be used to further estimate …
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Characteristics of the Raindrop Size Distribution in Tropical
The observed drop size distributions are normalized to remove the effect of differences in rainfall rate. Gamma distributions then are least squares fitted to the normalized DSD data to show distinct differences between the convective-center and the stratiform regions; the characteristics of the trailing-edge and reflectivity-trough regions …
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Altitudinal and temporal evolution of raindrop size distribution
Rain drop size distribution (DSD) measurements at different heights were made using a micro rain radar (MRR) at Thiruvananthapuram (latitude: 8.3° N, longitude: 76.9° E). Rain DSD data obtained from the MRR have been compared with a Joss–Waldvogel impact-type disdrometer (RD-80) deployed nearby and found to have good agreement.
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Evolution of particle concentration and size …
Modifications of the number size distributions between 60 and 300 nm particle diameter that are attributed to cloud processing were observed comparing upwind and …
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Aerosol size distributions observed at Naiman in the Asian …
Aerosol size distributions of observed mass concentrations at the Naiman site in Inner Mongolia that is one of the major Asian dust source regions have been examined for the period from April 2010 to July 2012. The total number of 262 sampled data using the 10-stage quartz crystal microbalance (QCM) cascade impactor is obtained by …
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Variations in raindrop size distributions observed in mid …
The temporal variations in raindrop size distributions (RSDs) observed during the East-Asian summer monsoon have been considered for the statistical procedure called the principal component analysis (PCA). This statistical examination reveals the most important factors in the RSD's variations and helps to critically re-evaluate the known …
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Variability in Oceanic Particle Size Distributions and …
Plain Language Summary The particle size distribution (PSD) describes how the concentration of particles changes with particle size, and it is an important characteristic of suspended oceanic ...
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Statistical characteristics of raindrop size distributions …
The equivalent-volume diameters are sorted into size categories of 0.2mm. The range in tabulated raindrop diameters is 0.1–8.1mm (41 bins), and the velocity bin is changed to match the size bin. Vi is obtained by averaging measured particle velocities within that size bin. N(Di)(mm 1 m 3) represents the number concentration of drops with ...
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Observed changes in sea-ice floe size distribution during …
The size distribution of ice floes in the Antarctic sea-ice zone is an important parameter that affects both thermodynamic and dynamic sea-ice processes. ... The change in ice-floe size distribution observed in this study can be attributed to divergence and melt processes weakening the structure of ridges. The results show an important …
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Characteristics of the raindrop size distribution …
[26] In this study, the microphysical characteristics of drop size distributions during a severe hazardous freezing precipitation event were investigated using the PARSIVEL disdrometer data observed in …
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Aerosol size distributions observed at the Seoul …
Abstract. Aerosol size distributions of observed mass concentration and number concentration at the Seoul National University (SNU) campus site in Korea …
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The shape-slope relation in observed gamma raindrop size distributions
The three-parameter gamma distribution n( D) 5 N0Dmu exp(-LambdaD) is often used to characterize a raindrop size distribution ( DSD). The parameters m and L correspond to the shape and slope of the DSD. If mu and Lambda are related to one another, as recent disdrometer measurements suggest, the g...
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Mysterious gap in size distribution of super-earths …
Summary: Astronomers have uncovered evidence of how the enigmatic gap in the size distribution of exoplanets at around two Earth radii emerges. Their computer simulations demonstrate that the...
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Statistical Characteristics of Raindrop Size Distributions …
The rain parameters derived from the laser OTT second-generation Particle Size Velocity (Parsivel 2), the two-dimensional video disdrometer (2DVD), and DZZ5 tipping-bucket rain gauge (RG) during the Integrative Monsoon Frontal Rainfall Experiment (IMFRE) in summer 2018 are compared.The total rainfall amounts observed by Parsivel, …
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Size Distributions
Particle size influences a myriad of processes relevant to the distribution and reactivity of NMs in environmental and biological systems. 3 Size influences the solubility …
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Statistical Characteristics of Raindrop Size Distributions and
Statistical characteristics of raindrop size distribution in the Meiyu season observed in eastern China. Journal of the Meteorological Society of Japan Series II, 91 (2), 215 – 227. https://doi ...
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Remote Sensing | Free Full-Text | Particle Size Distribution …
Because measuring individual particle size remains challenging, the particle size distribution function (PSD) can be used to count particle size frequency in given size classes . The PSD can affect the scattering properties of polydispersion in seawater once a specific size range (lower and upper size) is chosen [ 12, 13 ].
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Aerosol size distributions observed at the Seoul National …
The particle size distribution of the observed mass concentration during the Asian dust period at the SNU site is compared with that observed at the Asian dust source site of Duolun in Inner Mongolia, China. The results indicate that the size distribution of both the mass concentration and the number concentration shows a bi-modal …
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Observed and Bin Model Simulated Evolution of Drop Size Distributions
Comparison of observed (red lines) and modeled (black lines) DSDs from one realization of the CONTROL simulation. Each black line corresponds to an individual droplet size distribution in a model grid volume and includes all grids within 0.5°C of the indicated temperature leg with L c ≥ 0.1 g m −3. Green lines show median values from …
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Lightning and precipitation: The possible electrical …
The raindrop size distribution (RDSDs) corresponding to the lightning discharges with different discharge strength (magnitude of change of surface electric field, ΔE) observed over the AEO, Pune. The four reported thunderstorms were observed on 22 May, 3–4 June, 2 and 9 September 2008.
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Analysis of the microstructure and morphology of
Fig. 2 (A) reveals that such a classification is effective as three distinct peaks of particle size distribution can be observed in A1, A2, and A3 curves. A1 displays the smallest particle size, with an equivalent average sphere diameter of around 300 nm. This value is higher than that of the pores of the filter membrane used in the separation ...
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Normal Distribution | Examples, Formulas, & Uses
Empirical rule. The empirical rule, or the 68-95-99.7 rule, tells you where most of your values lie in a normal distribution:. Around 68% of values are within 1 standard deviation from the mean. Around 95% of values are within 2 …
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Size distribution of observed [IMAGE] | EurekAlert!
Science News Releases. Size distribution of observed and simulated exoplanets with radii smaller than five Earth radii (IMAGE) Max Planck Institute for Astronomy. Caption. The …
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The Shape–Slope Relation in Observed Gamma Raindrop Size Distributions …
Abstract The three-parameter gamma distribution n(D) = N0Dµ exp(–ΛD) is often used to characterize a raindrop size distribution (DSD). The parameters µ and Λ correspond to the shape and slope of the DSD. If µ and Λ are related to one another, as recent disdrometer measurements suggest, the gamma DSD model is simplified, which …
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Chemical composition and size distributions of coastal aerosols
A typical bimodal mass-size distribution was observed, with the major peak from 0.36 µm to 0.56 µm and the minor one from 3.6 µm to 5.6 µm in diameters. Different individual components showed different mass-size distributions.
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Drop size distribution observed by dual-frequency …
This study investigated the drop size distribution (DSD) observed by the Dual-frequency Precipitation Radar (DPR) onboard the Global Precipitation Measurement (GPM) core satellite, which makes the world's first dual-frequency preciptation observations by space-borne radar. Four years have passed since the launch of the GPM core satellite, and ...
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Quantification of Observed Electrical Effect on the Raindrop Size …
Composite raindrop size distribution (six events in each composite) at selected altitudes for strongly electrified and weakly electrified clouds as observed by MRR at (a) 2,400 m, (b) 1,200 m, (c) 600 m, and (d) at surface observed by JW disdrometer.
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Characteristics of Raindrop Size Distributions in …
developed to study the particle size distribution in favor of formulating the microphysical processes that are dif-ficult to obtain directly from in situ observations (Morrison et al., 2020). ... Characteristics of raindrop size distributions in Chongqing observed by a dense network of disdrometers. Journal of Geophysical Research: Atmospheres ...
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