<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0187-6236</journal-id>
<journal-title><![CDATA[Atmósfera]]></journal-title>
<abbrev-journal-title><![CDATA[Atmósfera]]></abbrev-journal-title>
<issn>0187-6236</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Ciencias de la Atmósfera y Cambio Climático]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-62362025000100018</article-id>
<article-id pub-id-type="doi">10.20937/atm.53446</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[New experimental device for measuring electrical charge of precipitation particles]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pereyra]]></surname>
<given-names><![CDATA[Rodolfo Guillermo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez]]></surname>
<given-names><![CDATA[Lucía Belén]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ávila]]></surname>
<given-names><![CDATA[Eldo Edgardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional de Córdoba (UNC) Facultad de Matemática, Astronomía, Física y Computación (FAMAF) ]]></institution>
<addr-line><![CDATA[Córdoba ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto de Física Enrique Gaviola (IFEG)  ]]></institution>
<addr-line><![CDATA[Córdoba ]]></addr-line>
<country>Argentina</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<volume>39</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-62362025000100018&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-62362025000100018&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-62362025000100018&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT A new approach is presented in this work to measure the electrical charge carried by precipitation particles and their corresponding fall velocity. The instrument represents an improved version of our previous device, with the primary goal of increasing the sampling rate of charged droplets to improve and make the statistical analysis of charged raindrops more robust. Additionally, the instrument incorporates a computational program for detecting individual raindrop passages, enabling automatic calculation of its electrical charge and fall velocity. To test the new device&#8217;s performance, it was simultaneously used with our previous instrument during a storm in Córdoba on November 21, 2023. It was observed that the latest instrument increased the sampling rate nearly fivefold compared to the old one. The results demonstrate a high degree of consistency across different devices, validating the reliability and reproducibility of the new device.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN En este trabajo se presenta el nuevo diseño de un dispositivo para medir la carga eléctrica transportada por las partículas de precipitación y su correspondiente velocidad de caída. El instrumento representa una versión mejorada del anterior, con el objetivo principal de aumentar la tasa de muestreo de gotas cargadas, y mejorar y robustecer el análisis estadístico de las gotas de lluvia cargadas. Además, el instrumento incorpora un programa computacional para la detección de pasajes individuales de gotas de lluvia, lo que permite el cálculo automático tanto de la carga eléctrica como de la velocidad de caída de cada gota de lluvia. Para probar el rendimiento del nuevo dispositivo, se utilizó simultáneamente con el instrumento original durante una tormenta en Córdoba el 21 de noviembre de 2023. Se observó que el nuevo instrumento aumentó la tasa de muestreo casi cinco veces en comparación con el anterior. Los resultados muestran un alto grado de consistencia entre los diferentes dispositivos y validan la fiabilidad y reproducibilidad del nuevo aparato.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[thunderstorms]]></kwd>
<kwd lng="en"><![CDATA[electrical charge measurements]]></kwd>
<kwd lng="en"><![CDATA[charged raindrops]]></kwd>
<kwd lng="en"><![CDATA[size of raindrops]]></kwd>
<kwd lng="en"><![CDATA[Córdoba storm]]></kwd>
<kwd lng="en"><![CDATA[fall velocity]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ávila]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Caranti]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Castellano]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Saunders]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Laboratory studies of the influence of cloud droplet size on charge transfer during crystal-graupel collisions]]></article-title>
<source><![CDATA[Journal of Geophysical Research: Atmospheres]]></source>
<year>1998</year>
<volume>103</volume>
<page-range>8985-96</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ávila]]></surname>
<given-names><![CDATA[EA]]></given-names>
</name>
<name>
<surname><![CDATA[Pereyra]]></surname>
<given-names><![CDATA[RG]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Charge transfer during crystal-graupel collisions for two different cloud droplet size distributions]]></article-title>
<source><![CDATA[Geophysical Research Letters]]></source>
<year>2000</year>
<volume>27</volume>
<page-range>3837-40</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ávila]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Pereyra]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Lang]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Deierling]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Wingo]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Melo]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Medina]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Measurements of size and electrical charges carried by precipitation particles during RELAMPAGO field campaign]]></article-title>
<source><![CDATA[Earth and Space Science]]></source>
<year>2022</year>
<volume>9</volume>
</nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bateman]]></surname>
<given-names><![CDATA[MG]]></given-names>
</name>
<name>
<surname><![CDATA[Marshall]]></surname>
<given-names><![CDATA[TC]]></given-names>
</name>
<name>
<surname><![CDATA[Stolzenburg]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Rust]]></surname>
<given-names><![CDATA[WD]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Precipitation charge and size measurements inside a New Mexico mountain thunderstorm]]></article-title>
<source><![CDATA[Journal of Geophysical Research Atmospheres]]></source>
<year>1999</year>
<volume>104</volume>
<page-range>9643-53</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Beard]]></surname>
<given-names><![CDATA[KV]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Terminal velocity and shape of cloud and precipitation drops aloft]]></article-title>
<source><![CDATA[Journal of the Atmospheric Sciences]]></source>
<year>1976</year>
<volume>33</volume>
<page-range>851-64</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chauzy]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Despiau]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Rainfall rate and electric charge and size of raindrops of six spring showers]]></article-title>
<source><![CDATA[Journal of the Atmospheric Sciences]]></source>
<year>1980</year>
<volume>37</volume>
<page-range>1619-27</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Despiau]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Houngninou]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Raindrop charge, precipitation, and Maxwell currents under tropical storms and showers]]></article-title>
<source><![CDATA[Journal of Geophysical Research Atmospheres]]></source>
<year>1996</year>
<volume>101</volume>
<page-range>14991-7</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gschwend]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Beobachtungen über die elektrischen Ladungen einzelner Regentropfen und Schneeflocke]]></article-title>
<source><![CDATA[Jahrbuch der Radioaktivität und Elektronik]]></source>
<year>1921</year>
<volume>17</volume>
<page-range>62-79</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gunn]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Kinzer]]></surname>
<given-names><![CDATA[GD]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The terminal velocity of fall for water droplets in stagnant air]]></article-title>
<source><![CDATA[Journal of the Atmospheric Sciences]]></source>
<year>1949</year>
<volume>6</volume>
<page-range>243-8</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gunn]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The free electrical charge on precipitation inside an active thunderstorm]]></article-title>
<source><![CDATA[Journal of Geophysical Research (1896-1977)]]></source>
<year>1950</year>
<volume>55</volume>
<page-range>171-8</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gunn]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Devin]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Raindrop charge and electric field in active thunderstorms]]></article-title>
<source><![CDATA[Journal of the Atmospheric Sciences]]></source>
<year>1953</year>
<volume>10</volume>
<page-range>279-84</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Harrison]]></surname>
<given-names><![CDATA[RG]]></given-names>
</name>
<name>
<surname><![CDATA[Nicoll]]></surname>
<given-names><![CDATA[KA]]></given-names>
</name>
<name>
<surname><![CDATA[Ambaum]]></surname>
<given-names><![CDATA[MHP]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[On the microphysical effects of observed cloud edge charging]]></article-title>
<source><![CDATA[Quarterly Journal of the Royal Meteorological Society]]></source>
<year>2015</year>
<volume>141</volume>
<page-range>2690-9</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Khain]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Arkhipov]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Pinsky]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Feldman]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Ryabov]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Rain enhancement and fog elimination by seeding with charged droplets. Part I: Theory and numerical simulations]]></article-title>
<source><![CDATA[Journal of Applied Meteorology and Climatology]]></source>
<year>2004</year>
<volume>43</volume>
<page-range>1513-29</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[MacGorman]]></surname>
<given-names><![CDATA[DR]]></given-names>
</name>
<name>
<surname><![CDATA[Rust]]></surname>
<given-names><![CDATA[WD]]></given-names>
</name>
</person-group>
<source><![CDATA[The electrical nature of storms]]></source>
<year>1998</year>
<publisher-name><![CDATA[Oxford University Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Marshall]]></surname>
<given-names><![CDATA[TC]]></given-names>
</name>
<name>
<surname><![CDATA[Stolzenburg]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Estimates of cloud charge densities in thunderstorms]]></article-title>
<source><![CDATA[Journal of Geophysical Research Atmospheres]]></source>
<year>1998</year>
<volume>103</volume>
<page-range>19769-75</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Medina]]></surname>
<given-names><![CDATA[BL]]></given-names>
</name>
<name>
<surname><![CDATA[Carey]]></surname>
<given-names><![CDATA[LD]]></given-names>
</name>
<name>
<surname><![CDATA[Lang]]></surname>
<given-names><![CDATA[TJ]]></given-names>
</name>
<name>
<surname><![CDATA[Bitzer]]></surname>
<given-names><![CDATA[PM]]></given-names>
</name>
<name>
<surname><![CDATA[Deierling]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Zhu]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Characterizing charge structure in central Argentina thunderstorms during RELAMPAGO utilizing a new charge layer polarity identification method]]></article-title>
<source><![CDATA[Earth and Space Science]]></source>
<year>2021</year>
<volume>8</volume>
</nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mo]]></surname>
<given-names><![CDATA[Q]]></given-names>
</name>
<name>
<surname><![CDATA[Detwiler]]></surname>
<given-names><![CDATA[AG]]></given-names>
</name>
<name>
<surname><![CDATA[Helsdon]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Winn]]></surname>
<given-names><![CDATA[WP]]></given-names>
</name>
<name>
<surname><![CDATA[Aulich]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Murray]]></surname>
<given-names><![CDATA[WC]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Hydrometeor charges observed below an electrified cloud using a new instrument]]></article-title>
<source><![CDATA[Journal of Geophysical Research: Atmospheres]]></source>
<year>2007</year>
<volume>112</volume>
<page-range>D13207</page-range></nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pawar]]></surname>
<given-names><![CDATA[SD]]></given-names>
</name>
<name>
<surname><![CDATA[Kamra]]></surname>
<given-names><![CDATA[AK]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[End-of-storm oscillation in tropical air mass thunderstorms]]></article-title>
<source><![CDATA[Journal of Geophysical Research Atmospheres]]></source>
<year>2007</year>
<volume>112</volume>
<page-range>D03204</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pereyra]]></surname>
<given-names><![CDATA[RG]]></given-names>
</name>
<name>
<surname><![CDATA[Ávila]]></surname>
<given-names><![CDATA[EE]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Charge transfer measurements during single ice crystal collisions with a target growing by riming]]></article-title>
<source><![CDATA[Journal of Geophysical Research: Atmospheres]]></source>
<year>2002</year>
<volume>107</volume>
<page-range>AAC 23-1-AAC 23-9</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Reynolds]]></surname>
<given-names><![CDATA[SE]]></given-names>
</name>
<name>
<surname><![CDATA[Brook]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Gourley]]></surname>
<given-names><![CDATA[MF]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Thunderstorm charge separation]]></article-title>
<source><![CDATA[Journal of the Atmospheric Sciences]]></source>
<year>1957</year>
<volume>14</volume>
<page-range>426-36</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Saunders]]></surname>
<given-names><![CDATA[CPR]]></given-names>
</name>
<name>
<surname><![CDATA[Peck]]></surname>
<given-names><![CDATA[SL]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Laboratory studies of the influence of the rime accretion rate on charge transfer during crystal/graupel collisions]]></article-title>
<source><![CDATA[Journal of Geophysical Research: Atmospheres]]></source>
<year>1998</year>
<volume>103</volume>
<page-range>13949-56</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Takahashi]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Riming electrification as a charge generation mechanism in thunderstorms]]></article-title>
<source><![CDATA[Journal of the Atmospheric Sciences]]></source>
<year>1978</year>
<volume>35</volume>
<page-range>1536-48</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Weinheimer]]></surname>
<given-names><![CDATA[AJ]]></given-names>
</name>
<name>
<surname><![CDATA[Dye]]></surname>
<given-names><![CDATA[JE]]></given-names>
</name>
<name>
<surname><![CDATA[Breed]]></surname>
<given-names><![CDATA[DW]]></given-names>
</name>
<name>
<surname><![CDATA[Spowart]]></surname>
<given-names><![CDATA[MP]]></given-names>
</name>
<name>
<surname><![CDATA[Parrish]]></surname>
<given-names><![CDATA[JL]]></given-names>
</name>
<name>
<surname><![CDATA[Hoglin]]></surname>
<given-names><![CDATA[TL]]></given-names>
</name>
<name>
<surname><![CDATA[Marshall]]></surname>
<given-names><![CDATA[TC]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Simultaneous measurements of the charge, size, and shape of hydrometeors in an electrified cloud]]></article-title>
<source><![CDATA[Journal of Geophysical Research Atmospheres]]></source>
<year>1991</year>
<volume>96</volume>
<page-range>20809-29</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
