<?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>1026-8774</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias geológicas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. cienc. geol]]></abbrev-journal-title>
<issn>1026-8774</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Geología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1026-87742020000100001</article-id>
<article-id pub-id-type="doi">10.22201/cgeo.20072902e.2020.1.1101</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Chemical composition of rainwater collected from 2006 to 2009 in Mexico City and at a rural site in Morelos State, south central Mexico]]></article-title>
<article-title xml:lang="es"><![CDATA[Composición química de agua de lluvia colectada de 2006 a 2009 en la Ciudad de México y en un sitio rural del Estado de Morelos, sur-centro de México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Martínez]]></surname>
<given-names><![CDATA[Rocío]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carrillo-Chávez]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torres-Jardón]]></surname>
<given-names><![CDATA[Ricardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez-Guzmán]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Carrasco]]></surname>
<given-names><![CDATA[Moisés]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Centro de Ciencias de la Atmósfera ]]></institution>
<addr-line><![CDATA[Mexico City ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Centro de Geociencias ]]></institution>
<addr-line><![CDATA[Juriquilla Querétaro]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma de Guerrero Unidad Académica de Ciencias de la Tierra ]]></institution>
<addr-line><![CDATA[Taxco el Viejo Guerrero]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<volume>37</volume>
<numero>1</numero>
<fpage>1</fpage>
<lpage>8</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1026-87742020000100001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1026-87742020000100001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1026-87742020000100001&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The objective of the study was to evaluate the chemical composition of rainwater in urban and suburban areas of central Mexico to identify the possible sources of rainwater contamination. The rainwater was collected at Universidad Nacional Autónoma de Mexico, Campus Ciudad Universitaria (CU), in the southern part of Mexico City at 2200 meters above sea level (m a.s.l.). CU has many green areas with high to moderate traffic densities where air quality presents serious problems of pollution by particulate matter. The other sampling site is a forested rural area (Tlalnepantla), State of Morelos, Mexico, a suburban area 86 km to the south of Mexico City. A total of 145 rainwater samples were collected in the rain period from 2006 to 2009. The ions analyzed were the following: SO4 2-, NO3 -, Cl-, HCO3 -, Na+, K+, Ca2+, Mg2+, NH4 + and H+. Ammonium was the most abundant cation in both sites and is one of those responsible for the neutralization of acidic compounds in the atmosphere. The relative abundance of the inorganic anions present in the rainwater was in the following order: SO4 2- &gt; NO3 - &gt; Cl-, for the alkaline metals the order was Ca2+ &gt;Mg2+ &gt; Na+ &gt; K+ and Ca2+ &gt;Mg2+ &gt;K+ &gt;Na+ for CU and Morelos, respectively. A correlation analysis shows a strong positive correlation among the ions, indicating that the most important source was anthropogenic. Air mass back trajectories were associated with the SO4 2-, Ca2+, Mg2+, NH4 + and H+ concentrations observed on each rainy day. Four factors were used in the statistic analysis and was weighted within each factor. Weights greater than 0.5 are considered to be significant components of each factor. The four factors explain 84.7 % of the total variance of all of the data for CU and 66.9 % for Morelos. All of these factors were associated with all of the analyzed ions. Air pollutant back trajectories were used to understand atmospheric transport and to identify the origins and pathways of air masses influencing the concentrations of the measured ions in rainwater.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El objetivo de este trabajo fue el de evaluar la composición química del agua de lluvia en áreas urbanas y suburbanas del centro de México a fin de identificar las posibles fuentes de contaminantes en agua de lluvia. El agua de lluvia fue colectada en el Campus de la Universidad Nacional Autónoma de Mexico (Ciudad Universitaria, CU) al sur de la Ciudad de México y a 2200 m s.n.m. CU tiene muchas áreas verdes con tráfico moderado a intenso en donde la calidad del aire presenta serios problemas de contaminación por partículas. El otro sitio de muestreo es el área boscosa de Tlanepantla, Estado de Morelos, México, un área suburbana a 86 km al sur de la Ciudad de México. Un total de 145 muestras de agua de lluvia fueron colectadas en las temporadas de lluvia del 2006 al 2009. Los iones analizados fueron: SO4 2-, NO3 -, Cl-, HCO3 -, Na+, K+, Ca2+, Mg2+, NH4 + y H+ . El amonio fue el catión más abundante en ambos sitios y es unos de los iones responsables de neutralizar compuestos ácidos en la atmósfera. La abundancia relativa de aniones inorgánicos presentes en el agua de lluvia se presenta en el siguiente orden: SO4 2- &gt; NO3 - &gt; Cl- , para metales alcalinos el orden es: Ca2+ &gt; Mg2+ &gt; Na+ &gt; K+ y Ca2+ &gt; Mg2+ &gt; K+ &gt; Na+ para CU y Morelos, respectivamente. Un análisis de correlación muestra una fuerte correlación positiva entre los iones, lo cual indica que la fuente más probable es antropogénica. Las trayectorias de masas de aire fueron asociadas con las concentraciones de SO4 2- , Ca2+ , Mg2+ , NH4 + y H+ observadas durante cada día de lluvia. Se usaron cuatro factores en el análisis estadístico y a este se le dio un peso específico con cada factor. Los pesos específicos mayores de 0.5 son considerados como componentes significantes de cada factor. Los cuatro factores explican el 84.7 % de la variación total de los datos de la Ciudad de México y 66.9 % para Morelos. Todos los factores son asociados con los iones analizados. Las trayectorias de contaminantes fueron usadas para entender el transporte atmosférico e identificar origen y direcciones de las masas de aire que influyen las concentraciones de los iones medidos.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[rainwater]]></kwd>
<kwd lng="en"><![CDATA[ions]]></kwd>
<kwd lng="en"><![CDATA[air pollution]]></kwd>
<kwd lng="en"><![CDATA[back trajectories]]></kwd>
<kwd lng="en"><![CDATA[Mexico]]></kwd>
<kwd lng="es"><![CDATA[agua de lluvia]]></kwd>
<kwd lng="es"><![CDATA[iones]]></kwd>
<kwd lng="es"><![CDATA[contaminación de aire]]></kwd>
<kwd lng="es"><![CDATA[trayectorias de masas de aire]]></kwd>
<kwd lng="es"><![CDATA[México]]></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[Aherne]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Farrell]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Deposition of sulphur, nitrogen and acidity in precipitation over Ireland: chemistry, spatial distribution and long-term trends]]></article-title>
<source><![CDATA[Atmos Environ]]></source>
<year>2002</year>
<volume>36</volume>
<page-range>1379-89</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ceron]]></surname>
<given-names><![CDATA[R.M.]]></given-names>
</name>
<name>
<surname><![CDATA[Ceron]]></surname>
<given-names><![CDATA[J.G.]]></given-names>
</name>
<name>
<surname><![CDATA[Córdova]]></surname>
<given-names><![CDATA[A.V.]]></given-names>
</name>
<name>
<surname><![CDATA[Zaval]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Muriel]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Chemical composition of precipitation at coastal and marine sampling sites in Mexico]]></article-title>
<source><![CDATA[Global Nest Journal]]></source>
<year>2005</year>
<volume>7</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>212-21</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cerqueira]]></surname>
<given-names><![CDATA[M.R.F.]]></given-names>
</name>
<name>
<surname><![CDATA[Pinto]]></surname>
<given-names><![CDATA[M.F.]]></given-names>
</name>
<name>
<surname><![CDATA[Derossi]]></surname>
<given-names><![CDATA[I.N.]]></given-names>
</name>
<name>
<surname><![CDATA[Esteves]]></surname>
<given-names><![CDATA[W.T.]]></given-names>
</name>
<name>
<surname><![CDATA[Santos]]></surname>
<given-names><![CDATA[M.D.R.]]></given-names>
</name>
<name>
<surname><![CDATA[Matos]]></surname>
<given-names><![CDATA[M.A.C.]]></given-names>
</name>
<name>
<surname><![CDATA[Lowinsohn]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Matos]]></surname>
<given-names><![CDATA[R.C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Chemical characteristics of rainwater at a southeastern site of Brazil]]></article-title>
<source><![CDATA[Atmospheric Pollution Research]]></source>
<year>2014</year>
<volume>5</volume>
<page-range>253-61</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Báez A.P.]]></surname>
<given-names><![CDATA[Belmont]]></given-names>
</name>
<name>
<surname><![CDATA[R.D.. Padilla]]></surname>
<given-names><![CDATA[H.G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Chemical composition of precipitation at two sampling sites in Mexico: a 7-year study]]></article-title>
<source><![CDATA[Atmospheric Environment]]></source>
<year>1997</year>
<volume>31</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>915-25</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Balasubramanian]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Victor]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Chun]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Chemical and statistical analysis of precipitation in Singapore]]></article-title>
<source><![CDATA[Water Air Soil Poll]]></source>
<year>2001</year>
<volume>130</volume>
<page-range>451-6</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Barrie]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Lindberg]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Chan]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
<name>
<surname><![CDATA[Ross]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Arimoto]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Church]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[On the concentration of trace metals in precipitation]]></article-title>
<source><![CDATA[Atmospheric Environment]]></source>
<year>1987</year>
<volume>21</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>1133-5</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Das]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Das]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Chaudhury]]></surname>
<given-names><![CDATA[G.R.]]></given-names>
</name>
<name>
<surname><![CDATA[Das]]></surname>
<given-names><![CDATA[S.N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Chemical composition of precipitation at background level]]></article-title>
<source><![CDATA[Atmospheric Research]]></source>
<year>2010</year>
<volume>95</volume>
<page-range>108-13</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Galloway]]></surname>
<given-names><![CDATA[J.N.]]></given-names>
</name>
<name>
<surname><![CDATA[Linkens]]></surname>
<given-names><![CDATA[G.E]]></given-names>
</name>
<name>
<surname><![CDATA[Keene]]></surname>
<given-names><![CDATA[W.C.]]></given-names>
</name>
<name>
<surname><![CDATA[Miller]]></surname>
<given-names><![CDATA[J.M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The composition of precipitation in remote areas of the world]]></article-title>
<source><![CDATA[Journal of Geophysical Research]]></source>
<year>1982</year>
<volume>87</volume>
<page-range>8771-6</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Galloway]]></surname>
<given-names><![CDATA[J.N.]]></given-names>
</name>
<name>
<surname><![CDATA[Knap]]></surname>
<given-names><![CDATA[A.H.]]></given-names>
</name>
<name>
<surname><![CDATA[Church]]></surname>
<given-names><![CDATA[T.M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The composition of wester n Atlantic precipitation using shipboard collectors]]></article-title>
<source><![CDATA[Journal of Geophysical Research: Oceans]]></source>
<year>1983</year>
<volume>88</volume>
<page-range>10859-64</page-range><publisher-name><![CDATA[AGU Publications]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lacaux]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Delmas]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Kouadio]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Cros]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Andreae]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Precipitation chemistry in the Mayombe forest of equatorial Africa]]></article-title>
<source><![CDATA[Journal of Geophysical Research : Atmospheres]]></source>
<year>1992</year>
<volume>97</volume>
<page-range>6195-206</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[B. K.]]></given-names>
</name>
<name>
<surname><![CDATA[Hong]]></surname>
<given-names><![CDATA[S. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[D. S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Chemical composition and precipitation and wet deposition of major ions on the Korean Peninsula]]></article-title>
<source><![CDATA[Atmospheric Environment]]></source>
<year>2000</year>
<volume>34</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>563-75</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Liu]]></surname>
<given-names><![CDATA[X.H.]]></given-names>
</name>
<name>
<surname><![CDATA[Wai]]></surname>
<given-names><![CDATA[K.M.]]></given-names>
</name>
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Zhou]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[P.H.]]></given-names>
</name>
<name>
<surname><![CDATA[Guo]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Xu]]></surname>
<given-names><![CDATA[P.J.]]></given-names>
</name>
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[W.X.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Evaluation of trace elements contamination in cloud/fog water at an elevated mountain site in Northern China]]></article-title>
<source><![CDATA[Chemosphere]]></source>
<year>2012</year>
<volume>88</volume>
<page-range>531-41</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Migon]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Journel]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Nicolas]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Measurement of trace metal wet, dry and total atmospheric fluxes over the Ligurian Sea]]></article-title>
<source><![CDATA[Atmospheric Environment]]></source>
<year>1997</year>
<volume>31</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>889-96</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Niu]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[He]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Lu]]></surname>
<given-names><![CDATA[X.X.]]></given-names>
</name>
<name>
<surname><![CDATA[Shen]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Du]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Zhang]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Pu]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Xin]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Chang]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Chemical composition of rainwater in the Yulong Snow mountain region, Southwestern China]]></article-title>
<source><![CDATA[Atmospheric Research]]></source>
<year>2014</year>
<volume>144</volume>
<page-range>195-206</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Overrein]]></surname>
<given-names><![CDATA[L.N.]]></given-names>
</name>
<name>
<surname><![CDATA[Seip]]></surname>
<given-names><![CDATA[H.M.]]></given-names>
</name>
<name>
<surname><![CDATA[Tollan]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Acid precipitation-effects on forest and fish; final report of the SNSF project 1972-1980]]></source>
<year>1980</year>
<publisher-loc><![CDATA[Oslo ]]></publisher-loc>
<publisher-name><![CDATA[SNSF Project]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sanusi]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Wortham]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Millet]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Mirabel]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Chemical composition of rainwater in eastern France]]></article-title>
<source><![CDATA[Atmospheric Environmental]]></source>
<year>1996</year>
<volume>30</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>59-71</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Shrestha]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Pandey]]></surname>
<given-names><![CDATA[V.P.]]></given-names>
</name>
<name>
<surname><![CDATA[Yoneyama]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Shrestha]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Kazama]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[An evaluation of rainwater quality in Kathmandu Valley, Nepal]]></article-title>
<source><![CDATA[Sustainable Environment Research]]></source>
<year>2013</year>
<volume>23</volume>
<page-range>341-50</page-range></nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="">
<collab>StatSoft Inc.</collab>
<source><![CDATA[STATISTICA]]></source>
<year>2010</year>
<publisher-loc><![CDATA[Tulsa, Oklahoma, USA ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Stumm]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
<name>
<surname><![CDATA[Morgan]]></surname>
<given-names><![CDATA[J.J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Aquatic Chemistry: An Introduction Emphasizing Chemical Equilibrium in Natural Waters, second edition]]></source>
<year>1981</year>
<publisher-loc><![CDATA[New York, USA ]]></publisher-loc>
<publisher-name><![CDATA[John Wiley and Sons]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Peden]]></surname>
<given-names><![CDATA[M.E.]]></given-names>
</name>
<name>
<surname><![CDATA[Bachman]]></surname>
<given-names><![CDATA[S.R.]]></given-names>
</name>
<name>
<surname><![CDATA[Brennan]]></surname>
<given-names><![CDATA[C.J.]]></given-names>
</name>
<name>
<surname><![CDATA[Demir]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[James]]></surname>
<given-names><![CDATA[K.O.]]></given-names>
</name>
<name>
<surname><![CDATA[Kaiser]]></surname>
<given-names><![CDATA[B.W.]]></given-names>
</name>
<name>
<surname><![CDATA[Lockard]]></surname>
<given-names><![CDATA[J.M.]]></given-names>
</name>
<name>
<surname><![CDATA[Rothert]]></surname>
<given-names><![CDATA[J.E.]]></given-names>
</name>
<name>
<surname><![CDATA[Sauer]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Skowron]]></surname>
<given-names><![CDATA[L.M.]]></given-names>
</name>
<name>
<surname><![CDATA[Slater]]></surname>
<given-names><![CDATA[M.J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Development of standard methods for the collection and analysis of precipitation]]></source>
<year>1986</year>
<numero>381</numero>
<issue>381</issue>
<publisher-loc><![CDATA[Champaign, Illinois ]]></publisher-loc>
<publisher-name><![CDATA[US Environmental Protection Agency, Environmental Monitoring and Support Laboratory]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Xu]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Bi]]></surname>
<given-names><![CDATA[X.H.]]></given-names>
</name>
<name>
<surname><![CDATA[Feng]]></surname>
<given-names><![CDATA[Y.C.]]></given-names>
</name>
<name>
<surname><![CDATA[Lin]]></surname>
<given-names><![CDATA[F.M.]]></given-names>
</name>
<name>
<surname><![CDATA[Jiao]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Hong]]></surname>
<given-names><![CDATA[S.M.]]></given-names>
</name>
<name>
<surname><![CDATA[Liu]]></surname>
<given-names><![CDATA[W.G.]]></given-names>
</name>
<name>
<surname><![CDATA[Zhang]]></surname>
<given-names><![CDATA[X.Y.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Chemical composition of precipitation and its sources in Hangzhou, China]]></article-title>
<source><![CDATA[Environmental Monitoring and Assessment]]></source>
<year>2011</year>
<volume>183</volume>
<page-range>581-92</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zhang]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[He]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Cao]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Ho]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Shen]]></surname>
<given-names><![CDATA[Z.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Long-term trends in chemical composition of precipitation at Lijiang, southeast Tibetan Plateau, southwestern China]]></article-title>
<source><![CDATA[Atmospheric Research]]></source>
<year>2012</year>
<volume>106</volume>
<page-range>50-60</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zhang]]></surname>
<given-names><![CDATA[Liuyi]]></given-names>
</name>
<name>
<surname><![CDATA[Qiao]]></surname>
<given-names><![CDATA[Baoqing.]]></given-names>
</name>
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[Huanbo]]></given-names>
</name>
<name>
<surname><![CDATA[Tian]]></surname>
<given-names><![CDATA[Mi]]></given-names>
</name>
<name>
<surname><![CDATA[Cui]]></surname>
<given-names><![CDATA[Jian]]></given-names>
</name>
<name>
<surname><![CDATA[Fu]]></surname>
<given-names><![CDATA[Chuan]]></given-names>
</name>
<name>
<surname><![CDATA[Huang]]></surname>
<given-names><![CDATA[Yimin]]></given-names>
</name>
<name>
<surname><![CDATA[Yang]]></surname>
<given-names><![CDATA[Fumo]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Chemical Characteristics of Precipitation in a Typical Urban Site of the Hinterland in Three Gorges Reservoir, China]]></article-title>
<source><![CDATA[Journal of Chemistry]]></source>
<year>2018</year>
<page-range>10</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
