<?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>0016-7169</journal-id>
<journal-title><![CDATA[Geofísica internacional]]></journal-title>
<abbrev-journal-title><![CDATA[Geofís. Intl]]></abbrev-journal-title>
<issn>0016-7169</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Geofísica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0016-71692019000100073</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[A method for a rapid measurement of geostrophic currents in coastal waters: A bay case study]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Filonov]]></surname>
<given-names><![CDATA[Anatoliy]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pantoja]]></surname>
<given-names><![CDATA[Diego A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mireles-Loera]]></surname>
<given-names><![CDATA[Omar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tereshchenko]]></surname>
<given-names><![CDATA[Iryna]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ladah]]></surname>
<given-names><![CDATA[Lydia Betty]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Monzon]]></surname>
<given-names><![CDATA[Cesar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Guadalajara  ]]></institution>
<addr-line><![CDATA[Guadalajara Jalisco]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Centro de Investigación Científica y de Educación Superior de Ensenada  ]]></institution>
<addr-line><![CDATA[Ensenada Baja California]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2019</year>
</pub-date>
<volume>58</volume>
<numero>1</numero>
<fpage>73</fpage>
<lpage>79</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0016-71692019000100073&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0016-71692019000100073&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0016-71692019000100073&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Geostrophic currents were computed using the method of fast thermohaline measurements from data obtained with an undulating CTD along two parallel transects in coastal waters. The method allows for the calculation of geostrophic currents in every quadrilateral set formed by each consecutive cast of the parallel hydrographic lines. With this methodology, it was possible to obtain very rapid data; for example, if the length of a section was 20 km, the distance between soundings was 1 km and the measuring depth was up to 300 meters, it would only take ~5 hours to complete the survey. Validation of the proposed method was carried out in Banderas Bay, México, where a very dense survey was taken; almost 120 casts were sampled over 2 days. With this sampling it was possible to construct a regular mesh where hydrographic data were objectively mapped and then the geostrophic currents were calculated in the traditional way using the GSW_TEOS10 toolbox. The root-mean-square deviation between both calculations was less than 3.5 %. In the case of the present study, the methodology was tested in a bay, where currents showed relatively stable patters that were persistent and well structured, suggesting this methodology may be applied to other sites, but caution is suggested in sites with large variability.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Mediante el método de CTD ondulante se calculan las corrientes geostróficas en un par de secciones paralelas cerca de la costa. Las componentes de la velocidad se estiman en cada cuadrilátero formado entre las secciones y las estaciones consecutivas. Con ésta metodología una campaña se puede realizar en tan solo 5 horas, si por ejemplo se considera un transecto de 20 km de longitud, con estaciones a cada 1 km y hasta una profundidad de 300 m. Para verificar esta metodología, se usaron datos de una campaña hidrográfica en Bahía de Banderas donde se tomaron hasta 120 perfiles en dos días de trabajo, con los cuales se realizó una malla regular con técnicas de mapeo objetivo de los campos hidrográficos que al final se compararon con las corrientes geostróficas calculadas mediante las rutinas GSW-TEOS10. La diferencia entre los resultados de la malla regular y las secciones paralelas resulto menor del 3.5%. En el presente estudio, la metodología se probó en una bahía, donde las corrientes observadas mostraron una estructura bien definida y persistente durante el muestreo, por lo que aplicar esta metodología en otras partes de la zona costera, por ejemplo en mar abierto, podría presentar más variabilidad en los resultados.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Bahía de Banderas]]></kwd>
<kwd lng="es"><![CDATA[CTD ondulante]]></kwd>
<kwd lng="es"><![CDATA[Líneas Paralelas de hidrografía]]></kwd>
<kwd lng="es"><![CDATA[Corrientes geostróficas]]></kwd>
<kwd lng="en"><![CDATA[Banderas Bay]]></kwd>
<kwd lng="en"><![CDATA[undulating CTD measurements]]></kwd>
<kwd lng="en"><![CDATA[parallel hydrographic lines]]></kwd>
<kwd lng="en"><![CDATA[geostrophic currents]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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