Rule number 1: Always wear your life jacket out on deck, be aware of your surroundings and know your limits.

    Life jackets on the R/V Ukpik.  Beaufort Sea. Transect 6
    Always wear a life jacket on deck, no matter how interesting and distracting the marine life is! September 2, 2012. Photo courtesy of Dr. Carin Ashjian.

    Today we’re going out to complete sampling stations along transect number 6, which means we’re heading out into the Beaufort SeaThe Beaufort Sea lies to the north of Alaska and the Yukon and Northwest Territories. approximately 46 miles from our home port of Barrow! Every three miles or so we’ll be stopping to use the CTDA research tool that is submerged in the water to measure conductivity (salinity), temperature, and depth., collect water samples in Niskin bottles and/or collect organisms (hoping for krill!) in our Tucker trawl and ring net tows.

    Niskin water sample collection bottle on board the R/V Ukpik.
    Niskin water sample collection bottle on board the R/V Ukpik.September 2, 2012. Photo by Lisa Seff.

    Whew! With a stiff breeze blowing from the Northeast the seas have obviously been worked up since our last trip. This should be an interesting day!

    Heading offshore over the Beaufort Sea for transect 6.
    Heading offshore over the Beaufort Sea for transect 6. So many stations....so little time! September 2, 2012. Photo by Lisa Seff.

    The decks are wet and rolling, the icy Arctic salt spray flies through the air and heavy pulleys swing madly on the A-frame. Walking from point A to point B takes on additional thought processes including complex trajectory models that include potential changes in body velocity due to the pitching of the boat. Working with the oceanographic equipment requires planned three "body to something else" contact points just to remain in one position! Consequently, the focus on the science is always preceded by the thought of: safety first. So it’s life jackets on and hands on the rail as you join us on our sea cruise out into the Beaufort SeaThe Beaufort Sea lies to the north of Alaska and the Yukon and Northwest Territories..

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    Through the Porthole: Oceanographic Instruments Part II, Introducing the CTDA research tool that is submerged in the water to measure conductivity (salinity), temperature, and depth.!

    Through the Porthole artwork by Springs School 8th grade student.
    Through the Porthole artwork by Springs School 8th grade student. Artwork completed June 2012.

    A CTDA research tool that is submerged in the water to measure conductivity (salinity), temperature, and depth. is an instrument package of sensors linked together that directly measure ocean conductivity, temperature and depth. Scientists can then use the data to figure out much more.

    CTD on the deck of the R/V Ukpik.  With egg and ready to go!
    CTD ready on deck, with egg and ready to go! September 2, 2012. Photo by Lisa Seff.

    Knowing conductivity, which measures how easily electrical currents can pass through water, scientists can determine the salinity of the ocean. Electric current will pass through salt water more readily than fresh water. Saltier water carries electricity better than less salty water. When scientists know pressure they also know depth, as depth and pressure are directly related to each other. Finally, if you know temperature, pressure and conductivity you can calculate the density of the ocean water.

    The CTDA research tool that is submerged in the water to measure conductivity (salinity), temperature, and depth. our team deployed off the stern at individual stations records about 8 temperature and conductivity measurements per meter as it is lowered toward the ocean floor. Considering that some areas we sampled are over 190 meters deep, that’s a lot of data! The CTDA research tool that is submerged in the water to measure conductivity (salinity), temperature, and depth. digitally stores the data as it descends. Once it's back on deck the data are easily downloaded to our on-board computers for organization and analysis. Why do scientists care about these data? It turns out that all of these physical and chemical characteristics help them to describe the ocean ‘weather’ and create detailed models to better understand the underlying ocean systems that affect living organisms in this region of the Arctic Ocean.

    Regla No 1: siempre lleva puesto la chaqueta salvavidas sobre cubierta, se pendiente de tu alrededor, y conoce tus limites.

    Life jackets on the R/V Ukpik.  Beaufort Sea. Transect 6
    Always wear a life jacket on deck, no matter how interesting and distracting the marine life is! September 2, 2012. Photo courtesy of Dr. Carin Ashjian.

    Hoy salimos a completar las estaciones de muestreo a lo largo de la sección 6, que quiere decir que salimos hacia el mar de Beaufort aproximadamente 46 millas de nuestro puerto base en Barrow!. Haremos paradas cada tres millas para usar el CTD, coleccionar muestras de agua en botellas Niskin y/o coleccionar organismos (esperamos krill!) en nuestras redes de arrastre Tucker y anillo.

    Niskin water sample collection bottle on board the R/V Ukpik.
    Niskin water sample collection bottle on board the R/V Ukpik.September 2, 2012. Photo by Lisa Seff.

    Whew! Con una buena briza soplando del noreste la mar obviamente se ha agitado desde nuestro último viaje! Va a ser un día interesante!

    Heading offshore over the Beaufort Sea for transect 6.
    Heading offshore over the Beaufort Sea for transect 6. So many stations....so little time! September 2, 2012. Photo by Lisa Seff.

    Las cubiertas están mojadas y rodando, el espray salado ártico vuela por el aire y poleas pesadas columpian locamente en el marco A. Caminar de punto A hacia punto B requiere pensamientos adicionales incluyendo modelos de trayectoria complejos que incluyen cambios potenciales de velocidad de cuerpo como resultado de la inclinación del barco. Trabajando con equipo oceanográfico requiere tres “cuerpos con algo más” puntos de contacto simplemente para mantenerse en una posición! Consecuentemente, el enfoque a la ciencia siempre empieza con el pensamiento de: primero la seguridad. Así que son chaquetas salvavidas puestas y manos en todos los pasamanos a lo que se juntan con nosotros en el crucero hacia el mar de Beaufort.

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    A través de la ventanilla: Instrumentos oceanográficos parte II: Presentando el CTD!

    Through the Porthole artwork by Springs School 8th grade student.
    Through the Porthole artwork by Springs School 8th grade student. Artwork completed June 2012.

    El CTD es un paquete de instrumentos de sensores conectados juntos que directamente miden conductividad oceanográfica, temperatura, y profundidad. Científicos pueden usar los datos para averiguar mucho mas.

    CTD on the deck of the R/V Ukpik.  With egg and ready to go!
    CTD ready on deck, with egg and ready to go! September 2, 2012. Photo by Lisa Seff.

    Conociendo conductividad, que mide que tan fácil pueden pasar las corrientes eléctricas a través del agua, científicos pueden determinar la salinidad del océano. Corriente eléctrica pasa por agua salada más rápidamente que por agua dulce. Agua mas salada conduce electricidad mejor que agua menos salada. Cuando científicos saben presión también saben profundidad, ya que presión y profundidad están directamente relacionadas. Finalmente, si saben la temperatura, presión y conductividad pueden calcular la densidad del agua.

    El CTD que nuestro equipo hecho a estribor en estaciones individuales graba aproximadamente 8 medidas de temperatura y conductividad cada metro mientras baja hacia el piso del mar. Considerando que ciertas áreas que muestreamos tenían más de 190 metros de profundidad, estos son muchos datos. Una vez que están en cubierta los datos se descargan a los computadores de abordo para organización y análisis. Porque se preocupan los científicos por estos datos? Todas estas características físicas y químicas les ayudan en describir el “clima “ oceanográfico y crear un modelo detallado para entender mejor los sistemas oceanográficos que afectan a los organismos vivientes en esta región del océano Ártico.

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    Weather Summary
    Cold and partly cloudy.
    Wind Speed
    18

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