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 T-Chain Research in Germany
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 Contour Plot from Italy
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 New Oxygen Logger
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 Real-Time data Software
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 LakeESP Survives Large Rain Storm
   
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New Oxygen Logger


 

 


PME now offers the miniDOT, a small dissolved oxygen/ temperature logger.

The dissolved oxygen sensor is an optode and collects measurements with an accuracy of +/- 5% and temperature to +/- 0.1 degrees C. It is self contained and able to function in a variety of environments. Data are stored to an internal SD Card.



PME Attends PPNW Conference
Dr. Michael Head recently attended the PPNW conference held in Burlington, Canada. Topics included physical and biogeochemical processes that control water quality and ecosystem function.
 


Researchers with the Environmental Physics Group at the University of Konstanz investigated the properties of solitary-like waves in Lake Constance over several years using a T-Chain. They are particularly interested in the occurrence of large internal waves because these affect mixing in the thermocline via breaking.

In order to generate data, they deployed a PME T-Chain for over six years in the center of a sub basin Lake Constance, Germany. The T-Chain measured temperature every minute. The accuracy of at least 0.02 °C over the six years allowed the identification of large-scale temperature overturns in association with solitary-like waves.

The contour plots to the right demonstrate the strengthening of stratification during Spring together with several cycles of basin-scale internal seiche and the passage of a solitary-like wave train.

LakeESP Survives Large Storm

 

A LakeESP installed in Beaver Lake, Arkansas survived a large rainstorm earlier this year. Reed Green with the U.S. Geological Survey informed PME that the elevation of the dam rose 4.24m in less than four days. The station moved about 30 to 50 meters during the event, but nothing was damaged and all sensors and electronics functioned well.

See real-time data


 

 
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Precision Measurement Engineering, Inc.
1487 Poinsettia Ave. Suite 129
Vista, CA 92081
(760) 727-0300
E-mail: info@pme.com

 


PME recently developed software to display real-time LakeESP data. The LakeESP is a lake sensor buoy that can monitor a variety of water and meteorological parameters. Measurements of all sensors found on the LakeESP are telemetered via GSM to a shore computer. The LakeESP software then extracts data from the shore computer and displays them with various profiles and contour plots.

It requires Java Run Time Engine V1.6 and is able to run on IE and Firefox PC platforms. Other browsers/ platforms are not yet tested. The software can be easily added to any web page.

View real-time data from a reservoir in North America.



 

 

Researchers with the Università degli Studi di Brescia in Italy are using a PME T-Chain to study thermal stratification and internal waves in Lake Iseo. Temperature data are being used to create numerical models of the thermal stratification evolution over a year and basin scale internal waves.

The T-Chain is sampling data every 20 seconds and has recorded temperature continuously for 1.5 years. A data contour plot can be seen to the right. Data are sampled so frequently in order to detect non linear waves and high frequency waves within the deep lake.

Information is provided by Giulia Valerio at the Università degli Studi di Brescia