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Weather Monitoring


negative surface flux for NO2, but no significant regions of consumption were


identified. The location of the NO2 sink is not yet clear, nor the organisms and


biogeochemical processes responsible. Conclusions


The Gasmet DX4015 never failed, even in the most extreme conditions


This contrasts with traditional methods of soil gas analysis, which employ lab-based gas chromatography systems and collection of samples ‘blind’ in the field.”


Results


Surprisingly, the work revealed areas of strong CO2 and CH4 production immediately above the permafrost. Brummell believed this was the result of the relative disparity in carbon distribution in Arctic soils in comparison with warmer climes. Carbon accumulates far lower in Arctic soils due to a process known as cryoturbation; the constant mixing and burying of organic matter, which fuels microbial activity at a deeper level.


Comparisons between the surface flux and the soil profile for each of the greenhouse gases was a key objective within Brummell’s investigation. Most notably, Brummell observed a


Martin Brummell’s research provided a new but complex insight into the production, consumption and exchange of greenhouse gases and soil microbe pathways in the Arctic. His work highlighted the importance of reliability, ruggedness, flexibility and accuracy in the equipment which is employed in such work. However, the ability of the DX4015 to provide simultaneous measurement of multiple gases in near real-time was a major advantage.


In comparison with all of the equipment that is necessary for research in Arctic conditions, one might imagine that a highly sensitive analytical instrument would be the most likely to be adversely affected. However, Martin Brummell found this not to be the case with the Gasmet DX4015: “In contrast to other field equipment I have used in the High Arctic, including self-destructing sledgehammers, unreliable generators and broken fibre-optic cables, the


Gasmet DX4015 has never failed even in the most difficult field conditions. It has happily survived air-transport, inconsistent electrical supply, low temperatures, rain, snow, mud and all other insults, and always gives me accurate, precise measurements of gas concentrations.”


Further information on Gasmet FTIR is available at www.quantitech.co.uk


21


Hand Held Weather Stations


The Kestrel pocket weather meters from Richard Paul Russell (UK) offers one of the most accurate hand-held weather instruments on the market. The range starts with the Kestrel 1000, the basic anemometer and goes through to a fully portable weather station which monitors 21 different environmental parameters, including wind direction and density altitude.


The Kestrel 4000 series is able to log real time environmental data, with a storage capacity of up to 2000 data points. All data can be sampled between two second and twelve hour intervals. Data may also be manually captured, allowing users to freeze readings. All sorted data is time and


date stamped.


These units have the option of real time wireless data transfer, over a distance of up to 10 meters using Bluetooth®


technology or alternatively data can be uploaded to a PC via a


Kestrel interface. The ability to easily transfer data allows the user to run in-depth analysis and offers long-term storage.


All Kestrel units come with a patented impeller capable of responding to a breeze as low as 0.4 m/s and with an accuracy of +/-3%. In case of damage the impeller can be easily replaced by the user. All models (with the exception of the Kestrel 1000 which measures solely wind speed) have a patented external thermometer. Having it externally mounted, instead of embedded inside the case eliminates temperature error caused by heat from the user’s hand. Additionally, all Kestrel Meters are fully waterproof and float, so they can be used to read water and snow temperatures by simply submerging the unit.


The patented humidity sensor configuration rapidly adjusts to abrupt and substantial changes in temperature and humidity. Relative humidity can be measured to +/- 3% accuracy over a broad range (5 to 95%RH).


Each Kestrel comes with a Certificate of Conformity to certify its accuracy to the performance specifications, providing assurance of precise and reliable readings. They are rugged and durable units; backed up by a five year warranty


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For immediate information on products featured in this issue please email us today!


info@iet-pub.com


New Marine Ultrasonic Anemometer


The Model 85106 Marine Ultrasonic Anemometer from RM Young (USA) is an accurate no-moving-parts wind sensor with features for the marine environment. A reinforced transducer array accurately measures wind speed and direction and provides a serial NMEA signal.


Analogue voltage signals are also available from the junction box. For extra safety and piece of mind, internal electronics are coated for moisture resistance. Bird spikes are also incorporated into the structure to discourage perching.


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New Meteorological Translator


The new Model 26800 Meteorological Translator from RM Young (USA) offers a wide range of sensor inputs and signal outputs as well as a large, illuminated LCD display. Fully programmable, the 26800 can be configured to take measurements from all RM Young sensors and display up to 8 screens of data or text.


Internal memory is capable of storing over 2 million data records. Programming and record retrieval is


easy using the supplied RMYCOMM™ program. In addition, the 26800 is designed for convenient mounting on instrument panels or bulkheads.


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IET November / December 2011 www.envirotech-online.com


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