32 Air Monitoring


Enhanced Lightning Detection System Looks into the Eye of the Storm


As we move out of the official hurricane season, Vaisala (Finland) announces the public release of a unique lightning data set accompanying this year’s record breaking Hurricane Patricia, as captured by the newly upgraded GLD360 global lightning detection network.


With a record breaking count of 30, the northern hemisphere has seen more major hurricanes and typhoons of category 3, 4 and 5 in 2015 than in any previous season. Particularly vigorous activity in the Pacific, attributed partly to a potent El Niño, has made a major contribution. While Sandra became the strongest hurricane to develop so late in the season, developing during the latter half of November, the year was underscored by Patricia in late October, which, with wind speeds of 200mph, became the strongest tropical cyclone ever recorded in the western hemisphere.


GLD360 provides continuous monitoring of storm events wherever they occur, and in comparison with the other tropical cyclones, the lightning associated with hurricane


Patricia was particularly remarkable. It had sustained eye-wall lightning for more than 30 hours, a phenomenon not sustained for more than a few hours, in any tropical cyclone, since Super-Typhoon Haiyan, back in 2013, regarded as one of the strongest storms ever, with sustained winds of 195mph.


Says Ron Holle, meteorologist and lightning authority: “Patricia is now among the few storms that show lightning in a tight circle in the eyewall. More than 90% of named systems do not. Those that have continuous lightning along the track are typically very strong.”


“For the last 5 years the GLD360 has provided excellent detection of cloud-to-ground lightning, and in the summer our team implemented a major change that dramatically improved the detection of cloud lightning flashes. Overnight the average number of global events the system detects per day increased from 3,000,000 to 6,000,000. The detection of total lightning has given us an even more detailed insight to lightning associated with storms like Patricia.” says Ryan Said, lead Vaisala GLD scientist.


The recent upgrade improves the GLD360’s performance, reinforcing its effectiveness for lightning and severe weather warning at both a local and regional level, and improves its value to meteorological agencies, providing additional lightning information within their own countries, and in neighboring countries and oceans.


It provides not only valuable information for organisations to keep their operations running efficiently, limiting costly down-time and keeping workers safe, but also an insightful view of global weather patterns and severe weather events.


Today the GLD360 is used by meteorological agencies, aviation, mining, shipping and governmental organisations across the globe including the US Federal Aviation Administration and the US National Weather Service.


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Sensor Technology with Accuracy Beyond Your Imagination


Picture a new weather sensor, which was so precise that a normal calibration laboratory would not able to measure the accuracy? Imagine there is an environmental sensor, which could serve as the reference for all other environmental sensors. With Lufft’s (Germany) innovative WS3000 this fantasy becomes a reality. The new, high-quality aluminum housing design, the size and especially the performance show off the excellence of this new Lufft product. This makes the innovative weather sensor not only WMO compliant but also attractive for the requirements of airports and meteorological services.


Lufft USA presented the new product sensation at the 96th Annual Meeting of the AMS (American Meteorological Society) in New Orleans, LA, US between January 10 and 14, 2016


for the first time. Before the official product rollout of the WS3000 and WS3100 in the middle of 2016, they will be tested by the several public European weather services for half a year.


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The WS3000 measures air temperature, relative humidity and air pressure. It’s the first product version of a new WS1000 series, which will be followed by WS3100 in 2016 and WS4000 in 2017. They will be supplemented with the high precise Kipp & Zonen CMP10 radiation sensor respectively a high-precision radar precipitation sensor.


“The temperature measuring unit consisting of a coiled platinum sensor and a “low-drift electronic” promises a long-term stability of 10mk/a. Also the electronic of the air pressure measurement is very stable in the long term with 0,05hPa/20a. The heated humidity sensor responses extraordinary fast and without any saturation effect. It supports a 1-point, 2-point and multipoint calibration for each sensor. If desired, a second, redundant pressure sensor can be added. For the built-in fan, we calculate with a life cycle of 180.000h, which equals 20 years. Moreover, the anodized aluminum housing with the stainless steel mounting holders, the sensor is very robust and contrasts with the other WS family members by design and accuracy. All single parts are fixed with standard Allen screws and can be deployed easily for installation, maintenance and calibration purposes”, explains head of Lufft development Axel Schmitz-Hübsch.


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IET January / February 2016 www.envirotech-online.com


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The whole new WS1000-series communicates via RS485 and WIFI interface, which can be de- activated on request. The main advantage of a WIFI interface is the opportunity to view the sensor’s data and to configure it via laptop, mobile phone or tablet comfortably. Alternatively users can receive the data via the UMB-Binary, UMB-ASCII, SDI-12, MODBUS and NMEA protocol.


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