FOCUS ON WEATHER MONITORING 31 Weather monitoring in extreme conditions
A VENTUS X ultrasonic wind sensor, from OTT, has been deployed by researchers at the Summit Station on the Greenland Ice Sheet in the Arctic, 10,000 feet above sea level, as part of a project investigating the role of aerosols in cloud formation. With integrated heaters and no moving parts, the wind sensor does not require recalibration – a vital feature of equipment in one of the most remote locations on Earth.
Aerosols are important in cloud formation because they act as condensation nuclei, providing seeding sites for water vapour condensation, and as ice nucleating particles which modulate the formation of ice in clouds.
The Greenland Ice Sheet is of critical importance to human society because of its role in global sea-level rise, and is of particular concern because it is melting at an increasing rate. An understanding of aerosol-cloud interactions is therefore extremely important; especially where clouds are comprised of both ice and supercooled liquid water, because this represents a major source of uncertainty in weather and climate models. Scientists from the University of Leeds School of Earth and Environment, and the National Centre for Atmospheric Science are therefore seeking to reduce this uncertainty with the use of advanced remote sensing technology, such as radar and lidar, in combination with satellite observations and a suite of other ground-based sensors (such as the VENTUS) and state-of-the-art numerical weather and climate models.
The project is seeking to determine the extent to which different aerosol properties cause signifi cant changes in clouds, and to quantify the role aerosols may have on the melting of the Greenland Ice Sheet. In addition, this work is evaluating regional and global numerical weather and climate model performance against the project’s observations; to identify any defi ciencies that lead to biases in cloud occurrence, cloud thickness, and phase partitioning.
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British meteorological specialists to return to Intermet Asia 2020
After 5 successful years attending the exhibition, meteorological specialists, Biral is returning to InterMet Asia in Singapore in July to showcase its technically advanced meteorological products.
Biral experts will be at the show demonstrating a wide variety of meteorological equipment. These are the BTD-200 Thunderstorm Detector, VPF-730 and SWS-200 Visibility & Present Weather Sensors, the BTD-350 and BTD-300 Thunderstorm Detectors.
New BTD-200 Lightning Warning System
The new BTD-200 lightning warning system is a complete detection and warning system which has been developed from the Biral range of professional aviation grade lightning detection systems. It reliably detects the local presence of all forms of lightning out to a range of 35km (22 miles) from the sensor. Designed to be installed and set up by non- technical staff, it comes with a power supply and the essential PC application ‘Lightning Works’, for monitoring and warning personnel of approaching thunderstorms.
VPF-730 & VPF-750 Visibility & Present Weather Sensors
As Biral’s most corrosion resistant design, the VPF-Series provides accurate visibility and present weather measurements and has been specifi ed for many installations due to its effi ciency, reliability and performance. The sensors are a compact and robust package which makes them particularly suitable as part of an aviation AWOS system. Its exceptionally long service life (15+ years) makes it ideal in coastal or offshore locations where the ambient conditions can be severe.
SWS-200 Visibility & Present Weather Sensor
The SWS-200 is designed for use in applications where accurate and reliable visibility measurements are required with the addition of WMO 4680 present weather codes. The sensor measures Meteorological Optical Range (MOR) as well as reporting the presence of liquid and frozen precipitation. A feature of Biral sensors is their ability to report precipitation intensity according to a range of national standards. The unique backscatter receiver gives the SWS-200 unparalleled abilities in distinguishing frozen from liquid precipitation.
BTD-350 Thunderstorm Detector
With its rugged design for marine applications, the BTD-350 Thunderstorm Detector, following the current BTD-300, is a standalone sensor that detects the presence of all forms of lightning to a range of 83 km. The BTD-350 is designed for marine applications, where severe weather, saltwater corrosion and platform vibration produce a challenging environment for environmental sensors. The metalwork is corrosion-resistant stainless steel and aluminium, further protected by marine-grade paintwork. Reinforced antenna supports prevent damage from excessive vibration. This design has been extensively tested in the laboratory and meets European marine vibration, marine radio interference and marine corrosion standards.
BTD-300 Thunderstorm Detector
The company’s BTD-300 Thunderstorm Detection system uses a new technology detection system which has signifi cant benefi ts for the aviation sector. The system has the ability to detect all forms of lightning within an 83km radius, including warning of potential overhead lightning. The equipment is immune to man-made false alarms making it highly reliable in safety critical situations such as civil and military airports.
More information online:
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BTD-200 LIGHTNING WARNING SYSTEM
Warns of lightning risk even before the fi rst strike
• Minimal installation
• Fully automatic alarm triggering Ideal for:
• Golfi ng and outdoor sports
• Roof-top gardens • Theme parks
• Public / private schools • Container Ports
• Oil / gas storage and • Production facilities • Solar / wind generation • Mining operations
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www.biral.com
WWW.ENVIROTECH-ONLINE.COM AET ANNUAL BUYERS’ GUIDE 2020
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