 |
|
Clear view of the clouds will bring better weather forecasts
August 11, 2005Accurately forecasting rain will be easier thanks to new insights into clouds from a study led by the University of Leeds and UCL (University College London). Details of a new model for predicting cloud and rain -formation are published today in the Proceedings of the Royal Society A (10 August 2005).
Existing forecasting models - including ones used by the UK's Meteorological Office-assume rain droplets fall through still air within a cloud. However, there is turbulence within clouds that can speed up droplet settling and increase the likelihood of rain.
The international team developed a new mathematical model and showed for the first time how pockets of whirling air (tiny eddies) encourage collisions between very small droplets (about 1/1000 of a cm) and slightly larger droplets within a cloud. The collisions lead to the rapid growth of the larger drops - larger than a critical size of 20 microns ( 1 micron is a millionth of a metre). This size is necessary for rain to form, fall out of the clouds and, when conditions are right, reach the ground
The model's results were checked against earlier measurements from aircraft flying through different types of clouds. The cloud measurements showed the model was more accurate than existing ones, which often underestimate rainfall.
Leeds earth and environment research fellow Dr Sat Ghosh: "When your plane comes in to land you can see patterns formed by whirling air and sometimes feel the turbulence as you descend through a cloud. As cloud droplets descend through the smallest whirls of turbulence they speed up, causing them to collide with each other and the drops to grow, eventually getting big enough to fall as rain."
Lord Julian Hunt from the UCL Department of Space and Climate Physics (and ex-Chief Executive of the UK Met Office ) said: \\\
University College London
The model's results were checked against earlier measurements from aircraft flying through different types of clouds. The cloud measurements showed the model was more accurate than existing ones, which often underestimate rainfall.
Leeds earth and environment research fellow Dr Sat Ghosh: "When your plane comes in to land you can see patterns formed by whirling air and sometimes feel the turbulence as you descend through a cloud. As cloud droplets descend through the smallest whirls of turbulence they speed up, causing them to collide with each other and the drops to grow, eventually getting big enough to fall as rain."
Lord Julian Hunt from the UCL Department of Space and Climate Physics (and ex-Chief Executive of the UK Met Office ) said: \\\
University College London
Weather Forecasts Current Events and Weather Forecasts News RSSClimate studies to benefit from 12 years of satellite aerosol data
Aerosols, very small particles suspended in the air, play an important role in the global climate balance and in regulating climate change.
Texas A&M prof to predict weather on Mars
Is there such a thing as "weather" on Mars? There are some doubts, considering the planet's atmosphere is only 1 percent as dense as that of the Earth.
Soil moisture and ocean salinity satellite ready for launch
A new European Earth observation satellite will be launched in the early hours of Monday morning (2 November 2009) from the Plesetsk Cosmodrome in northern Russia.
Bugs in Boxes Shed Light on Biological Invasions
Bugs in boxes are helping UC Davis researcher Alan Hastings improve scientific tools used to predict the spread of invasive plants and animals.
Invasive species on the march: variable rates of spread set current limits to predictability
Whether for introduced muskrats in Europe or oak trees in the United Kingdom, zebra mussels in United States lakes or agricultural pests around the world, scientists have tried to find new ways of controlling invasive species by learning how these animals and plants take over in new environs.
Typhoon Choi-Wan Triggers Tropical Storm Warnings for U.S. Commonwealth of No. Mariana Islands
Microwave imagery from NASA's Aqua satellite revealed extremely high thunderstorms in Typhoon Choi-Wan as it began passing the island of Sai-Pan in the Western Pacific Ocean.
Water in a changing climate
New research announced at the international Water in a changing climate science conference in Melbourne 24-28 August, implicates pollution from Asia, Europe and North America as a contributor to recent Australian rainfall changes.
Research breakthrough will lead to more accurate weather forecasts
More accurate global weather forecasts and a better understanding of climate change are in prospect thanks to a breakthrough by engineers at Queen's University Belfast's Institute of Electronics, Communications and Information Technology (ECIT).
U-M researcher and colleagues predict large 2009 Gulf of Mexico 'dead zone'; Chesapeake Bay's oxygen-starved zone likely to shrink
University of Michigan aquatic ecologist Donald Scavia and his colleagues say this year's Gulf of Mexico "dead zone" could be one of the largest on record, continuing a decades-long trend that threatens the health of a half-billion-dollar fishery.
NOAA Forecast Predicts Large
A team of NOAA-supported scientists from the Louisiana Universities Marine Consortium, Louisiana State University, and the University of Michigan is forecasting that the "dead zone" off the coast of Louisiana and Texas in the Gulf of Mexico this summer could be one of the largest on record.
More Weather Forecasts Current Events and Weather Forecasts News Articles
 |
La Crosse Technology WS-9611U-IT-TBP Wireless Sun/Moon Weather Station with 15 Advanced Forecast Icons by The Weather Channel The La Crosse Technology WS-9611U-IT(TBP)Wireless Sun/Moon Weather Station with 15 Advanced Forecast Icons helps you prepare for your day and decide what to wear. This unit also displays sunrise/sunset for 99 cities along with moon phase. In addition, it displays indoor temperature and humidity, and outdoor temperature. Time is set by the U.S. atomic clock. Compatible with La Crosse Technology TX29U-IT 915 MHz Wireless Temperature Sensor. |
 |
Brookstone Weathercast Wireless 5-day Forecaster by brookstone Displays current temperature plus forecasted highs and lows. Built in, self setting clock connects wrelessly to the AccuWeather.com network to provide amazingly accurate tiem. |
 |
La Crosse Technology WS-9520U Wireless Projection Weather Station with 24 Forecast Icons and Atomic Clock by La Crosse Technology The La Crosse Technology Wireless Projection Weather Station with 24 Advanced Forecast Icons help you prepare for your day and help you decide what to wear. This unit also displays indoor temperature/humidity and outdoor temperature/humidity with atomic time. It projects time or outdoor temperature onto your wall or ceiling. Transmission range 330 feet. |
 |
Guide to Weather Forecasting: All the Information You'll Need to Make Your Own Weather Forecast (Firefly Pocket series) by Storm Dunlop (Author) A concise guide to weather systems and weather forecasting. As recent events have shown, weather can have very different consequences depending on where you live. b>Guide to Weather Forecasting covers every aspect of making a forecast and is a handy resource to understanding the professionals' daily weather predictions. Storm Dunlop provides detailed information and expert explanations, including: What causes weatherWeather systems and how they change Recognizing clouds and sky appearance Weather conditions, such as depressions, lows and highs, wind systems and direction, dew point, humidity, visibility, frost, anticyclones and snow The readings meteorologists use when developing a forecast Extreme weather and climate change Guide... |
 |
Bushnell 7 Day Weather Fxi Station by Bushnell A little something to help you picture next weekend. Keep your eye on the prize. With seven days of accurate, real-time weather information at the touch of the button, you can have a plan in place for next Saturday, and dress accordingly for all those occasions in between. Like all Bushnell forecasters, it requires no sensors, subscriptions or wires. Weather data is automatically updated throughout the day from AccuWeather.com using a wireless transmitter connected to your PC. Setup is quick and simple, and you can view the forecasts on your wireless transmitter or your PC. With a coverage area spanning more than 20,000 cities, live weather messaging for today's conditions, a color-changing backlight and more, it's more than enough to get you through the week. |
 |
Omnitech Wireless Weather Station: In/Out Temperature and Humidity, Forecast, Outdoor Sensor, Radio Controlled Clock with Alarm/Snooze, Calendar by Omnitech Built-in thermometer and hydrometer measure indoor/outdoor high and low temperatures and relative humidity. Forecasts weather for the next 24 hours based on barometric pressure changes. Radio controlled clock displays accurate time and automatically adjusts of daylight savings (does not work outside US - requires manual time set/adjustment). Also features full alarm/snooze functions. Provides calendar display with date and moon phases. Blue LED backlight makes for easy viewing even in low light. RF transmission range: 25 meters in open area. Box Contents: weather station (3 x AA batteries not included); remote (outdoor) sensor (2 x AAA batteries not included). |
 |
La Crosse WS-9625TWC-IT Wireless Forecast Station with Oscar Outlook by La Crosse Technology Have your own Personal Weatherman! He will even show you what to wear! Weather Forecasting Icons display weather events due to Barometric Pressure and Outdoor Temperature and Weather Boy Icon changes clothing to fit. Featuring Self-Setting Accurate Tim |
 |
Forecast: Tomorrow by Weather Report From 1970 to 1985, the jazz-fusion ensemble known as Weather Report reigned supreme as one the most distinguished and indefinable ensembles of the 20th century, and saxophonist Wayne Shorter and keyboardist Joe Zawinul were the cofounders of this ever-changing group. This superb, three-CD, 37-track collection features the band's incredible cast of musicians: drummers Peter Erksine and Alphonse Mouzon; percussionists Airto Moreira, Alex Acuna, and the late Don Alias; bassists Miroslav Vitous, Alphonso Johnson, and the incredible Jaco Pastorius. The roots of their sound are heard in Zawinul's "In A Silent Way," and their greatest hits--from "A Remark You Made" and an unreleased version of "Nubian Sundance" to their 1976 mega-hit, "Birdland," are included here, along with the lesser known... |
 |
Michael Fish Retro Weather Forecast Fridge Magnets by nov |
 |
OREGON SCIENTIFIC WEATHER FORECAST WHITE by Oregon Scientific Stylish and VersatileAs featured in O at Home magazine!Simple to use and easy to set up, the Oregon Scientific BA168 Weather Hub is an ideal weather accessory to any home, office or dorm. At a quick glance, know the indoor temperature and what the 12 to 24-hour weather forecasts will be. Besides the traditional desktop display and wall mount options, a magnet mount has been included for additional set-up convenience on metallic surfaces. |
| © 2009 BrightSurf.com |