Free Newsletters - Space News - Defense Alert - Environment Report - Energy Monitor
. 24/7 Space News .




SHAKE AND BLOW
Atmospheric rivers set to increase UK winter flooding
by Staff Writers
London, UK (SPX) Jul 31, 2013


File image courtesy AFP.

The prolonged heat wave that has bathed the UK in sunshine over the past month has given the country an unexpected taste of summer that has seemed to be missing in recent years.

However, a new study published in IOP Publishing's Environmental Research Letters, has provided warnings that will chime with those accustomed to more typical British weather.

According to the study, winter flooding in the UK is set to get more severe and more frequent under the influence of climate change as a result of a change in the characteristics of atmospheric rivers (ARs).

ARs are narrow regions of intense moisture flows in the lower troposphere of the atmosphere that deliver sustained and heavy rainfall to mid-latitude regions such as the UK.

They are responsible for many of the largest winter floods in the mid-latitudes and can carry extremely large amounts of water: the AR responsible for flooding in the northwest of the UK in 2009 transported 4500 times more water than the average flow in the River Thames in London.

The researchers, from the University of Reading and University of Iowa, found that large parts of the projected changes in AR frequency and intensity would be down to thermodynamic changes in the atmosphere, rather than the natural variability of the climate, suggesting that it is a response to anthropogenic climate change.

To reach these conclusions, the researchers used simulations from five state-of-the-art climate models to investigate how the characteristics of ARs may change under future climate change scenarios.

Firstly, they used the climate models to see how accurately they could simulate the ARs that occurred between 1980 and 2005. The five models did this successfully and were deemed capable of projecting how future ARs will develop under different scenarios.

The models were then used to simulate future conditions under two scenarios - RCP4.5 and RCP8.5 - that represent different, yet equally plausible, scenarios for future increases in greenhouse gas concentrations in the atmosphere. They projected changes that would occur between 2074 and 2099.

Each of the five models simulated an increase in AR frequency. For the RCP8.5 projections, which represents stronger increases in greenhouse gas concentrations than RCP4.5, there was a striking level of consistency in the magnitude of change in AR frequency - all models showed an approximate doubling of the number of future ARs compared to the simulations for 1980 - 2005.

The models also projected an increase in intensity of the ARs, meaning an AR impacting the UK in the future is projected to deliver more moisture, potentially causing larger precipitation totals.

Lead author of the research, Dr David Lavers, said: "ARs could become stronger in terms of their moisture transport. In a warming world, atmospheric water vapour content is expected to rise due to an increase in saturation water vapour pressure with air temperature. This is likely to result in increased water vapour transport.

"The link between ARs and flooding is already well established, so an increase in AR frequency is likely to lead an increased number of heavy winter rainfall events and floods. More intense ARs are likely to lead to higher rainfall totals, and thus larger flood events."

Paper available here

.


Related Links
IOP
Bringing Order To A World Of Disasters
When the Earth Quakes
A world of storm and tempest






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





SHAKE AND BLOW
Lourdes closed, 200 evacuated after flash floods
Toulouse, France (AFP) June 18, 2013
French authorities Tuesday shut the grotto at Lourdes and evacuated about 200 people following flash floods at the Roman Catholic pilgrimage site. The preventive measure came a day after heavy rain and unseasonal snowfall in the area led to rivers flowing well above their normal levels, even cutting off some roads. "The Sanctuaries are closed," the local prefecture of the Haute-Garonne a ... read more


SHAKE AND BLOW
Environmental Controls Move Beyond Earth

Bad night's sleep? The moon could be to blame

Moon Base and Beyond

First-ever lunar south pole mission could be attempted by 2016

SHAKE AND BLOW
Mars Rover Opportunity Nears Solander Point

Curiosity Mars Rover Gleams in View from Orbiter

Mars Curiosity sets one-day driving distance record

Scientists establish age of Mars meteorites found on Earth

SHAKE AND BLOW
First Liquid Hydrogen Tank Barrel Segment for SLS Core Completed

Tenth Parachute Test for NASA's Orion Adds 10,000 Feet of Success

Zero Point Frontiers Delivers Favorable Architecture Assessment to Golden Spike Company

NASA and Korean Space Agency Discuss Space Cooperation

SHAKE AND BLOW
China launches three experimental satellites

Medical quarantine over for Shenzhou-10 astronauts

China's astronauts ready for longer missions

Chinese probe reaches record height in space travel

SHAKE AND BLOW
NSBRI Wants Ideas To Support Space Crew Health and Performance

NASA narrows list of possible culprits in spacesuit water leak

Unmanned Russian cargo craft lands in Pacific Ocean

Russian supply ship docks with orbiting space station

SHAKE AND BLOW
SpaceX Awarded Launch Reservation Contract for Largest Canadian Space Program

ULA Continues Rapid, Reliable Launch Rate

Launch Vehicles for Achieving Low and High Orbits

The second satellite arrives for Arianespace's upcoming heavy-lift Ariane 5 launch

SHAKE AND BLOW
Pulsating star sheds light on exoplanet

Chandra Sees Eclipsing Planet in X-rays for First Time

A warmer planetary haven around cool stars, as ice warms rather than cools

Solar system's youth gives clues to planet search

SHAKE AND BLOW
Laser communication system for spacecraft in successful test

Make It Yourself and Save - a Lot - with 3D Printers

Lifelike cooling for sunbaked windows

Sony, Panasonic mulling 300-gigabyte Blu-ray format




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement