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




WATER WORLD
Warmer Earth will have less rain, not more: study
by Staff Writers
Paris (AFP) Jan 30, 2013


Climate scientists said Wednesday they found evidence to back predictions for a future with lower average rainfall, even though Earth's past warming episodes had led to more precipitation, not less.

Writing in the journal Nature, researchers said they had found proof that global warming caused by Man's greenhouse-gas emissions has a different effect on rainfall than warming caused by increased solar radiation.

Warming induced by carbon emissions is expected to accompany a rise in droughts in the future, they said.

This runs contrary to experience during the so-called Medieval Warm Period, from 1000 to 1250 AD, when Earth was hotter than today as a result of solar heating -- but also wetter.

Scientists have long battled to understand the apparent contradiction.

Now they have shown that the two causes induce warming in different regions of the atmosphere, with different outcomes for rainfall formation.

The introduction of heat-absorbing greenhouse gases leads to a narrowing of the usual temperature difference between different layers of the atmosphere -- thus a more stable atmosphere that is less conducive to rain, said the report.

"For the same increase in temperature, solar heating will induce an overall higher level of rainfall than greenhouse gases," said a Nature press statement.

"Less rainfall (under the greenhouse-gas warming scenario) means on average increasing chances for droughts," said co-author Bin Wang of the University of Hawaii's International Pacific Research Center.

Solar radiation can be affected by factors like volcanic activity, the level of aerosols in the atmosphere and changes in the Earth's orbit around the Sun.

The study says the estimates for future rainfall are a global average, and do not apply to what is expected to happen locally.

Previous research has pointed to risks of regional flooding or water stress as climate change alters traditional winds and the amount of moisture they pick up at sea.

.


Related Links
Water News - Science, Technology and Politics






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





WATER WORLD
Old drainage ditches sleeping threat to Cape Cod salt marshes
Cape Cod MA (SPX) Jan 29, 2013
CAPE Cod, Massachusetts has a problem. The iconic salt marshes of the famous summer retreat are melting away at the edges, dying back from the most popular recreational areas. The erosion is a consequence of an unexpected synergy between recreational over-fishing and Great Depression-era ditches constructed by Works Progress Administration (WPA) in an effort to control mosquitoes. The casc ... read more


WATER WORLD
US, Europe team up for moon fly-by

Russia to Launch Lunar Mission in 2015

US, Europe team up for moon fly-by

Mission would drag asteroid to the moon

WATER WORLD
Ridges on Mars suggest ancient flowing water

Changes on Mars Caused by Seasonal Thawing of CO2

Is there life on Mars?

Opportunity At Work At Whitewater Lake

WATER WORLD
Companies prepare commercial spacecraft

NASA to recycle parts for science work

TDRS-K Offers Upgrade to Vital Communications Net

How to predict the future of technology

WATER WORLD
Reshuffle for Tiangong

China to launch 20 spacecrafts in 2013

Mr Xi in Space

China plans manned space launch in 2013: state media

WATER WORLD
NASA to Send Inflatable Pod to International Space Station

ISS to get inflatable module

ESA workhorse to power NASA's Orion spacecraft

Competition Hopes To Fine Tune ISS Solar Array Shadowing

WATER WORLD
Spacecom And Spacex Announce Agreement For Amos-6 Satellite Launch

S. Korea joins global space club with satellite launch

Russia Set for Year's First Baikonur Space Launch Feb. 5

First Ariane 5 For 2013 Ready For Loading

WATER WORLD
The Origin And Maintenance Of A Retrograde Exoplanet

New Evidence Indicates Auroras Occur Outside Our Solar System

Glitch has space telescope shut down

Earth-size planets common in galaxy

WATER WORLD
Bioinspired fibers change color when stretched

Stanford Researchers Break Million-core Supercomputer Barrier

Scientists trick iron-eating bacteria into breathing electrons instead

Demagnetization by rapid spin transport




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