Featured Research

from universities, journals, and other organizations

Land Surface Evaporation Increased During The Second Half Of The 20th Century

Date:
November 8, 2006
Source:
American Geophysical Union
Summary:
New research shows through a mathematical model how lower pan evaporation rates actually indicate higher terrestrial evaporation, in spite of global dimming. Thus, while global dimming had an effect, it was not strong enough to cause a negative trend in evaporation where pan evaporation had been observed to decrease.

Evaporation from pans has been decreasing over many areas of the world for the past half century, but the significance of this trend is under debate.

Related Articles


Though some speculate that decreases in pan evaporation result from well-documented "global dimming," where less solar irradiance reaches the ground, others hypothesize a complementary relationship between pan evaporation and actual evaporation.

For example, in arid climates, terrestrial evaporation is low. However, water in pans left out in this environment can evaporate huge amounts of water. By contrast, water in pans left out in a more humid environment due to increased precipitation will tend to lose less water because of the ambient humidity.

In an article in a recent issue of the journal Geophysical Research Letters, Wilfried Brutsaert, of the School of Civil and Environmental Engineering, Cornell University, shows through a mathematical model how lower pan evaporation rates actually indicate higher terrestrial evaporation, in spite of global dimming.

Thus, while global dimming had an effect, it was not strong enough to cause a negative trend in evaporation where pan evaporation had been observed to decrease. Based on this, he suggests that the hydrologic cycle is accelerating in those areas.

Source: Geophysical Research Letters (GRL) paper 10.1029/2006GL027532, 2006


Story Source:

The above story is based on materials provided by American Geophysical Union. Note: Materials may be edited for content and length.


Cite This Page:

American Geophysical Union. "Land Surface Evaporation Increased During The Second Half Of The 20th Century." ScienceDaily. ScienceDaily, 8 November 2006. <www.sciencedaily.com/releases/2006/11/061106164855.htm>.
American Geophysical Union. (2006, November 8). Land Surface Evaporation Increased During The Second Half Of The 20th Century. ScienceDaily. Retrieved January 28, 2015 from www.sciencedaily.com/releases/2006/11/061106164855.htm
American Geophysical Union. "Land Surface Evaporation Increased During The Second Half Of The 20th Century." ScienceDaily. www.sciencedaily.com/releases/2006/11/061106164855.htm (accessed January 28, 2015).

Share This


More From ScienceDaily



More Earth & Climate News

Wednesday, January 28, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Scientists Say Earliest Snakes Lived Alongside The Dinosaurs

Scientists Say Earliest Snakes Lived Alongside The Dinosaurs

Newsy (Jan. 28, 2015) Wrongly categorized as lizard fossils, snake fossils now show the reptile could have developed earlier than we thought — 70 million years earlier. Video provided by Newsy
Powered by NewsLook.com
Time Lapse: Sculptures Created from 30 Tons of Snow

Time Lapse: Sculptures Created from 30 Tons of Snow

Rumble (Jan. 28, 2015) Students in North Finland use 30 tons of snow and one ton of ice to build a massive photography display and sculpture installation. Five days of work condensed into a one-minute time lapse! Video provided by Rumble
Powered by NewsLook.com
Aquaponics Turn Suburban Industrial Park Into Farmland: Hume

Aquaponics Turn Suburban Industrial Park Into Farmland: Hume

The Toronto Star (Jan. 27, 2015) Ancient techniques of growing greens with fish and water are well ahead of Toronto bylaws. Video provided by The Toronto Star
Powered by NewsLook.com
Madagascar Locust Plague Could Mean Famine For Millions

Madagascar Locust Plague Could Mean Famine For Millions

Newsy (Jan. 27, 2015) The Food and Agriculture Organization says millions could face famine in Madagascar without more funding to finish locust eradication efforts. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins