Subscribe to our free daily newsletters
. Earth Science News .

Subscribe to our free daily newsletters

Why did rainfall over Asian inland plateau region undergo abrupt decrease around 1999
by Staff Writers
Beijing, China (SPX) Mar 09, 2017

(a) Differences in geopotential height at 200 hPa between 1999-2007 (T2) and 1971-2000 (TClim) (units: gpm). Gray shading indicates that the differences are significant above the 90% confidence level, based on the Student's t-test. (b) As in (a), but for 500 hPa. (c) As in (a), but for 850 hPa. Contour intervals are 5 gpm in (a, b) and 2 gpm in (c). Image courtesy (Piao et al., 2017) published in Advances in Atmospheric Sciences.

The Asian inland plateau (AIP) is located in the East Asian monsoon marginal areas and mainly includes Mongolia and part of northern China. Covering arid and semi-arid regions, the climate variability of the AIP is complex and can have profound impacts on economic and social activities.

Recently, scientists from the Institute of Atmospheric Physics worked with Korean and Russian scientists on the summer rainfall over the AIP region. They found an interdecadal change around 1998/99, with a rainfall decrease of about 16% of the climatological amount.

Since rainfall plays a crucial role in drought conditions, this abrupt rainfall decrease significantly influenced the regional drought situation over the AIP. Time series of three drought indices all shift from positive to negative in 1999, indicating an exacerbation of the drought conditions.

The driving factor for this interdecadal change is suggested to be a quasi-zonal wave-like pattern over the Eurasian continent. During 1999-2007, positive geopotential anomalies were located over Eastern Europe and the AIP, with negative anomalies over Western Europe and Central Asia.

This teleconnection pattern, together with anticyclonic circulation over the AIP, was responsible for the decrease in summer AIP rainfall.

The study further indicates that the warming SST anomalies over the North Atlantic could have excited the teleconnection pattern over the Eurasia, resulting in the rainfall decrease over the AIP and worsening the drought conditions there.

Research paper

Syrian farmers fear IS to flood villages near Euphrates
Tuwayhina, Syria (AFP) March 5, 2017
Syrian farmers near the Euphrates river are terrified the Islamic State group will literally open the floodgates to defend its stronghold Raqa, drowning their tiny villages in the process. Water levels of the Euphrates, which snakes down through northern Syria and east into Iraq, have shot up over the past month near the jihadist group's de facto capital, Raqa city. Residents of the mod ... read more

Related Links
Institute of Atmospheric Physics, Chinese Academy of Sciences
Water News - Science, Technology and Politics

Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Contributor
$5 Billed Once

credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly

paypal only

Comment on this article using your Disqus, Facebook, Google or Twitter login.

Share this article via these popular social media networks DiggDigg RedditReddit GoogleGoogle

War-scarred Syrian children may be 'lost to trauma': aid group

Jihadist tunnels save Assyrian winged bulls of Mosul

U.S. Air Force retires first HC-130 search and rescue aircraft

115 migrants rescued, 25 missing: Libya navy

Coffee-ring effect leads to crystallization control

3-D printing with plants

Researchers remotely control sequence in which 2-D sheets fold into 3-D structures

Scientists demonstrate improved particle warning to protect astronauts

Sea of Galilee water level lowest in century: official

Massive Hong Kong shark fin seizure as ban flouted

Syrian farmers fear IS to flood villages near Euphrates

More bang for the buck

Is Arctic sea ice doomed to disappear?

NASA study improves forecasts of summer Arctic sea ice

UN reports Antarctica's highest temperatures on record

Air pollution may have masked mid-20th Century sea ice loss

Hand-picked specialty crops 'ripe' for precision agriculture techniques

Colombia's 'drug triangle' puts hope in chocolate

Hand-picked specialty crops 'ripe' for precision agriculture techniques

Researchers propose using CRISPR to accelerate plant domestication

Southern California fault systems capable of magnitude 7.3 earthquakes

Three killed as cyclone Enawo batters Madagascar

Powerful aftershock hits quake-stricken Philippine city

Zimbabwe seeks aid after floods kill over 240 in 3 months

PM hails Ben Guerdane battle as Tunisia 'turning point'

11 Malian soldiers killed in attack on border base

Senegal and Gambia announce new era of ties

Mozambique truce extended by two months

Dartmouth study finds modern hunter-gathers relocate to maximize foraging efficiency

100,000-year-old human skulls from east Asia reveal complex mix of trends in time, space

Catalog of 208 human-caused minerals bolsters argument to declare 'Anthropocene Epoch'

Mothers dictate lifelong grooming habits in chimps

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

The content herein, unless otherwise known to be public domain, are Copyright 1995-2017 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news 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. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. 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