Navigation Links
Current pledges put over 600 million people at risk of higher water scarcity
Date:9/12/2013

Our current pledges to reduce greenhouse gas emissions, which are projected to set the global mean temperature increase at around 3.5C above pre-industrial levels, will expose 668 million people worldwide to new or aggravated water scarcity.

This is according to a new study published today, 13 September, in IOP Publishing's journal Environmental Research Letters, which has calculated that a further 11 per cent of the world's population, taken from the year 2000, will live in water-scarce river basins or, for those already living in water-scarce regions, find that the effects will be aggravated.

The results show that people in the Middle East, North Africa, Southern Europe and the Southwest of the USA will experience the most significant changes.

The results show that if the global mean temperature increases by 2C the internationally agreed target then eight per cent of the world population (486 million people) will be exposed to new or aggravated water scarcity, specifically in the Near and Middle East.

Lead author of the research Dr Dieter Gerten, from the Potsdam Institute for Climate Impact Research, said: "Our global assessments suggest that many regions will have less water available per person.

"Even if the increase is restricted to 2C above pre-industrial levels, many regions will have to adapt their water management and demand to a lower supply, especially since the population is expected to grow significantly in many of these regions."

"The unequal spatial pattern of exposure to climate change impacts sheds interesting light on the responsibility of high-emission countries and could have a bearing on both mitigation and adaption burden sharing."

According to Dr Gerten, the main driver of new or aggravated water scarcity is declining precipitation; however, increased temperatures will also lead to an increase in evapotranspiration of water and, thus, decrease the resources.

The anticipated increase in population will have even stronger effects on the ratio of water demand and water availability in some regions.

To assess the impacts of different mean global warming levels, the international group of researchers combined existing simulations from 19 climate change models with eight different global warming trajectories. The latter ranged from 1.5C to 5C increases above pre-industrial levels, resulting in a total of 152 climate change scenarios that were examined.

In addition to water shortages, the researchers assessed the impact that future climatic changes may have on global terrestrial ecosystems. They sought to discover what areas will be affected by strong ecosystem changes, and whether these areas are rich in biodiversity and/or contain unique species.

"At a global warming of 2C, notable ecosystem restructuring is likely for regions such as the tundra and some semi-arid regions. At global warming levels beyond 3C, the area affected by significant ecosystem transformation would significantly increase and encroach into biodiversity-rich regions," continued Dr Gerten.

"Beyond a mean global warming of 4C, we show with high confidence that biodiversity hotspots such as parts of the Amazon will be affected."


'/>"/>

Contact: Michael Bishop
michael.bishop@iop.org
01-179-301-032
Institute of Physics
Source:Eurekalert

Related biology news :

1. Current efforts will not save the worlds most endangered cat
2. Chapman University unearths data in animal habitat selection that counters current convention
3. Ocean plankton sponge up nearly twice the carbon currently assumed
4. Education resource focuses on teaching population genetics using current research
5. Second most common infection in the US proving harder to treat with current antibiotics
6. CRN assesses current state of scientific research for nutritional supplements
7. ACRG and BGI report findings from genomics research on recurrent hepatitis B virus integration
8. Launch of PLoS Currents: Disasters
9. Current water resources in Europe and Africa
10. Italy pledges to be part of ELIXIR research infrastructure
11. Wistar receives $1.5 million Department of Defense grant to ready prostate drug for clinical use
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/11/2017)... 11, 2017  Michael Johnson, co-founder of Visikol Inc. a company ... has been named to the elite "Forbes 30 Under 30" list ... 600 people in 20 fields nationwide to be recognized as a ... applicants were selected. ... He is currently a PhD candidate at Rutgers University. ...
(Date:1/6/2017)... 5, 2017  Delta ID Inc., a leader in ... for automotive at CES® 2017. Delta ID has collaborated ... demonstrate the use of iris scanning as a secure, ... driver in a car, and as a way to ... Delta ID and Gentex will demonstrate (booth ...
(Date:1/3/2017)... 2017 Onitor, provider of digital health technology ... an innovative biometric data-driven program designed to aid weight ... the 2017 Consumer Electronics Show (CES) in ... U.S., the World Health Organization (WHO), have identified lifestyle ... who are overweight or obese. WHO also states that ...
Breaking Biology News(10 mins):
(Date:1/19/2017)... ... January 19, 2017 , ... ... the full spectrum of drug and device development, and Prism Clinical Research ... and clinicians, today announced Verified Clinical Trials (VCT) has been selected ...
(Date:1/19/2017)... BETHESDA, Md. , Jan. 18, 2017  Northwest ... company developing DCVax® personalized immune therapies for operable and ... Marnix Bosch , Chief Technical Officer of NW Bio, ... Thursday, January 19, 2017, at the Hyatt Regency Hotel ... Dr. Bosch will chair the session entitled "New Therapeutic ...
(Date:1/19/2017)... Jan. 18, 2017 BD (Becton, Dickinson and Company) (NYSE: ... that it will host a live webcast of its Annual Meeting ... The webcast can be accessed from the BD ... through Tuesday, January 31, 2017. ... About BD BD is a global medical ...
(Date:1/18/2017)... According to a new market research report "In situ Hybridization Market by Technique ... Diagnostic Laboratories, Academic and Research Institutions) - Global Forecast to 2021" published by ... USD 557.1 Million in 2016, growing at a CAGR of 5.8%. ... ... MarketsandMarkets Logo ...
Breaking Biology Technology: