This is revealed by an international study conducted with support from the University of Gothenburg, Sweden. There is a risk that the consequences will be increased drought, reduced harvests and poorer public health.
China's dramatic growth has also brought about an increase in environmental problems. At the same time as the population has more than doubled during the last century, emissions into the atmosphere have increased by 800 percent. The environmental impact has been particularly pronounced in eastern China, where most of the people live and where the emissions are greatest: it does not rain in the same way as it did before.
In some parts of eastern China the number of days with rain has diminished by 23 percent in 50 years. The consequences are increased drought and poorer harvests. A team of climate researchers from the USA, China and Sweden - including Deliang Chen, Professor of Physical Meteorology in the Department of Earth Sciences, University of Gothenburg - has now studied the problem and demonstrated that the reduced amounts of rainfall have a direct connection with high concentrations of air pollution.
According to the researchers, the failure of rain to appear has a direct link to the concentrations of aerosol in the atmosphere. Researchers have long been aware that aerosol, which consists of small particles surrounded by gas and water, has the capacity to "gather" raindrops around it in clouds. However, in the current study the researchers discovered that where there was a high aerosol content, the raindrops were considerably smaller - in some cases only half the normal size. As it is more difficult for smaller raindrops to coalesce into rain clouds that can release rain, the air pollution thus leads to the reduction in light rainfall (under 10 millimetres).
The study, which is based on data from 162 weather stations, is published in the Journal of Geophysical Research. http://www.agu.org/pubs/crossref/2009/2008JD011575.shtml
Helena Aaberg | idw
Invasive Insects Cost the World Billions Per Year
04.10.2016 | University of Adelaide
Malaysia's unique freshwater mussels in danger
27.09.2016 | The University of Nottingham Malaysia Campus
Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.
This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...
Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion
Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
25.10.2016 | Earth Sciences
25.10.2016 | Power and Electrical Engineering
25.10.2016 | Process Engineering