HOME >> BIOLOGY >> NEWS
Haze dynasty

China has darkened over the past half-century. Where has all the sunshine gone? The usual suspect, at least to a climatologist, would be cloud cover.

But in the most comprehensive study to date of overcast versus cloud-free days in China, a team led by the Department of Energy's Pacific Northwest National Laboratory, reporting in the current advance online issue of Geophysical Research Letters, has found that cloud cover has been decreasing for the past 50 years.

Eliminating clouds from the dimming equation now leaves little doubt that human activity, in the form of a nine-fold increase in fossil fuel emissions over the same half-century period, has entrenched China in a foggy haze that absorbs and deflects the sun's rays.

For the study, PNNL senior research scientist and lead author Yun Qian and colleagues surveyed records from more than 500 weather stations across China for the years 1954 to 2001. To remove the subjectivity and ambiguity of "partly cloudy" reports, they consulted only records of an either/or nature--cloud-free and overcast days. Their statistical analysis noted a clear trend: overcast days decreased .78 percent each decade while cloud-free days increased .6 percent for the same period.

The results, said co-author Ruby Leung, a PNNL laboratory fellow, "strongly suggest that increasing aerosol concentrations (particles, mainly soot and sulfur, that pollute the air) in the past has produced a fog-like haze that has reduced solar radiation (surface heat from sunshine), despite more frequent clear days that should lead to increased solar radiation."

In fact, a report in Science last year showed that most of the planet's surface is brightening, attributable to air-pollution regulation throughout most of the industrialized world. The report even showed a curious blip in surface brightness in China in the mid-90s, Leung noted. "Our results showed a similar trend in the mid-90s, consistent with the Science paper. <
'"/>

Contact: Bill Cannon
cannon@pnl.gov
509-375-3732
DOE/Pacific Northwest National Laboratory
17-Jan-2006


Page: 1 2

Related biology news :

1. Antioxidant overload may underlie a heritable human disease
2. Unexpected link between gene in liver and iron overload
3. Fat kills cancer
4. DNA analysis suggests under-reported kills of threatened whales
5. Anti-fungal drug kills TB bug
6. Ebola-outbreak kills 5000 gorillas
7. HIV-1 kills immune cells in the gut that may never bounce back
8. Scientists design a PSA-activated protoxin that kills prostate cancer
9. The LouseBuster kills
10. Experimental RNA-based drug kills prostate cancer cells effectively and safely
11. Newly discovered protein kills anthrax bacteria by exploding their cell walls

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:7/18/2020)... TORONTO (PRWEB) , ... July 17, 2020 , ... Commercial ... hangs on pharma’s ability to discover a COVID cure or vaccine, the global economic ... competitive and price pressure is not going away and capturing full value from every ...
(Date:7/4/2020)... ... 2020 , ... Aesthetics Biomedical (ABM), a leading aesthetics product ... only the products and treatments developed, but also the dedicated team behind the ... brands built by ABM have received several honors already for 2020, each of ...
(Date:7/1/2020)... ... July 01, 2020 , ... ... had completed the purchase of Teva-Takeda Pharmaceuticals’ packaging facility in Minakuchi, located in ... Japanese clinical supply facility located in Kakegawa, the new 60,000-square-foot facility will provide ...
Breaking Biology News(10 mins):
(Date:8/12/2020)... Mass. (PRWEB) , ... August 11, 2020 , ... ... $300,000 a year to expand the Facioscapulohumeral Muscular Dystrophy Clinical Trial Research ... in 2021 and 2022. The network is a consortium of academic research centers ...
(Date:8/3/2020)... ... August 03, 2020 , ... Introducing Ardent Animal Health ... growth, , Known as MediVet Biologics since its formation in ... The new Ardent Animal Health will build on its base of innovative therapies ...
(Date:7/31/2020)... and SOMERSET, N.J (PRWEB) , ... July 29, ... ... genome editing company, and Catalent, the leading global provider of advanced delivery technologies, ... health products, today announced that they have entered into a strategic partnership whereby ...
(Date:7/18/2020)... , ... July 16, 2020 , ... After research model ... completion of a great surgery is only the beginning of a successful study, while ... community. , Join Brad Gien, Global Head of Surgery from Envigo in ...
Breaking Biology Technology:
Cached News: