LATEST UPDATES » Vol 22, No 06, June 2018 – Cancer - Therapies and strategies for better patient outcomes       » Gardasil 9 supply running short in Hong Kong       » China helps Tajikistan tackle grassland degradation       » Immuno-oncology trials in China surge more than 50 per cent       » Yeast for industrial biotechnology       » Uncontrolled hypertension in rural communities      
Difference in rainfall between wet and dry seasons is increasing worldwide
A research team led by Dr. Chia Chou at the Research Center for Environmental Changes (RCEC) recently reported observational evidence that the difference in precipitation between wet and dry seasons has increased worldwide over the past three decades. The team analyzed global precipitation data spanning 1979–2010 for changes in seasonal precipitation. They found a trend towards wet seasons becoming wetter and dry seasons becoming drier — in accordance with some climate models — and also that the trend is largely defined by an increase in precipitation during wet seasons. The study was published online in Nature Geoscience.

Global temperatures have risen over the past few decades. The water vapor content of the atmosphere has increased as a result, strengthening the global water cycle. This has led to wet regions getting wetter and dry regions getting drier. Climate model simulations suggest that similar intensification of existing patterns of rainfall may also apply to the seasonal cycle of rainfall.

In their study, the team from the RCEC analyzed regional and global trends in seasonal precipitation extremes between 1979-2010 using a number of observational data sets. They found that globally, the annual precipitation range has increased, mainly due to wetter wet seasons. Although the magnitude of the shift was not ascertainable, largely owing to limitations inherent in the data sets used, the signs of the tendency were robust. The results were consistent with climate model simulations for the same period including the results of the team's own previous study of climate model simulations. On a regional scale, the tendency for wet seasons to get wetter occurs over climatologically rainier regions and the tendency dry seasons to get drier is seen in drier regions. This implies a more extreme seasonal cycle of rainfall, occurs not only in as a global average but also on a regional scale.

Unlike global warming, changes in rainfall vary across regions, with increases in precipitation in some locations and decreases in others. This strong spatial variation means that it is difficult to accurately project future precipitation changes on a regional basis. Understanding the patterns of change in rainfall and the underlying mechanisms is a way to improve the accuracy of projection. A more extreme seasonal precipitation cycle in the future could have implications for drought and flood frequency, even if the overall amount of precipitation remains steady. These changes may have a potentially severe impact on local hydrology, and further influence the ecosystem and human society. As precipitation changes are usually evaluated from annual mean changes, seasonal changes in precipitation may have been overlooked until now.

Click here for the complete issue.

news Shire, Microsoft and EURORDIS form Global Commission to accelerate time to diagnosis for children with rare diseases
news EmTech Asia explores future of life, humanity and economy
news Biology of Ageing II - Impactful Interventions
Asia Pacific Biotech News
Click here to receive APBN e-newsletters once a month!

APBN Editorial Calendar 2018
Obesity / Outlook for 2018
Searching for the fountain of youth
Women in Science - Making a difference
Digestive health in the 21st century - Trust your guts
Dental health - The root to good health
Cancer - Therapies and strategies for better patient outcomes
Water management / Vaccination
Regenerative medicine / Biotech start ups
Digital healthcare / 3D printing
Bones / Breast cancer
Liver health / Top science research nations & institutions
AIDS / Breakthrough of the year/Emerging trends
Editorial calendar is subjected to changes.
About Us
Available issues
Editorial Board
Letters to Editor
Instructions to Authors
Advertise with Us
World Scientific Publishing Co. Pte. Ltd.
5 Toh Tuck Link, Singapore 596224
Tel: 65-6466-5775
Fax: 65-6467-7667
» For Editorial Enquiries:
   biotech_edit@wspc.com or Ms Lim Guan Yu
» For Subscriptions, Advertisements &
   Media Partnerships Enquiries:
Copyright© 2018 World Scientific Publishing Co Pte Ltd  •  Privacy Policy