Rice yields falling under global warming

Global warming is cutting rice yields in many parts of Asia, according to research, with more declines to come.

Yields have fallen by 10-20% over the last 25 years in some locations.

The group of mainly US-based scientists studied records from 227 farms in six important rice-producing countries such as Thailand, Vietnam, India and China.

This is the latest in a line of studies to suggest that climate change will make it harder to feed the world's growing population by cutting yields.

Climate Change is such an obvious phenomenon now, with so much evidence clearly showing that the climate is changing and that we will have to adapt accordingly, that you have to wonder why people still want to argue.

On the one hand it is all us, we are the ones changing the climate and we should do everything in our power to slow the process down giving us more time to develop solutions that will ensure that ourselves and/or as many species as possible don't become extinct as a direct result of our actions.

Or; if it isn't us and the climate change is instead a direct result of natural changes, ice age cycles, volcanic dust clouds, etc. then surely it makes even more sense for us to start making the necessary changes to our technologies and resource use to ensure that we don't exacerbate these changes with our own man-made causes. Ultimately giving us more time to develop solutions that will ensure that ourselves and/or as many species as possible don't become extinct as a result of our actions.

Sigh.

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Plankton decline across oceans as waters warm

The amount of phytoplankton - tiny marine plants - in the top layers of the oceans has declined markedly over the last century, research suggests.

Writing in the journal Nature, scientists say the decline appears to be linked to rising water temperatures.

They made their finding by looking at records of the transparency of sea water, which is affected by the plants.

The decline - about 1% per year - could be ecologically significant as plankton sit at the base of marine food chains.

This is the first study to attempt a comprehensive global look at plankton changes over such a long time scale.

"What we think is happening is that the oceans are becoming more stratified as the water warms," said research leader Daniel Boyce from Dalhousie University in Halifax, Nova Scotia, Canada.

"The plants need sunlight from above and nutrients from below; and as it becomes more stratified, that limits the availability of nutrients," he told BBC News.

Phytoplankton are typically eaten by zooplankton - tiny marine animals - which themselves are prey for small fish and other animals.

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Study examines scientists' 'climate credibility'

Some 98% of climate scientists that publish research on the subject support the view that human activities are warming the planet, a study suggests.

It added there was little disagreement among the most experienced scientists.

But climate sceptics questioned the findings, saying that publication in scientific journals was not a fair test of expertise.

The findings have been published in the journal Proceedings of the National Academy of Sciences.

The study's authors said they found "immense" differences in both the expertise and scientific prominence of those who supported the "primary tenets" of latest assessments made by the Intergovernmental Panel on Climate Change (IPCC) and those who were sceptical of the IPCC's findings.

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Bill Gates pays for ‘artificial’ clouds

The first trials of controversial sunshielding technology are being planned after the United Nations failed to secure agreement on cutting greenhouse gases.

Bill Gates, the Microsoft billionaire, is funding research into machines to suck up ten tonnes of seawater every second and spray it upwards. This would seed vast banks of white clouds to reflect the Sun’s rays away from Earth.

The British and American scientists involved do not intend to wait for international rules on technology that deliberately alters the climate. They believe that the weak outcome of December’s climate summit in Copenhagen means that emissions will continue to rise unchecked and that the world urgently needs an alternative strategy to protect itself from global warming.

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