Fluctuations in sea-surface temperatures to the north of Australia and changes in atmospheric circulation patterns over the sub-tropical Indian Ocean have been identified as key factors leading to declining rainfalls in south-eastern Australia since 1950.
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Fluctuations in eye pressure may be associated with a decreasing peripheral field of vision in patients with glaucoma, even if their eye pressure remains low overall, according to a report in the August issue of Archives of Ophthalmology, one of the JAMA/Archives journals.
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Fluctuations in sex hormone levels during women's menstrual cycles affect the responsiveness of their brains' reward circuitry, an imaging study at the National Institute of Mental Health (NIMH), a component of the National Institutes of Health (NIH), has revealed.
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Researchers working in Australia have discovered ways in which fruit flies might react to extreme fluctuations in temperature. Short-term exposure to high heat stress ("heat hardening") has been known to have negative effects on Drosophila. But Loeschcke and Hoffmann discovered that it can have advantages too.
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The Atlantic Ocean doesn't receive the mother lode of fixed nitrogen, the building block of life, after all. Instead, comparing fathom for fathom, the Pacific and Indian oceans experience twice the amount of nitrogen fixing as the Atlantic, say researchers in the Jan. 11 issue of Nature.
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