Sentences with phrase «measured during the past century»

These transition zones have historically fluctuated in response to rainfall changes (Hiernaux and Turner, 2002), in the clearest example of multi-decadal variability measured during the past century (Hulme, 2001).

Not exact matches

Although the measured speed of light has decreased only about 1 % during the past three centuries, the decrease is statistically significant, because measurement techniques can detect changes thousands of times smaller.

After improving steadily for half a century, the health of American children as measured by key indicators began to deteriorate during the past decade, according to a report released last week.

Since 1993, when satellites first began to measure sea - level rise, the rate of increase has been about 1 ft / century, though there has been no statistically - significant sea - level rise during the past three years.

Sensors on satellites have measured the sun's output with great accuracy and found no overall increase during the past half century.

In fact, if humankind was really as dumb as the fans of DPS would have us believe, we wouldn't be around today to hear their doomsaying, because Homo sapiens would have been wiped out during vastly larger environmental swings (in and out of ice ages, for example) in our past, than those expected as a consequence of the burning of fossil fuels to produce the energy that powers our world — a world in which the human life expectancy, perhaps the best measure of our level of «dumbness» or «smartness» — has more than doubled over the last century and continues to grow ever longer.

A question that gets a lot of attention is whether you should try to tune your model to be consistent with the evolution of global mean temperatures (GMT) over the past century, or if you should withhold that particular iconic data set during model development, justifying its use as a measure of model quality.