Monthly Archives: May 2014
The turbines on wind farms convert the kinetic energy of the wind into electricity. So, we might expect to see some changes in the region due to this energy conversion. The impact will be a function of how big the wind farm is and how long the turbines operate.
One way to estimate changes is through observations. The best method is to compare the observation of a region before and after wind farms are installed. Unfortunately, there are rarely enough observations before the wind farm installation to make strong conclusions about any observed relationships. Continue reading
The growing season is often defined as the number of days between the last time the temperature was 32 degrees in spring and the first time the temperature falls to 32 in fall.
The latest frost in spring is important to gardeners as they seek to plant after a long winter, and for most plants it is wise to do so when the temperatures are likely to remain warmer than 32 degrees.
Since 1958, a continuous measurement of the carbon dioxide content of the atmosphere has been made at Mauna Loa Observatory in Hawaii. These observations were initiated by Charles Keeling, who died in 2005, and have been maintained by his son Ralph ever since.
Sunshine is a manifestation of solar radiation and when it is absorbed by the surface of the Earth, the surface heats up and emits a different kind of radiation, known as infrared radiation. Carbon dioxide is a special chemical in that it is transparent to solar radiation and yet it absorbs infrared radiation. Thus, the presence of carbon dioxode in our atmosphere allows sunshine to penetrate to the surface but inhibits the emission of infrared radiation to space.
Pretty good forecast last week, wasn’t it? Though last week’s persistent cloudiness and intermittent rain was almost surely met with derision by all, it is hard to imagine that many people were surprised by it, as the forecasts very accurately … Continue reading