Is the earth hot?
It’s hot all over.
But it’s a ‘dry’ heat.
(Phys.org) Why is Earth so dry? — With large swaths of oceans, rivers that snake for hundreds of miles, and behemoth glaciers near the north and south poles, Earth doesn’t seem to have a water shortage. And yet, less than one percent of our planet’s mass is locked up in water, and even that may have been delivered by comets and asteroids after Earth’s initial formation. Astronomers have been puzzled by Earth’s water deficiency. The standard model explaining how the solar system formed from a protoplanetary disk, a swirling disk of gas and dust surrounding our Sun, billions of years ago suggests that our planet should be a water world. Earth should have formed from icy material in a zone around the Sun where temperatures were cold enough for ices to condense out of the disk. Therefore, Earth should have formed from material rich in water. So why is our planet comparatively dry? A new analysis of the common accretion-disk model explaining how planets form in a debris disk around our Sun uncovered a possible reason for Earth’s comparative dryness. Led by Rebecca Martin and Mario Livio of the Space Telescope Science Institute in Baltimore, Md., the study found that our planet formed from rocky debris in a dry, hotter region, inside of the so-called “snow line.” The snow line in our solar system currently lies in the middle of the asteroid belt, a reservoir of rubble between Mars and Jupiter; beyond this point, the Sun’s light is too weak to melt the icy debris left over from the protoplanetary disk. Previous accretion-disk models suggested that the snow line was much closer to the Sun 4.5 billion years ago, when Earth formed. “Unlike the standard accretion-disk model, the snow line in our analysis never migrates inside Earth’s orbit,” Livio said. “Instead, it remains farther from the Sun than the orbit of Earth, which explains why our Earth is a dry planet. [Read More]
certain parts of the U.S….
Have been experiencing that ‘dry’ heat more than others.
[via HuffPo]U.S. Drought 2012: Current Drought Covers Widest Area Since 1956, According To New Data
WALTONVILLE, Ill. — The nation’s widest drought in decades is spreading, with more than half of the continental United States now in some stage of drought and most of the rest enduring abnormally dry conditions.
Only in the 1930s and the 1950s has a drought covered more land, according to federal figures released Monday. So far, there’s little risk of a Dust Bowl-type catastrophe, but crop losses could mount if rain doesn’t come soon.
In its monthly drought report, the National Climatic Data Center in Asheville, N.C., announced that 55 percent of the country was in a moderate to extreme drought at the end of June. The parched conditions expanded last month in the West, the Great Plains and the Midwest, fueled by the 14th warmest and 10th driest June on record, the report said.
Topsoil has turned dry while “crops, pastures and rangeland have deteriorated at a rate rarely seen in the last 18 years,” the report said.
The percentage of affected land is the largest since December 1956, when 58 percent of the country was covered by drought, and it rivals even some years in the Dust Bowl era of the 1930s, though experts point out that this year’s weather has been milder than that period, and farming practices have been vastly improved since then.
In southern Illinois, Kenny Brummer has lost 800 acres of corn that he grows to feed his 400 head of cattle and 30,000 hogs. Now he’s scrambling to find hundreds of thousands of bushels of replacement feed.
“Where am I going to get that from? You have concerns about it every morning when you wake up,” said Brummer, who farms near Waltonville. “The drought is bad, but that’s just half of the problem on this farm.”
Around a third of the nation’s corn crop has been hurt, with some of it so badly damaged that farmers have already cut down their withered plants to feed to cattle. As of Sunday, the U.S. Department of Agriculture said, 38 percent of the corn crop was in poor or very poor condition, compared with 30 percent a week earlier. [Read More]
Do feel bad, boos…
It’s only fair, I suppose, that we spread the ‘heat’ wealth around a bit, yes?
Sorry about that.