2011年10月31日星期一

The 2011 Arctic sea ice extent maximum that marks the beginning of the melt season appears to be tie

The 2011 Arctic sea ice extent maximum that marks the beginning of the melt season appears to be tied for the lowest ever measured by satellites, say scientists at the University of Colorado Boulder's National Snow and Ice Data Center. The CU-Boulder research team believes the lowest annual maximum ice extent of 5,650,000 square miles occurred on March 7. The maximum ice extent was 463,000 square miles below the 1979-2000 average, an area slightly larger than the states of Texas and California combined. The 2011 measurements were tied with those from 2006 as the lowest maximum sea ice extents measured since satellite record keeping began in 1979.Virtually all climate scientists believe shrinking Arctic sea ice is tied to warming temperatures in the region caused by an increase in human-produced greenhouse gases being pumped into Earth's atmosphere. Because of the spiraling(盘旋的) downward trend of Arctic sea ice extent in the last decade, some CU scientists are predicting the Arctic Ocean may be ice free in the summers within the next several decades.The seven lowest maximum Arctic sea ice extents measured by satellites all have occurred in the last seven years, said CU-Boulder Research Scientist Walt Meier of the National Snow and Ice Data Center, who participated the latest study. "I'm not surprised by the new data because we've seen a downward trend in winter sea ice extent for some time now."Scientists believe Arctic sea ice functions like an air conditioner for the global climate system by naturally cooling air and water masses, playing a key role in ocean circulation and reflecting solar radiation back into space, said Meier. In the Arctic summer months, sunlight is absorbed by the growing amounts of open water, raising surface temperatures and causing more ice to melt."I think one of the reasons the Arctic sea ice maximum extent is declining is that the autumn ice growth is delayed by warmer temperatures and the ice extent is not able to 'catch up' through the winter," said Meier. "In addition, the clock runs out on the annual ice growth season as temperatures start to rise along with the sun during the spring months."Since satellite record keeping began in 1979, the maximum Arctic sea ice extent has occurred as early as Feb. 18 and as late as March 31, with an average date of March 6. Since the CU-Boulder researchers determine the maximum sea ice extent using a five-day running average, there is small chance the data could change.In early April CU-Boulder's National Snow and Ice Data Center will issue a formal announcement on the 2011 maximum sea ice extent with a full analysis of the winter ice growth season, including graphics comparing 2011 to the long-term record.

God knew that Adam would one day require someone to locate

10. God worried that Adam would frequently become lost in the garden because he would not ask for directions. 9. God knew that Adam would one day require someone to locate and hand him the TV remote. 8. God knew that Adam would never go out and get himself a new fig leaf when his seat wore out and would, therefore, need Eve to go get one for him. 7. God knew that Adam would never be able to make a doctor's, dentist, or haircut appointment for himself. 6. God knew that Adam would never be able to remember which night to put the garbage on the curb. 5. God knew that if the world was to be populated, men would never be able to handle the pain and discomfort of childbearing. 4. As "Keeper of the Garden," Adam would never remember where he left his tools. 3. Apparently, Adam needed someone to blame his troubles on when God caught him hiding in the garden. 2. As the Bible says, "It is not good for man to be alone!" And finally, the number ONE reason that God created Eve... 1. When God finished the creation of Adam, He stepped back, scratched His head, and said, "Ok, I can do better than THAT!".

2011年10月17日星期一

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