【粤镀】遛粤粤镀机警整理（截止7月2日9:14,更新至70只狗）【结贴】

heroliuyuchen

顶！！！1

lxie0228

必须支持搂住的精华森我开心拉链拉

morsewang

辛苦辛苦了

ryan9476

rdrdrdrrdrd

lumolumolumo

茗茗m

Jinny123 发表于 2013-6-6 14:27
元叔太快了哈哈哈哈哈哈

亲，有篇测量误差的原文，昨天狗主也看过了，确认是原文。。。怎么发给你呢？？？

茗茗m

60-Year-Old Bias in Data on Sea Temperatures
Every scientist knows about measurement bias, the systematic errors that can creep into data. A simplistic example would be a metal ruler that gives inaccurate readings when it expands in warmer temperatures.
Avoiding measurement bias can be impossible. Nobody’s perfect, after all, and neither is equipment. What’s important is recognizing bias and taking it into account when working with the data.
But it is not always easy to detect bias. A case in point is being reported in Nature, where researchers have uncovered measurement bias in six-decades-old data on global surface temperatures.地表温度 The problem arises from how British and American ships measured the temperature of surface water. 地表水温度
David W. J. Thompson of Colorado State University and colleagues analyzed global mean surface temperatures from the 1880s to the present, tweaking the data to remove the effects of El Niño and other “weather noise,” as Dr. Thompson described it. They discovered a sudden drop of 0.5 degree Fahrenheit in 1945, but just in data collected at sea, not on land — a hint 线索that the drop might have something to do with the measurements.
At that time, British and American ships did much of the logging记录 of sea temperatures worldwide. On British ships, crews同事 measured the temperature of seawater collected in a bucket（水桶）. But since about 1939, most American ships had switched to measuring the temperature of seawater as it was drawn through an intake pipe进水道 for use as an engine coolant（冷冻剂,冷却液,散热剂）. Because of heat from the engine room, American measurements were generally higher.
After looking more closely at the data, Dr. Thompson said, they realized what had happened. Most of the wartime（战时） data came from American ships, with just 20 percent of the readings from British ones. But starting in August 1945, there was an abrupt switch. Nearly half the readings came from British ships. Because those readings are generally colder, Dr. Thompson said, that accounts for the sudden temperature drop.
Now that the bias has been recognized, climate researchers will need to take it into account in their models and simulations. But Dr. Thompson said the long-term trend, toward higher temperatures, would not be affected.

fishmouse5757

顶起~~~~

Jinny123

茗茗m 发表于 2013-6-28 08:31
60-Year-Old Bias in Data on Sea Temperatures
Every scientist knows about measurement bias, the syst ...

感谢呀呀呀~~~~~~~我整理进去

Meinong

多谢！求七月九号还没还题！