太阳正异常安静,摩天登录可能正在进入低日照的极限

2020年05月19日

来源:摩天登录国际教育服务

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太阳进入了一个异常安静的时期,表面上出现的黑子数量异常少。这种活动水平太低了,一些科学家建议摩天登录可能正在进入一个“严重的”日照最低峰,甚至可能是一个“极端最低峰”,其最后一次发生在17世纪,恰逢小型冰河时代。

太阳活动有一个11年的周期,其活动在此过程中起伏不定。这是由于其磁场的增强和减弱引起的。最高活动点称为太阳最大值,其特征是表面上出现更多的黑子。太阳最低点是活动减少的地方,黑子的出现要少得多。最近的太阳最高峰在2014年达到顶峰。

去年4月,美国国家海洋与大气管理局的科学家预测即将到来的最低日照将与上一个周期相似。 Space Systems Research Corp.公司的太阳物理学家Lisa Upton博士在一份声明中说,下一个太阳周期将与上一个非常相似,它具有“长久而严重的日照最小值”。但是,她还说,“没有迹象表明”摩天登录正在接近最后一个“极其小”的日照极小值。

根据SpaceWeather.com网站的数据,今年到目前为止,已经有104天没有太阳黑子出现在太阳表面。在整个2019年,共有281天没有黑子的日子。正如该网站所指出的那样,由于缺乏太阳活动,日照已达到最低。它说:“今年到目前为止,太阳活动已经有百分之七十六的时间是一片空白,这一速度在太空时代之前仅发生过一次。” “在2019年,太阳有77%的时间是空白。连续两年创纪录,确实使太阳极小值变得非常严重。”

The sun has entered an unusually quiet period, with the number of sunspots appearing on the surface unusually low. This level of activity is so low, some scientists have suggested we may be entering a "deep" solar minimum, and potentially even a Grand Minimum—the last of which took place in the 17th century and coincided with a mini ice age.

The sun has an 11-year cycle where activity waxes and wanes. This is caused by the strengthening and weakening of its magnetic field. The point when activity is highest is known as the solar maximum, which is characterized by more sunspots appearing on the surface. The solar minimum is where activity falls, and far fewer sunspots appear. The last solar maximum peaked in 2014.

In April last year, scientists at the National Oceanic and Atmospheric Administration predicted the forthcoming solar minimum would be similar to the last cycle. In a statement, Lisa Upton, Ph.D., solar physicist with Space Systems Research Corp, said the next solar cycle would be much like the last, with a weak maximum and a "long, deep minimum." However, she also said there was "no indication" we are approaching a solar minimum in line with the last Grand Minimum—known as the Maunder Minimum.

So far this year, there have been 104 days where no sunspots have appeared on the sun's surface, according to SpaceWeather.com. Across the whole of 2019, there were 281 sunspot-free days. As the website notes, the lack of activity on the sun suggests the solar minimum is taking place. "So far this year, the sun has been blank 76 percent of the time, a rate surpassed only once before in the Space Age," it said. "Last year, 2019, the sun was blank 77 percent of the time. Two consecutive years of record-setting spotlessness adds up to a very deep Solar Minimum, indeed."

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