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让我来澄清我真的问:想象一下,不管是什么原因,气象学家和地球科学家决定重新考虑季节的定义————从头定义基于当前最好的科学(有点像天文学家被迫做什么只要(行星的定义)(https://en.wikipedia.org/wiki/IAU_definition_of_planet)。基于我们目前最好的科学,它意义识别冬季/弹簧边界作为最后的日期平流层变暖吗?或有其他的考虑更重要————可以说是更科学意义随着冬天春天/ demarcators吗?我的问题不是关于季节的概念的历史,语言学。我当然意识到最后的概念变暖最近才被发现的,在季节的概念已经存在了几千年。我问* * * *的科学定义,可以改变随着科学的进步(例如冥王星作为行星曾经是机密,现在不是)。(对我的问题不是很重要,但:如果科学开始说这是新定义,媒体开始报道,最终甚至公众会意识到它。说到这里——是的,对不起,这是主题,但有人有任何猜测为什么*不*主要媒体报告的日期极地漩涡分手,不管季节的定义?毕竟,公众现在相当意识到极地漩涡,它最近被指责为很多冷法术。)* * * *背景根据维基百科文章突然平流层变暖,平流层的>辐射周期意味着冬季>平均流量是西风,在夏天它是伊斯特利(西)。>最终变暖发生这种转变,所以,极地漩涡>风改变方向的变暖,但是不改变>直到那年冬天。 This is because the stratosphere has > entered the summer easterly phase. It is final because another warming > cannot occur over the summer, so it is the final warming of the > current winter. Similarly, a [NASA-affiliated source](http://ozonewatch.gsfc.nasa.gov/facts/warming_NH.html) says that > The final warming is the last stratospheric warming of the season. > After this warming, the stratosphere never recovers to its previous > state and the vortex breaks up and dissipates. The final warming often > occurs in March or April. Sometimes the stratosphere never recovers > from what would otherwise be a mid-winter major warming in January or > February, and that warming becomes the final warming. As far as I understand it, once the polar vortex breaks up, one cannot have sudden large temperature dips (like we are having in the northeastern part of the US [this weekend of April 2-3, 2016](http://nymag.com/daily/intelligencer/2016/03/polar-vortex-is-visiting-nyc-this-weekend.html)). Thus it would seem that the date of final warming is a good candidate for the official date of the end of "meteorological winter". However, NOAA defines seasons according to calendar months (see [here](http://www.ncdc.noaa.gov/news/meteorological-versus-astronomical-summer%E2%80%94what%E2%80%99s-difference)). Meanwhile, the Swedes define the start of spring as "when the average daytime temperature exceeds zero degrees Celsius on seven consecutive days" (see [here](http://www.thelocal.se/20090313/18200)). So: purely on the basis of current best science, would it make sense to define the end of winter as the date of the final warming? Yes, one could not know that it happened until some time after it happened, but my understanding is that this lag is on the order of days, not weeks. Yes, such a definition would have the consequence that some years, meteorological winter would end in January. But, so what? Some winters do seem to end in January... while the present one lasts into April. Yes, one cannot define the demarcation between the spring and summer or summer and fall using the polar vortex as a reference. But, so what? There is no reason why each demarcation couldn't be a separate story. Even the fall/winter boundary need not necessarily be defined as the date of the formation of the polar vortex. (And while we're at it--and I know this is off topic, but still---why don't the media report the date of the breakup of the polar vortex? It seems it would be of interest to people, given the notoriety the concept has received especially the last couple of winters... In fact, is the date reported anywhere?)

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\ begingroup美元因为直到最近(历史上),科学甚至不知道有一个平流层或极地漩涡。事实上,我怀疑大多数不了解极地漩涡现在,我不会打赌在大多数能够定义平流层。你甚至不能发现他们没有复杂的现代工具,同时可以准确地确定冬至、春分和秋分如一个圆的恰当地放置石头。 \ endgroup美元
- - - - - -jamesqf
2016年4月3日在21
\ begingroup美元如同大多数术语的定义,我认为这只是一种方便的统计、通信、传统等。这个问题是相关的。 \ endgroup美元
- - - - - -马特·霍尔
2016年4月3日在33
\ begingroup美元 @jamesqf谢谢你的评论。我现在处理它(新)介绍段我的问题。 \ endgroup美元
- - - - - -linguisticturn
2016年4月3日13:48
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\ begingroup美元你问它为什么不是大多数人如何定义季节(公平的问题),而不是我是否认为这是一个好主意(这个网站的主题)。 \ endgroup美元
- - - - - -马特·霍尔
2016年4月3日14:08
1

\ begingroup美元做分析,写论文,提交,审核,并公布,然后看看会发生什么。 \ endgroup美元
- - - - - -安迪·克利夫顿
2016年4月3日15:15

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