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云图
2022-07-24 23:31:00 【张春成】
云图
最近科研圈出了个大事,就是一度非常火热的老年痴呆与一种知名蛋白沉淀之间的关联指控是数据造假的结果。
简单来说,它等价于这样一种行为,就是我可以通过各种 CG 方法生成一张图,然后把这张图给地球披上,然后指着它说,看吧,这就是之后 30 年的地球气候的云图。
虽然这张图实际上没有一点儿意义。
开局一张图
比如生成这样一张图,它可以是普通的噪声图,唯一的要求是它是连续变化的


接下来,对它进行一些操作,首先将它的横、纵坐标认为是经度和纬度,这样它就可以和地球表面联系起来


再通过更简单的映射方式,就可以将它“包裹”在地球表面,

Geo Projections - D3 wiki (d3-wiki.readthedocs.io)
内容全靠编
因为这个噪声是连续变化的,并且在空间上与地理经纬度具有一一对应的关系,接下来就可以进行解释。以如下两张图为例,
从太平洋上讲,它代表一个高压脊在大洋中心生成,然后分别向东、西两个方向扩散的过程; 从中国中部来讲,它代表一个气旋在高原上生成的过程,又或者这是来自西伯利亚的那个东西遇上高原而生成的反应; 从欧洲来讲,它代表高压从东欧向西欧推进的过程; 北极的情况比较怪异,因为这个分布受经度影响比较大; 相比北极来讲,南极大陆就比较没那么激烈,整体被大陆高压覆盖,然后逐渐向北移动。
这其实是个动图,可见我的 前端代码站[1]


当然,稍微有地理常识的人就会知道这个东西有多离谱,因为没有哪种云图能够免疫赤道造成的影响,这个随机噪声则没有这种性质。
而对于更复杂的,和没有那么直观的事情来说,如果有一个“权威”人士指着这样的东西说它在某种意义上是正确的,我想,没有谁会怀疑它,甚至不会跟随着它指引的方向走下去。
参考资料
前端代码站: https://observablehq.com/@listenzcc/nephogram
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