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吃货们约吗?科学家称南极磷虾总量约有10亿吨

2017-05-14 12:45:14   

原标题:吃货们约吗?科学家称南极磷虾总量约有10亿吨

现代快报讯(记者胡玉梅通讯员贾志荣实习生韩雨霁)说到南极,你会想到什么?企鹅、大风暴,还是厚厚的积雪?5月13日,由中国科学院南京分院和江苏科技馆联合主办的第二届“中科院南京分院科学面对面”公益科学体验日在江苏科技馆举办。从南极大陆科考回来的科学家温海焜给小朋友们讲述了他在南极科考的故事:要去南极,得经过两个天然屏障;南极磷虾多,但科考队员们都舍不得吃,用来喂企鹅……

魔鬼西风带,让科考队员们晕船

提到南极,首先想到的是企鹅和极光,可爱又浪漫,但你知道南极其实神秘又危险,轻易不让人踏进吗?“想进南极大陆,必须通过它的两个天然屏障。”中国科学院南京天文光学技术研究所工作人员温海焜告诉现代快报记者。

第一道是著名的“魔鬼西风带”,它位于南纬40°到60°之间,因为在古代刮跑了很多从欧洲或亚洲往南去寻找这片南极大陆的船只而得到了“魔鬼”之名。“比起刮跑,其实讲不知去向更为准确,它的可怕,即使是在航海学发生了翻天覆地变化的今天,也十分让人头疼。”温海焜说,他们所在的第27次科考队在途经西风带的时候就遇见了狂风大浪。那种风浪到底有多大?科考队员们甚至专门为它编了这么一句顺口溜,叫做“一言不发,两眼无神,三餐不食,四肢无力,五脏翻腾,六神无主,七上八下,久卧不动,十分难受。”形象地表现了当时晕船的现象。

通过了“魔鬼西风带”,第二个屏障又会出现,叫做“坚硬的海滨”。因为南极的温度非常的低,南极大陆的周围海水都结成了冰,“即使在今天,我们的科考船也很难到达大陆,只能在海滨边上就停了下来,由于这两个原因,南极就成为了我们人类最晚发现的大陆。”温海焜说。

由于南极地区视凝度比较好,人类的活动、光污染比较少,而且有连续的极夜现象,因此非常适合人类天文活动的观测。而温海焜所属的27次南极科学考察队,便是以安装南极望远镜为目的赶赴中国昆仑站进行工作。

南极磷虾多,拿来喂企鹅

在现场,温海焜他们还特地带了在南极生活所必需的一套行头给孩子们试穿。

一件红色的连体式羽绒服,一双嵌了钢板的雪地靴,一顶“老东北”的军式绒帽,一条黑色的“面巾”,一副墨镜,就是他们在寒冷南极的全部行头。“别看东西不多,却都是质量过硬的好东西。”温海焜说。

企鹅、海豹、海狮……这些都是公众比较熟悉的南极生物,但其实南极还有一种比较特殊的动物。“可能吃货们会比较感兴趣,叫做南极磷虾。”温海焜介绍说,南极磷虾现在估计有十亿吨左右。

“哇塞,那可以吃虾了……”现场的孩子们已经快要流口水了。

温海焜说,南极磷虾不仅数量多,繁殖能力还特别强。在未来食品资源匮乏的时候,南极磷虾可能就是我们补充蛋白质的主要来源。“有科学家做过统计,按每年人类的捕鱼总量一亿吨来算,如果全部置换成南极磷虾,也只是它们繁衍总量的百分之十。”

不过,虽然南极磷虾很多,但是科考队员们却舍不得吃,他们会将捕到的南极磷虾以及偶尔钓到的大鱼留给可爱的企鹅,以此拉近与企鹅的关系。

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