震驚!南極雪出現血紅色的雪
文章來源:未知 文章作者:enread 發布時間:2020-03-11 05:58 字體: [ ]  進入論壇
(單詞翻譯:雙擊或拖選)
幾周前,位于南極的烏克蘭沃納德斯基研究站的科學家醒來發現周圍原本白茫茫的雪地被染成了令人震驚的血紅色。
A few weeks ago, scientists at Ukraine's Vernadsky Research Base in Antarctica awoke to find their usually pristine1 white surrounds drenched2 in a shocking blood-red.
 
From the gory-looking images, you could be forgiven for wondering if there'd been some sort of horror-movie-style penguin3 massacre4. The good news is that the real cause is far less dramatic; unfortunately, it still has dire5 implications.
 
Marine6 ecologist Andrey Zotov from the National Academy of Sciences of Ukraine, captured these images while conducting research at the Antarctic station. For such an epic7 mess, the culprits behind this dramatic redecoration are incredibly tiny.
 
"Our scientists have identified them under a microscope as Chlamydomonas nivalis," said the National Antarctic Scientific Centre of Ukraine in a Facebook post.
 
These microscopic8 green algae9 (we'll get to why they look red in a moment), a type of single-cellular seaweed, are common in all icy and snowy regions of Earth, from the arctic to alpine10 regions.
 
They lie slumbering11 during the brutal12 winter, but once the sunlight warms enough to soften13 their crystallised world, the algae spring awake, making use of the meltwater and sunlight to rapidly bloom.
 
"The algae need liquid water in order to bloom," University of Leeds microbiologist Steffi Lutz told Gizmodo in 2016.
 
"[The algal blooms] contribute to climate change," the centre stated.
 
A study in 2016 showed that snow algal blooms can decrease the amount of light reflected from the snow (also know as albedo) by up to 13 percent across one melt season in the Arctic.
 
"This will invariably result in higher melt rates," the researchers wrote.
 
In 2017 environmental scientists calculated that microbial communities, which include C. nivalis, contributed to over a sixth of the snowmelt where they were present in Alaskan icefields. Their experiments showed that areas with more meltwater led to the growth of 50 percent more algae and places with more algae melted further.
 
This Antarctic summer has certainly seen a lot more meltwater than usual. Temperature records keep tumbling, leading to rapid melting at a scale previously14 only seen in the Northern Hemisphere.


點擊收聽單詞發音收聽單詞發音  

1 pristine 5BQyC     
adj.原來的,古時的,原始的,純凈的,無垢的
參考例句:
  • He wiped his fingers on his pristine handkerchief.他用他那塊潔凈的手帕擦手指。
  • He wasn't about to blemish that pristine record.他本不想去玷污那清白的過去。
2 drenched cu0zJp     
adj.濕透的;充滿的v.使濕透( drench的過去式和過去分詞 );在某人(某物)上大量使用(某液體)
參考例句:
  • We were caught in the storm and got drenched to the skin. 我們遇上了暴雨,淋得渾身透濕。
  • The rain drenched us. 雨把我們淋得濕透。 來自《簡明英漢詞典》
3 penguin W3jzf     
n.企鵝
參考例句:
  • The penguin is a flightless bird.企鵝是一種不會飛的鳥。
  • He walked with an awkward gait like a penguin.他走路的步子難看得就像企鵝。
4 massacre i71zk     
n.殘殺,大屠殺;v.殘殺,集體屠殺
參考例句:
  • There was a terrible massacre of villagers here during the war.在戰爭中,這里的村民慘遭屠殺。
  • If we forget the massacre,the massacre will happen again!忘記了大屠殺,大屠殺就有可能再次發生!
5 dire llUz9     
adj.可怕的,悲慘的,陰慘的,極端的
參考例句:
  • There were dire warnings about the dangers of watching too much TV.曾經有人就看電視太多的危害性提出嚴重警告。
  • We were indeed in dire straits.But we pulled through.那時我們的困難真是大極了,但是我們渡過了困難。
6 marine 77Izo     
adj.海的;海生的;航海的;海事的;n.水兵
參考例句:
  • Marine creatures are those which live in the sea. 海洋生物是生存在海里的生物。
  • When the war broke out,he volunteered for the Marine Corps.戰爭爆發時,他自愿參加了海軍陸戰隊。
7 epic ui5zz     
n.史詩,敘事詩;adj.史詩般的,壯麗的
參考例句:
  • I gave up my epic and wrote this little tale instead.我放棄了寫敘事詩,而寫了這個小故事。
  • They held a banquet of epic proportions.他們舉行了盛大的宴會。
8 microscopic nDrxq     
adj.微小的,細微的,極小的,顯微的
參考例句:
  • It's impossible to read his microscopic handwriting.不可能看清他那極小的書寫字跡。
  • A plant's lungs are the microscopic pores in its leaves.植物的肺就是其葉片上微細的氣孔。
9 algae tK6yW     
n.水藻,海藻
參考例句:
  • Most algae live in water.多數藻類生長在水中。
  • Algae grow and spread quickly in the lake.湖中水藻滋蔓。
10 alpine ozCz0j     
adj.高山的;n.高山植物
參考例句:
  • Alpine flowers are abundant there.那里有很多高山地帶的花。
  • Its main attractions are alpine lakes and waterfalls .它以高山湖泊和瀑布群為主要特色。
11 slumbering 26398db8eca7bdd3e6b23ff7480b634e     
微睡,睡眠(slumber的現在分詞形式)
參考例句:
  • It was quiet. All the other inhabitants of the slums were slumbering. 貧民窟里的人已經睡眠靜了。
  • Then soft music filled the air and soothed the slumbering heroes. 接著,空中響起了柔和的樂聲,撫慰著安睡的英雄。
12 brutal bSFyb     
adj.殘忍的,野蠻的,不講理的
參考例句:
  • She has to face the brutal reality.她不得不去面對冷酷的現實。
  • They're brutal people behind their civilised veneer.他們表面上溫文有禮,骨子里卻是野蠻殘忍。
13 soften 6w0wk     
v.(使)變柔軟;(使)變柔和
參考例句:
  • Plastics will soften when exposed to heat.塑料適當加熱就可以軟化。
  • This special cream will help to soften up our skin.這種特殊的護膚霜有助于使皮膚變得柔軟。
14 previously bkzzzC     
adv.以前,先前(地)
參考例句:
  • The bicycle tyre blew out at a previously damaged point.自行車胎在以前損壞過的地方又爆開了。
  • Let me digress for a moment and explain what had happened previously.讓我岔開一會兒,解釋原先發生了什么。
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