中英對照讀新聞／Space pictures pick up lots more penguins 太空圖像捕捉到更多的企鵝
◎ 魏國金
http://iservice.libertytimes.com.tw/Service/english/english.php?engno=576850&day=2012-04-18
Scientists counting emperor penguins from space have found twice as many of the birds in Antarctica as expected.
從太空計算帝王企鵝的科學家發現，在南極的帝王企鵝數兩倍於預期。
Using high-resolution satellite images to study each of 44 colonies around the coastline of Antarctica, experts said they put the total emperor penguin population at 595,000, or roughly double previous estimates of 270,000 to 350,000. Seven of the colonies studied had never been seen before.
在利用高解析衛星影像來探究南極海岸線周邊44個帝王企鵝棲地後，專家說，他們將帝王企鵝總數定在59萬5000隻，大約比之前估算的27萬至35萬隻之間多了一倍。研究的棲地中有7處之前未曾發現。
A key advantage of satellites is that they can capture multiple images in one go, whereas visiting dozens of remote colonies in temperatures as low as -50 degrees Celsius would be hugely expensive and time-consuming.
衛星的一個關鍵優勢是它們能一口氣捕捉到多個地點的影像，因為在低達攝氏零下50度的溫度中，走訪數十個遙遠的棲地將是極度昂貴與耗時的工程。
Still, conducting a penguin roll-call from space is not simple. It took a special technique known as pan-sharpening to increase the resolution of the satellite images to differentiate between birds, shadows and penguin poo, or guano.
儘管如此，從太空中點數企鵝並不簡單。它須採取彩色合成影像處理的特殊技術來增加衛星影像的解析度，以區分出企鵝、陰影與企鵝糞便，或鳥糞層的差異。
While some images remained tricky to analyse, Peter Fretwell, the team leader of the British Antarctic Survey, believes the overall population figure is correct to within a 10-12 percent margin of error.
然而部分影像仍難以解析，英國南極調查所的團隊領導人彼得．弗瑞特威爾認為，企鵝整體數目在誤差範圍10%至12%內是正確的。
The study by Fretwell and colleagues, published in the online journal PLoS ONE, marks the first time that researchers have counted the entire population of any species by satellite.
(Reuters)
這項由弗瑞特威爾與同僚共同進行並刊載於網路期刊「公共科學圖書館—綜合」的研究，是研究人員首度利用衛星來普查任一物種的整體數目。
（路透）
新聞辭典
time-consuming︰形容詞，耗時的。例句︰Restoring credit after bankruptcy is a time-consuming process. （破產後信用的恢復是一個曠日廢時的過程。）
in（at）one go︰片語，一口氣、一下子。例句︰I’ve never seen anyone eat as many cakes in one go.（我從未看過哪個人一口氣吃下這麼多蛋糕。）
roll-call︰名詞，點名、點名時間。也可當形容詞，指點名式的，比如，a roll-call vote（唱名表決。）
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