May 14, 2015

研究称南极洲冰架变薄或导致全球海平面上升

    ã€çŽ¯çƒç½‘报道 实习记者 杜晓菲】据英国广播电台(BBC)5月13日报道,。最新研究发现,由于海水变暖气温升高,南极半岛最大的冰架——拉森 C冰架,正在变薄,而它一旦最终坍塌将导致海平面急速上升。

    æ®æŠ¥é“,英国南极考察队(BAS)的此次研究分析了拉森 C冰架的变化。他们通过观察1998—2012年间的卫星雷达图像,发现拉森 C冰架的厚度减少了4米。

    æˆªè‡³ç›®å‰ï¼Œç§‘学家们还不清楚具体变化是来自冰架表层还是底部。最新发现显示,冰架两面都有变化,但底部的变化更加明显。冰架底部的洋流正在不断变暖,每年冰架底部都会减少28厘米。

    éšç€å†°é¢å˜è–„,冰架将很有可能坍塌。拉森 A和拉森 B冰架就曾分别于1995å¹´å’Œ2002年坍塌。尽管冰架内部含有大量的水,但是其对海平面上升的影响远不如冰架自身。冰架利用坚固的浮冰阻塞海湾,阻碍了来自陆地的冰川。近期,科学家警告称,南极洲冰架坍塌或将导致未来海平面上升数米。

    è‹±å›½å—极科考队科学政策主任大卫.沃恩说,Larsen C冰架将在未来几十年内坍塌,其背部的冰川破裂将导致全球海平面上升数厘米。他说:“Larsen Aå’ŒB冰架坍塌的时候,其背部的冰川加速破裂,导致整个南极洲的海平面上升。Larsen C冰架面积较大,一旦其在未来数十年坍塌,将极有可能导致海平面上升。”

    è¯¥ç ”究还发现,冰架顶部的冰雪层正在变紧凑,这可能是由于暖气流融化冰雪并渗入其原有的气泡中。冰雪密集将使融雪水涌上表层,致使冰架不稳定,同时冰面破裂,最终导致整个冰架瓦解。

    æ²ƒæ©è¿˜è¡¨ç¤ºï¼Œæµ·æ´‹å˜æš–导致海平面上升意味着冰架坍塌或将不局限于南极半岛。他说:“南极半岛是地球上变暖速度最快的地区之一,但并不是南极洲最暖的地带。如果将冰架坍塌看作是大气变暖的结果,未来数十年南极半岛将有更多的冰架坍塌。但是,如果海洋变暖对南极半岛也有影响,我们必须要同时考虑南极洲其它地区在未来几十年的变化”。

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海外网5月13日电 åº”中国国务院总理李克强邀请,印度共和国总理纳兰德拉·莫迪将于14日开启为期3天的访华之旅。此访是莫迪去年5月就任印度总理以来首次访华,为此,外媒对莫迪此次访华给予了高度关注。

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May 13, 2015

Luo village phone

This morning, received a high school classmate Luo village phone, told me this at the end of three grade high school Luo village will be held forty years after graduation reunion. The news that come unexpectedly I was thrown by a burst of waves, the memories of high school to study in the mind suddenly.

70 of the last century, I met a group of like-minded, this for high school students. Now forty years later, when the young students are full of youthful spirit, grey haired, into the stream of time, sixty years of age, have put away our youth; the vicissitudes of the years, we have been in the face without wrinkles; together, those years no classmate can recognize eyes?

For many years no students are now already blurred in my mind, but when it faces familiar with the vitality of the face, get along with classmate all sorts of situations, especially those of the tuition teacher behavior, one's voice and expression still clear in my mind kept -- the elderly headmaster Wei wind, the king serious in speech and manner to teach the language teacher teacher, teach English teacher Shao be courteous and accessible, humorous teaching chemistry teacher, rigorous teaching physics teacher, to teach math teacher Dong elegant, beautiful young English teacher Pu Lao teacher......

The school continues to this day I still fresh. Take the west gate, North and South relative to the classroom, the north is two classes of grade three classrooms, the south is the classroom two classes of grade two and the teachers' office, the west is the boiler room and the teacher of physical education teacher sun and agricultural knowledge class Teacher He couple family quarters and a piece of brick; the West built high school leaders, teachers and students called all the conference table and the monitor on duty command command students to do gymnastics broadcast break. In the past, I also served as the monitor on duty here, as the music director of the broadcast gymnastics students do gymnastics. The middle is the playground, basketball is high, the students love basketball competitive place, there are several lively naughty classmates play slapstick here; and behind the two classroom is a row of teachers' dormitory......

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