Global warming accelerating: study

    Source: Xinhua| 2018-01-25 06:43:27|Editor: Mu Xuequan
    Video PlayerClose

    CHICAGO, Jan. 24 (Xinhua) -- Record jump in global surface temperatures from 2014 to 2016 has boosted the total amount of warming since 1900 by more than 25 percent in just three years, a study shows.

    The study, led by a University of Arizona-led team, has been published online in the journal Geophysical Research Letters.

    The researchers analyzed 15 different datasets, including observations of global mean surface temperatures from 1850 to 2016, ocean heat content from 1955 to 2016, sea level records from 1948 to 2016 and records of the El Ni?o climate cycle and a longer climate cycle called the Pacific Decadal Oscillation, and found the Earth's average surface temperature climbed about 0.9 Celsius degrees from 1900 to 2013.

    By analyzing global temperature records, researchers further found that by the end of 2016, the global surface temperature had climbed an additional 0.24 Celsius degrees, which is unprecedented in the 20th and 21st centuries

    Although some release of heat from the Pacific Ocean is normal during an El Ni?o, the researchers found much of the heat released in 2014-2015 was due to additional warming from increases in the amount of greenhouse gases in the atmosphere.

    "The result indicates the fundamental cause of the large record-breaking events of global temperature was greenhouse-gas forcing rather than internal climate variability alone," said lead author Jianjun Yin, a University of Arizona associate professor of geosciences.

    The researchers also projected how often a 0.24-Celsius-degree global temperature increase might occur in the 21st century depending on the amount of greenhouse gases emitted worldwide between now and 2100. The team used four representative concentration pathway (RCP) models that project future climate change between 2016 and 2100.

    For the low-emission RCP scenario, in which greenhouse gas emissions peak by 2020 and decline thereafter, temperature jumps of at least 0.24 Celsius degrees might occur from zero to two times in the 21st century, the team found.

    For the highest-emission RCP scenario, in which greenhouse gas emissions rise unabated throughout the 21st century, spikes of record warm temperatures would occur three to nine times by 2100.

    "As a climate scientist, it was just remarkable to think that the atmosphere of the planet could warm that much that fast," said study co-author Jonathan Overpeck, dean of the University of Michigan (UM) School for Environment and Sustainability.

    Adapting to the increases in the frequency, magnitude and duration of rapid warming events projected by the higher-emission scenario will be difficult.

    "If we can reduce greenhouse gas emissions, we can reduce the number of large, record-breaking events in the 21st century-and also we can reduce the risk," Yin said.

    TOP STORIES
    EDITOR’S CHOICE
    MOST VIEWED
    EXPLORE XINHUANET
    010020070750000000000000011105091369222501
    主站蜘蛛池模板: 国产成人精品午夜二三区| 无码国产精品一区二区高潮| 午夜亚洲WWW湿好大| 国产成人精品啪免费视频| 天天做天天躁天天躁| 久久久国产视频| 欧美日韩**字幕一区| 十七岁日本高清电影免费完整版| 免费观看国产网址你懂的| 奇米影视777me| 久久久无码精品亚洲日韩按摩| 欧美高清在线视频在线99精品| 国产一区二区三区在线观看免费 | 9lporm自拍视频区在线| 无码任你躁久久久久久| 五月婷中文字幕| 欧美精品在线免费| 免费人成视频在线| 羞羞色在线观看| 国产原创精品视频| jlzzjlzz亚洲jzjzjz| 在线播放日本爽快片| 三级理论中文字幕在线播放| 日本边添边摸边做边爱的网站| 亚洲日韩久久综合中文字幕| 精品久久欧美熟妇WWW| 国产女王丨vk| 69堂国产成人精品视频不卡| 国色天香论坛社区在线视频| 一级毛片直播亚洲| 无码欧精品亚洲日韩一区| 久久精品无码一区二区三区| 欧美午夜免费观看福利片| 亚洲精品国偷自产在线| 精品99在线观看| 啊灬啊灬别停啊灬用力啊免费| 调教奴性同桌h| 国产在线视频一区二区三区| 538精品视频在线观看mp4| 夫妇交换性3中文字幕| 中文字幕一区二区三匹|