男友太凶猛1v1高h,大地资源在线资源免费观看 ,人妻少妇精品视频二区,极度sm残忍bdsm变态

Global EditionASIA 中文雙語Fran?ais
China
Home / China / Society

Past 30 years, the warmest in past 2,000 years: research

Xinhua | Updated: 2019-03-15 17:21
Share
Share - WeChat
Visitors enjoy Dutch tulips at Huxi campus of Chongqing University on Feb 26, 2019. [Photo/VCG]

NANJING -- Chinese and American scientists in joint research found that the past 30 years are the warmest time in the past 2,000-year period, due to the effect of anthropogenic greenhouse gas.

The scientists were able to read the well-dated and quantitative air temperature record through the research on a sediment core collected at a small alpine lake in subtropical Southwest China's Yunnan province.

The report on the research was published on the March issue of the international journal of Earth and Planetary Science Letters.

The research was carried out by the State Key Laboratory of Lake Science and Environment under the Chinese Academy of Sciences and Columbia University.

In the past 2,000 years, Earth's climate system has transitioned from being forced solely by natural factors to also being forced by anthropogenic greenhouse gases. However, previous to the research, many existing climate records only extend back approximately 1,000 years in some continents.

The sediment samples from Tiancai Lake, located some 4,000 meters above sea level, keep the 2,000-year-long record. The sediment has not been affected by human activities and can reflect multi-centennial-scale temperature fluctuations.

Zhao Cheng, a member of the research team, said the high-altitude region is sensitive to climate changes. Solar radiation and volcanic activities used to be major natural factors affecting the climate. However, during the latter half of the 20th Century, anthropogenic greenhouse gas has become a major cause of the temperature rise.

Top
BACK TO THE TOP
English
Copyright 1995 - . All rights reserved. The content (including but not limited to text, photo, multimedia information, etc) published in this site belongs to China Daily Information Co (CDIC). Without written authorization from CDIC, such content shall not be republished or used in any form. Note: Browsers with 1024*768 or higher resolution are suggested for this site.
License for publishing multimedia online 0108263

Registration Number: 130349
FOLLOW US
 
主站蜘蛛池模板: 大关县| 汶川县| 饶阳县| 乌恰县| 龙川县| 威海市| 始兴县| 鄂尔多斯市| 平塘县| 夏河县| 孟州市| 香港 | 巴塘县| 疏附县| 广德县| 安远县| 高尔夫| 肥东县| 邓州市| 长垣县| 筠连县| 泰州市| 平顺县| 余干县| 汝阳县| 诸城市| 太保市| 鹿邑县| 松溪县| 德阳市| 大港区| 长泰县| 新乐市| 乌恰县| 宜宾县| 育儿| 中阳县| 拉萨市| 府谷县| 延川县| 鹿邑县|