Climate transformation to warm-humid and its effect on
river runoff in the source region of the Yellow River |
| |
Authors: | YongChao Lan HuiJun Jin ChengFang L Jun Wen Jie Song and JinPeng Liu |
| |
Institution: | Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou,
Gansu 730000, China;Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou,
Gansu 730000, China;Institute of the Yellow River Source, Yellow River Conservancy Committee, Lanzhou, Gansu 730000, China;Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou,
Gansu 730000, China;Institute of the Yellow River Source, Yellow River Conservancy Committee, Lanzhou, Gansu 730000, China;Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou,
Gansu 730000, China |
| |
Abstract: | The change characteristics and trends of the regional climate in the source region of the Yellow River, and the response of
runoff to climate change, are analyzed based on observational data of air temperature, precipitation, and runoff at 10 main
hydrological and weather stations in the region. Our results show that a strong signal of climate shift from warm-dry to
warm-humid in the western parts of northwestern China (Xinjiang) and the western Hexi Corridor of Gansu Province
occurred in the late 1980s, and a same signal of climate change occurred in the mid-2000s in the source region of the
Yellow River located in the eastern part of northwestern China. This climate changeover has led to a rapid increase in
rainfall and stream runoff in the latter region. In most of the years since 2004 the average annual precipitation in the source
region of the Yellow River has been greater than the long-term average annual value, and after 2007 the runoff measured at
all of the hydrologic sections on the main channel of the Yellow River in the source region has also consistently exceeded
the long-term average annual because of rainfall increase. It is difficult to determine the prospects of future climate change
until additional observations and research are conducted on the rate and temporal and spatial extents of climate change in
the region. Nevertheless, we predict that the climate shift from warm-dry to warm-humid in the source region of the Yellow
River is very likely to be in the decadal time scale, which means a warming and rainy climate in the source region of the
Yellow River will continue in the coming decades. |
| |
Keywords: | global warming source region of Yellow River climate shifting hydrologic section |
本文献已被 CNKI 维普 等数据库收录! |
| 点击此处可从《寒旱区科学》浏览原始摘要信息 |
| 点击此处可从《寒旱区科学》下载免费的PDF全文 |
|