scholarly journals The Spatial Distribution of Precipitation in Northwest China

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Chuancheng Zhao ◽  
Shuxia Yao ◽  
Jun Liu ◽  
Jian Wang
Keyword(s):  
Climate Change ◽  
Spatial Distribution ◽  
Temperature Change ◽  
Global Climate Change ◽  
Global Climate ◽  
Northwest China ◽  
Monthly Precipitation ◽  
The West ◽  
Monthly Data ◽  
Southern Shaanxi

Northwestern China has an extremely complex climate due to the varied terrain and complexities of climate change where the environment is sensitive to both regional and global climate change. We employed the Mann-Kendal test to investigate trends of precipitation distributions using annual, seasonal, and monthly data records from 1960 to 2008. On the whole, the variations in precipitation patterns are more complex than those for temperature. The trends of annual, seasonal, and monthly precipitation have shown remarkable differences between the east and west. In the west such as in northern Xinjiang and western Qinghai, the variation is a significant increase, consistent with the temperature change, whereas in the east such as in eastern Gansu, and southern Shaanxi, the variation is a remarkable decrease, opposite to the change observed in temperatures.

Analysis of the Temperature Variation Pattern under Climate Change in Northwest China

2014 ◽  
Vol 955-959 ◽  
pp. 1093-1097
Author(s):  
Chuan Cheng Zhao ◽  
Shu Xia Yao ◽  
Zhi Guo Ren ◽  
Jian Wang
Keyword(s):  
Climate Change ◽  
Temperature Variation ◽  
Global Climate Change ◽  
Global Climate ◽  
Northwest China ◽  
Precipitation Pattern ◽  
Western Region ◽  
Eastern Region ◽  
Variation Pattern ◽  
Monthly Data

Northwestern China has an extremely complex climate due to the varied terrain and complexities of climate change where the environment is sensitive to both regional and global climate change. We applied the Mann-Kendal test to investigate trends in temperature change using annual, seasonal and monthly data recorded from 1960 to 2008. On the whole, annual, seasonal and monthly the temperature shows a widespread warming over this period. The variation in the precipitation pattern is more complex than that of the temperature. In the western region such as northern Xinjiang and western Qinghai, the precipitation has increased over the period, showing consistency with the change in temperature. Whereas in the eastern region such as eastern Gansu and southern Shanxi, the precipitation has remarkably decreased, which is opposite to the change observed in temperature.

scholarly journals Sustainable Agriculture Development in Northwest China Under the Impacts of Global Climate Change

2021 ◽  
Vol 8 ◽  
Author(s):  
Dachuan Liu ◽  
Yan Li ◽  
Pengfei Wang ◽  
Huaqi Zhong ◽  
Pu Wang
Keyword(s):  
Climate Change ◽  
Sustainable Agriculture ◽  
Global Climate Change ◽  
Disaster Response ◽  
Heat Waves ◽  
Global Climate ◽  
Northwest China ◽  
Species Selection ◽  
Agricultural System ◽  
Agriculture Development

Northwest China has one of the most vulnerable agricultural systems in the context of global climate change. We argue that sustainable agriculture development in this region requires a systematic approach toward climate change adaptation, and propose a schematic framework for strategic thinking. We first briefly review the impacts of climate change on various agricultural environmental factors, including light, temperature, water, and atmosphere, and explores the effects of climate change on agricultural practices, such as disaster response, pests and weeds control, fertilizer application, and species selection. The study shows that climate change has increased extreme climate disasters such as drought and heat waves, and has expanded the scope and severity of pests and weeds, which in turn requires a series of changes in farming practices. These effects have profound impacts on farmland management, as well as the sustainability of the agricultural system. Based on the findings, the authors argue that the key adaptation strategies should include: (1) optimizing the geographic distribution of agriculture, (2) cultivating new crop varieties that can better adapt to the changing environment, (3) adjusting cropping timing and structure, (4) developing water-saving irrigation systems, (5) improving capacities of disaster prevention and mitigation at both household and government levels, and (6) strengthening the sciences, technology, and human resources to mitigate the adverse effects of climate change.

scholarly journals The Changbai Alpine Shrub Tundra Will Be Replaced by Herbaceous Tundra under Global Climate Change

Plants ◽  
2019 ◽  
Vol 8 (10) ◽  
pp. 370
Author(s):  
Yinghua Jin ◽  
Jiawei Xu ◽  
Hongshi He ◽  
Mai-He Li ◽  
Yan Tao ◽  
...  
Keyword(s):  
Climate Change ◽  
Spatial Distribution ◽  
Plant Species ◽  
Global Climate Change ◽  
Global Climate ◽  
Alpine Tundra ◽  
Slope Aspect ◽  
Herbaceous Species ◽  
Tundra Zone ◽  
Growing Season Length

Significant replacement of shrub species by herbaceous species has been observed in the Changbai alpine tundra zone, China, since the 1990s. This study used plot surveys to analyze variations in the spatial distribution of dominant plants and to ascertain the changing mechanisms of dominant species in the alpine tundra zone. We found that the two previously dominant shrubs, Rhododendron chrysanthum and Vaccinium uliginosum, differed markedly in their distribution characteristics. The former had the highest abundance and the lowest coefficient of variation, skewness, and kurtosis, and the latter showed the opposite results, while the six herb species invaded had intermediate values. R. chrysanthum still had a relatively uniform distribution, while the herbaceous species and V. uliginosum had a patch distribution deviating from the normal distribution in the tundra zone. Micro-topography and slope grade had stronger effects on the spatial distribution of the eight plant species than elevation. Herbs tended to easily replace the shrubs on a semi-sunny slope aspect, steep slope, and depression. Overall, the dominance of dwarf shrubs declined, while the herbaceous species have encroached and expanded on the alpine tundra zone and have become co-dominant plant species. Our results suggest that various micro-topographic factors associated with variations in climatic and edaphic conditions determine the spatial distribution of plants in the alpine tundra zone. Future climate warming may cause decreased snow thickness, increased growing season length, and drought stress, which may further promote replacement of the shrubs by herbs, which shows retrogressive vegetation successions in the Changbai alpine tundra zone. Further studies need to focus on the physio-ecological mechanisms underlying the vegetation change and species replacement in the alpine tundra area under global climate change.

Sign in / Sign up

Export Citation Format

Share Document