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Zou C.-X.,Inner Mongolia Agricultural University | Shen X.-D.,Inner Mongolia Agricultural University | Li H.-Y.,Inner Mongolia Agricultural University | Li X.-Z.,Inner Mongolia Agricultural University | Li Z.-J.,Inner Mongolia Weather Bureau
Water Science and Engineering | Year: 2012

The unique regional climate characteristics are among the main reasons for the frequent wind-sand activity in arid and cold areas in the agro-pastoral ecotone in Inner Mongolia, China. This paper focuses on the time series of temperature and precipitation in spring when sandstorms often occur in the area. Based on meteorological data for a 46-year period from 1959 to 2004, multi-scale variations and abrupt changes in temperature and precipitation were analyzed with the Mexican hat function (MHF) wavelet method, showing the multi-scale variation characteristics of temperature and precipitation, as well as the periods and change points at different time scales. The relationship between temperature and precipitation was obtained using the wavelet analysis method. Obvious staggered features of the variations of spring temperature and precipitation were observed in this agro-pastoral ecotone. The strongest oscillation periods of spring temperature variations were 1 and 22 years, while for precipitation, the strongest oscillation periods of variations were 2, 8, and 22 years. In addition, lower spring temperature corresponded to lower precipitation, whereas higher temperature yielded higher precipitation rate. © 2012 Editorial Office of Water Science and Engineering.


Zou C.,Inner Mongolia Agricultural University | Shen X.,Inner Mongolia Agricultural University | Li Z.,Inner Mongolia Weather Bureau
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2010

Based on the field sediment collection experiment by SCC-6 sediment collector and sediment particle composition in lab experiment in order to master the characteristics of wind erosion in agro-pastoral ecotone of northern foot of Yinshan Mountain, the sediment amount distribution along height above bare tillage land in the local was obtained, which revealed the variation of sediment amount and saltation particle composition. In addition, the sediment amount distribution along height and the relation between wind speed and sediment amount was conducted under some different wind forces in 0FDY-1.2 wind tunnel. The results showed that soil wind erosion was the near-surface wind-sand activity. The sediment particle saltates mainly in 7.5-43.5 cm. Wind sediment amount decreased along height, which correlate well with power function, exponent function and logarithm function. The sediment particle composition was influenced strongly by wind erosion intensity and topsoil characteristics. However, the regularity of sediment composition was distinct in a definite paticle size in different heights. Wind erosion amount increases with wind speed exponentially, which was influenced by times that the wind does. It will lay a soild foundation for searching the rules of soil wind erosion and puting forwards some effective measures against soil losses by wind in future.


Zou C.-X.,Inner Mongolia Agricultural University | Shen X.-D.,Inner Mongolia Agricultural University | Li X.-Z.,Inner Mongolia Agricultural University | Li Z.-J.,Inner Mongolia Weather Bureau
Jilin Daxue Xuebao (Diqiu Kexue Ban)/Journal of Jilin University (Earth Science Edition) | Year: 2011

The study focused on the climatic erosivity time series of past long years in agro-pastoral ecotone of northern foot of Yin Mountain, Inner Mongolia, China, based on the meteorology data of wind speed, precipitation, temperature, humidity and so on. The temporal-frequency multiscaling variations and abrupt change features of climatic erosivity were analyzed by the MHF wavelet method which contributes to reveal the multi-scale variations characteristics of climatic erosivity, as well as the periods and abrupt change points of climatic erosivity series in different time-scale. Meanwhile, the relationship between the sandstorm phenomenon and the wind erosion climatic erosivity was obtained in the meteorology. The results showed that there were obvious staggered features about the variations of climatic erosivity in agro-pastoral ecotone of northern foot of Yin Mountain. Furthermore, it is found that approximate 16-year period-oscillation of climatic erosivity variations is the strongest. In addition, the sandstorm is more frequent where the larger wind erosion climatic erosivity is. Finally, the wavelet coefficients patterns exhibit a strongly reducing trend in climatic erosivity in the future years in long-term, but in short-term, there is a transition from larger climatic erosivity to smaller one.


Li Y.,Chinese Academy of Agricultural Sciences | Conway D.,University of East Anglia | Wu Y.,Inner Mongolia Weather Bureau | Gao Q.,Chinese Academy of Agricultural Sciences | And 4 more authors.
Climatic Change | Year: 2013

This study addresses the role of climate variability in the livelihoods of agricultural communities in Ningxia, Northwest China. Data sources comprise meteorological observations and official reports, complemented by questionnaires and focus group discussions designed around a livelihoods framework. Sample villages were located in three different agricultural systems: irrigated, mixed irrigated/grazing, and rainfed. Much of Ningxia is perennially dry and this is a significant limiting factor to agricultural production in the region, exacerbated by drought and buffered by irrigation mainly supplied from the Yellow River. Climate observations show stable temperatures from the 1950s to the 1980s followed by a positive trend (0.38°C/decade 1961-2010). Precipitation shows very modest trends and low decadal variability. Recent climate variability, particularly a drought from 2004-2006, was perceived to have had a significant effect on agricultural production and access to water, but it was not the only challenge respondents had faced. Susceptibility to drought was higher in the mixed irrigated and grazing and rainfed areas, due to farmers' greater exposure to climatic hazards and because a higher proportion of their income originated from farming activities. Respondents were using a wide range of measures to retain and enhance soil moisture and maintain agricultural production. The discussion examines challenges in disentangling the role of climate within rapidly changing livelihood systems. © 2013 The Author(s).


Chen L.,Monitoring Station for Eco environment of Hulunbeir | Wang W.,Inner Mongolia University | Wang D.-b.,Monitoring Station for Eco environment of Hulunbeir | Wang Y.-l.,Inner Mongolia Weather Bureau
Chinese Journal of Ecology | Year: 2011

The traditional point pattern analysis based on species mapped points has its limitation when the plant individual difference is very large or the scale of the interest is of the same order of magnitude as the size of plant individual. This paper introduced a grid-based approach, extending point pattern analysis, to analyze the spatial distribution pattern and ecological process of some objects with special shape and area. Taking the spatial pattern of endemic Tetraena mongolica population with narrow area distribution in west Erdos of Inner Mongolia as a case, a community block of 30 m ×30 m was randomly selected, and divided into 1600 sub-blocks of 75 cm × 75 cm. All the photos of the study site were obtained by photography orientation method, and then processed and digitized by image processing software and GIS software. All the analyses were done by the software Programita. By using the extending point pattern analysis to analyze the spatial pattern of T. mongolica and its relationships with Zygophyllum xanthoxylum in the community, it was shown that there was a uniform distribution for the T. mongolica population at a scale of 69-99 cm, and a negative correlation between T. mongolica and Z. xanthoxylum at a scale of 350-570 cm. The grid-based method was a better way to understand the spatial pattern of shrub population.

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