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  • 2010 Volume 30 Issue 1
    Published: 20 January 2010
      

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  • 论文
    YE Chao, CAI Yun-long
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    Little work has been done about radical geography and Marxist geography until now in China. Particularly thinking of China as a country which regards Marxism as guidelines and asserts it is the main or almost only correct ideology, we should not ignore and forget to know and understand the theories and practices of radical geography and Marxist geography. For this reason, this paper tries to introduce a representative figure, James Blaut and review his opinions and methods in the area of radical geography for Chinese geographers. In terms of method, case study is an important method for methodological research. According to choosing "The Dissenting Tradition", a classical paper in the history of radical geography written by James Blaut as the case, we analyzed and extended its meanings. Firstly, James Blaut is "the most exemplary" Marxist geographer as David Harvey ever appraised. As a Marxist, he is so full of the critical spirit that he really conforms to one of the most important criterion and principle that Marx put forward, which is "for a ruthless criticism of everything existing". Secondly, in the light of the paper by Blaut, we restated the theories and practice of radical geography, and summarized its main points and the meanings on the geographical methodology. Finally, at the same time of studying his opinions and contents, we should see and admire his courage and spirit to hold on a ruthless criticism of everything including himself all the time. Based on understanding exactly what Blaut and his paper wants to express, we can conclude that: ① radical geography is the product of the interaction between the capitalist crisis and the defective positivism geography; ② geography is not ever a "pure and objective" discipline holding neutrality of value, and geographers are under the jurisdiction of their race-class identity; ③ radical geography is founded mainly by starting publications, establishing the groups and a campaign to spread the radical thought, and most radical geographers finally become Marxists.Maybe it is the most inspirational for us that the theoretical reconstruction based on criticism and self-criticism is the main means of innovating geographical methodology. China should actively carry out theoretical research and practical activities of the radical and Marxist geography.
  • 论文
    GUI Yan-li
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    Through the study on morphological characteristics of urban space during different historical periods,we found that the spatial distribution of the ancient cities in Northeast China showed the characters of intermittent, unbalanced, geographical isolated and different in space form because of the regional specificity. Affected by geographic conditions, cultural, ethnic factors, social system and socio-economic patterns, Northeast China city has developed a unique regional system.
  • 论文
    ZHANG Zhan-ren, DU De-bin
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    The agglomeration of R&D investment is in favor of getting knowledge spillover, sharing their knowledge and information, saving costs and reducing the R&D risk. In this article, the method of the spatal econometrics, such as Moran index and spatial model were used to analyze the spatial linkage and location factors of the R&D investment by transnational corporations in China. The results showed that the actions of R&D investment had closed spatial association and exhibited obvious spatial agglomeration on the province’s scale. Endogentic factor also had a significant and positive impact on the formation of spatial agglomeration besides the factors of market scale, demand and supply factors of human resources.
  • 论文
    XUAN Guo-fu, XU Jian-gang, ZHAO Jing
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    Spatial association is the essential characteristics of spatial related things and phenomena. Exploratory Spatial Data Analysis (ESDA) provides an effective method to reveal the spatial association. The formation of urban social space and its characteristics make the phenomenon of urban social spatial pattern also show significant spatial association. Based on factor analysis, the ESDA methods were applied to urban social space research with the Central Urban District in Shanghai as a case study. From the global and local dimensions, spatial association characteristic of the main factors of urban social space were revealed, by using the indicators and methods of Global Moran’s I index, Moran scatter plot and LISA(Local Indicators of Spatial Association). Global spatial autocorrelation analysis showed that the main factors of urban social space were all with significant spatial association, but there were differences in the degree of spatial association. The factors of socio-economic status and living conditions had stronger spatial association than other factors. Spatial agglomerations of similar socio-economic status and living conditions groups had more prominent contributions to the formation of urban social space. Local spatial autocorrelation analysis demonstrated that the main factors had different local spatial association from the overall pattern, there are obvious "hot spots" and "cold spots", and also some spatial "outliers". The socio-economic status and the residential condition factors show more obvious "hot spots" and "cold spots ", which manifested the characteristics of significant "homogeneous agglomeration, heterogeneous segregation ".
  • 论文
    CHEN Zai-qi, YAN Xiao-pei, CAO Xiao-shu
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    The roles of a port are of importance in the local economy, which has drawn attentions in the many studies. Yet there are relatively few studies on the port service industries. The spatial characters and associated mechanism of the port service industries in Guangzhou were focused on. The pot service industries in Guangzhou wase highly spatial concentrated and Zhujiang-dependence. The spatial concentrating was steady while the shifting of enterprises was very frequent. The spatial distribution of the port service industries varied greatly with the different type. In general, it was apt to be concentrated to the trading port and the CBD. The spatial character is an synthesized outcome of the location, the nature of the industries, the evolution of the port spatial system, the urban planning influences and innovation of ICT.
  • 论文
    LIU Yun-gang, ZHOU Wen-ting, TAN Yu-wen
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    The idea of livable city is in the spotlight in China recently,not only the government,but also the researchers and the media have paid attention to the livable city.But it’s a pity that the livable city’s concept and relevant standard are not clear.Reflections on how to define livable city were discussed in the paper.Besides,questionnaire and semi-structured interviews were combined to discuss the livability of Guangzhou from the prospective of some particular citizens,the professional housewives who emigrating from Japan into Guangzhou.All of those Japanese housewives are members of Japanese women’s association of Guangzhou (JWAG),they have only involved the living space and have separated from the production space for some reasons.So their evaluations of Guangzhou city’s livability are objective and relatively neutral.Besides,their home country,Japan,can also offer some meaningful references for Chinese urban development.Therefore,based on the perspective of Japanese housewives,the results of this research,are meaningful to international construction of Chinese metropolis and livable construction of people-oriented city.The evaluation method of this study mainly takes Japanese assessment on "livable city" as a reference.And the public security,housing,insurance,transportation,medical care,education,shopping,food,environment,climate,culture,entertainment and human relationship were taken as the evaluated factors to assess the livable characteristics from five aspects:the living safety,living conditions,affluence,convenience and comfort.Scores were designed to:5 points stands for great satisfaction;4 points refers to quite satisfaction;3 points means general satisfaction;2 points means dissatisfaction;1 point shows rather dissatisfaction.According to those Japanese housewives’ contrast between Japanese cities and Guangzhou,the degree of livability and the main aspects of improvement in Guangzhou were well discussed.Except living condition,other aspects were worse than those in Japan from Japanese housewives’ point of view,especially the data of medical care,education,environment,shopping and entertainment,which were over 2 times less than those of Japan.The result showed that there was a big problem in the convenience and comfort of Guangzhou.In the Japanese housewives opinion,there is a long way to go in order to become a real livable city for Guangzhou.For one thing,its degree of livability is low.For another,both those housewives’ special cultural background,overseas experience,role concepts,and their residence time in Guangzhou also effect on the evaluated results.
  • 论文
    DUAN Xue-jun, TIAN Fang
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    The optimized allocation of population distribution should not only consider the cost and revenue of Population aggregation, but also should pay attention to the restriction and suitability level of human settlements. First, by building the revenue function and external cost function of population, this paper analyzed the optimal population for the central city, suburb area and county area of Nanjing city. Then by using random and objective function based on evaluation for the suitability level of human settlements, taking the forecasted total population and optimal population for circle areas as constraints, and using Monte Carlo methods, analyzed the population’s optimized allocation distribution. Compared with current population distribution, this paper divided the studied area in to four different types for population growth and distribution. Finally, this study showed that, population densities of business and older areas like Hunan Road, Xinjiekou, Hongwulu, Chaotiangong Streets are so high that there are needs of controlling the population size.The comprehensive suitability levels for population distribution in the suburb area, like Dongshan, Yanjiang, Xianlin towns, are relatively higher. Considering the faster economic growth rate and lower population density of these areas, population aggregation should be encouraged.The ecological sensitivity of northern, southern parts and ecological protecting areas are relatively higher, which means the population growth rate should be controlled, and people in these regions should be guided to move to other areas.
  • 论文
    FAN Yu, YANG Gui-shan, TU Xiao-song
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    Quantity of land reserve is a core aspect of land reserve system. It has been paid attention to by many experts and researchers in China . New land reserve is a main part of urban extension. The SLEUTH model, a cell-based tempo-spatial process model, was always applied to interpret historical land use change and simulate future change scenarios .This paper selected Nanjing city as the study area, historical land use scenarios for 1947, 1978, 1990, 2000 and 2005 were analyzed to track urban sprawl by TM/ ETM images explanation and spatial analysis of ArcGIS software. Through the SLEUTH model city expanding course of Nanjing in 2010, 2015 and 2020 were simulated in the paper, and the predicting amount of new land reserve was got by using average proportion of new land reserve area in whole expanding area of Nanjing . By now this method is a new way for prediting quantity of land reserve. Not only can it get the predicting amount of new land reserve in this way, but also it can get spatial distribution project of new land reserve blocks by spatial analysis method of GIS. It will play a great role in work of land reserve.
  • 论文
    CHENG Ye-qing
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    Applying system dynamics method to establish models of regional sustainable development can depict systemic nonlinear structure and dynamic character more adequately than traditional mathematic models. Based on the structure, function and coupling mechanism analysis of agricultural territorial system, the dynamic simulation model of agricultural territorial structure change was established, and according to the trend and aim of regional agriculture development, the multiple scene dynamic simulation was carried out, and three typical development modes of regional agricultural territorial system were optimized and comparatively analyzed. By Comparative Analysis, the coordinated development mode of agriculture and animal husbandry is the reasonable development mode. To establish reasonable agricultural territorial structure, the northeast China should attach great importance to control the non-agricultural land, to excavate comprehensive potentiality of agriculture production, and to nurture advantage agricultural production bases and industrial belts.
  • 论文
    MAN Ming-jun, LI Tong-sheng, LI Shu-kui, LI Pu-feng
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    Based on the investigation data in Shaanxi Province, Gansu Province and Ningxia Hui Autonomous Region, where are the traditional agricultural areas in northwest, the apple breed technology, wheat seed technology and water-saving irrigation technology were chosen as the research objects. An systematic analysis of the difference in farmer’s adoption of new technology which is affect by the technology environment was made. The results showed, the technology environmental factors had great impact on farmer's adoption of new technology, and the soft environment’s impact was greater than the hard environment. Meanwhile, there was a big difference between the behaviors in farmer’s adoption of new agricultural technologies with different attributes. It specifically expressed that the adoption of apple breed technology was easily affect by the fruit company, the services times of agricultural technique department, the quality of technical training and the credit condition. The adoption of wheat seed technology was easily impact by the research organizations, the services times and quality of agricultural technique department, interpersonal network and the technology supply channel. The water-saving irrigation technology was more vulnerable to the impact of the technical organization with social service functions, the preferential policies and the media. At the same time, it can be found that the geographical factors had obvious restraints on farmer’s adoption of new technology.
  • 论文
    ZHAO Zhen-yu, SONG Dong-lin
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    In contemplating the future course of economic growth all over the world,more and more scientists have been aware that economic development was damaging our environment.One persistent concern has been that man’s economic activities would reach a scale where the global climate would be significantly affected.Lots of articles have given the brief overview of the climatic implications of economic activity with special reference to carbon dioxide,and then will present possible strategies for control.It is thought that the economic activities which most affect climate are agriculture and energy.Of these.the latter is probably more significant,is certainly more easily analyzed.A brief overview of the interaction between carbon dioxide and the climate is as follows:combustion of fossil fuels leads to emissions of carbon dioxide into the atmosphere.Fossil fuels are?hydrocarbons?found within the top layer of the earth’s?crust,and they are the most important useful energy,and will be discussed here.In the energy sector,emissions of carbon dioxide,particulate matter,and heat are of significance for the global climate.Recent evidence indicates that,even after several millenia,the dynamic processes which determine climate have not attained a stable equilibrium.One of the more carefully documented examples is the global mean temperature which over the last 100 years has shown a range of variation of five-year averages of about 0.6℃.Many climatologists feel that it is prudent to consider as significant the changes witnessed in the last centurythe 0.6℃ range.Although the estimates are uncertain,it is probable that for carbon dioxide such a change would come with an increase of approximately 20 percent in atmospheric concentrations over preindustrial levels.Once in the atmosphere,the residence time appears to be very long,with approximately one-half of all industrial carbon dioxide still airborne.Because of the selective absorption of radiation,the increased atmospheric concertration is thought to lead to increased surface temperatures.The most recently study to date predicts that a doubling of atmospheric concentrations of carbon dioxide would eventually lead to a global mean temperature increase of 3℃.The predicted temperature increase by latitude indicates that there is considerable amplification at high latitudes.3 China is one of the biggest economy all over the world today,and she has to think of the problem of the global climate.Since 1990s,China has been very successful in economical increasing,in which fossil fuels are absolutely necessary.However,using fossil fuels unlimitedly is dangerous for our environment.In this text we use Ecological Footprint model created by William Ree and Mathis Wackernagel in 1992 to calculate Chinese Fossil Energy Footprint (FEF) and Fossil Energy Capacity (FEC) from 1996 to 2006.We find Chinese Fossil Energy Deficit (FED) has happened.emission of 1 unit energy not decreased and the forest covering not increased obviously were the main causes of Fossil Energy Deficit.
  • 论文
    WANG Ai-min, MA Xue-guang, YAN Xiao-pei
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    Rapid industrialization and urbanization process makes the functional value of urban ecology space even more remarkable. The green land protection policy on public interest results in barriers to develop rural community economy and promote residents’ income, which lead to more and more social conflicts originated from urban and rural land use. On the basis of urban spatial political-economy theory, and actors network theory, in a case of Fruit Tree Protection Zone of Haizhu District in Guangzhou City(HZFTPZ) the article investigated the evolution process, origins, types and governance mechanics of land use conflicts. The article found that, the evolution process of land use conflicts could be divided into 4 stages according to the intensity and levels of significance, i.e., latent period, obvious period, transformation period and conglutination period. But Nondeterminacy still exists in the further evolution of land use conflicts because of the role of conflict circle. During the evolution of land use conflicts, land use conflicts subjects spread from the core of land use conflicts to the periphery, social actors involved emerged ceaselessly, and conflict issues, standpoints and attitudes of conflict subjects and approaches to resolve conflicts were sequentially changed. In addition, land use conflicts were divided into procedure conflicts, value conflicts, interest conflicts and structure conflicts from appearance to nature, based on their origins and differentiation display. And all types of land use conflicts were logically related, because of the organically interaction and integration of social actors’ factors and social and economic regimes structure factors. Many land use conflicts registered as procedure destination differences among social actors, and the even deeper reasons displayed as the value judgment differences on the priority of protection-development and public interest-individual-interest among parties to a conflict, and the subjective understanding differences on land use interest distribution and risk exposure among parties to a conflict, but the final origins of conflict expansion or continuous agglutination existed in policy defects and regime cruxes in procedure design standard, values guidelines and interest distribution balance. During the governance process of land use conflicts, various sorts and varieties of social actors centered on some issues, established interlaced networks by consultation and negotiation and made up mechanics of recourse sharing and mutual benefit and collaboration, thus gained the ends of collaborative governance. The concrete measures including to establish the participation and communication networks based on communicating and participating of stakeholders, the collaborative governance network based on the networking cooperation of social actors, the community co-management network based on the appeal of community participation, the interest coordination network based on interest balance and coordination of stakeholders, and the land use conflict prevention and mediation network based on the prevention and mediation of land use conflicts.
  • 论文
    XIONG Hei-gang, ZOU Gui-hong, CUI Jian-yong
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    The space-time characteristics and evolvement of urban spatial structure were explored in the paper by using GIS technology. The study showed that the single city center (Dashizi) of Urumqi was developed progressively into multi-center (Youhao, Tieluju, Huochezhan) during the study period. The multi-center distributing characteristic of urban spatial structure appeared. The area of agricultural land was reduced constantly in each city center (growth pole).And the reduced speed of agricultural land in Tieluju which was far away from the largest city center (Dashizi) was fastest. But the area of residential and commercial land were increased all the time. While the industrial land near Dashizi keeped reducing,that of Dieluju was increased all the time. And industrial land in Youhao showed the characteristic of increasing in earlier stage (1970-1984) and reducing in later stage (1984-1993).
  • 论文
    SHAO Yi-xi, LI Man-chun, CHEN Zhen-jie, YANG Kang, CAI Dong
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    In this paper, Menghe Town in Changzhou City, Jiangsu Province was selected as a case to build a Geographically Weighted Regression analysis model for land use patterns simulation, which considers the spatial non-stationary of the impact on the land use patterns change of the driving factors. The simulation result was compared with OLS Logistic regression model. It is indicated that Geographically Weighted Regression model is not only able to improve simulation accuracy of regional land-use patterns, but also able to obtain spatial differentiation of the impact of the driving factors on land use patterns. Meanwhile, this study can also support the government decisions on land use management for Menghe Town and similar areas.
  • 论文
    LI Yang-bing, WANG Shi-jie, CHENG An-yun, LI Wei-hai, LUO Guang-jie
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    Taking Panxian County as a study case, the authors make a thorough analysis on regional karst rocky desertification assessments and their spatial scale impacts based on different grid units at 100 m?100 m, 200 m?200 m, 500 m?500 m, 1000 m?1000 m. The calculation of karst rocky desertification integrated assessment index (KDI) takes the percentage of areas and the patch assembles of grid units into consideration, which could reveals the spatial heterogeneity of karst rocky desertification. The results indicate that the KDI is influenced by assessment unit sizes, and there are some differences among assessment results of four spatial units and the actual distribution of karst rocky desertification. Moreover, the assessment results for karst rocky desertification at severe degree are consistent with the desertification distribution map, while those for the desertification at a light degree show a significant difference.
  • 论文
    XU Xiao-jun, YANG Shi-lun, ZHANG Zhen
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    As the core of fluvial geomorphology, sediment parameters reflect the sedimentary environment in river system. The impoundment of the Three Gorges Dam (TGD) is a doubtless inducement of the erosion of the middle and lower Changjiang (Yangtze) River channel. Compared the sediment samples data collected before TGD and after TGD, we dig out some rules which reflect the impact of the TGD. The results show that 1) caused by the erosion, the grain size of sediment coarsened intensively from Yichang to Chenglingji. Where closed to TGD, the tendency of coursing behaves more apparent. 2) The variation in grain size seems to be inconspicuous from Chenglinji to river mouth during 2002-2006. 3) The sediment component tends to be finer along the river downstream to river mouth.
  • 论文
    ZHU Rui-rui, ZHENG Hong-xing, LIU Chang-ming
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    The Wuding River Basin, which is one of the biggest catchments in the Loess Plateau, is dry and lack of water resources. In this paper, recharge-discharge relationship in the basin has been investigated using the daily streamflow records since the 1950s. It was estimated that the annual recharge of the basin varied from 11.38 mm to 15.69 mm. For different sub-catchments the ratio between recharge and precipitation ranged in 2.9%-4.7%, while the ratio between recharge and baseflow was 73.5%-86.8%. Baseflow is highly correlated with recharge. Spatially, the loess area has the largest recharge and recharge-precipitation ratio and the headwater area has the largest recharge-baseflow ratio, while the sandy area has the smallest. Temporally, groundwater recharge has decreased significantly, which consequently resulted at the significant reduction of baseflow. However, the decrease rate of baseflow is larger than recharge indicating the impacts of human activities like groundwater withdrawing.
  • 论文
    XIE Jian, LIU Jing-shi, DU Ming-yuan, WANG Zhong-yan
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    Altitudinal and temporal distribution of air temperature were analyzed, using an original data set, spanning from 1 Aug., 2006 to 31 Jul., 2007 from 9 automated weather stations set up along an altitudinal gradient from 4 300 to 5 500 m a.s.l., at a southern slope of Nyainqentanglha Mountains, Tibetan Plateau. Air temperature inversion was found typically during October to the following April. The mean perennial values of annually and monthly mean air temperature were estimated for various observational altitudes at the studied slope, based on the significant correlation between air temperatures at the observed slope and Damxung Weather Station, which has 44 years of continual meteorological record since 1963. According to the estimated mean perennial air temperature, the lower limit of the alpine permafrost was estimated at about 5 100 m a.s.l., which is 200 m higher than the previous value proposed in the frozen soil in China.
  • 论文
    LI Hui-min, LIU Hong-bin, WU Wei
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    The article researched the vegetation changes in the Three Gorges Reservoir Area of Chongqing through analysing the time series of NDVI data in 1998-2007, the relationship of the NDVI with meteorological factors, the change rate of NDVI and the relationship between NDVI altitude by using the 1 km SPOT/VGT-NDV I data smoothed by Savitzky-Golay filter. The results show that the annual NDVI variation in the Three Gorges Reservoir Area of Chongqing is relatively stable, while it decreases in the northeastern and southeastern areas and increases in the western area. Furthermore, the spatial and temporal changes of NDVI are mainly caused by temperature and precipitation. The temperature plays a more important role than precipitation in NDVI’s change, the altitude and NDVI also has a better correlation.
  • 论文
    YANG Yu-hong, YAN Bai-xing, SHEN Bo, CAO Hui-cong
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    The Songnen Plain in Northeast China is an important base of cash grain and soybean in China. Nonpoint source nutrient loads (TN, TP, NH3-N, NO3--N, PO43--P) to the water bodies were estimated using 137Cs nuclear tracing technique and field monitoring method. The annual mean erosion thickness of black soil in the typical slops is within 0.120-0.525 cm, and the erosion intensity is 1355.0-7558.2 t/km2 in last 40 years. The annual mean values of pollution loads per square kilometer were TN 1.43 t, NH3-N 15.01 t, NO3--N 8.51 t, TP 0.42 t, PO43--P1.85 t, respectively. Water dissolved inorganic nitrogen and phosphorus accounted for 0.51% of total nitrogen, and 0.12% of total phosphorus. Caesium-137trating technique is an differentive to traditional methods.
  • 论文
    XIA Rui, LI Yun-mei, WANG Qiao, XU En-hui, JIN Xin, WANG Yan-fei
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    Taking the six sections’ water quality monitoring data of Beijing-Hangzhou Grand Canal in Wuxi and SPOT-5 orthophoto images in July 2003 as the data source, this paper analyses the response relationship between land-use area proportion and the transit water quality. The result shows that the spatial change of the buffer distance which takes the monitoring section as center responds to the five water quality monitoring indexes. The canal water quality pollution is mainly affected by land use structure which is close to the river. So the agricultural effluent, commercial and industrial wastewater and effluent from large area of bare land which is made by living rubbish and construction refuse is an important reason to make the Beijing-Hangzhou Grand Canal water quality worse.
  • 论文
    YANG Hong-jin, HUANG Chun-chang, PANG Jiang-li, LI Yu-qin, MI Xiao-jian, ZHAO Ming
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    Through the analysis of macro- and micro-elements and their variations with XRF at the CCY loess-soil site, Ningxia Hui Autonomous Region, we obtain a number of geochemical parameters. There is a good comparison between these chemical parameters and magnetic susceptibility, frequency dependent susceptibility, which indicates that during the paleosol formation, the climate was warm and humid with abundant precipitation and greater eluviation, while during the loess accumulation, the climate was relatively cold and arid with weak pedogenesis. And the variation of elements can indirectly reflect the change of climate and pedogenic environment during the process of loess chemical weathering. Through the research of the activities of elements in CCY profile, it was found that Holocene loess in CCY only experienced primary process of chemical weathering characterized by leaching of Ca, Na, and not reached the secondary process characterized by leaching of K.
  • 论文
    ZHANG Ming-jun, ZHOU Ping, LI Zhong-qin, ZHAO Shu-hui, JIN Shuang
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    Simultaneous samples of aerosol and fresh snow were collected at Glacier No. 1 (4100 m a. s.l.), Tianshan Mountains, between April 16 to 23, August 5 to 14, and October 10 to 24, 2007. Aerosol and snow chemistry (including the species of Na+, NH4+, K+, Mg2+, Ca2+, Cl-, NO3- and SO42-) is analyzed and discussed. Major ion concentrations in aerosol samples change heavily with the total ionic burden averaging 86.22 neq/m-3 at standard temperature and pressure (STP). Interspecies aerosol relationships indicate the presence of NH4HSO4 and (NH4)2SO4 aerosol at Glacier No. 1 also with NH4NO3. High scavenging ratio values are found for all species except SO42-. Periods of increased concentrations in the aerosol are generally reflected by increased concentrations in the snow, and vice versa. Correlation coefficients between aerosol and snow for Ca2+, Mg2+, Na+, Cl-, K+ show that snow chemistry basically reflects changes in the chemistry of the atmosphere. There are no significant correlations between aerosol and snow samples for NH4+, NO3- and low correlation coefficient for SO42-.
  • 论文
    DONG Zhi-wen, LI Zhong-qin, ZHANG Ming-jun, WANG Wen-bin, WANG Fei-teng
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    Snow chemistry on the glaciers of high mountains is good indicator for atmospheric environment change research. During the summer of the years from 2004 to 2007, we measured the characteristics of snow chemistry in three snowpits of different altitudes on the Haxilegen glacier No.51 of Kuytun, the eastern Tianshan Mountains of China. Correlation analysis and sea-salt tracing methods were used in this study to find out the source of major ions and dust particles. Results showed that the insoluble dust micro-particles and major ions in the snow had obvious seasonal variation. During Asian dust period, the concentration was significantly high, but the concentration was relatively low during non-dust period, which may be caused by dust activities of central Asia. The major ionic concentration was Ca2+>SO42->NH4+>NO3-> Cl-> Na+>Mg2+>K+, Ca2+ was the dominate cation, and SO42- was the dominate anion. The ionic correlation coefficient analysis shows that all the ions have very good correlation coefficient except the NO3-. The glacier regions was mainly affected by dust activities. Moreover, the major ions, especially Na+, was significantly affected by the Ocean in the west, as the precipitation was mainly from the west, besides those partly originated from the dust sources of central Asian region.
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    WANG Wei-qi, ZENG Cong-sheng, TONG Chuan
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    Reviews on methane production and the reaction to sulfate in saline wetlands was made. The results showed that acetate and hydrogen, methylamine, methanol, trimethylamine, methionine were substrates of methane production in saline wetlands. Methane production potentials of tidal saline wetland were lower. The inhibition effects of sulfate on methane production was significant.Substrates, sulfate concentration, temperature and pH value controls the inhibition effects of sulfate on methane production, furthermore, salinity, quantity and activity of methane production bacteria were key factors controlling methane production.