共查询到20条相似文献，搜索用时 140 毫秒
1.
定西市气候资源特点与开发利用 总被引：4，自引：0，他引：4
对定西市近50年的气候资源进行分析.结果表明定西市具有光照充足、光能资源丰富、气候温凉、热量分布差异大、降水少变率大、光热水匹配基本合理等特点.根据其气候资源的特点,提出了农业气候资源开发利用途径. 相似文献
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峨眉山旅游气候研究 总被引：6，自引：0，他引：6
郭洁 《成都信息工程学院学报》2002,17(2):109-115
气候资源是旅游事业开发中极为重要的一种自然资源，通过分析峨眉山地区基本气候特征，以及特色景观出现的季节、时段和条件，得出峨山山旅游气候的优势，提出要大力发展峨眉山的旅游业，应充分利用和开发旅游气候资源。 相似文献
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马志飞 《国土资源科普与文化》2017,(2):32-35
<正>宝石,作为矿物中难得的精品,历经亿万年水与火的"洗礼",以其最美丽的颜色和姿态展现在人类面前。然而,仅凭颜色来辨别宝石很不可靠,一种宝石可以具有很多种不同的颜色,而不同的宝石也可以具有相同或相似的颜色,但是如果我们仔细观察宝石的光影变化,并从中发现一些特殊的现象,便可快速辨别宝石。总的说来,宝石中的光学效应主要包括火彩效应、变彩效应、猫眼效应、星光效应、荧光效应和磷光效应等,下面让我们一一辨别。 相似文献
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"十三五"时期,在"中国基本资源国情没有变、资源在发展大局中的地位和作用没有变、资源环境约束趋紧的总体态势没有变"的"三不变"背景下,建设用地快速扩张的时代已经过去,用地的需求结构正在发生重大变化。单纯依赖增量土地的发展模式已经难以为继,自然资源进入了存量挖潜、提质增效的新阶段。 相似文献
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文章在简述牛角塘锌矿床的地层、构造特征基础上,重点分析其矿(化)体、矿石质量、围岩蚀变、激电中梯等方面的特征,总结其成矿控制条件,依次对找矿潜力区进行划分,认为牛角塘锌矿床外围具有较大的找矿潜力。 相似文献
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资源与环境,是人类赖以生存的基本条件.今年,我国把"善待地球--从节约资源做起"定为"世界地球日"的主题,体现了党和政府直面资源环境危机,树立科学发展观的勇气和决心.在人类历史的发展进程中,生产技术方式的重大变革导致了人与自然的关系发生根本性变化.现代人类在高速发展自己的物质文明,由于无视资源、环境的平衡与和谐,在取得辉煌成就的同时,也付出了巨大的代价. 相似文献
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人类的经济活动包括两个方面.一方面在为社会创造财富,即所谓"正面效应";另一方面又对社会生产力的发展起着阻碍作用,即所谓"负面效应".这种负面效应又集中表现在两个方面,一是对自然资源的开发和利用,造成自然资源的大量耗减,进而引发自然资源的质量下降和耗竭性资源的枯竭等问题;二是通过经济活动向生态环境排泄废弃物以及诸如森林过伐、草原过牧、过度开垦等使生态环境从质量上日益恶化. 相似文献
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激电中梯是寻找金属硫化物富集体的有效地球物理勘探电法,该文主要解析了激电中梯测量在瑙木浑沟口地区寻找金矿勘查中的应用。通过在区内选择合适位置开展激电中梯测量并进行数据解译,圈定5处激电异常靶区结合探矿工程查证,获得了较好的异常解释效果。研究区采用激电中梯测量与探矿工程相结合,共划分2个矿化蚀变带9条金矿体,金矿石类型为黄铁矿化、方铅矿化碎裂岩型,主矿体Ⅱ-5号金品位(3.93～5.31)×10~(-6),平均品位4.92×10~(-6),主要有黄铁矿化、黄铜矿化、方铅矿化、闪锌矿化,金矿体主要赋存于NW向构造蚀变破碎带中,金与金属硫化物关系密切。因此,认为该区金矿勘查利用激电中梯测量圈定激电异常,找矿效果较好。 相似文献
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《山地科学学报》2020,17(6):1491-1508
The scientific analyses of the spatial patterns of regional eco-environment livability, along with the explorations of the correlations between ecoenvironments and population and economic activity distributions, are of major significance in the guidance of the coordinated development between social economies, natural resources, and environments. In this study, the topography, climate,hydrology, land cover, air quality, and the dangers presented by natural hazards in the study area were investigated in order to establish an evaluation model for the regional eco-environmental livability. Then,the observed spatial patterns and regional differences in the eco-environmental livability, as well as their relationships with the distributions of population and economic activities in Zhejiang Province, were investigated. The results showed that the ecoenvironmental livability in Zhejiang Province displayed a gradual decreasing trend from southwest to northeast, as well as from the mountains to the hills, valleys, and plains areas. During the compartmentalization of the eco-environmental livability, it was observed that the lowest livable area covered the largest population, accounting for approximately 29.64% of the total population in the study area. The higher livable areas covered the widest land areas, accounting for approximately 26.15% of the total area. Moreover, it was found that the eco-environmental livability in the mountain areas was higher than that in the plain areas in Zhejiang Province. Furthermore, the ecoenvironmental livability was found to have a significant exponential relationship with the population and GDP densities of Zhejiang Province,with the R~2 of the curve-fittings reaching 0.835 and 0.656, respectively. However, it was determined that the coefficient of the exponential function was negative, which indicated that a strong negative relationship existed between the eco-environmental livability and densities of the population and economic activities. It was assumed that the impacts of anthropogenic factors were the fundamental causes of this negative correlation. This study introduced two new factors(air quality and natural hazards) into the evaluation framework of eco-environmental livability.As a result, a more comprehensive model was established for the evaluation of eco-environmenta livability in certain segments of the study area Additionally, the correlation between ecoenvironment livability and human activities was discussed in-depth, which can potentially provide theoretical and practical guidance for the implementation of eco-livability in China, and possibly even those of other vast developing countries. 相似文献
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本文以三峡库区腹地的部分地区为典型样带,利用遥感数据的时效性和区域性优势,结合常规气象数据,定量反演样带地表潜热通量,并对比验证遥感反演方法的可行性和可靠性。结果表明：潜热通量在不同地表覆被状况下呈现较大差异,城镇居民区和无植被覆盖区一般在20~80W·m-2;人工林场、山区森林及草灌和山前农作区在180~280W·m-2;水体则分布在420~470W·m-2,潜热通量整体呈现出随地表覆被变化而变化的空间异质性。此外,由于库区地表覆被类型多样,并受到山区起伏地形地貌的影响,潜热通量在空间分布上的地形分异特征也较显著。 相似文献
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We developed a vegetation geo-climatic zonation incorporating the zonal concept, gradient and discriminant analysis in Wasatch Range, northern Utah, USA. Mountainous forest ecosystems were sampled and described by vegetation, physiographic features and soil properties. The Snowpack Telemetry and National Weather Service Cooperative Observer Program weather station networks were used to approximate the climate of sample plots. We analysed vegetation and environmental data using clustering, ordination, classification, and ANOVA techniques to reveal environmental gradients affecting a broad vegetation pattern and discriminate these gradients. The specific objective was to assess and classify the response of the complex vegetation to those environmental factors operating at a coarse-scale climatic level. Ordination revealed the dominant role of regional, altitude-based climate in the area. Based on vegetation physiognomy, represented by five tree species, climatic data and taxonomic classification of zonal soils, we identified two vegetation geo-climatic zones： （1） a montane zone, with Rocky Mountain juniper and Douglas-fir; and （2） a subalpine zone, with Engelmann spruce and subalpine fir as climatic climax species. Aspen was excluded from the zonation due to its great ecological amplitude. We found significant differences between the zones in regional climate and landformgeomorphology/soils. Regional climate was represented by elevation, precipitation, and air and soil temperatures; and geomorphology by soil types. This coarsescale vegetation geo-climatic zonation provides a framework for a comprehensive ecosystem survey, which is missing in the central Rocky Mountains of the United States. The vegetationgeoclimatic zonation represents a conceptual improvement on earlier classifications. This framework explicitly accounts for the influence of the physical environment on the distribution of vegetation within a complex landscape typical of the central Rocky Mountains and in mountain ranges elsewhere. 相似文献
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Vikram S. Negi Rakesh K. Maikhuri Dalbeer Pharswan Shinny Thakur Pitamber P. Dhyani 《山地科学学报》2017,14(2):403-416
The Himalaya represents a vast mountain system and globally valued for its significant role in regulation of global as well as regional climate that has direct impact on biodiversity and ecosystem services crucial for sustenance of millions of people in Himalaya and adjoining areas. However, mountain regions worldwide are impacted by climate change and at the same time represent distinctive area for the assessment of climate related impacts. Climate change impacts in Himalayan region have its implications on food production, natural ecosystems, retreat of glacier, water supply, human and animal health and overall human well being. The livelihood and food security of the people inhabited in region largely depend on climate sensitive sectors i.e. agriculture, livestock, forestry and their interlinkages with each other, and has the potential to break down food and nutritional security as well as livelihood support systems. People’s perception and understanding of climate can be an important asset when it comes to adaptation to climate change impact; however it is not taken into consideration for the development of policy design and implementation of modern mitigation and adaptation strategies by governments and other civil society organizations. The knowledge of local people and farming communities for rural landscape management and sustainable use of bioresources is gaining credence as a key strategy to cope up with the climate change. Therefore, the present study analyzes the indigenous knowledge of local people and their perceptions on climate change, and also documented adaptation approaches at local level in mountain ecosystem of western Himalaya. The study could be useful to policy makers to design appropriate adaptation strategies to cope up with the impacts of climate change. 相似文献
15.
秦巴山区植被覆盖与土壤湿度时空变化特征及其相互关系 总被引：2，自引：0，他引：2
基于2001-2014年MODIS-NDVI和MODIS-LST数据,利用温度植被干旱指数对土壤湿度进行遥感反演,分析了秦巴山区植被覆盖与土壤湿度时空变化特征及其相互关系。研究发现：① 秦巴山区植被覆盖与土壤湿度均呈增加趋势;② 植被覆盖整体水平较高且表现出“四周低,中间高”的空间分布特征,土壤湿度整体表现出“北低南高”的空间分布特征,大体上二者呈现出空间分布正相关性;③ 植被改善趋势表现明显,显著改善区分布分散,无明显集中区域,退化区域主要集中于北部渭河沿岸及东部边缘少量地区;土壤湿度增长态势明显,增大区分布于除西北边缘及东北边缘外的几乎整个研究区中,减小区域面积小且大部分表现不显著;④ 秦巴山区植被覆盖与土壤湿度时空变化上呈现出明显的正相关性,其中69.71%的区域表现出土壤湿度增大-植被覆盖改善的特征,分布于研究区除四周边缘地带外的大部分地区。 相似文献
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蔡运龙 《中国地理科学(英文版)》1997,7(4):289-301
Globalclimatechangeanditspotentialinlliactsonhumanaffairshavebeenthesubjectofconsiderablediscussionwithintheaca相似文献
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利用射洪县近30年来的气温、降水、相对湿度、云量、日照时数等气象要素资料,应用多种统计方法分析了近30年来射洪县的区域气候特征.结果表明,射洪年平均温度在1986年左右发生转折性变化,气温明显变暖.而年降水量总体上以波动变化为主,在20世纪80年代中后期有较为明显的减少.降水量与年平均温度的突变年代类似,但变化趋势正好相反,说明90年代以后射洪的气候向暖干型转变.各气象要素的综合分析表明,随着全球气候变暖,射洪区域气候变化趋势不容乐观:相对湿度的减少导致降水减少,而温度则在进一步上升,低云量的增加和日照时数的减少,使得阴天寡照加剧.射洪区域气候变化与当地诸如人口增长,城市扩大等人类活动,以及农业生态之间均存在密切联系. 相似文献
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A STUDY ON THE ECOLOGICAL CLIMATES OF SOME FAMOUS TEA GROWING AREAS IN HIGH MOUNTAINOUS REGIONS OF CHINA 总被引：1，自引：0，他引：1
黄寿波 《中国地理科学(英文版)》1991,1(2):121-128
The tea tree [Camellia sinensis (L) Kuntze] is one of the world's economic crops. It is an especially important crop for southern China. Environmental factors related to the tea yield and quality in some high mountain areas of China are identified in this paper. These factors are: geology, topography, climate, hydrology, soil and vegetation. Climatological factors are the most important. Using data collected from meteorological stations which are situated at the summit and the base of high mountains, this paper discusses ecological climatic problems in growing tea in China. The ecological climatic characteristics of the famous tea areas mainly included are as follows: more . amounts of clouds and fog, less percentage of sunshine, abundant rainfall and high relative humidity in the air, temperatures that rise and fall slowly, daily and annual temperature ranges that are smaller, more days that are suitable for tea growing and low wind speeds in the lee-sides and valleys of mountains. All of these factors 相似文献
19.
Comparison and effects of different climate-vegetation models in areas of complex terrain under climate change 总被引：1，自引：0，他引：1
Identifying the impacts of climate change is important for conservation of ecosystems under climate change, particularly in mountain regions. Holdridge life zone system and K?ppen classification provide two effective methods to assess impacts of climate change on ecosystems, as typical climate-vegetation models. Meanwhile, these previous studies are insufficient to assess the complex terrain as well as there are some uncertainties in results while using the given methods. Analysis of the impacts of the prevailing climate conditions in an area on shifts of ecosystems may reduce uncertainties in projecting climate change. In this study, we used different models to depict changes in ecosystems at 1 km × 1 km resolution in Sichuan Province, China during 1961–2010. The results indicate that changes in climate data during the past 50 years were sufficient to cause shifts in the spatial distribution of ecosystems. The trend of shift was from low temperature ecosystems to high temperature ecosystems. Compared with K?ppen classification, the Holdridge system has better adaptation to assess the impacts of climate change on ecosystems in low elevation(0–1000 m). Moreover, we found that changed areas in ecosystems were easily affected by climate change than unchanged areas by calculating current climate condition. 相似文献
20.
Elena Babushkina Liliana Belokopytova Dina Zhirnova Anna Barabantsova Eugene Vaganov 《山地科学学报》2018,15(11):2378-2397
In mountain ecosystems, plants are sensitive to climate changes, and an entire range of species distribution can be observed in a small area. Therefore, mountains are of great interest for climate-growth relationship analysis. In this study, the Siberian spruce’s (Picea obovata Ledeb.) radial growth and its climatic response were investigated in the Western Sayan Mountains, near the Sayano-Shushenskoe Reservoir. Sampling was performed at three sites along an elevational gradient: at the lower border of the species range, in the middle, and at the treeline. Divergence of growth trends between individual trees was observed at each site, with microsite landscape-soil conditions as the most probable driver of this phenomenon. Cluster analysis of individual tree-ring width series based on inter-serial correlation was carried out, resulting in two sub-set chronologies being developed for each site. These chronologies appear to have substantial differences in their climatic responses, mainly during the cold season. This response was not constant due to regional climatic change and the local influence of the nearby Sayano-Shushenskoe Reservoir. The main response of spruce to growing season conditions has a typical elevational pattern expected in mountains: impact of temperature shifts with elevation from positive to negative, and impact of precipitation shifts in the opposite direction. Chronologies of trees, growing under more severe micro-conditions, are very sensitive to temperature during September-April and to precipitation during October-December, and they record both inter-annual and long-term climatic variation. Consequently, it would be interesting to test if they indicate the Siberian High anticyclone, which is the main driver of these climatic factors. 相似文献