加强自然科学基金资助方向引导,推动陆地表层研究深化     

冷疏影  宋长青 《地球科学进展》2013,28(4):509-515

着重阐述了近10年来,为推动陆地表层研究深入发展,国家自然科学基金在重点发展领域、重大研究计划、重大项目、申请代码及学科分类体系细化等层面对资助方向的引导作用。  相似文献   

Advances of Soil Microbiology in the Last Decade in China   总被引：7，自引：0，他引：7  

Song Changqing  Wu Jinshui  Lu Yahai  Shen Qirong  He Jizheng  Huang Qiaoyun  Jia Zhongjun  Leng Shuying  Zhu Yongguan 《地球科学进展》2013,28(10):1087-1105

Soils are fundamental to preservation and sustainability of life-support system on Earth. Soils develop as the most dynamic and complex interface linking atmosphere, hydrosphere, lithosphere and biosphere. Soils harbor enormous diversities of microbial communities as the primary driving forces for global exchanges of matter and energy on our planet. Despite of its profound importance, the invisible soil microbes have for long been underappreciated. In the early 2000s, there has been growing awareness that soil microbiology has attracted huge interest from nonsoil scientists due to the introduction of three domain phylogeny. It is also known as tree of life theory which is widely recognized as the most accurate reflection of the relatedness of all organisms and provides us with a tool to classify and elucidate the largely untapped resource of soil microbial communities. In January 2005, the Department of Earth Sciences of National Natural Science Foundation of China organized a workshop of ‘Soil Biology and Soil Processes’ with focused discussion on soil microbiology research frontiers. The workshop outlined research priorities, cross disciplinary research opportunities, technological needs and potential breakthroughs within soil microbiology. This workshop has witnessed the rapid advances of soil microbiology in soil nutrient transformation, global environmental changes and environmental remediation over the last decade in China. This article will give a brief review on soil microbial researches in the past decade in China, present the status quo of funding system and highlight the challenge and opportunities for future soil microbiology in China.  相似文献   

中国斑岩铜矿与埃达克(质)岩关系探讨   总被引：16，自引：2，他引：14  

冷成彪  张兴春  陈衍景  王守旭  苟体忠  陈伟 《地学前缘》2007,14(5):0-0

对比研究了中国26个主要斑岩铜矿的地球化学特征和年代学,结果表明其中25个矿床与埃达克(质)岩有成因联系,且多数与玄武质下地壳熔融形成的埃达克岩(C型)有关,现有数据表明土屋-延东和普朗斑岩铜矿可能与俯冲板片熔融形成的埃达克岩(O型)有关。容矿斑岩的初始锶值为0.7034～0.7090,均大于洋中脊玄武岩和亏损地幔的初始锶值,多数与EMI的初始锶值接近,推测其源区或源岩主要为玄武质下地壳,少数为洋中脊玄武岩,并受到中、上地壳不同程度的混染,这与两类埃达克岩的源区基本一致。虽然埃达克质岩浆具有形成斑岩铜矿的巨大潜力,但并非所有埃达克岩都能成矿,不同岩体需具体分析。  相似文献   

Determination of internal pressure of synthetic fluid inclusions in the H2O-CH4 system using Raman spectroscopy     

Jing Leng 《岩石学报》2000,16(4)

Determination of internal pressure of synthetic fluid inclusions in the H_2O-CH_4 system using Raman spectroscopy  相似文献   

1999年我国天气气候特点   总被引：6，自引：1，他引：5  

孙冷 《气象》2000,26(4):20-24

１９９９年我国主要天气气候特点可概括为：大部地区冬春连旱,夏季南涝北旱,秋季旱渍并存。全国持续偏暖,但幅度已较１９９８年有所下降,而且阶段性变化也更趋明显,部分地区遭受了高温或低温霜冻危害。热带风暴生成和登陆我国的个偏省;沙尘暴异常偏早;风雹偏省,损失轻;雾日较多。  相似文献   

Evidence for solar forcing of climate variation from δ¹⁸O of peat cellulose     

Yetang Hong  Dongsheng Liu  Hongbo Jiang  Liping Zhou  J. Beer  Bing Hong  Yongxuan Zhu  Handing Li  Xuetian Leng  Xiaoguang Qin  Wang Yu  Qinghua Lin  Yiqiang Zeng 《中国科学D辑(英文版)》2000,43(2):217-224

There have been a number of investigations for examining the possible link between long-term climate variability and solar activity. A continuous δ¹⁸O record of peat cellulose covering the past 6 000 years and the response of climate variation inferred from the proxy record to solar forcing are reported. Results show that during the past 5 000 years the abrupt climate variations, including 17 warming and 17 cooling, and a serious of periodicities, such as 86, 101, 110, 127, 132, 140, 155, 207, 245, 311, 820 and 1 050 years, are strikingly correlative to the changes of solar irradiation and periodicity. These observations are considered as further evidence for a close relationship between solar activity and climate variations on time scales of decades to centuries.  相似文献   

试论气候异常对重大工程建设的影响   总被引：2，自引：0，他引：2  

黄朝迎  孙冷 《地理学报》2000,55(Z1):5-10

依据大量实例阐明了气候与重大工程建设的关系,以及气候异常变化对重大工程的影响,指出了在重大工程建设中因未考虑气候异常变化所带来的严重后果.提出在重大工程规划、设计和建设中应注意的气候灾害问题.  相似文献   

不同地区工程勘察的高分辨率地震反射探查   总被引：4，自引：0，他引：4       下载免费PDF全文

刘保金  张天航  冷欣荣 《地震工程学报》1999,21(1):55-61

通过４个实例介绍了利用高分辨率浅层地震反射技术在不同地区进行工程勘察的方法特点及资料特征．结果表明,浅层地震反射法在岩层划分、探测地下岩溶和隐伏断层等方面有独到作用,可为工程的设计和建设提供可靠的地质依据  相似文献   

海浪外观波数谱与谱宽度最优确定     

杨永增  张杰  冷秀华 《海洋科学进展》1999,(3)

本文将外频谱转化为外观波数谱并设计了计算处理格式,提出了一种谱宽度参量的优化方法,为进一步研究海浪特征资料提取谱值和应用奠定基础。数值试验验证了此方法的可行性,但在高海况下风浪过程复杂,优化出的谱宽度偏大,外观谱解析形式需进一步改进  相似文献   

Copula-based identification of the non-stationarity of the relation between runoff and sediment load     

Shengzhi Huang  Pei Li  Qiang Huang  Guoyong Leng 《国际泥沙研究》2017,32(2)

It is important to identify the non-stationarity in the relation between runoff and sediment load under the backdrop of the changing environment. This relation helps to further understand the mechanisms of runoff and sediment yield. A copula-based method was used to detect possible change points in the relation between runoff and sediment load in the Wei River Basin (WRB), China, where soil erosion is a very severe issue. The modified Mann-Kendall trend test method was applied to obtain the trends of runoff and sediment load spanning 1960–2010 at monthly and annual timescales. Finally, the causes of the identified non-stationarity of the relation between runoff and sediment load were roughly analyzed from the perspective of climate change and human activities. Results indicated that:(1) the runoff and sediment load in the Jinghe and Wei rivers were generally characterized by noticeably decreasing trends at both monthly and annual timescales;(2) both the Jinghe and Wei rivers had a common change point (2002), implying that the stationarity of the relation between runoff and sediment load in the Jinghe and Wei River was invalid; (3) human activities including increasing water consumption and growing application of soil conservation practices are dominant factors resulting in non-stationarity in the rela-tion between runoff and sediment load in the WRB. This study provides a new idea for identifying the non-stationarity of multivariate relation in the hydro-meteorological field under the background of the changing environment.  相似文献