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| 1 | 三江平原气候变暖的进一步认识:最高和最低气温的变化显示文摘利用三江平原17个站1951-2000年的平均最高、最低气温和气温日较差资料,采用线性倾向估计和几种突变检测方法,定量研究了最高、最低气温和气温日较差变化趋势的空间分布,比较了最高、最低气温变化特征的差异性。结合前期的相关研究结果,对研究区20世纪70年代中期以来的三江平原气候变暖过程和成因有了进一步的认识。1975-2000年的变暖时期主要由两个阶段构成:1975-1987年为第一阶段,以夜间升温为主要特征,相对应的是气温日较差明显减小,超过一定面积的湿地开垦是该阶段气候变暖的主要驱动力之一;1987-2000年为第二阶段,以白天和夜间同时升温且幅度相当,气温日较差没有明显的变化趋势为特点,这一阶段的升温是对全球气候变暖同步的区域响应。 | 闫敏华 陈泮勤 邓伟 梁丽乔 | 2005 | 生态环境2005，14，2： | 34 |
| 2 | 三江平原多级沟渠系统沉积物中铁的分布特征显示文摘以三江平原典型多级沟渠系统(毛渠-农渠-斗渠-支渠-干渠)为对象,研究了其0~60 cm沉积物全铁含量的空间分布特征.结果表明,多级沟渠系统中沉积物的平均铁含量为(3.02±0.10)×104mg.kg-1,各类型、各等级的沉积物铁含量具有极显著差异(F=6.261,p 0.001),最高值出现在农田斗渠(3.71×104mg.kg-1)中,而最低值出现在湿地斗渠(2.43×10^4mg.kg-1)中.整个多级沟渠系统沉积物各层的铁含量没有显著性差异(F=0.093,p=0.693),但与沟渠相邻湿地同深度土层的铁含量相比,沟渠沉积物0~10 cm层、10~20 cm层分别增加了51.96%、62.22%.铁虽然具有一定的可迁移性,其最大累积处仅能延伸到第三等级的斗渠中,而非逐级递增.由于湿地保护和气候干热化,现阶段本区含铁径流量有逐渐减少的趋势.沉积物各层铁含量沿沟渠类型和等级的递变揭示了铁输移的历史变迁. | 邹元春 吕宪国 姜明 郗敏 | 2009 | 环境科学2009，30，3： | 11 |
| 3 | CHARACTERISTICS OF ZONAL ANOMALY OF ANNUAL PRECIPITATION IN THE NORTHEASTERN CHINA显示文摘The characteristics of zonal anomaly and change rule of temporal distribution of annual precipitation in the northeastern China are revealed in this paper with EOF (Empirical Orthogonal Function) and REOF (Rotated Empirical Orthogonal Function) methods and results are drawn in the standard relief maps with GIS technology for practical application. Data used in the study were obtained from 208 meteorological stations over the northeastern China from 1961 to 2001. EOF results show that the first 3 loading vectors could give entire spatial anomaly structure of annual precipitation. In the Northeast Plain including the Songneng Plain and the Liaohe Plain, there is a regional compatibility (whether wet or dry) of annual precipitation change and this precipitation pattern has occurred since the late 1980s to the present. There also exist annual precipitation patterns of wet (or dry) in south and dry (or wet) in north and wet (or dry) in east and dry (or wet) in west. REOF results display 8 principal precipitation anomaly areas by the first 8 rotated loading vectors: the west plain, the Liaodong hills, the Sanjiang Plain, the Liaoxi hills, the Changbai Mountains, the Hulun Buir Plateau, the southwest plateau and the Liaodong Peninsula. | YANMin-hua DENGWei CHENPan-qin LIANGLi-qiao | 2004 | Chinese Geographical Science2004，14，4： | 2 |
| 4 | Petrological characteristics,geochemical feature and metallogenetic relation of alkaline-rich rocks in northwest of Yunan Province,China显示文摘The alkali-rich rocks,spreading along the suture zone of Jingsha River,refer to the alkali-rich porphyry rocks,which emplace during the Himalaya epoch in northwest of Yunnan Province,and consist of syenit,syenit porphyry,monzonite porphyry and granite porphyry.Petrological chemical analysis results suggest that silica is poor and aluminum is rich,and high potassium large ion lithophile elements(LILE),light rare earth element(LREE) and Sr are obviously detracted in these rocks.High field strength elements(HFSE) and heavy rare earth element(HREE) are depleted,especially Nb,Ta,P and Ti.δEu:0.09-1.64 shows that plagioclase does not appear fractional crystallization during the formation of alkali-rich rocks.δ34S,H and O isotopes and Pb isotopes suggest that ore-forming fluid is derived from the mantle,and Pb is possibly mixed by mantle,wall rock and crust.The age of Pb in alkali-rich rocks is about 250-220 Ma.The age of alkali porphyry rock(dykes) varies from 30 Ma to 50 Ma.Alkali rocks have strong metallogenetic relation.Au mineralization is associated to the alkali magmatic activities with a relatively high temperature,low pressure and high oxygen fugacity.However,copper mineralization is mainly associated with alkali-sub-alkali magmatic activities in a process of relatively low temperature,high pressure and lower oxygen fugacity. | 张德贤 戴塔根 | 2011 | Journal of Central South University2011，18，4： | 0 |
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