| 1. | Geographic environmental evolution in the qingdao coastal area under the influence of global change 全球变化影响下青岛海岸带地理环境的演变 |
| 2. | The strata and environmental evolution in the late quaternary in the chengdao area and modern yellow river delt coast 埕岛及现代黄河三角洲海域晚第四纪地层与环境演变 |
| 3. | Water - land resources utilization and environmental evolution in middle to lower reaches of heihe river basin during the past 2000 years 000年来黑河中下游水土资源利用与下游环境演变 |
| 4. | The research on eco - environmental evolution , control and adjustment for the arid land in western china : research progress and prospect 中国西部干旱区生态环境演变与调控研究进展与展望 |
| 5. | The studies to exhibit the sedimentary source in the east china sea during the last glacial age are of great significance to reveal the hydrologic situation of paleo - continent and paleo - ocean , climate change and environmental evolution 分析末次冰期东海沉积物来源,对揭示古陆、古海洋水文状况、气候变化和环境演化都有重要意义。 |
| 6. | As one of the typical environmental disasters at south strand plain in laizhou bay , occurrence , development and variation of salt - water intrusion have close relationship with paleo - environmental evolution since late pleistocene , and with modern environmental change and human activities 摘要通过对莱州湾南岸咸水入侵较严重地潍河下游地区晚更新世以来沉积特征及现代自然环境条件变化的分析,探讨了沉积相对咸水入侵产生及空间范围特征的环境机理。 |
| 7. | ( 3 ) combining experimental data of environmental evolution with high resolution with historical data , it is showed that some coupling relationships exist between evolution of human culture and evolution of soil formation in the weihe valley during holocene . during 8 500 - 3 100 a b . p . , ( 3 )通过将环境资源演变较高分辨率的实验数据资料和史料记载相结合,分析发现全新世以来,渭河流域人类文化的演进与成壤环境的演变之间存在着一定的耦合关系。 |
| 8. | The neogene is a key stage of terrestrial environmental evolution in yunnan . three stratigraphic sections including luhe ( late miocene ) , yangyi and longling ( late pliocene ) were selected to reconstruct vertical landscape of paleovegetation in these areas , based on palynological data . according to principle of the coexistence approach , seven quantitative paleoclimatic parameters of each deposit area were obtained by using meteorological data ( 1951 - 1980 ) of the distribution area of extant taxa found each palynoflora in china 晚第三纪是云南地区环境演变过程中的关键地质历史时段,本论文以晚第三纪晚中新世(吕合) 、晚上新世(羊邑和龙陵)地层中的孢粉为研究对象,结合同层位大化石植物证据,参照现代植被,恢复了云南三个化石出产地区的古植被垂直分布景观,并定性地描述了古气候;同时运用共存分析方法( theco - existenceapproach )定量化地重建了三个地区的古气候参数值;初步推测了沉积地可能的古海拔。 |
| 9. | With the widespread and profound impacts of global change on the natural elements and progress , the society and economy , and even the human activities , the study of global change has become one of the most active frontiers in the current earth science research field . especially , climatic and environmental changes of holocene and human history is a very important time scale of the study of global change . however , the geographic surroundings and the natural environment of the southern margin of tarim basin , which lies in the hinterland of eurasia continent , are so special that it is difficult to obtain the proxies indicating its environmental evolution 在多年来前人研究成果的基础上,本文通过尼雅剖面年代分辨率可达10a的沉积物质量磁化率、碳酸盐碳同位素、粒度等气候替代性指标及约特干剖面的地球化学元素、孢粉等气候指标信息的结果分析,并结合达木沟、塔格勒等剖面的成果及相关资料,得出以下结论: ( 1 ) 、南疆塔里木盆地南缘中全新世6 . 7 3 . 0kab . p .以气候温暖偏干的荒漠环境为总体特征。 |
| 10. | The quaternary environmental evolution of the beijing plain region mainly depends upon the neotectonics and palaeoclimatic changes , which controlled and influenced the distribution , evolution of depositional areas and uplifting erosional areas and changes of sedimentary types , and also the scale and scope of quaternary transgressions 冷暖交替的软体动物组合,反映了本区第四纪时古气候的变动特点。北京?通县平原地区的第四纪环境演变,主要取决于气候变化和新构造运动。 |