快速城市化地区建设用地演变驱动力研究——以深圳市龙岗区为例

在综述国内LUCC驱动力研究的基础上,确定了驱动因子.以深圳市龙岗区为例,基于非线性的Logistic模型,分析研究了建设用地演变的驱动力.     

川滇地区地壳应变场的GPS与地震矩张量联合反演研究

利用川滇地区1903～2003年间的84个地震矩张量和1998～2004年间214个GPs站速度观测值.采用方差分量估计方法确定联合反演中地震矩张量与GPS站速度值之间的权比例因子,计算分析了川滇地区的地壳应变场.结果表明:①采用方差分量估计确定联合反演中权比例因子的方法,得到的GPs站速度观测值的权比例因子为0.833,较地震矩张量的权比例因子0.167大,充分体现出分布相对合理的高精度GPS观测值在反演中的重要性;②川滇地区的应变场大致表现出如下的特征:主应变方向在30°N以北的区域为东西向;30°N以南、100°E以西的区域为北东向;30°N以南、100°E以东的区域为北西向.     

厦门西海域表层沉积物中多环芳烃含量分布及生态风险评价

2004年11月30日至12月1日连续两天采集厦门西海域10个站位表层沉积物样品,参照美国EPA标准方法及采用气相色谱与质谱联用(GC/MS)技术,对表层沉积物样品中的多环芳烃(PAHs)进行测定分析.结果表明,厦门西海域表层沉积物样品中16种PAHs的总含量为198.2-1061.6 ng·g-1,平均值为723.51 ng·g-1,能检出的PAHs均以2-4环的芳香物为主;10个站位中X1、X2、X3、X6及M2站位的PAHs主要来源于化石燃料的不完全燃烧,其他站位以石油泄漏为主要来源.对PAHs的生态风险评价结果表明,厦门西海域表层沉积物中PAHs的环境毒性相对较低,说明该海域表层沉积物中PAHs对生物的危害程度较轻.     

利用GPS研究新疆天山地区构造块体变形

利用GPS解算软件GAMIT/GLOBK将东天山--西天山多年观测的GPS重复测量成果进行系统处理,探讨了GPS与地球动力学的关系、现状,以及天山地区作为新生代构造演化的结果,它的区域地质构造背景,地震地质学研究和天山新生代构造变形的地球动力学问题.     

The application of hyperspectral remote sensing to coast environment investigation

Requirements for monitoring the coastal zone environment are first summarized. Then the application of hyperspectral remote sensing to coast environment investigation is introduced, such as the classification of coast beaches and bottom matter, target recognition, mine detection, oil spill identification and ocean color remote sensing. Finally, what is needed to follow on in application of hyperspectral remote sensing to coast environment is recommended.     

A culture-dependent survey of thermophilic bacteria from hot springs in Xiamen area in China

Microbes are believed to play important roles in ecosystem function in many environments. The hot springs of Xiamen Island are close to the Xiamen Sea, and may have some characteristics different from those of inland hot springs. Microbes living in the hot springs of Xiamen may have new characteristics. However, little is known about microbial communities of hot springs close to the Xiamen Sea. A culturedependent survey of microbial population in the Xiamen hot springs was performed by using an approach combining total cellular protein profile identification and 16S rRNA gene sequencing. A total of 328 isolates of bacteria were obtained from liquid and sediment samples from the Xiamen hot springs, including neutrophilic thermophilic bacteria and moderately thermophilic acidophiles. Neutrophilic thermophilic bacteria, which grow at a temperature range of 55—90℃ including Rhodothermus marinus (Strain 1), Thermus thermophilus (Strain 2), Thermus thiopara (Strain 3), Geobacillus stearothermophilus (Strain 4), Geobacillus thermoleovorans (Strain 5), and Pseudomonas pseudoalcaligenes (Strain 6), were recovered by 2216E plates. Moderately thermophilic acidophiles, which can grow at temperatures above 50℃ and a pH range of 1.8—3.5 such as Alicyclobacillus acidoterrestris (Strain 8), Sulfobacillus acidophilus (Strain 9), and Sulfobacillus thermosulfidooxidans (Strain 10), were isolated on selective solid medium containing sulfur and Fe2+. Among these strains, Rhodothermus marinus, Thermus thermophilus and Geobacillus stearothermophilus are not only thermophiles, but also halophiles. One bacterium strain (Strain 6) shared 99% nucleotide sequence homology with Pseudomonas pseudoalcaligenes on the 16S rRNA gene sequence, but was quite different from Pseudomonas pseudoalcaligenes in biological characteristics, suggesting that it may represent a novel thermophilic species. Results indicated that various species of neutrophilic thermophiles and moderately thermophilic acidophiles were widely distributed in the Xiamen hot springs and that Rhodothermus marinus and Thermus thermophilus dominated the cultivable microbial community.     

西湖凹陷平北地区平湖组基于地震多属性的储层预测

始新统平湖组是东海西湖凹陷平北地区最重要的油气储层,但受资料条件的限制,应用常规方法无法进行精细的储层预测,制约了研究区的油气勘探部署和进程。应用地震多属性分析技术,结合测井曲线、岩心、岩性及区域地质资料,对平北地区平湖组的岩相进行了精细解释,并对有利目标区进行了初步预测,结果表明,平北地区平湖组发育潮汐控制的三角洲相和潮坪相两种类型的沉积相,并以三角洲相内的储层发育,砂体连片性好,工区西南部三角洲前缘相发育区为油气勘探的有利目标区。     

努力开创港海经济新时代

射阳位于江苏沿海中部地区,海洋资源十分丰富,沿海开发前景非常广阔。6月10日,国务院讨论通过《江苏沿海地区发展规划》,为加快沿海开发提供了千载难逢的大好机遇。最近按照省、市部署要求,射阳县组织20多个工作组就重点工程、重大项目、重要事项,和国家、省、市几卜个部门进行对接争取,很多重大事项正在落实之中。当前正在重抓基础设施工程,尤其是港口建设、道路工程建设;     

南海及其周缘地区全新世海平面遗迹的构造含义

通过对海南岛海岸带野外考察,在文昌市铜鼓岭石头公园观察到高程为30m的海平面遗迹,在东方市黄流镇观察到高程为25~35m的海平面遗迹,在三亚市鹿回头观察到高程为2.5m的海平面遗迹。综合研究前人在该区关于海平面变化的研究成果,得出如下几点初步认识:(1)南海及其周缘地区中全新世以来海平面呈下降趋势,海平面最高位置出现在7000a左右、高于现代海平面3m左右的位置;(2)南海中全新世以来海平面遗迹所揭示的古海平面高程的差异性是古海平面本身持续下降和该区地壳差异性垂直运动共同作用的结果;(3)南海及其周缘地区中全新世期间中央海盆及其西缘的珠江口、红河、湄公河和昭披耶河4个河流三角洲地区为构造沉降区,而南海周缘的台湾岛、雷州半岛、印支半岛、南马来半岛、爪哇岛和苏拉威西岛6个地区为构造抬升区,抬升幅度最大的地方在台湾岛。     

Identification of CO2 disposal locations in an ocean general circulation model of the North Pacific

A basinwide ocean general circulation model of the North Pacific is used to identify which location is more efficient for ocean CO2 sequestration in the North Pacific. Four injection depths at each one of fifteen locations are chosen. In terms of effectiveness index (EI) and escape factor (EF), it is clear that the effectiveness increases with increasing latitude at the end of the 50 a injection period. Sitebysite differences in the EI can be over 9% for the 1 000 m injection depth in the western North Pacific at the end of 50 a of continuous injection. The difference is much larger for the 500 m injection. The difference decreases with increasing injection depth. However, the sitebysite difference is small for the injection in the eastern North Pacific. The sequestration is more efficient for the injection in the east than in the west. For the 500 m injection depth, the difference in effectiveness between the west and the east is over 10% at the end of 50 a injection period. The largest concentration of sequestered CO2 increases with increasing injection depth. For the injection in both the western and central North Pacific, the largest exchange flux always appears to be at about 42°N, 150°E, whereas for the injection in the eastern area the large flux appears to be in the equatorial region (120°W).