对地球系统模式FIO-ESM同化实验中北极海冰模拟的评估   总被引：3，自引：0，他引：3  

舒启  乔方利  鲍颖  尹训强 《海洋学报》2015,37(11):33-40

本文评估了地球系统模式FIO-ESM(First Institute of Oceanography-Earth System Model)基于集合调整Kalman滤波同化实验对1992-2013年北极海冰的模拟能力。结果显示:尽管同化资料只包括了全球海表温度和全球海面高度异常两类数据,而并没有对海冰进行同化,但实验结果能很好地模拟出与观测相符的北极海冰基本态和长期变化趋势,卫星观测和FIO-ESM同化实验所得的北极海冰覆盖范围在1992-2013年间的线性变化趋势分别为-7.06×105和-6.44×105 km2/(10a),同化所得的逐月海冰覆盖范围异常和卫星观测之间的相关系数为0.78。与FIO-ESM参加CMIP5(Coupled Model Intercomparison Project Phase 5)实验结果相比,该同化结果所模拟的北极海冰覆盖范围的长期变化趋势和海冰密集度的空间变化趋势均与卫星观测更加吻合,这说明该同化可为利用FIO-ESM开展北极短期气候预测提供较好的预测初始场。  相似文献   

Chemistry of pyrites from Babaoshan iron and copper polymetallic ore deposit in Western Henan ProvinceEI北大核心CSCD     

Zhou D.  Bao Z.  Yao J.  Zeng L.  Zhao T. 《大地构造与成矿学》2015,(1):128-138

The Babaoshan iron and copper polymetallic deposit, which is located in Lushi county Henan province, is unique for its iron-predominated ore mineralization among all the Mesozoic porphyry metallogenic systems in the southern margin of the North China Craton. Pyrite is ubiquitous in the southern and western parts of the deposit. Their EMPA analyses indicated the contents of S and Fe are more than 90% in total, the contents of Cu and As of the pyrites vary considerably even within the same grain. The abrupt change suggests mixing of ore-forming fluid and upward magmatic vapors from the same magmatic-hydrothermal system is the major force to induce pyrite deposition. That As exist in two valence states, As3+ and As1-, revealed that the Babaoshan pyrite-forming fluid was oxidative originally and changed to be reductive subsequently. The oxygen fugacity fluctuation is a positive factor to the formation of the Babaoshan porphyry copper deposit. ©, 2015, Science Press. All right reserved.  相似文献   

哈雷彗星的彗发光谱     

谢光中  茶光伟  卢汝为  李晓渝  郝鹏九  鲍梦贤  张云 《中国天文和天体物理学报》1989,(2)

用云南天文台一米望远镜卡焦摄谱仪(f=175mm相机),在哈雷彗星的日心距分别为1.11AU和0.83AU时,作了两次彗发光谱观测,得到了典型的彗发光谱。本文绘出了各带系清晰的分子发射光谱图及认证结果。此外,本文还给出了彗发CN的(0—1)带(λ4216)和C_3的蓝紫发射(λ4052)及C_2的(2—0)带(λ4365)的强度比CN/C_3和CN/C_2,其值分别为CN/C_3=1.03,CN/C_2=1.00。最后,我们还将结果与其他作者在这次回归中所得到的结果进行了比较。  相似文献   

Fractal and Multifractal Properties of Geochemical Fields   总被引：12，自引：0，他引：12  

Shuyun Xie  Zhengyu Bao 《Mathematical Geology》2004,36(7):847-864

A fractal model, introduced by De Wijs to study the distribution, redistribution, or enrichment/depletion of element concentrations in a region, has become widely accepted. This paper uses it to simulate various geochemical fields for element concentration values. The frequency distribution and spatial pattern of the simulated values or concentrations are analyzed by the method of moments and the concentration–area (C–A) model. The spatial pattern of the original De Wijs model is shown to be intrinsically characterized by -shaped and symmetrical multifractal spectrum curves, whose center and width change systematically with the enrichment factors set in the simulation. The corresponding frequency distribution pattern on the log–log plot of frequency versus concentrations is called simple continuous multifractal (SCM) by the authors. In other experiments, when a De Wijs model is locally superimposed by another De Wijs model of different enrichment factors, the symmetry of the multifractal spectrum graph is broken and a different pattern of frequency distribution is found. It is referred to as highly accumulated continuous multifractals (HACM). Concentrations of 12 elements in 1448 rock samples from Shaoguan district, North Guangdong Province, South China, and 12 oil/gas indexes in surface soils from Sangtamu region, Tarim Basin, Northwest China, have been applied. The real geochemical fields, both metallic and oil/gas, are found to be remarkably compatible to those simulated patterns of De Wijs models with backgrounds of various enrichment and different degrees of superimposition, indicating that the frequency and spatial distribution patterns revealed by the authors are most possibly universal features of geochemical fields. It is particularly interesting to note that the major geochemical indicators of oil/gas geochemical fields are closer to the results of De Wijs models with a small enrichment factor, either with or without local superimposition, whereas those of the metallic geochemical field correspond more closely to De Wijs models with a background field of larger enrichment factors. The results obtained herein potentially have important implications in mineral and oil/gas resource assessment.  相似文献   

“干化蒸发”与“回灌重溶”——对鄂尔多斯盆地东部奥陶系蒸发岩成因的新认识   总被引：3，自引：0，他引：3       下载免费PDF全文

包洪平  杨承运  黄建松 《古地理学报》2004,6(3):279-288

鄂尔多斯盆地东部奥陶系发育巨厚的蒸发岩地层,已有不少学者对其成因提出了不同的假设。本文通过对该区蒸发岩微相分布规律、剖面结构及地球化学等特征的分析,提出该区蒸发岩形成于成盐盆地与外海周期性隔绝的“干化蒸发”条件下的新认识。首次提出用“回灌重溶”机制来解释厚层石盐岩中的泥质薄夹层的成因、各种石盐岩颜色的成因及蒸发岩剖面中缺乏干化蒸发晚期阶段的钾镁盐层的原因,并由此提出 “溶积层”的概念。微相分析表明,在形成蒸发岩的盐坳盆地东部的水下古地形隆起上,发育有堤坝状的礁或生物丘等生物建隆,其在地形上的隆起构成了盐坳盆地与外海的障壁,在海平面下降期间可使盐坳与外海完全隔绝而进入干化蒸发阶段,从而形成了石盐沉积;由海平面上升所造成的突发性海水回灌事件又使先成的石盐层部分溶解（回灌重溶）,并由于不溶残余物的富集成层（溶积层）而阻止了下伏石盐层的进一步溶解。这是该区蒸发岩地层中缺少典型干化证据的主要原因。本区奥陶系马家沟组碳酸盐岩与蒸发岩间互分布的地层层序结构特征,主要受控于区域海平面变化旋回,碳酸盐岩主要形成于海侵期和高水位期,蒸发岩则主要形成于低水位期。  相似文献   

晚玉木冰期台湾海峡成陆的证据   总被引：5，自引：0，他引：5  

蔡保全 《海洋科学》2002,26(6):51-54

依据台湾浅滩西部、澎湖台地和台中浅滩打捞出来的大量哺乳动物化石的研究结果并结合沉积物特征、海面变化和年代测定资料，认为晚玉木冰期台湾海峡曾是陆地，至少南部是这样，这时期台湾海峡全为浅海的观点与现有的证据不符。  相似文献   

Cytochalasin B induced triploidy in Penaeus chinensis     

Bao Zhenmin  Zhang Quanqi  Wang Hai  Dai Jixun 《海洋学报(英文版)》1994,13(2):261-267

ＣｙｔｏｃｈａｌａｓｉｎＢｉｎｄｕｃｅｄｔｒｉｐｌｏｉｄｙｉｎＰｅｎａｅｕｓｃｈｉｎｅｎｓｉｓ￥ＢａｏＺｈｅｎｍｉｎ，ＺｈａｎｇＱｕａｎｑｉ，ＷａｎｇＨａｉａｎｄＤａｉＪｉｘｕｎ（ＲｅｃｅｉｖｅｄＡｐｒｉｌ５，１９９３；ａｃｃｅｐｔｅｄＡｕｇｕｓｔ１...  相似文献   

Narrow and broad senses on salinity scale     

Bao Wanyou  Liu Ximin  Zhang Hao 《海洋学报(英文版)》2001,20(1):76-83

ＩＮＴＲＯＤＵＣＴＩＯＮＢｅｃａｕｓｅｓａｌｉｎｉｔｙｉｓａｎｅｓｓｅｎｔｉａｌｆａｃｔｏｒｉｎｏｃｅａｎｏｇｒａｐｈｉｃｓｔｕｄｉｅｓ ,ａｎｄａｎｉｍｐｏｒｔａｎｔｐａｒａｍｅｔｅｒｉｎｓａｌｔｃｈｅｍｉｃａｌｉｎｄｕｓｔｒｉｅｓａｎｄｍａｒｉｃｕｌｔｕｒｅａｓｗｅｌｌａｓｅｃｏｓｙｓｔｅｍ ,ｔｈｅｓａｌｉｎｉｔｙｄｅｆｉｎｉｔｉｏｎａｎｄｉｔｓｍｅａｓｕｒｅｍｅｎｔａｒｅｂｅｉｎｇｃｏｎｔｉｎｕｏｕｓｌｙｓｔｕｄｉｅｄ .Ｒｅｓｅａｒｃｈｅｒｓｈａｖｅｂｅｅｎｃｏｎｓｔａｎｔｌｙｗｏｒｋｉｎｇ…  相似文献   

日本盘鲍×皱纹盘鲍子代杂种优势的RAPD分析   总被引：16，自引：3，他引：16  

万俊芬  汪小龙  潘洁  李冰  李祯  包振民  燕敬平  方建光 《中国海洋大学学报(自然科学版)》2001,31(4):506-512

本文通过对日本盘鲍 (D)、皱纹盘鲍 (H)及其二者的正反杂交子代 D♀× H♂ (DH)、D♂× H♀ (HD)四样本的基因组 DNA进行 RAPD标记分析。探讨了杂种优势产生的分子遗传机制。从 4 0个随机引物 (OPK,OPV系列 )中筛选出 12个引物进行扩增 ,共得到 113条清晰稳定的扩增带 ,多态率占 4 3.3%。其中四群体各有其特异扩增位点。另外 D与 DH,H与 HD及 D与 DH,HD等间亦存在共享片段。四群体内相似性指数各自为 0 .798(H)、0 .799(D)、0 .777(HD)、0 .788(DH)。可见正反杂交子代群体内相似性指数皆低于两亲本 ,这表明杂种子代基因组发生的变异更大些。皱纹盘鲍与其正反杂交子代的相对遗传距离分别为 0 .0 76 ,0 .0 95,而日本盘鲍与其正反杂交子代的相对遗传距离分别为 0 .0 31,0 .0 33,前者明显大于后者 ,这表明杂交子代与两亲本的遗传距离不是对等的 ,而是更偏向日本盘鲍。  相似文献   

东方对虾消化系统解剖和组织学的研究     

陈宽智  鲍鹰  何伟宏 《中国海洋大学学报(自然科学版)》1988,(1)

本文对东方对虾消化道及肝胰脏进行大体解剖和组织学观察,并将其结构与功能同其它主要十足动物作比较。 前肠和后肠内壁有几丁质层覆盖,中肠则没有。食道壁向四个角落内褶,在其表皮层之下的结缔组织中充满皮肤腺,环肌层连续,纵肌成束分散排列:胃的组织学结构除没有皮肤腺分布外,大体与食道相似。中肠从胸部延伸到第六腹节前区,约占消化道总长的60％,其上皮是一层柱状细胞,环肌层薄,纵肌成束分散排列;中肠前,后盲囊分别从中肠的前端和后端发出。后肠是一短管,内壁突出四个大的垫状隆脊,肛门开口于尾节腹面,和食道一样后肠壁分布大量皮肤腺:后肠上皮由单层柱状细胞组成,环肌层连续,纵肌在后肠前段成束分散排列于环肌之下,在后段则在环肌层之上。肝胰脏由许多分支肝小管构成,肝小管内壁为单层柱状上皮,中央为管腔:肝管细胞分为分泌细胞、吸收细胞、纤维细胞和原始细胞四种。原始细胞是一种未分化的细胞,分布于肝小管末端。  相似文献