潮汐对瞬态气候响应模拟的影响研究     

于溢  刘海龙  林鹏飞  兰健 《海洋学报(英文版)》2020,39(1):52-62

In this study, the impact of oceanic processes on the sensitivity of transient climate change is investigated using two sets of coupled experiments with and without tidal forcing, which are termed Exp_Tide and Exp_Control,respectively. After introducing tidal forcing, the transient climate response(TCR) decreases from 2.32 K to 1.90 K,and the surface air temperature warming at high latitudes decreases by 29%. Large ocean heat uptake efficiency and heat storage can explain the low TCR in Exp_Tide. Approximately 21% more heat is stored in the ocean in Exp_Tide(1.10×10~(24) J) than in Exp_Control(0.91×10~(24) J). Most of the large ocean warming occurs in the upper 1 000 m between 60°S and 60°N, primarily in the Atlantic and Southern Oceans. This ocean warming is closely related to the Atlantic Meridional Overturning Circulation(AMOC). The initial transport at mid-and high latitudes and the decline in the AMOC observed in Exp_Tide are both larger than those observed in Exp_Control. The spatial structures of AMOC are also different with and without tidal forcing in present experiments. The AMOC in Exp_Tide has a large northward extension. We also investigated the relationship between AMOC and TCR suggested by previous studies using the present experiments.  相似文献   

Seasonal Variability of Near-Surface Heat Budget of Selected Oceanic Areas in the North Tropical Indian Ocean   总被引：1，自引：0，他引：1  

Chithra Shaji  Satoshi Iizuka  Tomonori Matsuura 《Journal of Oceanography》2003,59(1):87-103

The results obtained from an Ocean General Circulation Model (OGCM), the Modular Ocean Model 2.2, forced with the National Center for Environmental Prediction/National Center for Atmospheric Research reanalysis data, and observational data have been utilized to document the climatological seasonal cycle of the upper ocean response in the Tropical Indian Ocean. We address the various roles played by the net surface heat flux and the local and remote ocean dynamics for the seasonal variation of near-surface heat budget in the Tropical Indian Ocean. The investigation is based in seven selected boxes in the Arabian Sea, Bay of Bengal and the Equatorial Indian Ocean. The changes of basin-wide heat budget of ocean process in the Arabian Sea and the Western Equatorial Indian Ocean show an annual cycle, whereas those in the Bay of Bengal and the Eastern Equatorial Indian Ocean show a semi-annual cycle. The time tendency of heat budget in the Arabian Sea depends on both the net surface heat flux and ocean dynamics while on the other hand, that in the Bay of Bengal depends mainly on the net surface flux. However, it has been found that the changes of heat budget are very different between western and eastern regional sea areas in the Arabian Sea and the Bay of Bengal, respectively. This difference depends on seasonal variations of the different local wind forcing and the different ocean dynamics associated with ocean eddies and Kelvin and Rossby waves in each regional sea areas. We also discuss the comparison and the connection for the seasonal variation of near-surface heat budget among their regional sea areas. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

鱼类生长激素的异源表达、应用及安全性评价   总被引：3，自引：0，他引：3  

张学成  刘顺梅  臧晓南 《中国海洋大学学报(自然科学版)》2007,37(6):939-946

鱼类生长激素对鱼的生长发育起着重要的调节作用，能促进鱼体快速生长，提高饵料转化率，在水产养殖业中具有重大应用价值。转生长激素基因鱼具有快速生长效应，可以缩短养殖周期，降低养殖成本和风险。鱼类生长激素基因异源表达体系的建立和发展，使获得大量廉价的鱼类生长激素产品成为可能，为鱼类养殖业新型饵料添加剂的研制开辟了新的途径。本文综述了转生长激素基因鱼和鱼类生长激素基因的异源表达两方面的研究及其安全性评价。  相似文献   

长江中下游6月份降水的一个预报指标     

赵永平  陈永利 《海洋科学》1995,19(1):39-42

根据１９６３－１９９２年嵊山海洋站２月海气感热输送和２２ａ太阳磁周期与降水的关系，提出了一个长江中下游６月降水的综合预报指标，用此指标，对１９９３年６月长江中下游降水进行回报，结果与实况一致。  相似文献   

黄条鰤贮藏挥发性化合物的研究     

林洪  薛长湖  李兆杰  楼伟风  陈修白 《中国海洋大学学报(自然科学版)》1995,(4)

用气相色谱仪和气—质联机等方法对黄条鱼师的腐败挥发性化合物进行了定性和定量分析。这将有利于对黄条做一步的生化性质分析和制定其鲜品的国家标准。样品在２５℃贮藏５ｄ期间，测定了某些化学指标。结果表明在贮藏１ｄ后，鱼肉变腐臭，挥发性碱基化合物三甲胺和二甲基在贮藏中增加。在５ｄ的贮藏期间发现的挥发性有机酸包括乙酸、丙酸、丁酸、异丁酸、戊酸、异成酸，并且它们的含量不断增加，检测出脂肪氧化产物和含硫化合物，正己醛、３—辛酮、３，５—丰二烯—２—酮，２—壬酮辛烯—３—醇，二甲基三硫化物、１Ｈ—吲哚等都是黄条腐败时产生的重要挥发性化合物。应指出的是，２—甲基丁醇、庚醇、苯酚、辛烯—３—醇己醛是黄条中所特有的化合物，其余化合物与其它鱼类的挥发性化合物几乎相近。  相似文献   

地下水封石油洞库渗流场的数值分析   总被引：2，自引：0，他引：2  

刘贯群  韩曼  宋涛  陈浩 《中国海洋大学学报(自然科学版)》2007,37(5):819-824

对研究区水文地质条件和地下水封石油洞库、水幕系统进行了概化,利用Visual MODFLOW软件,建立了某地下水封石油洞库无水幕和有水幕条件下的三维地下水数值模拟模型,模拟了地下水封石油洞库区的渗流场。利用所建模型预报了2种条件下涌入地下水封石油洞库的涌水量、区域地下水降落漏斗扩展情况及洞库上方地下水位变化情况等。由预测结果可知,2种条件下洞库涌水量均逐渐减小并趋于稳定,而有水幕条件下的地下漏斗扩展范围和速度均比无水幕条件小;在洞库开挖初期水幕作用较小,随时间延长作用愈加明显,因此水幕系统在保证地下水封石油洞库的储油安全和保护周围地下水资源方面都起到重要作用。  相似文献   

太平洋海域海气热通量地理分布和时间变化的研究   总被引：6，自引：1，他引：6  

钱粉兰  周明煜 《海洋学报》2001,23(1):21-28

应用美国宇航局Goddard地球观测系统四维资料同化系统计算和分析了太平洋海域感热通量和潜热通量随时间的变化规律和地理分布特征.研究结果表明,太平洋西北部海域热通量有明显的季节性变化,其余海域这种现象不明显.在太平洋海域总是存在潜热通量最高值区域,而感热通量除冬季20°N以北海域数值稍高外,其余海域数值都很小,没有出现最高值区域.纬度不同热通量随经度的变化规律不同,经度不同,热通量随纬度的分布规律也不同,同时各断面热通量随纬度的分布趋势随季节而改变.  相似文献   

Risk-based decision-making for drilling waste discharges using a fuzzy synthetic evaluation technique   总被引：5，自引：0，他引：5  

Rehan Sadiq  Tahir Husain  Neil Bose 《Ocean Engineering》2004,31(16):1929-1953

Offshore petroleum drilling wastes contain toxic substances that are potentially harmful to the marine ecosystem. Despite environmentally benign characteristics, wastes associated with synthetic-based fluids still contain a certain amount of pollutants due to contamination with formation oil and the presence of trace heavy metals in barite, which may pose risk when discharged into the marine environment. A framework is presented here for a decision support system for the selection of the best drilling waste discharge option. Uncertainties in the quantification of risk, cost and technical feasibility are expressed by fuzzy numbers. An analytical hierarchy process with a technique called fuzzy synthetic evaluation is employed to determine the best management alternative (discharge scenario).  相似文献   

关于海水网箱养殖系统风险评估的基础研究   总被引：1，自引：0，他引：1  

刘圣聪  梁振林 《海洋湖沼通报》2007,(3):132-142

随着海水网箱养殖业的迅速发展,制约海水网箱养殖发展的种种因素也逐步显露出来(风暴潮等恶劣气候、环境污染、人为的破坏等等),海水网箱养殖在预期获得丰厚利润的同时也面临遭受巨大损失的风险。本文对海水网箱养殖系统风险评估的可操作性进行了基础研究,提出了一套适合海水网箱养殖系统的风险评估方法,并就数据的收集和专家评审表做了一些研究,以此客观的反映系统的安全性和可靠性,使决策者实现对养殖系统生命周期的最佳控制。  相似文献   

Design of Mooring System for Oil Storage Vessels     

LI  Wen-long 《中国海洋工程》2003,17(4):541-550

The floating oil storage system has been proposed as a new facility for Strategic Petroleum Reserve (SPR) in China. Mooring is one of the key technologies to ensure the safety, reliability, and performance of the oil storage system. This paper describes the concept, analysis, design and reliability of the mooring system. For mooring system design of these oil vessels, analysis is essential of the behavior of the vessel in connection with mooring facilities of nonlinear resilience. A nonlinear mathematical model for analyzing a moored vessel is established and solved. Some results of numerical simulations are presented. Assessment of the safety regarding the mooring system in terms of failure probability is carried out. Another simulation model for calculating the failure probability of the mooring system is proposed. The design parameters that have an influence on the characteristics of the failure probability have been identified. The simulation results show that the mooring system has an annual reliab  相似文献