Ecological aspects of hydrothermal vent animals in captivity at atmospheric pressure     

Hiroshi Miyake  Mitsugu Kitada  Shinji Tsuchida  Yoko Okuyama  & Ko-ichi Nakamura 《Marine Ecology》2007,28(1):86-92

Hydrothermal vent animals were kept and displayed at atmospheric pressure with an artificial hydrothermal vent system in Enoshima Aquarium, Fujisawa, Kanagawa, Japan. The artificial hydrothermal vent system was composed of a main rearing tank, a heating tank, a hot water outlet with added Na₂S as the source of H₂S, and added CO₂ for chemosynthetic bacteria and pH regulation. When the need arises, a dissolved oxygen control unit and submersible heaters can be attached. We are now rearing hydrothermal vent crabs (Austinograea yunohana), hydrothermal vent galatheid crabs (Shinkaia crosnieri), vestimentiferan tubeworms (Lamellibrachia satsuma), hydrothermal vent shrimp (Opaepele spp.), hydrothermal vent barnacles (Ashinkailepas seepiophilia and Neoverruca sp.), and tonguefish (Symphurus sp.). In the artificial hydrothermal vent tank, shrimp and crabs have been observed to cluster close to the artificial hydrothermal vent. In particular, large (adult) crabs needed a heat source to live in the aquarium over a long term. Additionally, some species (A. yunohana, S. crosnieri, Opaepele sp. and Symphurus sp.) have spawned and hatched in captivity. It is likely higher water temperatures are needed for egg and larval development compared with temperatures for adult requirements.  相似文献   

Volume Transport Variability Southeast of Okinawa Island Estimated from Satellite Altimeter Data   总被引：1，自引：1，他引：1  

Xiao-Hua?ZhuEmail author  Hiroshi?Ichikawa  Kaoru?Ichikawa  Kensuke?Takeuchi 《Journal of Oceanography》2004,60(6):953-962

A nine-year-long record of the northeastward volume transport (NVT) in the region southeast of Okinawa Island from 1992 to 2001 was estimated by an empirical relation between the volume transport obtained from the ocean mooring data and the sea surface height anomaly difference across the observation line during 270 days from November 2000. The NVT had large variations ranging from −10.5 Sv (1 Sv ≡ 10⁶ m³s⁻¹) to 30.0 Sv around its mean of 4.5 Sv with a standard deviation of 5.5 Sv. This large variation was accompanied by mesoscale eddies from the east, having a pronounced period from 106 to 160 days. After removal of the eddy, NVT was found to fluctuate from 2 Sv to 12 Sv with a quasi-biennial period.  相似文献   

海平面长期变化对推算多年一遇极值水位的影响   总被引：7，自引：1，他引：7       下载免费PDF全文

于宜法  俞聿修 《海洋学报》2003,25(3):1-7

利用乳山口24a的年极值高、低水位和年平均海平面,分析讨论了平均海平面长期变化对推算多年一遇极值水位的影响.同时讨论了消除平均海平面中长期变化的途径.比较了消除平均海平面长期变化和保留这种变化情况下推算出的两种多年一遇极值水位,可以发现,对多年一遇高水位来说,保留平均海平面长期变化所得结果高于消除了的,而对多年一遇低水位而言,情况正好相反.  相似文献   

Long-term trends in ten non-target North Sea fish species   总被引：1，自引：1，他引：1  

Heessen  Henk J. L.; Daan  Niels 《ICES Journal of Marine Science》1996,53(6):1063-1078

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Phytoplankton trends in the Baltic Sea   总被引：9，自引：2，他引：9  

Wasmund  N.; Uhlig  S. 《ICES Journal of Marine Science》2003,60(2):177-186

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Changes in Surface Energy Partitioning in China over the Past Three Decades     

Yitian QIAN  Pang-Chi HSU  Chi-Han CHENG 《大气科学进展》2017,34(5):635-649

Surface energy balance and the partitioning of sensible heat flux(SHF) and latent heat flux(LHF) play key roles in land–atmosphere feedback. However,the lack of long-term observations of surface energy fluxes,not to mention spatially extensive ones,limits our understanding of how the surface energy distribution has responded to a warming climate over recent decades(1979–2009) at the national scale in China. Using four state-of-the-art reanalysis products with long-term surface energy outputs,we identified robust changes in surface energy partitioning,defined by the Bowen ratio(BR = SHF/LHF),over different climate regimes in China. Over the past three decades,the net radiation showed an increasing trend over almost the whole of China. The increase in available radiative energy flux,however,was balanced by differential partitioning of surface turbulent fluxes,determined by local hydrological conditions. In semi-arid areas,such as Northeast China,the radiative energy was transferred largely into SHF. A severe deficiency in near-surface and soil moistures led to a significant decreasing trend in LHF. The combined effect of increased SHF and decreased LHF resulted in significant upward trends in the BR and surface warming over Northeast China. In contrast,in the wet monsoon regions,such as southern China,increased downward net radiation favored a rise in LHF rather than in SHF,leading to a significant decreasing trend in the BR. Meanwhile,the increased LHF partly cancelled out the surface warming. The warming trend in southern China was smaller than that in Northeast China. In addition to impacts on heat-related events,the changes in the BR also reflected recent cases of extreme drought in China. Our results indicate that information regarding the BR may be valuable for drought monitoring,especially in regions prone to such conditions.  相似文献   

初夏西太平洋副高南北位置长期变化的成因及预报   总被引：1，自引：0，他引：1  

赵振国  陈国珍 《热带气象学报》1995,11(3):223-230

利用月平均高度场和海温场资料,通过统计相关分析,探讨了初夏西太平洋副热带高压南北位置长期变化的规律及其成因,结果表明,初夏副高南北位置存在着11年左右和3-5年的准周期振荡,这种周期变化分别与太阳活动、海洋下垫面和对流层上部位势高度场类似的周期振荡相吻合。太阳黑子高值年、赤道东太平洋暖水期、热带中东太平洋对流层上部位势高度偏高阶段,初夏西太平洋副高位置偏南,反之偏北。最后建立了6月份副高脊线的预报方法。  相似文献   

浙北地区夏季异常高温的一种长期预报方法     

周洪祥 《海洋学研究》1992,10(3):16-23

本文提出了预报浙北地区夏季出现异常高温的一种长期预报方法,采用逻辑结构形式方法来描述预报对象和预报因子之间的关系,并用数理逻辑中的命题公式来描述本文的预报问题,进行逻辑推理预报。从历史资料的回报结果和1990年的预报结果来看,效果是令人满意的。最后,对提出的方法进行了若干讨论。  相似文献   

Zooplankton volume trends off Peru between 1964 and 2001   总被引：5，自引：0，他引：5  

Ayon  Patricia; Purca  Sara; Guevara-Carrasco  Renato 《ICES Journal of Marine Science》2004,61(4):478-484

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Time-series data for a selection of forty fish species caught during the International Bottom Trawl Survey     

Heessen  Henk J. L. 《ICES Journal of Marine Science》1996,53(6):1079-1084

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