A Comparative Study of the Influences of Ice in the Arctic Ocean and the Marginal Ice Zones on Oceanographic Conditions and Primary Productivities

北冰洋与边缘冰区冰对海洋条件和初级生产力影响的比较研究

基本信息

批准号：
01045001
负责人：
AOTA Masaaki
金额：
$ 3.9万
依托单位：
Hokkaido University
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1991
项目状态：
已结题

项目摘要

Comparative study of influences of ice in arctic ocean and marginal ice zone on oceanographic and primary productivityIn this project period (1989-1991), several research works were carried out in the Sea of Okhotsk, Hudson Bay and arctic ocean. The results may be summarized as follows :[Theme 1. The influences of sea ice on the mechanism of air-sea interaction]The coefficients of momentum and heat fluxes obtained in ice covered sea under various ice conditions.[Theme 2. The structure of sea ice and the environmental control of microalgae] Nutrient concentrations of ice algae in the ice were high, microalgae in the brine cells were generally not nutrient limited. The rate of ice growth is the most important factor controlling the distributions of algal biomass and taxonic composition in the sea ice.[Theme 3. Environmental acoustics in ice covered areas] An understanding of-the ambient noise regime under the ice may relate to the strength of the ice and its eventual break up and movement. Similarly, relationships between environmental variables may have significant effects on marine mammals.[Theme 4. Relation of the strength of solar radiation and algal biomass in the marginal ice zone] The observations of solar radiation and the algal biomass were carried out in the southern part of the Okhotsk Sea in February 1992. The results of this observation are being analyzed.[Theme 5. Relation between the air temperature and accumulated ice concentration along the Okhotsk Sea Coast of Hokkaido] The correlation between the accumulated ice concentration and air temperature along the Okhotsk Sea Coast of Hokkaido were statistically investigated. It was suggested that if the mean air temperature averaged from August to March is 1.5 C higher than that of normal year, sea ice will not be found on that coast.

北冰洋和边缘冰区冰对海洋学和初级生产力影响的比较研究本项目期间（1989-1991）在鄂霍次克海、哈德逊湾和北冰洋开展了多项研究工作。结果可概括如下：[主题1.海冰对海气相互作用机制的影响]不同冰条件下冰覆盖海中获得的动量系数和热通量。[主题2.海冰的结构]海冰与微藻的环境控制] 冰藻中冰的营养浓度较高，微藻在盐水细胞中一般不受营养限制。冰的生长速度是控制海冰中藻类生物量和分类组成分布的最重要因素。[主题 3. 冰覆盖区域的环境声学]了解冰下的环境噪声状况可能与冰的强度及其最终的破裂和移动。同样，环境变量之间的关系也可能对海洋哺乳动物产生显着影响。【主题四：冰缘区太阳辐射强度与藻类生物量的关系】在南部地区进行了太阳辐射与藻类生物量的观测1992年2月鄂霍次克海的观测结果正在分析中。[主题5.北海道鄂霍次克海沿岸气温与积冰浓度的关系]积冰浓度与气温的相关性对北海道鄂霍次克海沿岸进行了统计调查。有人建议，如果8月至3月平均气温比常年高1.5℃，该海岸就不会发现海冰。