基于体验性的“海洋灾害”旅游开发初探

在丰富的可供开发的海洋旅游资源中,由于一些"海洋灾害"能够满足旅游者求异、探险等多方面的旅游需求,能够给旅游者带来"壮美"旅游体验,使其实现自我超越,因而促成了新的海洋旅游产品——"海洋灾害"旅游。其实质是通过恰当的旅游形式对可用作旅游资源的海洋灾害进行的旅游活动,这些旅游资源不仅包括海洋灾害本身(如台风、海啸等)、以海洋灾害为旅游内容建设的主题公园等,还包括因海洋灾害给人类带来的灾难或引致事故产生的遗址、纪念地等。该文基于旅游体验理论确定了"海洋灾害"旅游开发的可行性,并针对海洋灾害的特点分析现阶段与之相适应的旅游体验开发方式,即旅游景观吸引系统的博物馆化和主题公园建设,并提出旅游消费者心理需求、安全保障系统、科学技术手段、宣传促销等是对海洋灾害进行旅游开发的关键要素。     

Oceanic induction and shifting the spectrum

Summary. The recently produced method of analytic continuation in geomagnetic induction is shown for linear problems to be equivalent to the method of shifting the spectrum developed in this context nearly four years earlier. The changes are ones of nomenclature. The periods of decay are shown to be real and negative; this is necessary under-pinning for both methods.     

Oceanic basalt continuous thermal demagnetization curves

The palaeomagnetic standard technique of stepwise thermal demagnetization (STD), long regarded as unreliable for oceanic basalts that have undergone low temperature alteration, has recently been applied in a number of studies to characterize the natural remanent magnetization (NRM) of such rocks. In order to better understand STD data of oceanic basalts, and to possibly identify the magnetominerals that are carrying the NRM, we have carried out a number of continuous and STD experiments on seven oceanic basalt samples. During continuous thermal demagnetization (CTD), a sample is heated to a certain temperature and its NRM is measured during heating and subsequent cooling. Even when CTD reveals only titanomaghemite unblocking at 400°C as the remanence carrier, STD behaviour can be very complex and unblocking is observed at temperatures of up to 500°C and higher. CTD also allowed to identify a partial or full self-reversal of NRM due to interaction between two types of magnetominerals in one sample. The higher degree of maghemitization of smaller titanomaghemite grains with respect to larger ones, which are less efficient in carrying the remanence, was seen for three samples by a shift of 80°C between the strong field thermomagnetic curve and the NRM measured at elevated temperature. In several cases, the identification of the NRM-carrying magnetomineral was not possible from CTD data due to the ambiguity of Curie temperatures in the titanomagnetite/titanomaghemite system.     

我国海洋农牧化发展研究

该文对我国海洋渔业资源与开发现状进行评价,并在我国社会经济发展及技术条件允许的基础上,提出将传统的猎捕型渔业生产方式转变为管理型,以及进行海洋农牧化建设