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30 March 1998, Volume 10 Issue 1 Previous Issue    Next Issue
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ISOTOPIC AGE OF THE VOLCANIC ROCK IN BYERS PENINSULA, LIVINGSTON ISLAND,WEST ANTARCTICA 1998, 10 (1):  4-13.  Abstract ( 1472 )   PDF (509KB) ( 1241 )   K Ar dilution and 40 Ar/ 39 Ar step heating methods have been chosen in dating the isotopic ages of the volcanic and intrusive rocks of Byers Peninsula, Livingston Island. According to the geochronological data obtained, there are three epoches of volcanic activities in studied area by the end of Late Jurassic to Late Cretaceous.The Late Jurassic-Early Cretaceous activity produced basaltic and basaltic andesitic lavas(146Ma,137Ma), followed by gabbro intrusion(135Ma) and aplite dyke (129Ma).The andesite lava (114Ma) and quartz porphyry (94Ma) are of Early Cretaceous age.The basaltic lava with thin intercalated sedimentary beds at lower part represents the Late Cretaceous-Early Tertiary igneous activity regionally. Related Articles | Metrics

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FEATURES OF TEMPERATURE CHANGE OVER THE LAST 400 YEARS AT BARROW,ARCTIC 1998, 10 (1):  14-19.  Abstract ( 1269 )   PDF (332KB) ( 1358 )   A temperature record from a lake core reveals that it is warming at average rate of 0 4℃ per century generally over the past 400 years at Barrow, but it is colding over the past 200 years. Maximum entropy spectra analysis shows temperature fluctuation cycles of 33, 40, 29, and about 90 years at Barrow. According to statistics and entropy analysis of monthly mean temperature from Barrow Meteorological Observatory in 1921-1994, there are cycles of 4 months, 6 months, 14 months, 16 months, 3 year, 4 years, 7 years and 10 years in the recent temperature change. Related Articles | Metrics

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ECOLOGY FEATURES OF COASTAL SALINE LAKES RELATED TO ENVIRONMENTAL EVOLUTION IN THE AREA OF ANTARCTIC CONTINENTAL ICE EDGE 1998, 10 (1):  20-28.  Abstract ( 1266 )   PDF (425KB) ( 1380 )   Modern geomorphological feature of Antarctic continental margin formed in processes of globle climate changing and ice sheet retreating subsequent flooding of areas by sea water and the isostatic uplift raising since 18 000 aB.P..Ecological investigation has been done in some saline lakes in Vestfold Hills(60°38′S,78°06′E),East Antarctica.The results show that changes of natural environment and physical chemical factors,as well as the structure of biotic species and succession do occur in some lakes,due to seasons,local climate changes,environmental evolution and geographic variances in regions,which is continuing in present time.It should be regarded as importent ecological proof for studying on Antarctic and globle climate changes. Related Articles | Metrics

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THE AMOUNT OF HYDROCARBON BACTERIA IN GREAT WALL BAY AND ITS ADJACENT AREAS 1998, 10 (1):  29-34.  Abstract ( 1469 )   PDF (299KB) ( 1206 )   During the Summer of Antarctic in 1993-1994, The species and amount of hydrocarbon bacteria of the Great Wall Bay and its adjacent sea areas have been studied.The Flavobacterium,Pseudomonas,Kurthia and Actinetobacter are checked.The number of them varied from 3 to 1100 cell/L.The number in the inner bay is highter than that out of it.The dispersing is a very important way of the changing of bacteria. Related Articles | Metrics

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THE EFFECTS OF LOW ENERGY ELECTRON PRECIPITATION ON THE IONOSPHERE OVER ZHONGSHAN STATION,ANTARCTICA 1998, 10 (1):  34-39.  Abstract ( 1485 )   PDF (328KB) ( 1333 )   In this paper,the effects of low energy electron precipitation on the ionosphere over Zhongshan Station have been investigated. The characteristic energy and the energy flux of the electron over the Zhongshan Station have evident high latitude characteristics. The ionization rates due to the precipitation of the electrons with various energies are calculated. It can be seen from the results that the low energy electrons are absorbed mainly in the F region. But the high energy electrons can reach the E region. This will result in the occurrence of the particle E layer. Finally, we use “soft zone” electron spectrum to calculate the ionization rate due to the low energy electron precipitation and use the ionization rate to estimate the increase in electron density. The results show that the low energy electron precipitation not only has the great effects on the F region electron density but is one of the reasons to cause the increase in the height of peak. Related Articles | Metrics

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SHORT TERM CLIMATE OF THE LARSEMANN HILLS 1998, 10 (1):  40-49.  Abstract ( 1374 )   PDF (452KB) ( 1822 )   Short term climate characteristics of the Larsemann Hills are presented with referencing previous works by Chinese scientists using the data at Zhongshan Station since 1989, which attempt to provide a background knowledge for further research on climatic and environmental change of the Hills. Related Articles | Metrics

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HOLOCENE GLACIAL MARINE SEDIMENTATION IN PRYDZ BAY, ANTARCTICA 1998, 10 (1):  50-57.  Abstract ( 1229 )   PDF (412KB) ( 1140 )   Glacial marine sedimentation is the most important process contributing to the sediments of the Prydz Bay, Antarctica, based on the study of sedimentology from core NP93 2.The results of 14 C Data show that lower boundary of core NP93 2 is about (12850±800) aB.P.,and top boundary is about (3100±800) aB.P.. Holocene sedimentation characteristics and paleoclimate variation have been discussed by the results of grain size,minerial composition, micropalaeoniology. The apparent climate change occurred at 75cm, which reflects the last glacial stage and Holocene transition.More than four paleoclimate stages were discovered during Holocene, and were consistent with the world glacial movement curves. Related Articles | Metrics

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PSYCHOLOGICAL SELECTION METHODS FOR OVER WINTERING MEMBER OF THE CHINESE NATIONAL ANTARCTIC RESEARCH EXPEDITION 1998, 10 (1):  58-67.  Abstract ( 1342 )   PDF (391KB) ( 1421 )   This is the first study on the psychological selection of winter over members of the CHINARE. The methods include EPQ, BPQ, 16PF, Self reported Questionnaire,Test of Level of Stress and direct observation of behavior.According to the results of the 54 winter over members of the 13th and 14th CHINARE, the valuation was roughly tested. This research is the base for the future studies in this field. Related Articles | Metrics

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A PRELIMINARY STUDY ON ANTARCTIC DATA DIRECTORY SYSTEM 1998, 10 (1):  68-72.  Abstract ( 1507 )   PDF (273KB) ( 1277 )   The Antarctic Data Directory System (ADDS) is the basis of exchanging and sharing international Antarctic data, which is chosen as the top priority in international Antarctic sphere, and being researched jointly by many countries. After analyzing the current international and domestic situation, this paper raises some ideas and proposals for the development of ADDS. On the basis of analyzing the overall structure and the development principles of ADDS, several ideas for Antarctic Directory Interchange Format(ADIF) are discussed, to make information about Antarctic scientific data readily available. After practicing and studying for a period of time, the ways how the toolkit are improved are put forward. some practical opinions on the classification of Antarctic data directory entries are discussed. Some problems in the course of ADDS development and their solutions are considered. Related Articles | Metrics

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DATA PROCESSING AND ANALYSIS OF CRUSTAL DEFORMATION MONITORING IN WEST ANTARCTIC FILDES PENINSULA REGION 1998, 10 (1):  74-79.  Abstract ( 1325 )   PDF (321KB) ( 1319 )   In order to research contemporary crustal movement of Antarctic,China has not only constructed the deformation monitoring network in West Antarctic Fildes Strait region,but also monitored the network by using DI 20 geodimeter and GPS instruments, and participated the Antarctic GPS Campaign Observation organized by SCAR as well. During mathematics processing of crustal horizontal deformation observations,a method to bring deformation parameters into the error equations of observations is discussed in this paper. Several classical deformation models,such as rigid body displacement and strain,are introduced. By analyzing the reference datum of static and dynamic geodetic network,the method is developed to set up different additional weight matrix for every different kind of parameter. A series of programs are developed to implementing the method mentioned above and the a“nalysis of West Antarctic Fildes deformation monitoring network.This paper also involves GPS data processing and analysis of deformation data using principle of monitoring network strain analysis in the paper. The research results indicate that it seems exacting displacement in Fildes rift region,but the displacement is not large,just a little rift shear movement. Related Articles | Metrics

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THE DIFFERENCES OF THE PARTIAL PRESSURE OF CARBON DIOXIDE BETWEEN SEA AND AIR AND ITS FLUX IN THE WESTERN PACIFIC 1998, 10 (1):  80-85.  Abstract ( 1505 )   PDF (164KB) ( 1074 )   In the present work the CO 2 differences between P CO 2 in the surface water and p CO 2 in the atmosphere were determined on the route frome Qindao to Antarctica during Eighth Chinese Antarctic Research Expedition in 1991 . The result of survey indicate: the sea area in north of 7°N , between the equator and 2°S, between 10°S and 43°S, in south of 58° S, serves as a sink for atmospheric CO 2 ,the mean CO 2 fluxes from atmosphere into sea water was about 6.1mg/(m 2·h); the sea area between 7°N and the equator, between 2°S and 10°S, between 43°S and 58°S acts as CO 2 sources, the mean CO 2 fluxes from sea water into atmosphere was about 4.0mg/(m 2·h). Related Articles | Metrics