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30 June 2004, Volume 16 Issue 2 Previous Issue    Next Issue
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CHEMICAL COMPOSITIONS AND CLASSIFICATION OF GROVE MOUNTAINS (GRV) 98003 AND OTHER THREE IRON METEORITES 2004, 16 (2):  81-90.  Abstract ( 1372 )   PDF (160KB) ( 1601 )   Concentrations of Cr, Co, Ni, Cu, Ga, Ge, As, Sb, W, Re, Ir, Pt and Au of GRV 98003, from Antactica, and Ujimqin iron meteorites have been measured by instrumental neutron activation analysis. According to bulk chemistry, the ungrouped GRV 98003 is classified into IAB group, and the ungrouped Ujimqin as a unique iron of IAB iron meteorite complex. The elemental abundance pattern and correlation of elements (e.g. Ni Au, Co Au, As Au, W Au, Cu Au, Sb Au) of GRV 98003 are similar with those of NAW 468 (IAB), but significantly depleted in refractory siderophile elements (Re, It) and moderate volatile elements (Ga, Ge) relative to the latter. Furthermore, the Nantan (IIICD) and Yongning (IA) meteorites are re classified as a member of IAB main group (MG) and a unique iron meteorite related to IAB iron meteorite complex, respectively. Related Articles | Metrics

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PRIMARY STUDY ON USING SKUA ASDESIGNATIVE SPECIES IN ANTARCTIC ENVIRONMENTAL MONITORING 2004, 16 (2):  91-97.  Abstract ( 1354 )   PDF (231KB) ( 1475 )   The relativity of the diet of skuas (south polar skua,brown skua,and their hybrid) with environmental quality around Antarctic stations was investigated during the years of 2001—2003 in Fildes Peninsula, King George Island, Antarctica. The results show that skuas food structure was strongly effected by station waste. Food components could be an important information carrier both of animals ecological habit and environmental quality. Therefore, there is possibility that of using skua as an designative species for environmental estimation around Antarctic stations. Related Articles | Metrics

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APPLICATION OF SYNCHROTRON RADIATION X-RAY FLUORESCENCE IN THE STUDY OF POLAR ENVIRONMENT 2004, 16 (2):  99-105.  Abstract ( 1334 )   PDF (291KB) ( 1858 )   Here we briefly introduce the principle and characteristics of synchrotron radiation X ray fluorescence (SR XRF) method. After that, we summary the application of SR XRF microscopic analysis method in polar environment study recently and expect this approach to be intensively used in the future. Related Articles | Metrics

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CHANGE DETECTION ON ANTARCTIC GLACIER FROM THE FLUCTUATION OF SAAS AND NSCAT BACKSCATTERING 2004, 16 (2):  106-113.  Abstract ( 1825 )   PDF (244KB) ( 3780 )   The backscattering characteristic of firn layer in Antarctica has tight relevance to liquid water content. The increasing of liquid water content caused by melting will reduce the backscattering greatly. Using the Ku band scatterometer data from SAAS(1978) and NSCAT(1996) for differential analysis, the regions showing remarkable fluctuations are given. Focusing on Ellsworth Land, the historic weather record is combined for analysis. It is concluded that the reduction of backscattering is partly out of the increasing temperature or melting. Related Articles | Metrics

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PROGRESS AND PROSPECT IN MASS BALANCE STUDIES OF ANTARCTIC ICE SHEET 2004, 16 (2):  114-126.  Abstract ( 1685 )   PDF (234KB) ( 2506 )   Recent advances in the study on the mass balance of Antarctic Ice Sheet show that the West Antarctic Ice Sheet exhibits a bimodal behavior, with thickening in the west and more rapid thinning to the north, but is probably losing mass overall at a rate sufficient to raise sea level by almost 0.2 mm·a -1 . The East Antarctic Ice Sheet seems to be close to balance, but it is still impossible to determine even the sign of its mass balance. The state of Antarctic Ice Sheet mass balance is still unknown at present. Meanwhile, stoppage of huge glaciers, acceleration of others, rapid thinning of large sectors of ice sheet, rapid breakup of vast areas of ice shelf and acceleration of tributary glaciers, and vigorous bottom melting near grounding lines show substantial changes on relatively short time scales are commonplace on Antarctic Ice Sheet. The following key future research fields are needed to understand and predict Antarctic Ice Sheet mass balance: Observation and modeling of the surface elevation changes, determination of surface mass balance and its distribution over drainage basins as well as fluxes at the grounding lines and the bottom melting underneath ice shelves, understanding of the deglaciation history, development, comparison and improvement of all kinds of models related to modeling and prediction of ice sheet mass balance. Related Articles | Metrics

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THE SUBALTERN OF CHLOROPHYLL A MAXIMA IN THE GREAT WALL BAY AND ADJACENT SEA, ANTARCTICA 2004, 16 (2):  127-134.  Abstract ( 1596 )   PDF (125KB) ( 1507 )   This paper reported the distribution of chlorophyll a and nutrient concentrations in the Great Wall Bay and adjacent sea, Antarctica, during the 16th Chinese Antarctic Expedition (Dec. 1999 March 2000), and analyzed the cause of the subaltern of chlorophyll a maxima(SCM). The results showed that the nutrient concentrations were high during the investigation period, and the average values of nitrate, nitrite, phosphate and ammonium were 2.177, 0.353 , 1.899 and 1.990μmol/L, respectively. It revealed the enrichment of the nutrient in this water area. The SCM was significant. The depths of the SCM were between 5 and 10m depth and increased with the water depths. The study also showed that the positive relationship between chlorophyll a and nitrite concentrations. Related Articles | Metrics

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THE UPCOMING IPY: AN OPPORTUNITY FOR EXTENDING INTERNATIONAL COORDINATED RESEARCH ON THE UNSOLVED PROBLEMS OF POLAR REGIONS 2004, 16 (2):  145-150.  Abstract ( 1283 )   PDF (296KB) ( 1598 )   The upcoming IPY initiated by ISCU and WMO in 2007 will bring a series of ambitious scientific activities of polar regions. This paper discusses the background of the IPY scientific plan and introduces its five topics grouped by ICSU PG. From analyzing the topics, it is obvious that the rapid change of environment in polar regions will be focused on by scientists in the world. IPY 2007/2008 will address an international and multi disciplinary scientific program with intensive observations and new sensing technologies. It will offer Chinese scientists a good opportunity to extend international collaboration research and expedition with other nations. Related Articles | Metrics

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OUTLOOK OF DATA MANAGEMENT AND SHARING IN CHINESE POLAR RESEARCH EXPEDITITION 2004, 16 (2):  151-158.  Abstract ( 1352 )   PDF (340KB) ( 1256 )   The essay is the brief introduction of data management and sharing progress in the 18th, 19th CHINARE and 2nd Chinese Arctic Research Expedition. By making CN Polar DB as its data release platform and using ASP.NET tech, non profit data share service will be provided to users through www.chinare.org.cn and www.wdcego.net. From 2003 to 2004, 406 new datasets have been issued and more than 1000000 records have been added. Related Articles | Metrics