Archive

30 March 2001, Volume 13 Issue 1 Previous Issue    Next Issue
---
Contents


For Selected:

Download Citations EndNote Ris BibTeX

Toggle Thumbnails

Contents

Select

PRIMARY PRODUCTIVITY AND STANDING STOCK OF PHYTOPLANKTON IN THE PRYDZ BAY AND THE ADJACENT NORTHERN SEA AREA DURING THE AUSTRAL SUMMER OF 1999/2000 2001, 13 (1):  1-12.  Abstract ( 1345 )   PDF (295KB) ( 1417 )   In the 19th to 27th, January, 2000, the primary productivity, standing stock of phytoplankton, euphotic layer were surveyed in the Plydz Bay and the adjacent northern sea area, (62°N-68°N, 70°30′E-75°30′E), Antarctica. The result showed that the high chlorophyll a concentration was in the coastal bay, the polynya and the slope of the middle surveyed area. The higher area of chlorophyll a concentration (2.16-5.08μg/dm 3) were in the supper layer (0-50m) of the stations Ⅲ 6, Ⅲ 8. The average concentration in the subsurface (1.49±1.61μg/dm 3) is higher than that in the surface water(1.14±1.19μg/dm 3), then the concentration descended with water depth increased, the average chlorophyll a concentration is 0.03±0.02μg/dm 3 in the layer 200m. In the anchor station (Ⅲ 12), the maximum chlorophyll a concentration was in the afternoon of the austral summer, the concentrations in the surface water (0-25m) were higher than that deep layer which concerning continental border ice dissolved and ice algal released in the sea water. The potential primary productivity were 0.76-12.59μgC/(m 3·h), the average value was 4.01±4.07 mgC/(m 3·h) in the surveyed area;The in situ productivity more than 1.5gC/(m 2·d) was in the bay and continental area, and about 0.5gC/(m 2·d) appeared in the slope and deep sea area .The higher productivity was located on the coastal bay and the polynya of the continental shelf. The administration number was 0.88-3.10mgC/(mg Chla·h). The surface chlorophyll a concentration was related to the dissolved oxygen intently ( Y =0.059 X -41.02, r 2=0.931), and discussed the surface chlorophyll a concentration was interrelated ΔpCO 2 in the surface sea water. Related Articles | Metrics

Select

DISTRIBUTION OF CYANOBACTERIUM IN THE BERING SEA 2001, 13 (1):  13-20.  Abstract ( 1259 )   PDF (457KB) ( 1347 )   null Related Articles | Metrics

Select

THE DIGITAL MAPPING OF SATELLITE IMAGES BY FREE OF GROUND CONTROL AND THE ANALYSIS OF LANDFORM, BLUE ICE AND METEORITES DISTRIBUTION IN THE GROVE MOUNTAINS 2001, 13 (1):  21-31.  Abstract ( 1545 )   PDF (710KB) ( 1536 )   The colorful satellite image map at the scale of 1:100,000was made by processing the parameters on satellite on the condition of no data of field surveying.It had ensured the smooth performance of the choice of expedition route,navigation and research task before the Chinese Antarctic Scientific Expedition (CHINAER)first went researching to the Grove Mountains.Moreover,on the basis of the visual interpretation of the satellite image,we preliminarily analyze and discuss the relief and landform,blue ice and meteorite distribution characteristic in the Grove Mountains. Related Articles | Metrics

Select

THE RESULT ANALYSIS FOR THE DEFORMATION MONITORING BY USING GPS TECHNOLOGY IN ANTARCTIC PENINSULA 2001, 13 (1):  32-41.  Abstract ( 1409 )   PDF (239KB) ( 1346 )   SCAR Epoch GPS Campaigns were hosted by Working Group on Geodesy and Geographic Information (WGGGI) of Scientific Committee on Antarctic Research (SCAR). The main objectives of this project were defined as follows: Measurement of the relative rates and the directions of separation of the Antarctic Plate from adjoining plates and microplates; Determination of relative motion of crustal blocks within the Antarctic Plate; Determination of vertical motion of the Antarctic lithosphere due to changing ice and ocean loadings; and Link of Antarctic tide gauges to the ITRF. As a member of the SCAR WGGGI, China had participated in the campaigns including both Great Wall Station and Zhongshan Station. The former had reoccupied five stages and the latter four stages respectively. The 7 stations, located at the Antarctic Peninsula, were selected to be processed. Meanwhile, 2 IGS stations were included. The results denote that the plate is steady in Antarctic Peninsula with a 10mm/a drift velocity to southwest. Related Articles | Metrics

Select

THE SURVEY OF MARINE MICROORGANISMS IN LOW TEMPERATURES OF CHUKCHI AND BERING SEA 2001, 13 (1):  42-49.  Abstract ( 1318 )   PDF (442KB) ( 1374 )   Investigations of total number of marine microbes in low temperatures of Chukchi Sea and Bering sea were conducted during the summer time in north hemisphere. In Chukchi Sea the detection rates of marine bacteria and fungi were 100% and more than 94%, respectively. And the quantity of marine bacteria generally was more than 10 3 cells/cm 3, and that of marine fungi usually 10-10 3 cells/cm 3. In most investigation sites marine bacterial total numbers were higher than marine fungal total numbers. There are abundant marine microorganisms distributing in the areas from surface water to deeper layers of 10m or 30m depth in Chukchi Sea. Results showed that there were large differences of marine microbial total numbers between different sampling sites, and the melt sea ice and salinity in sea water were probably two important factors affecting the marine microbial amounts in Chukchi Sea. As to marine bacteria in Bering sea, their detection rates were 100% and their amounts were generally 10 2-10 3 cells/cm 3. For marine fungi, their detection rates were more than 84% and their amounts generally 10 2-10 3 cells/cm 3. Similar to the situation in Chukchi Sea, there were fairly large differences of marine microbial total numbers between different sampling sites in Bering Sea, too.The investigation results proved that a large number of marine microbes in low temperatures lived in Chukchi and Bering Sea. Among the marine bacteria studied, 81% of bacteria from Chukchi Sea and 88.9% of bacteria from Bering sea can grow well in low temperatures no higher than 10℃. And some of these marine bacteria can utilize starch or cellulose as carbon source for their growth. These microbes can provide abundant materials for further exploiting and developing the marine microbe resources in low temperature. Related Articles | Metrics

Select

X-RAY FLUORESCENT ANALYSIS OF THE 6 SPECIES OF BRYOPHYTE IN THE KING GEORGE ISLAND, ANTARCTICA 2001, 13 (1):  50-56.  Abstract ( 1392 )   PDF (169KB) ( 1616 )   Without a standard specimen, we analysed the heavy element content of 6 moss species in the King George Island of Antarctica by XRF. They are Andreaea regularis, Bryum muehlenbeckii, Drepanocladus uncinatus, Brachythecium subpilosum, Tortula saxiola and Ditrichum austro georgicum . We found that various plants absorbed varied heavy elements. Even if the same moss, there are the different elements in leaves and stems. Andreaea regularis is possessed of the fewest heavy element varieties in 6 species of bryophyte, but it absorbs Fe more powerfully. Owing to superior environment, we didn't find a lot of poisonous heavy metal elements in bryophyte of Antarctica. Related Articles | Metrics

Select

A PRELIMINARY ANALYSIS OF THE HYDROGRAPHIC FEATURES AND WATER MASSES IN THE BERING SEA AND THE CHUKCHI SEA 2001, 13 (1):  57-68.  Abstract ( 1590 )   PDF (548KB) ( 2173 )   The hydrographic feature and water masses in the Bering Sea and the Chukchi Sea are analyzed on the basis of the observations of the first Chinese National Arctic Research Expedition. The results show that:(1)The distribution of temperature and salinity present obvious regional difference in both the Bering Sea and the Chukchi Sea. (2)The Intermediate Cold Water, which is the main feature of the temperature vertical structure, occurred in the depth between 20 and 250m in the most areas of the Bering Sea in summer.(3)Both the temperature and the salinity decrease obviously in the sea areas north of 70°N, where a thermobaline front is formed.(4)There are three and two kinds of different water masses in the Bering Sea and the Chukchi Sea respectively. Related Articles | Metrics