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1.
ＥＶＯＬＵＴＩＯＮＯＦＲＡＰＩＤＳＯＦＣＲＥＥＫＭＯＵＴＨ－ＢＡＲＡＴＧＥＺＨＯＵＢＡＲＥＳＥＲＶＯＩＲＡＮＤＴＨＥＩＭＰＡＣＴＳＯＮＮＡＶＩＧＡＢＬＥＣＨＡＮＮＥＬＩＮＴＨＥＵＰＰＥＲＲＥＡＣＨＥＳＯＦＴＨＥＣＨＡＮＧＪＩＡＮＧＲＩＶＥＲ￥ＬｉｎＣ...  相似文献   

2.
（翁齐浩）ＴＨＥＲＥＬＡＴＩＯＮＳＨＩＰＢＥＴＷＥＥＮＴＨＥＥＮＶＩＲＯＮＭＥＮＴＡＬＣＨＡＮＧＥＯＦＴＨＥＺＨＵＪＩＡＮＧＲＩＶＥＲＤＥＬＴＡＩＮＨＯＬＯＣＥＮＥＡＮＤＩＴＳＣＵＬＴＵＲＡＬＯＲＩＧＩＮＳＡＮＤＰＲＯＰＡＧＡＴＩＯＮ￥ＷｅｎｇＱｉｈ...  相似文献   

3.
ＴＨＥＣＨＡＲＡＣＴＥＲＡＮＤＣＨＡＮＧＥＴＥＮＤＥＮＣＹＯＦＡＧＲＩＣＵＬＴＵＲＡＬＬＡＮＤＵＳＥＩＮＴＨＥＺＨＵＪＩＡＮＧＤＥＬＴＡ－ＡＣＡＳＥＳＴＵＤＹＯＦＳＨＵＮＤＥＣＩＴＹＺｈａｎｇＬｕｏｃｈｅｎｇ（张落成）（ＮａｎｊｉｎｇＩｎｓｔｉｔｕｔ...  相似文献   

4.
THE CORRESPONDING ANALYSIS OF HEAVY-METAL POLLUTION OF SOIL IN ZHUZHOU CITY   总被引：1，自引：0，他引：1  
ＴＨＥ ＣＯＲＲＥＳＰＯＮＤＩＮＧ ＡＮＡＬＹＳＩＳ ＯＦ ＨＥＡＶＹ－ＭＥＴＡＬ ＰＯＬＬＵＴＩＯＮ ＯＦ ＳＯＩＬ ＩＮ ＺＨＵＺＨＯＵ ＣＩＴＹ ＳｈａｎｇＪｉｎｃｈｅｎｇ（尚金城）；ＬｏｎｇＡｉｍｉｎ（龙爱民）ＬｉＢｉｎ（李斌）；ＪｉａｎｇＪ...  相似文献   

5.
ＲＥＣＯＮＳＴＲＵＣＴＩＯＮＯＦＰＡＬＥＯＶＥＧＥＴＡＴＩＯＮＡＮＤＰＡＬＥＯＣＬＩＭＡＴＥＯＦＨＯＬＯＣＥＮＥＨＹＰＳＩＴＨＥＲＭＡＬＩＮＴＨＥＨＥＭＵＤＵＲＥＧＩＯＮＺｈｏｕＺｉｋａｎｇ（周子康）；ＸｉａＹｕｅｊｉｏｎｇ（夏越炯）；ＬｉｕＷｅｉｌ...  相似文献   

6.
陈宝冲ＴＨＥＣＨＡＮＧＥＯＦＴＨＥＧＥＮＥＲＡＬＦＯＲＭＡＮＤＴＨＥＴＲＡＮＳＰＯＲＴＯＦＴＨＥＷＡＴＥＲ，ＬＯＡＤＡＮＤＳＡＬＴＡＢＯＵＴＴＨＥＮＯＲＴＨ－ＢＲＡＮＣＨＯＦＴＨＥＣＨＡＮＧＪＩＡＮＧＲＩＶＥＲＭＯＵＴＨ￥ＣｈｅｎＢａｏｃｈｏｎｇ（Ｎ...  相似文献   

7.
ＴＨＥＳＡＴＥＬＬＩＴＥＴＯＷＮＳＯＦＭＥＴＲＯＰＯＬＩＳＧＵＡＮＧＺＨＯＵ：ＥＶＯＬＵＴＩＯＮ，ＩＮＨＥＲＥＮＴＬＩＮＫＳＷＩＴＨＴＨＥＣＥＮＴＲＡＬＣＩＴＹＡＮＤＴＥＮＤＥＮＣＩＥＳ──ＡＣＡＳＥＳＴＵＤＹＯＦＲＥＮＨＥＴＯＷＮＹａｎＸｉａｏｐｅ...  相似文献   

8.
ＡＳＴＵＤＹＯＮＴＨＥＦＯＲＥＣＡＳＴＡＮＤＲＥＧＵＬＡＴＩＯＮＯＦＣＯＯＲＤＩＮＡＴＥＤＤＥＶＥＬＯＰＭＥＮＴＯＦＵＲＢＡＮＥＮＶＩＲＯＮＭＥＮＴＡＮＤＥＣＯＮＯＭＹＩＮＧＵＡＮＧＺＨＯＵＹａｎｇＳｈｉｈｏｎｇ（杨士弘）（ＤｅｐａｒｔｍｅｎｔｏｆＧ...  相似文献   

9.
ＬＩＮＥＡＲＳＴＵＤＹＯＮＬＡＮＤＳＣＡＰＥＨＥＴＥＲＯＧＥＮＥＩＴＹＯＦＤＯＮＧＬＩＮＧＤＩＳＴＲＩＣＴＯＦＳＨＥＮＹＡＮＧ赵羿ＬＩＮＥＡＲＳＴＵＤＹＯＮＬＡＮＤＳＣＡＰＥＨＥＴＥＲＯＧＥＮＥＩＴＹＯＦＤＯＮＧＬＩＮＧＤＩＳＴＲＩＣＴＯＦＳＨＥＮＹ...  相似文献   

10.
ＰＲＯＢＬＥＭＳＯＦＴＨＥＡＱＵＡＴＩＣＥＮＶＩＲＯＮＭＥＮＴＡＮＤＣＯＵＮＴＥＲＭＥＡＳＵＲＥＳＩＮＲＡＰＩＤＥＣＯＮＯＭＩＣＤＥＶＥＬＯＰＭＥＮＴＩＮＴＨＥＺＨＵＪＩＡＮＧＲＩＶＥＲＤＥＬＴＡ￥ＷｅｎＹａｎｍａｏ（温琰茂）；ＣｈｅｎｇＧｕｏｐｅｉ...  相似文献   

11.
The objective of this study was to provide reliable basis for decision making for national food security and layout and structure adjustment of grain production in the northeastern China. The data of mean daily air temperature of 1961-2009 from 106 meteorological stations in the northeastern China were chosen in this study. Using statistical methods and isoline method, the spatio-temporal changes of various decadal ≥ 10℃ accumulated temperature and the climatic means of ≥ 10℃ accumulated temperature were studied in this paper. The results showed that 1) The geo-graphical distribution of ≥ 10℃ accumulated temperature in the northeastern China could be influenced directly by the latitude, longitude and altitude. If latitude moved one degree northward, the average decrease amplitude of the climatic means was 101.9℃ in the study area. 2) The means of decadal ≥ 10℃ accumulated temperature rose since the 1980s, and their increase amplitudes became larger in the 1990s and the 2010s obviously. Compared with those of the 1980s, ≥ 10℃ accumulated temperature increased by about 100℃ in the mountainous and plain areas in the 1990s; compared with those of the 1990s, ≥ 10℃ accumulated temperature increased by about 200℃ in the Hulun Buir High Plain and the Songnen Plain, and 100℃ in the Sanjiang Plain and the Liaohe Plain in the 2010s. 3) The means of the decadal ≥ 10℃ accumulated temperature for 106 meteorological stations in the northeastern China increased with the rate of 145.57℃/10yr in 1961-2009. 4) The climatic means of ≥ 10℃ accumulated temperature increased from 1961-1990 to 1971-2000 and 1981-2009. Compared with the climatic mean of 1971-2000, that of 1981-2009 had increased by above 50℃ in most of the study area, even up to 156℃. Compared with the climatic mean of 1961-1990, that of 1981-2009 increased by above 100℃ in most parts of the study area, even up to 200℃. 5) The maximum northward shift, eastward and westward extension amplitudes of 3100℃, 3300℃ and 3500℃ isolines were larger among all isoli-nes for the climatic means of the three phases. Compared with the positions of the isolines of 1961-1990, those ampli-tudes of 3100℃ isoline of 1981-2009 were 145 km, 109 km and 64 km, respectively; those of 3300℃ isoline were 154 km, 54 km and 64 km, respectively; and the maximum northward shift of 3500℃ isoline was about 100 km.  相似文献   

12.
The regional observed temperature and precipitation changes and their abrupt jumps disturbed by large-scale reclamation in the Sanjiang Plain, Northeast China were studied. Mean annual temperature of the region was tending to go up and has increased by 1.2-2.2℃ over the past 50 years. A warming jump of mean annual temperature of the region occurred in the 1980s, which had an increase amplitude of 0.9℃. Linear tendency rates of annual precipitation were negative in most of the region. The maximum of annual precipitation decrease was 155.8mm over the past 50 years. An abrupt decrease of regional annual precipitation happened in the middle of the 1960s,which had a decrease of 102.1 mm. Based on the fact of climatic change of the Sanjiang plain over the past 50 years,it is held that the region had larger warming amplitude than that change of the Sanjiang Plain over the past 50 years,it is held that the region had larger warning amplitude than that of the surrounding areas in the recent years, which resulted from the large-scale reclamation of various kinds of wetlands.  相似文献   

13.
Sand wedge is formed under the conditions of coldclimate, and is an important basis for reconstructingpaleoenvironment (LI et al., 1990; WANG, 1991 ). Ithas been reported constantly over the last 20 years inthe Qinghai-Xizang (Tibet) Plateau (GUO, 1979; CUl,1983; XU et al., 1984; LIANG et al.,, 1984; PAN etal., 199 ) and North China (YANG et al., 1983; DONGet al., 1985) and Northeast China (GUO et al.,1981 ). We also found fossil sand wedge groups formedin the end of the Late P…  相似文献   

14.
Based on the new data of the Quaternary along the coast of Hainan Island, China, this paper puts forward that the Holocene in Hainan Island can be divided into four formations: Wanning formation (Q41), Sanya formation (Q42-1), Qiongshan formation (Q42-2) and Ledong formation (Q43). Spore-pollen analysis shows that there are 6 spore-pollen zones existed, reflecting two cycles of climatic fluctuation from warm-dry to hot-humid. The climax of hot-humid period occurred 6,000-5,000 years B.P.. Based on the 14C dating data of the 38 samples representing the positions of ancient sea level, a breakthrough curve representing the sea level change during the Holocone is obtained, in which , a sea level change caused by tectonic movement is subtracted. Two cycles of rise-drop of sea level with three periods of high sea level were found. The period with the highest sea level is some 6,000-5,000 years B.P.. According to the rise-drop rate of sea level, four periods of the sea level change can be distinguished in the  相似文献   

15.
Seeking for an effective method to probe further the relation among Tibetan Plateau, climatic events, and natural environmental changes in the Zoige Basin, we proposed a physical model for the reconstruction of climate and environment and a preliminary application was conducted on the 45 m (about 200 ka BP), upper part of Core RM (310 m long) drilled in the Zoige Basin (33°57’N, 102°21’E), on the eastern Tibetan Plateau. The results showed that: a) in the Zoige region, the maximum temperature in the period equivalent to Stage 7 in the deep-sea stable oxygen record was 2.7°C higher than that at present; b) Stage 6 temperature was 4.3°C lower than that at present; c) Stage 5 peak temperature was 5.2°C higher that that at present; d) Stage 4 average temperature should have been 2–3°C lower than that at present; and e) Stage 3 temperature differences within the period were more than 4°C. It was found that during Stage 6 (140–160 ka BP) the environment in the Zoige Basin was extraordinary, representing a transition period from warm-dry and cold-wet to warm-wet and cold-dry environmental conditions due to the uplift that occurred on the Tibetan Plateau at this period. Project 49803001 supported by NSFC and also funded by National and CAS Tibet Research Project (G1998040800).  相似文献   

16.
Wetland stores substantial amount of carbon and may contribute greatly to global climate change debate. However, few researches have focused on the effects of global climate change on carbon mineralization in Zoigê al-pine wetland, Qinghai-Tibet Plateau, which is one of the most important peatlands in China. Through incubation ex-periment, this paper studied the effects of temperature, soil moisture, soil type (marsh soil and peat soil) and their in-teractions on CO2 and CH4 emission rates in Zoigê alpine wetland. Results show that when the temperature rises from 5℃ to 35℃, CO2 emission rates increase by 3.3-3.7 times and 2.4-2.6 times under non-inundation treatment, and by 2.2-2.3 times and 4.1-4.3 times under inundation treatment in marsh soil and peat soil, respectively. Compared with non-inundation treatment, CO2 emission rates decrease by 6%-44%, 20%-60% in marsh soil and peat soil, respec-tively, under inundation treatment. CO2 emission rate is significantly affected by the combined effects of the tempera-ture and soil type (p < 0.001), and soil moisture and soil type (p < 0.001), and CH4 emission rate was significantly af-fected by the interaction of the temperature and soil moisture (p < 0.001). Q10 values for CO2 emission rate are higher at the range of 5℃-25℃ than 25℃-35℃, indicating that carbon mineralization is more sensitive at low temperature in Zoigê alpine wetland.  相似文献   

17.
ＴＨＥ ＰＲＥＬＩＭＩＮＡＲＹ ＳＴＵＤＹ ＯＮ ＰＯＳＳＩＢＬＥ ＳＣＥＮＡＲＩＯＳ ＯＦ ＦＬＯＯＤ ＡＮＤ ＤＲＯＵＧＨＴ ＩＮ ＣＨＩＮＡ ＩＮ ＴＨＥ ＣＡＳＥ ＯＦ ＧＬＯＢＡＬ ＷＡＲＭＩＮＧ ＣｈｅｎＪｉａｑｉ（陈家其）（Ｎａｎｊｉｎ...  相似文献   

18.
The total organic carbon (TOC) content series from the lake sediment of Minqin Basin (100°57′–104°57′E, 37°48′–39°17′N) in northwestern China, which has a 10 000-year-long paleo-climatic proxy record, was used to analyze the Holocene climate changes in the local region. The proxy record was established in the Sanjiaocheng (SJC), Triangle Town in Chinese, Section (103°20′25″E, 39°00′38″N), which is located at the northwestern boundary of the present Asian summer monsoon in China, and is sensitive to global environmental and climate changes. Applying singular spectrum analysis (SSA) to the TOC series, principal climatic oscillations and periodical changes were studied. The results reveal 3 major patterns of climate change regulated by reconstructed components (RCs). The first pattern is natural long-term trend of climatic change in the local area (Minqin Basin), indicating a relatively wetter stage in early Holocene (starting at 9.5 kaBP), and a relatively dryer stage with a strong lake desiccation and a declined vegetation cover in mid-Holocene (during 7–6 kaBP). From 4.0 kaBP to the present, there has been a gradually decreasing trend in the third reconstructed component (RC3) showing that the local climate changed again into a dryer stage. The second pattern shows millennial-centennial scale oscillations containing cycles of 1 600 and 800 years that have been present throughout almost the entire Holocene period of the last 10 000 years. The third pattern is a millennial-centennial scale variation with a relatively smaller amplitude and unclear cycles showing a nonlinear interaction within the earth’s climate systems.  相似文献   

19.
Analysis of 13 spore-pollen assemblage zones reflecting environmental changes since the later middle Pleistocene showed the seccession of paleovegetation and the paleogeographic changes in the Bohai Basin and circumjacent area. Paleoclimatic variations here can obviously be divided into 5 cold and 5 warm periods: 2 cold and 1 warm periods in 200,000–100,000 a B.P.(late middle Pleistocene) 3 cold and 3 warm periods in 100,000–12,000 a B.P.(late Pleistocene), and 1 warm period since 12,000 a B.P. Late Pleistocene climate tended to become colder and colder. The coldest period was in the later stage of late Pleistocene, when the study area was a periglacial zone. The mean annual temperature then was about 10°C lower than it is now. In the middle stage of late Pleistocene, climate became warm; the mean annual temperature then was about 3–4°C higher than it is now. By applying principles of climatic stratigraphy, the authors deduced through sporo-pollen analysis, that the boundary between middle and late Pleistocene should be at 178–181 m, and that between Pleistocene and Holocene should be at 12.8 m. The results of climatic stratigraphy are consistent with those of magnetic stratigraphy. This paper was published in Chinese inOceanologica et Limnologia Sinica.18 (3): 253–266, 1987.  相似文献   

20.
Effects of temperature on oxygen consumption rate (OCR) and ammonia—N excretion rate of scallopChlamys farreri (1.7–6.2 cm in shell height) were studied in laboratory from Dec. 30,1996 to Jan. 28,1997. Under the controlled conditions of ambient water temperature 10–31°C and salinity 32, the concentrations of dissolved oxygen and ammonia—N were determined by the Winkle method and the hypobromite method, respectively. Results showed that the OCR ranged from 1.20 mg/g (DW) · h to 5.76 mg/g (DW) · h. The OCR increased with temperature from 10°C to 23°C, but at 28°C the OCR of mature individuals decreased, and that of different size scallops reduced at 31°C. The ammonia—N excretion rate ranged from 113.03 μg NH4-N/g (DW) · h to 486.63 μg NH4-N/g (DW) · h, and increased with temperature from 10°C to 31°C. Contribution No.3180 from the Institute of Oceanology, Chinese Academy of Sciences. This work was supported by the National Commission of Science and Technology of China, Grant No.96-922-02-04.  相似文献   

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