- Chinese︱Feedback︱Save this page
Get RSS feed
Check out RSS, or use RSS reader to subscribe this item 
Confirmation
Authentication email has already been sent, please check your email box: and activate it as soon as possible.
You can login to My Profile and manage your email alerts.
If you haven’t received the email, please:
- Login︱Register
|
|
|
 |
|
||
| There are 108 papers published in subject: since this site started. | |||
| Select Subject |
| Select/Unselect all | For Selected Papers |
Saved Papers
Please enter a name for this paper to be shown in your personalized Saved Papers list
|
 |
| 1. Analysis on the current situation of land use and economic development in Yantai city | |||
| LIU Luyu,WANG Qiuxian,WU Xiao | |||
Earth Science 02 September 2019
|
|||
| Show/Hide Abstract | Cite this paper︱Full-text: PDF (617K B) | |||
| Abstract:In this paper, based on the remote sensing image of Landsat7 TM/ETM, the ArcGIS10.3 software is used to interpret the land use in Yantai 2015, and the Land Use Remote sensing classification of China\'s coastal zone is classified as the basis, then the land use status of Yaitai 2015 is obtained. The paper analyzes the matching relationship between land use status and economic development by combining the state of economic development, relevant literature and related Yearbook. The following conclusions are drawn: ①The main land utilization type of Yantai 2015 are arable land, woodland, garden and construction sites, while the unused land area is very small. ②The protection of coastal wetlands in Yantai has been better in recent ten years, and the methods of inshore aquaculture and other utilization have increased. ③ The development and policy of Yantai economy is the main driving force of the change of land use mode. ④ The Yantai city belongs to the retarded type of land use benefit, and the development degree of barely coordinating can′t provide a big impetus for economic development. | |||
| TO cite this article:LIU Luyu,WANG Qiuxian,WU Xiao. Analysis on the current situation of land use and economic development in Yantai city[OL].[ 2 September 2019] http://en.paper.edu.cn/en_releasepaper/content/4749542 | |||
| 2. Analysis on Land Use Dynamic Changes in Qingdao from 2005 to 2015 based on ArcGIS | |||
| Zhuotao Liu,Qiuxian Wang,Xiao Wu | |||
Earth Science 30 August 2019
|
|||
| Show/Hide Abstract | Cite this paper︱Full-text: PDF (502K B) | |||
| Abstract:In order to study the land use change situation of Qingdao in recent 10 years, this paper used the land Use classification system of China\'s coastal zone to overlay the land use of 2015 by visual interpretation with 2005 data in Arcgis10.2. The results showed that the residence of Qingdao increased 1612.3km2, the area of urban mining increased 351.2km2, the area of woodland increased 499.7km2, and the area of arable land decreased 1911.9km2, the grassland areas decreased 342.4km2, and the water body decreased 277.4km2. These changes were mainly due to the speed of urbanization, another reason was that the Government attached importance to environmental issues, vigorously carried out afforestation and returned farmland to forest. The research provided scientific basis for local government departments to formulate targeted land use planning and policies, which is of great practical significance for regional comprehensive, coordinated and sustainable development. | |||
| TO cite this article:Zhuotao Liu,Qiuxian Wang,Xiao Wu. Analysis on Land Use Dynamic Changes in Qingdao from 2005 to 2015 based on ArcGIS[OL].[30 August 2019] http://en.paper.edu.cn/en_releasepaper/content/4749450 | |||
| 3. Interannual variation of the low-level atmospheric eddy kinetic energy over the South China Sea and its relationship with the tropical cyclone formation number | |||
| WANG Lei | |||
| Earth Science 10 February 2018 | |||
| Show/Hide Abstract | Cite this paper︱Full-text: PDF (789K B) | |||
| Abstract:Eddy kinetic energy (EKE) is one key dynamic parameter to characterize atmospheric circulations and synoptic-scale disturbance activities. Investigation of the distribution and variability of atmospheric EKE and related energy conversion components over the South China Sea (SCS) can help us to better understand the dynamics of the SCS monsoon and tropical cyclone (TC) formation in this region. We present our investigation on the interannual variations of low-level (850-hPa) atmospheric EKE over the SCS in this study. Both northern and southern SCS experienced prominent interannual variation in the 850-hPa EKE during their most active EKE months. The energy processes for generation and maintenance of the EKE were analyzed based on the EKE tendency equation. Results suggested that the barotropic energy conversion (BEC) term made the largest contribution to the interannual variation of the EKE over both northern and southern SCS. The interannual variation of the BEC over the southern SCS was mainly modulated by the El Ni?o-Southern Oscillation (ENSO) and had a close anti-correlated relationship with the sea surface temperature (SST) in the eastern equatorial Pacific. In contrast, the interannual variation of the BEC over the northern SCS was identified to be closely associated with the zonal SST gradient between the central equatorial Pacific and northern Indian Ocean. The atmospheric circulation anomalies in responses to SST anomalies enhanced the zonal wind shear over the SCS, giving rise to more BEC. The interannual variation of the BEC over the southern SCS was positively correlated with the TC formation number, with more (less) TCs formed during enhanced (suppressed) BEC years. However, the correlation between the BEC and TC formation number over the northern SCS was not significant, which may be due to the offsetting effects on TC formation by the cooling (warming) of the local SST during enhanced (suppressed) BEC years. These results could improve our understanding of the behaviors and causes of interannual variation in the low-level atmospheric EKE and its relationship with interannual variation of the TC formation number over the SCS. The results highlighted the differences in the regional climate variability between the northern SCS and the southern SCS. ????? | |||
| TO cite this article:WANG Lei. Interannual variation of the low-level atmospheric eddy kinetic energy over the South China Sea and its relationship with the tropical cyclone formation number[OL].[10 February 2018] http://en.paper.edu.cn/en_releasepaper/content/4743499 | |||
| 4. Trend of fatal landslides in China | |||
| ZHANG Fanyu,HUANG Xiaowei | |||
| Earth Science 13 September 2017 | |||
| Show/Hide Abstract | Cite this paper︱Full-text: PDF (1500K B) | |||
| Abstract:There have a large number of slope movements occurred in China annually. Especially, fatal landslides are the most hazardous, causing serious fatalities and significant economic loss. In this study, the data of fatal landslides were collected from China geological environment information site and Ministry of Land and Resources of China in the period 2004-2016. Then a statistical analysis of the data was carried out to explore the trend of fatal landslide and the distribution of its losses in economic and fatality. In the studied period, a total of 4,718 deaths are collected resulting from 537 fatal landslides. It represents a frequency of 42 events and an average of 363 deaths every year. Meanwhile, fatal landslides fatalities are getting closer to total deaths of all geological hazards with the disaster records improvement. Although the economic loss of fatal landslides accounts for a small proportion of all hazards loss, however, the total amount is still enormous, 6.75 billion yuan recorded. The spatial distribution of fatal landslides shows intensive clusters in Southwest and Southern China, particularly densely distributing in Sichuan, Yunnan, and Hunan. Then the temporal distribution reveals a strong correlation with the main raining season, with the largest quantity of events occurring between June and September. Among the fatal landslides of which triggering factors have been recognized, 81.8% are associated with rainfall. This research gives a comprehensive recognition of fatal landslides trend and provides baseline information for disaster prevention and mitigation. | |||
| TO cite this article:ZHANG Fanyu,HUANG Xiaowei. Trend of fatal landslides in China[OL].[13 September 2017] http://en.paper.edu.cn/en_releasepaper/content/4741454 | |||
| 5. Seasonal variation of the low-level atmospheric eddy kinetic energy over the South China Sea and its influences on the tropical cyclone genesis | |||
| WANG Lei | |||
| Earth Science 29 June 2017 | |||
| Show/Hide Abstract | Cite this paper︱Full-text: PDF (4K B) | |||
| Abstract:In this paper, the seasonal variation of the low-level atmospheric eddy kinetic energy (EKE) over the South China Sea (SCS) and its influences on the tropical cyclone (TC) genesis over this region were investigated. Different seasonal cycles of the low-level atmospheric EKE were identified between the northern and southern SCS. Although the minimum EKE occurred in the transition season of spring (March-May) in both northern and southern SCS, July-September were the most active EKE months over the northern SCS, while October-December were for the southern SCS. The energy processes for generation and maintenance of the low-level atmospheric EKE were analyzed based on the EKE tendency equation. Results suggested that eddy geopotential flux term made the largest contribution to the seasonal variation of EKE over the northern SCS, while the largest contributor was from the barotropic energy conversion term over the southern SCS. The months with the most active EKE coincided with the months with the maximum precipitation rate and TC formation number in both northern and southern SCS. TC formations over the SCS were closely related to the EKE tendency associated with the barotropic energy conversion. Regions of enhanced barotropic energy conversion favor the development of synoptic disturbances, which may further grow into TCs. By examining the relative importance of different components in the barotropic energy conversion term, the component associated with the shear of the zonal wind made the largest contribution over the northern SCS; by contrast, the largest contributor to enhanced barotropic energy conversions came from the component related with the convergence of the meridional wind over the southern SCS.????? | |||
| TO cite this article:WANG Lei. Seasonal variation of the low-level atmospheric eddy kinetic energy over the South China Sea and its influences on the tropical cyclone genesis[OL].[29 June 2017] http://en.paper.edu.cn/en_releasepaper/content/4738238 | |||
| 6. Middle Cambrian Diplocraterion parallelum from North China: Ethologic significance and facies controls | |||
| Zhang Lijun,Buatois Luis M.,MáNGANO Gabriela M.,Qi yongan,Tai Chao | |||
| Earth Science 28 April 2017 | |||
| Show/Hide Abstract | Cite this paper︱Full-text: PDF (4K B) | |||
| Abstract:The middle Cambrian Mantou Formation of the Mianchi section of western Henan Province, North China provides an opportunity to address infaunal colonization during the aftermath of the Cambrian explosion. The trace fossil Diplocraterion is common within intertidal very fine-grained sandstone of the Member II of the Mantou Formation (Stage 5). Diplocraterion consists of perpendicular to bedding plane, lined U-shaped burrows with well-developed marginal tubes, having distinctive, dark and light colored, laminae forming retrusive and protrusive spreiten reflecting the activity of a suspension feeder. No scratches are observed on the wall of the marginal tubes. SEM-EDS mapping detection shows that the dark laminae are dominated by Si, Al and Fe, whereas the light laminae are dominated by Ca and Si. Based on ichnological, stratigraphical and SEM-EDS features, it is suggested that the specimens of Diplocraterion studied here results from the equilibrium behavior and that the delayed appearance of this ichnotaxon in North China is due to lack of appropriate siliciclastic facies. | |||
| TO cite this article:Zhang Lijun,Buatois Luis M.,MáNGANO Gabriela M., et al. Middle Cambrian Diplocraterion parallelum from North China: Ethologic significance and facies controls[OL].[28 April 2017] http://en.paper.edu.cn/en_releasepaper/content/4730535 | |||
| 7. The internal anatomy and the cell movement of Lower Cambrian gastrula | |||
| YAO Xiaoyong,ZHENG Yajuan,GUO Junfeng,HAN Jian | |||
| Earth Science 29 March 2017 | |||
| Show/Hide Abstract | Cite this paper︱Full-text: PDF (4K B) | |||
| Abstract:The extraordinarily well-preserved fossil embryos recovered from the Lower Cambrian are known from both cleavage and gastrula stages and, consequently, it has the potential to yield vital insights into developmental evolution at that time. However, they are not generally accepted as gastrula fossils because of the gastrulation processes and internal structures in these embryos are poorly characterized. Here we show rare gastrula specimens in which internal anatomical features preserved. The yolk consumed in the endoderm formation and the pharynx was appeared after the archenteron formed indicates our embryo fossils are most probably 'direct-developing' animals; although the epibolic gastrulation and radial symmetry suggest a cnidaria Sea anemone affinity, the precise phylogenic position of them is still uncertain because of lacking reliable later stages in development; we also present the cell movement of epibolic gastrulas, the embryonic mechanisms have been compared with modern pattern: enveloping layer extension were observed in our fossils; and similar with purse-string-like contraction of marginal cells, the zigzag margin contraction of the epibolic frontier to reduce their perimeter that push the margin forward, all of which hint that the embryonic mechanisms of the modern embryos had evolved in Lower Cambrian. | |||
| TO cite this article:YAO Xiaoyong,ZHENG Yajuan,GUO Junfeng, et al. The internal anatomy and the cell movement of Lower Cambrian gastrula[OL].[29 March 2017] http://en.paper.edu.cn/en_releasepaper/content/4723528 | |||
| 8. Using springtime Atlantic SST as a predictor for summertime western North Pacific subtropical high | |||
| WANG Lei | |||
| Earth Science 23 March 2017 | |||
| Show/Hide Abstract | Cite this paper︱Full-text: PDF (4K B) | |||
| Abstract:The potential of using springtime Atlantic sea surface temperature (SST) to predict the intensity of summertime western north Pacific subtropical high (WNPSH) was examined. The results indicated that springtime north tropical Atlantic (NTA) SST had a close correlation with summertime WNPSH and could be used as a predictor. Since the early-1990s, the springtime NTA SST tended to have higher correlations with the WNPSH intensity, compared with other springtime predictors including the Indo-Pacific SST, El Ni?o-Southern Oscillation (ENSO) tendency and the North Atlantic Oscillation (NAO). Physically, the NTA SST could influence the WNPSH intensity by inducing the subtropical teleconnection and/or anomalous cross-basin vertical overturning circulation linking the tropical Atlantic and western Pacific. Both statistical relationship and underlying physical mechanism support the springtime NTA SST as a predictor for summertime WNPSH intensity. Including the springtime NTA SST as a predictor in the empirical prediction model could increase the prediction skill for summertime WNPSH intensity.? | |||
| TO cite this article:WANG Lei. Using springtime Atlantic SST as a predictor for summertime western North Pacific subtropical high[OL].[23 March 2017] http://en.paper.edu.cn/en_releasepaper/content/4722971 | |||
| 9. Association of the East Asian subtropical westerly jet with the Southwest Asian summer monsoon: A diagnostic analysis on heavy rain events in Yunnan Province, China | |||
| CHEN Jie,JIN Liya | |||
| Earth Science 23 February 2017
|
|||
| Show/Hide Abstract | Cite this paper︱Full-text: PDF (4K B) | |||
| Abstract:By using daily observations and the NCEP/NCAR reanalysis data during 1960-2011, a diagnostic analysis is performed to investigate the association of the East Asian subtropical westerly jet (EASWJ) with the Southwest Asian summer monsoon (SASM) on heavy rain events in Yunnan Province of southwest China during SASM prevailing season. The diagnostic analysis shows an anomalous divergence circulation pattern at upper level (200 hPa) over Eurasian continent that corresponds well to the negative anomaly of EASWJ intensity during the heavy rain events in boreal summer in Yunnan Province. Meanwhile, a low-level jet stream with abundant water vapor originated from the Arabian Sea and Bay of Bengal provides necessarily dynamic and water conditions for heavy rain mechanism. The study further shows that the weakening of the EASWJ during heavy rain events in Yunnan Province is associated with the decrease in the meridional air temperature gradient in northern mid-latitude (30o-45oN). | |||
| TO cite this article:CHEN Jie,JIN Liya. Association of the East Asian subtropical westerly jet with the Southwest Asian summer monsoon: A diagnostic analysis on heavy rain events in Yunnan Province, China[OL].[23 February 2017] http://en.paper.edu.cn/en_releasepaper/content/4719965 | |||
| 10. Reactive Transport Modeling of Long-Term CO2 Sequestration Mechanisms at the Shenhua CCS Demonstration Project, China | |||
| YANG Guodong,LI Yilian,ATRENS Aleks,LIU Danqing,WANG Yongsheng,JIA Li,LU Yu | |||
| Earth Science 31 May 2016 | |||
| Show/Hide Abstract | Cite this paper︱Full-text: PDF (4K B) | |||
| Abstract:Carbon dioxide injection into deep saline aquifers results in a variety of strongly coupled physical and chemical processes. In this study, reactive transport simulations using a 2-D radial model were performed to investigate the fate of the injected CO2, the effect of CO2-water-rock interactions on mineral alteration, and the long-term CO2 sequestration mechanisms of the Liujiagou Formation sandstone at the Shenhua CCS pilot site of China. Carbon dioxide was injected at a constant rate of 0.1 Mt/year for 30 years, and the fluid flow and geochemical transport simulation was run for a period of 10,000 years by the TOUGHREACT code according to the underground conditions of the Liujiagou Formation. The results show that different trapping phases of CO2 vary with time. Sensitivity analyses indicate that plagioclase composition and chlorite presence are the most significant determinants of stable carbonate minerals and CO2 mineral trapping capacity. For arkosic arenite in the Liujiagou Formation, CO2 can be immobilized by precipitation of ankerite, magnesite, siderite, dawsonite, and calcite for different mineral compositions, with Ca2+, Mg2+, Fe2+ and Na+ provided by dissolution of calcite, albite (or oligoclase) and chlorite. This study can provide useful insights into the geochemistry of CO2 storage in other arkosic arenite (feldspar rich sandstone) formations at other pilots or target sites. | |||
| TO cite this article:YANG Guodong,LI Yilian,ATRENS Aleks, et al. Reactive Transport Modeling of Long-Term CO2 Sequestration Mechanisms at the Shenhua CCS Demonstration Project, China[OL].[31 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4694633 | |||
| Select/Unselect all | For Selected Papers |
Saved Papers
Please enter a name for this paper to be shown in your personalized Saved Papers list
|
|
 |
|
||||||||||||||
About Sciencepaper Online |
Privacy Policy |
Terms & Conditions |
Contact Us
Technology Partner - CERNET