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	1. The mechanism of seismo-magnetic anomaly before the earthquake and its role in earthquake prediction
	Chu Qingzhong,Li Hui,Wu Ze,Liang Wubin,Chen Xiaozhe,Shi Peibing
	Earth Science 25 September 2014
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	Abstract:In this paper introduces three aspects of content: cause of earthquake; magnetic anomaly analysis before the earthquake; the relationship of magnetic anomaly and earthquake magnitude. Through the research of WenChuan earthquake, introduce seismo-magnetic anomaly detailedly. This paper also introduces the application of wavelet analysis in interference rejection and Date Processing, provides effective method for seismo-magnetic observation.
	TO cite this article:Chu Qingzhong,Li Hui,Wu Ze, et al. The mechanism of seismo-magnetic anomaly before the earthquake and its role in earthquake prediction[OL].[25 September 2014] http://en.paper.edu.cn/en_releasepaper/content/4609376


	2. Mechanisms of metabolic changes of the diatom Phaeodactylum tricornutum in response to phosphorus limitation by proteomic analysis
	FENG Tianya,YANG Zhikai,LI Hongye
	Earth Science 28 August 2014
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	Abstract:Phosphorus (P), as an important macronutrient, is essential for the survival of marine phytoplankton. To further understand the phytoplankton response to the phosphorus limitation in the ocean at the cellular and molecular levels, proteomics profiling was carried out in the marine diatom Phaeodactylum tricornutum. Total 44 significantly changed nonredundant proteins were identified, among which 9 proteins were upregulated and the other 35 were downregulated. Interestingly, proteins associated with inorganic phosphate uptake were downregulated, while the protein involved in organic phosphorus uptake was upregulated, such as the alkaline phosphatase. Generally, except that a few metabolic responses were elevated, such as stress-shock proteins, protein degradation, lipid accumulation, and photorespiration, etc; many more metabolic activities tended to be downregulated, including energy metabolism,photosynthesis, amino acid and nucleic acid metabolisms, etc. Taking all into consideration, this work directly showed how P. tricornutum coordinated the multiple metabolic pathways adapted to phosphorus stress at the protein level, hence improving our knowledge of the role of P in the marine biogeochemical cycles and the phytoplankton response to P limitation in the ocean. Also, it provides some insight into the succession of phytoplankton community, providing a scientific basis for elucidating the mechanism of algal blooms.
	TO cite this article:FENG Tianya,YANG Zhikai,LI Hongye. Mechanisms of metabolic changes of the diatom Phaeodactylum tricornutum in response to phosphorus limitation by proteomic analysis[OL].[28 August 2014] http://en.paper.edu.cn/en_releasepaper/content/4607914

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	3. Methane emissions from mud volcanoes in the Southern Junggar Basin, China
	Wan Zhifeng
	Earth Science 30 July 2014
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	Abstract:Methane emissions from geological sources have recently been recognised as an important component of the atmospheric methane budget. Mud volcano eruptions are an important source of methane gas emissions. A mud volcano is a geological structure formed as a result of the emission of argillaceous material on the Earth's surface or sea floor. Mud volcanoes are widely distributed, and their methane emissions are enormous. Increasing methane emissions from mud volcanoes would mean a significant increase in natural carbon emissions worldwide, with a corresponding significant effect on the worldwide environment. The annual methane emission of a single mud volcano in the southern margin of Junggar Basin, northwestern China, equals up to 666.20 m3. Additionally, the estimated annual methane emissions might be up to 3.33 × 107 m3 in the study area, which measures 200 × 100 m2. Thus, more attention should be focused on the methane emitted from mud volcanoes.
	TO cite this article:Wan Zhifeng. Methane emissions from mud volcanoes in the Southern Junggar Basin, China[OL].[30 July 2014] http://en.paper.edu.cn/en_releasepaper/content/4605218


	4. Medium effect on the characteristics of the coupled seismic and electromagnetic signals
	HUANG Qinghua,ZHANG Dan
	Earth Science 01 July 2014
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	Abstract:The recently developed numerical simulation technique can simulate the coupled seismic and electromagnetic signals for a double couple point source or a finite fault planar source. Besides the source effect, the simulation results based on the above method showed that both medium structure and medium property could affect the coupled seismic and electromagnetic signals. The waveform of coupled signals induced by a layered medium structure model is more complicated than that induced by a simple uniform medium structure model. The seismic and electromagnetic signals showed different responses to the variations of medium properties such as salinity and viscosity.
	TO cite this article:HUANG Qinghua,ZHANG Dan. Medium effect on the characteristics of the coupled seismic and electromagnetic signals[OL].[ 1 July 2014] http://en.paper.edu.cn/en_releasepaper/content/4602909


	5. Optical dating of the high lake level events documented in the core drilled in the Dengkou Subuplift within the huge Jilantai-Hetao Basin
	ZHANG Fu,FAN Yuxin,CHEN Xiaolong,ZHANG Fan,LIU Wenhao,WANG Jin
	Earth Science 23 June 2014
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	Abstract:Dengkou Subuplift is a sensitive area to lake level changes of the close neighboring Jilantai Subdepression within the Jilantai-Hetao Basin. The entire stratigraphic sequence of the core DK12 drilled on the Dengkou Subuplift revealed that the present sandy land in the area of the Subuplift Dengkou was evolved from a shallow lake with several cycles of regression and transgression. OSL dating results indicate that the Dengkou Subuplift was once covered by a lake during three intervals, such as sometime prior to 76 ka, 52-39 ka and 13-8 ka. Combining with the previous investigations and dating results on shorelines within subdepressions (e.g. Jilantai), these results further support that if there was the so-called Megalake Jilantai-Hetao covering the most area of the Jilantai Basin and the Hetao Basin, the highest lake level should be sometime prior to 76 ka and likely before 90 ka if OSL ages of k-feldspar were widely accepted. However, the Dengkou Subuplift was covered by eolian sand accumulation, most like a lakeshore and desert in the intervals of 76-52 ka and 39-13 ka respectively. During the time span of 52-39 ka, area of the Dengkou Subuplift was submerged by a high lake level, which might be originated from a northward shift of the center of the Jilantai-Hetao Basin as a response to the accelerated uplift of the Qinghai-Tibet Plateau. During 13-8 ka, the Dengkou Subuplift was flooded again by the inflow of the Yellow River through the present southeast Ulan Buh Desert to form the namely Tushenze lake.
	TO cite this article:ZHANG Fu,FAN Yuxin,CHEN Xiaolong, et al. Optical dating of the high lake level events documented in the core drilled in the Dengkou Subuplift within the huge Jilantai-Hetao Basin[OL].[23 June 2014] http://en.paper.edu.cn/en_releasepaper/content/4602039


	6. Numerical simulation of the electromagnetic-wave-induced shear horizontal wave logging for measuring shear velocity in a porous formation
	Guan Wei,Cui Naigang,Hu Hengshan
	Earth Science 03 March 2014
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	Abstract:A method is proposed for measuring the shear wave velocity by using the electromagnetic-wave-induced shear horizontal (SH) wave logging. In this method, a horizontal current loop that exits the transverse electric wave is located in the borehole and the induced SH wave is received at the borehole wall due to the electrokinetic effect in porous formation. Numerical simulations of the logs are implemented in different fluid-saturated porous formations, and the shear wave velocities are directly extracted from the simulated full waveforms. Compared to the acoustic logging, the method is not restricted by the formation and the source frequency.
	TO cite this article:Guan Wei,Cui Naigang,Hu Hengshan. Numerical simulation of the electromagnetic-wave-induced shear horizontal wave logging for measuring shear velocity in a porous formation[OL].[ 3 March 2014] http://en.paper.edu.cn/en_releasepaper/content/4588598


	7. Relationship between fossil chironomid and water depth: a tool for reconstructing past hydroclimatic changes in arid Northwestern China
	Jianhui Chen,Enlou Zhang,Stephen J Brooks,Xiaozhong Huang,Haipeng Wang,Jianbao Liu,Fahu Chen
	Earth Science 03 March 2014
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	Abstract:A significant relationship between the distribution and abundance of chironomids and water depth has long been recognized. However, few studies have been carried out on this topic in arid regions where the chironomid community is usually controlled by water salinity. Thus Bosten Lake, the largest inland freshwater lake (approx. 1200 km2) in China and located in the northwest of the country, provides a unique opportunity to investigate this relationship in an arid region. A total of 42 surface sediment samples, from water depths of 0 m to 17 m, and 12 chironomid taxa were used in the analysis. The first PCA axis explained 59.3% of the variance in the chironomid assemblage and there was a significant correlation between PCA axis 1 scores and water depth (r2 = 0.84, P < 0.001). The chironomid assemblages significantly changed at 8.0 m. This threshold corresponded to an abrupt change in the underwater slopes and the spatial pattern of aquatic vascular plants. RDA showed that the abundance of Chironomus plumosus-type, Microchironomus and Cryptochironomus was positively correlated with water depth, whereas the abundance of Tanytarsus, Polypedilum nubifer-type, Cricotopus and Psectrocladius sordidellus-type was negatively correlated with water depth. These ecological relationships have been supported by the literature. The qualitative chironomid-inferred changes in lake level and qualitative diatom-inferred changes in salinity from a sediment core BSTC001 were also compared. The close agreement in trends of these two variables validates the use of chironomid assemblages to study palaeo-hydrological variability in this westerly-dominated arid region.
	TO cite this article:Jianhui Chen,Enlou Zhang,Stephen J Brooks, et al. Relationship between fossil chironomid and water depth: a tool for reconstructing past hydroclimatic changes in arid Northwestern China[OL].[ 3 March 2014] http://en.paper.edu.cn/en_releasepaper/content/4587934


	8. Ontology-driven spatial analysis for hydrometeorological disaster information managment of Minjiang River basin
	Ao Tianqi,YangJun
	Earth Science 25 February 2014
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	Abstract:This thesis focuses on the ontology-driven spatial analysis for hydrometeorological disaster information management, creates an ontology model of basin hydrometeorology based on Mereotopology and positioning theory and develops the management system of hydrometeorological disaster information of Minjiang River basin. The results of experiments have showed that this system not only can store abundant resource information of hydrology, geography and climate, but also is able to demonstrate the inner connection between the existing state and the changing trend of basin hydrometeorology through spatial analysis technology. This research explores a new way for combining ontology with hydrometeorological disaster information management.
	TO cite this article:Ao Tianqi,YangJun. Ontology-driven spatial analysis for hydrometeorological disaster information managment of Minjiang River basin[OL].[25 February 2014] http://en.paper.edu.cn/en_releasepaper/content/4587068


	9. Geologic characteristics of the Chang'E-3 exploration region
	ZHAO Jiannan,HUANG Jun,QIAO Le,XIAO ZhiYong,HUANG Qian,WANG Jiang,HE Qi,XIAO Long
	Earth Science 21 January 2014
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	Abstract:We present topographic, geomorphologic and compositional characteristics of a 1 ×1 (~660 km2) region centered near the landing site of Chang'E-3 using the highest spatial resolution data available. We analyze the topography and slope using Digital Terrain Model (DTM) generated from Terrain Camera (TC) images. The exploration region is overall relatively flat and the elevation difference is less than 300 m, and the slopes of 80% area are less than 5 . Impact craters in the exploration region are classified into four types based on their degradation states. We investigate the wrinkle ridges visible in the exploration region in detail using TC and Lunar Reconnaissance Orbiter (LRO) Narrow Angle Camera (NAC) images. We calculate FeO and TiO2 abundances using Multispectral Imager (MI) data, and confirm two basaltic units: the northern part belongs to Imbrian low-Ti/very-low-Ti mare basalts, and the southern part is Eratosthenian low-Ti/high-Ti mare basalts. Finally, we produce a geological map and propose the geologic evolution of the exploration region. We also suggest several rover traverses to explore interesting targets and maximize the potential scientific output.
	TO cite this article:ZHAO Jiannan,HUANG Jun,QIAO Le, et al. Geologic characteristics of the Chang'E-3 exploration region[OL].[21 January 2014] http://en.paper.edu.cn/en_releasepaper/content/4582936


	10. Mechanism and estimation of the pockmarks in the subaqueous Yellow River delta
	LIU Hongjun,WANG Hu
	Earth Science 17 December 2013
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	Abstract:The genesis mechanism and estimation method of pockmarks in the subaqueous Yellow River delta are investigated experimentally and theoretically, in which the wave-induced seepage is particularly considered. First of all, laboratory simulation tests were carried out to explore the response of silty seabed under cyclic loads, in which the layers and the saturation of seabed were considered. Excess pore pressure and seepage-related phenomenon was observed. The excess pore pressure was found to decrease more rapidly at the surface layer and the scale of seepage channels would be bigger with bigger amplitude of the cyclic loads and lower saturation of the underlying layer. In addition, the relationship between wave-induced seepage and pockmark was discussed, and the estimation of wave-induced seepage was proposed. Then, Mathematical model to simulate wave-induced excess pore pressure in the seabed was given. The model was then verified and corresponding parameters were calibrated by comparing with the laboratory tests results. Furthermore, the model was applied to the on-site Yellow River delta, in which different wave conditions and different stratifications of the seabed were considered. The genesis mechanism of pockmarks was summarized through the calculated results and the existing in-situ investigations. The wave-induced seepage in the seabed is a direct cause of the pockmarks in the subaqueous Yellow River delta; Extreme storm waves are necessary external factors; The surface hard layer and the underlying unsaturated weak layer would be certain internal factors; Scour and transport that caused by wave and current would be factors that contribute to the late reformation of the pockmarks in the subaqueous Yellow River delta.
	TO cite this article:LIU Hongjun,WANG Hu. Mechanism and estimation of the pockmarks in the subaqueous Yellow River delta[OL].[17 December 2013] http://en.paper.edu.cn/en_releasepaper/content/4574705

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