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1.
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2.
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Sacks��Ӧ����Ĺ۲������� 总被引：5，自引：0，他引：5
?о??????Sacks??????????????????????????????????????о??й????????????????????????о???????????????????????????????????о????????????????????????????6?Sacks??????????ε?????????????????????????????伫?????????????????????????????? 相似文献
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??????????????????????о??????????????????е?Ч??,???????????????????????????????????????????????????????о????????:1)????????????????????????????о??????????????????Ч??????????????;2)??????????????????Ч?о?????????????????????????????????????????п????;3)??????????????????????????????????????????????????????????? 相似文献
5.
???????????????????????????????????о???????????????????????????????????????????????????????????????NEE??????????ж???EW??????????????NEE?????????????????????????????????????????????????????????????????о?????????????????????????????????????о???????? 相似文献
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���տ������山��Ե��Ҫ�����ֽ��Է��� 总被引：5，自引：0，他引：5
????GPS??????????????山???????α????????????????????????????о??????????????о?????????????????????????????????????????С??????????????о???????????????????????????????-???????????????-?????????????????????????????????-?????????????????????????????-??????????-????????????????????????????????? 相似文献
7.
??????????????ITRF??????μ???????????????????????????????????????????????????????о????????????????????????????????????????????о????????????????????????????????????????????????????????????????????ο??????м????????????????о????????????????????????Ч?????????????????????????Ч???ο???????Ч??? 相似文献
8.
�����ɽ����������仯��������۲��о��Ľ�չ����״ 总被引：6，自引：4，他引：2
孙文科 《大地测量与地球动力学》2008,28(4):44-53
????λ???????о????????????????????????????е????,?????????????????????ε???????λ?????????????????仯?о??????3????????λ??????????????????????????????????????????????????????????????????????????????????仯???????????о??????????????? 相似文献
9.
???????????????о???????????????????????????????????????о????о??????????1??????????????????????????????????????????????????????л???2??????????????????????????????????3????????????????????????????????????????4?????????????????????????????????????????????????5???????????￡?????????????Ms3.0??4.0????????? 相似文献
10.
??????????????24??????????????????????????????α?????????????????????????о????????α???????????????????????????????????????α????????????????????????????????????????????????????????????仯?????????????????′?1994??????????????????????????????????????????????2??3???о?????????????????????????γ?????????????????????????е????????????????????????????????о??????????Χ???????????????????????????????????????????????????????й?? 相似文献
11.
将测高重力异常、局部大地水准面和垂线偏差作为输入数据,计算海洋垂直重力梯度异常。以中西太平洋海域作为研究对象,对垂直重力梯度异常和海底地形的相关性进行分析,在20~200 km波段范围内利用梯度异常推估海底地形。结果表明,反演地形的相对精度在7.14%左右,在多海山地区精度较差。 相似文献
12.
利用多种测高数据反演中国南海海域重力异常 总被引：1，自引：0，他引：1
联合Geosat/GM、ERS-1/168和Envisat 3种测高数据,基于高精度地球重力模型EGM2008,采用垂线偏差方法和逆Vening-Meinesz公式,利用移去-恢复技术确定了中国近海及邻近海域(0°N～42°N,102°E～138°E)分辨率为2′×2′的重力异常.在中国南海海域,测高重力异常与船测重力... 相似文献
13.
The spatial connections of endogenous deposits with anomalies of the vertical density gradient in lithosphere,calculated on the formulas for the spherical gravity sources are analyzed for Amur Province. The spatial parameters of tin-bearing, tungsten-bearing and gold-bearing regional ore-magmatic systems (ore regions, belts, zones and areas) are characterized by correlation of deep gradient density anomalies in the crust and upper mantle with the extensivity of superficial ore mineralization. Tin-ore deposits are mainly connected with density heterogeneities of the upper crust layer (up to a depth of 20 km), and tungsten, molibdenium and polymetallic deposits-with anomalies of the density gradient in the low crust layer (at a depth of 30 km) and in the upper mantle (at a depth of 60～70 km). Gold-ore regions are characterized by the greatest vertical range of fluid-magmatic systems (about 100 km from the surface) and arethrough ones in relation to mantle and crust tectonic structures. Opportunity is shown for the 3D density gradient model of the Amur Province lithosphere to be applied for constructing the forecast metallogenic models. 相似文献
14.
NUMERICAL STUDY ON THE INTERANNUAL OSCILLATION OF SEA SURFACE TEMPERATURE IN THE SOUTH CHINA SEA 总被引：5，自引：0，他引：5
A two and a half layer oceanic model of wind-driven, thermodynamical general circulation is appliedto study the interannual oscillation of sea surface temperature (SST) in the South China Sea (SCS). Themodel consists of two active layers: the upper mixed layer (UML) and the seasonal thermocline, with themotionless abyss beneath them. The governing equations which include momentum, continuity and sea.temperature for each active layer, can describe the physics of Boussinseq approximation, reduced gravityand equatorial β-plane. The formulas for the heat flux at the surface and at the interface between twoactive layers are designed on the Haney scheme. The entrainment and detrainment at the bottom of theUML induces vertical transport of mass,momentum and heat, and couples of dynamic andthermodynamic effect.Using leap-frog integrating scheme and the Arakawa-C grid the model is forced bya time-dependent wind anomaly stress pattern obtained from category analysis of COADS. The numerical results indicate that t 相似文献
15.
对经典移去-恢复法进行改进,利用EGM2008地球重力场模型、地表重力/GPS联合观测数据和ASTER数字地形模型,提出考虑地形梯度特征的区域重力场校准算法,同时针对我国动态重力区域网布设情况,对重力场的校准区域范围进行更为合理的设定。通过与经典移去-恢复法在川西地区实际应用的比较发现,改进模型能够将川西地区重力场模型数据的标准差从65.09 mGal降至61.24 mGal,在结合地形梯度影响后,能够将标准差进一步降至59.31 mGal。采用国际重力局最新发布的283个重力数据对喜马拉雅东构造结及邻区的重力场进行校准,结果表明,布格重力异常和地形数据有很强的正相关,该区中东部存在明显的均衡重力异常低值区。 相似文献
16.
?о???????????η????????????????С???????÷??????3??2°×2°?????????к????????????????????????????????????????????С???????÷??????????????????????????????????????????????????????????FFT????????????????????????С???????÷?????????????ε????????????????????η????????ì???????????????????????????????????????????????????????????Σ??????????????????????????????μ?????????? 相似文献
17.
?????????????????????????????????????????????????????????й???????????????????????????ETOPO2v2????????????????????й????????????2???2????????Σ?????ETOPO2v2??????????????б??????????????????????Ч??? 相似文献
18.
Nonlinear numerical models of continuously stratified seas are developed for vertical sections to study the mechanism of coastal
upwelling and coastal jets in two kinds of seas: the so-called finite or closed sea bounded by two vertical coastal coasts,
without elevation of sea surface, but with a flat bottom; and the semi-infinite sea bounded by only one vertical coast, with
both an elevation of sea surface and a flat or inclined bottom. Constant wind stress in the first case, and constant wind
stress or negative wind stress curl in the second case, are abruptly imposed. The key procedure for the mathematical analysis
is to calculate the horizontal pressure gradient first by a special treatment. In the first case, the variation of horizontal
components of velocity is changed with time to show three successive time intervals. The results show that the width of baroclinic
jets depends upon (σS)1/2, and that distribution of isopycnic lines delineates the warm and cold regions. The relative importance of each term in the
equilibrium among forces is thus determined. Distribution of stream function in vertical section reveals the upper and bottom
Ekman layers. Two coastal jets are found with different alongshore velocities. The distribution of density anomalies displays
the horizontal diffusion adjustment. An unstable case appears at different surface boundary conditions. In the second case,
the vertical velocity will be stronger in the sea with less stratification, with an inclined bottom, and with a negative wind
stress curl. The horizonatal offshore velocity increases in strength in a sea with inclined bottom and with negative wind
stress curl. The vertical circulation pattern reveals the upwelling only. The distribution of density shows the isopycnic
lines lifted upward near the shores. Obviously, the range of elevation of sea surface near the shore is larger than that far
offshore. The jet width is less than the Rossby radius of deformation. A stronger jet will occur in more shallow water with
negative wind stress curl. The coastal jet does not develop when the coefficient of horizontal turbulence increases to a certain
limiting value. 相似文献
19.
��ظ�ԭ����Ե�����仯�����о� 总被引：2，自引：0，他引：2
??????????????????????????????????????????????????1993??2003??????????仯?????? ????????????????????????????????????????????????о????????????????????????????????, ?ó????????????????仯?????????????????????????й????????????????????????????????????????????????????????????????????,???????????о??????????κ?λ??????????仯????????????????????????????????仯??????????????????????????? 相似文献
20.
对中国大陆7次强震前出现的典型重力场变化图像（梯度带和四象限）及其量化参数进行总结。结果表明,目前采用的地震预测指标具有一定的不确定性,与测网观测时段、测点空间分布、变化幅值空间差异等具有密切关系;芦山地震前潮汐因子异常空间范围是流动重力典型变化范围的近10倍,可能与连续重力观测站的精度比流动重力联测高1个数量级有关。基于闭锁剪力模式提出利用典型重力变化图像进行地震数值预测的方法,强震前在孕震源存在的双力偶闭锁剪力的持续作用下,走滑型力偶会在地表引起四象限重力变化,倾滑型力偶会在地表引起二象限（梯度带）重力变化。预测回溯算例实验结果初步表明,该方法对走滑型和倾滑型地震的震级预测较为有效,同时可给出未来地震的地点和类型。 相似文献