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71.
Ghazi Falah Dr. 《GeoJournal》1990,21(4):397-410
This paper attempts to reconstruct the way of life of a Palestinian Bedouin group living in Galilee, N Palestine, during the 19th century and established as semi-nomads. The term semi-nomadic is used here to indicate a distinctive life-style that is an amalgam of both pastoral nomadic and sedentary habits.The paper is based largely on primary sources, notably the narratives of 19th century European travellers-authors in Palestine. It introduces to the study of the cultural geography of Palestine and nomadism a methodological approach in which fragmentary pieces of information recorded in historical literature are utilized in order to evaluate spatial changes and processes.Paper originally presented at the International Conference of Historical Geographers, Cukanzus, Oxford '83 Oxford 17–23 July 1983. 相似文献
72.
Coherency spectra derived from time series of stratospheric quantities indicate oscillations in the frequency range below 0.5 d–1 which are correlated on a global scale. Satellite observations of total ozone and stratospheric radiance (BUV and SIRS, Nimbus4, April–November 1970) have been used to derive phase relationships of such oscillations. As an example, an oscillation of total ozone with a period of 7.5 d and zonal wave number zero is analyzed in detail. The basic assumption is made and tested, that the oscillation reflects stratospheric planetary waves as obtained from Laplace's tidal equations. The observed latitudinal phase shifts for the total ozone oscillation are in good agreement with theoretical predictions. It is concluded from the observations of ozone and radiance that mainly divergence effects related to global-scale waves are responsible for the 7.5 d oscillations of total ozone at high and middle latitudes and at the equator whereas in the latitude range 10°S–20°S predominantly temperature effects are important. Meridional wind amplitudes of some 10 cm/s are sufficient to explain the high and mid-latitude ozone oscillations. At low latitudes vertical wind amplitudes of about 0.2 mm/s corresponding to height changes of the ozone layer of roughly ±20 m are obtained. 相似文献
73.
Ghazi Falah 《The Professional geographer》1992,44(1):30-44
This study demonstrates the linkage between national policy and its spatial expression at the local level. The Palestinian-Israeli conflict is shown to have significance within local government jurisdiction areas, manifested here through the ethnic dichotomization within the Nazareth conurbation in northern Israel. Government policy, both at the national and local levels, is responsible for uneven development between the Jewish and Arab municipalities. Land fragmentation and patterns of spatial control function to constrain and stunt urban growth and development in Arab Nazareth and the neighboring Arab urbanized villages. 相似文献
74.
Structural interpretation of surface and subsurface data in the Eastern foreland basins of Tunisia, allows us to recognize positive inversion structures, i.e. related to compressional events, expressed and recorded in the Paleogene sedimentary pile of the Atlas domain. These episodes are followed by a period of relative tectonic quiescence during Oligocene-Early Miocene with development of extensional structures with slightly tilted panels, grabens and locally the development of listric normal faults branched at depth on “décollement” levels.Comparison of the seismic interpretations and field data collected along the South Atlas Front as well as in the Atlas belt, allows us to propose a tectonic scenario at the scale of Eastern Tunisia Atlas. In particular, we emphasise the role of the so-called “Atlas event” (Middle-Late Eocene), which was initially defined in Algeria but poorly outlined in Tunisia. We will show that the tectonic agenda defined in Eastern Tunisia is consistent with the one proposed elsewhere in the Maghreb allowing us to propose a unified view of the geodynamic evolution of the whole Atlas system during this period.The negative inversion recorded during Oligocene-Early Miocene along with the occurrence of synsedimentary normal faults are related to an increase of the subsidence rate in the frame of continuous shortening coeval to basin formation in the front of the Atlas. The whole Oligo-Miocene evolution results from two different mechanisms: flexuration in the front of the Atlas and the onset of the extension of the Pantelleria-Linosa-Malta rift system of central Mediterranean, which attained a climax stage later during Pliocene-Quaternary. 相似文献
75.
The main objective of this study was to assess the spatial and temporal variability of groundwater level fluctuations in the
Amman–Zarqa basin, during the period 2001–2005. In the year 2003, as a consequence of war, there was a sudden increase in
the population in this basin. Knowing that the basin is already heavily populated and witnesses most of the human and industrial
activities in Jordan, this study was prompted to help make wise water resources management decisions to cope with the new
situation. Data from 31 fairly distributed wells in the upper aquifer of the basin were subjected to geostatistical treatment.
Kriging interpolation techniques have indicated that the groundwater flow directions remained almost constant over the years.
The two main directions are SW–NE and E–W. Kriging mapped fluctuations have also showed that drop and rise events are localized
in the basin. Forecasting possibilities for management purposes were tackled using autocorrelation analysis. The constructed
autocorrelograms indicated, in general, the temporal dependence of seasonal water level fluctuations, and that forecasting
can be carried out within a period of 3–21 months. Several suggestions were made to mitigate the drop and rise hazards in
the detected sites. 相似文献
76.
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78.
Black and white dolomite crystals (mm to cm width) of different isotopic composition are associated with Triassic diapirism in central Tunisia, as well as with evaporite minerals and clays. The white dolomites occur mostly in the Jabal Hadifa diapir near the contact with Cretaceous limestones, whereas the smaller black dolomites occur in the Jabal Hamra diapir. The former dolomite has a narrow range of δ18O and δ13C values (− 3.83‰ to − 6.60‰ VPDB for δ18O; − 2.11‰ to − 2.83‰ VPDB for δ13C), whereas the latter dolomite has a wider range and more depleted values (− 4.92‰ to − 9.97‰ for δ18O; − 0.55‰ to − 6.08‰ for δ13C). However, the 87Sr / 86Sr ratios of most of the samples are near Triassic seawater values. Dolomite formation is due to at least two different fluids. The main fluid originated from deeper hydrothermal or basinal sources related to the Triassic saliferous rocks and ascended through faults during the diapiric intrusion. The second, less important fluid source is related to meteoric water originating from Cretaceous rocks. 相似文献
79.
Feki-Sahnoun Wafa Njah Hasna Hamza Asma Barraj Nouha Mahfoudi Mabrouka Rebai Ahmed Bel Hassen Malika 《Ocean Dynamics》2020,70(7):897-911
Ocean Dynamics - The blooms of the toxic dinoflagellate Karenia selliformis can be predicted with accuracy derived from knowledge of the main forcing variables. A naive Bayes classifier modeling... 相似文献