The streamside effect in a Carex lyngbyeiestuarine marsh: The possible role of recoverable underground reserves     

John L. Gallagher  Harold V. Kibby 《Estuarine, Coastal and Shelf Science》1981,12(4):451-460

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Book reviews     

A. B. Mukerji  Harold Carter  H. Kadomura  L. Peeters  Y. Verhasselt  Wolf Tietze  Gerhard Kortum  C. Chr. Liebmann  Gösta Erikson 《GeoJournal》1981,2(2):190-204

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Sudden commencement associated discontinuities in the interplanetary magnetic field observed by IMP 3     

Harold E. Taylor 《Solar physics》1969,6(2):320-334

The magnetic field measurements made by the magnetic field experiment on the IMP 3 (Explorer 28) spacecraft have been examined at the time of geomagnetic s.s.c. events. Thirty-six such events occurred while IMP 3 was in the interplanetary medium during 1965, 1966 and 1967 and have been analysed. Of these events 8 must have been tangential discontinuities, 2 are either tangential discontinuities or rotational discontinuities and 26 are possible shock waves. (Two of these 26 events have been shown by other authors to be shocks.) These 26 possible shocks have similar magnetic signatures: an increase of 20 % or more in the magnetic field magnitude and a relatively small (always less than 90°) change in direction. The larger s.s.c. events were more likely to be caused by possible shocks while the smaller events were often associated with tangential discontinuities. The orientation of the discontinuity surfaces of the 26 possible shocks shows a preference to be aligned somewhere between a direction perpendicular to the sun-earth line and a direction tangent to the local spiral angle of the magnetic field. It was possible to associate solar flares with 14 of the 26 possible shock events. Of these 14, a reliable orientation was deduced for 8 events. By considering the orientation of these 8 events in relation to the position of the parent flares on the solar disk it is suggested that a typical shock front propagating out from the sun has a radius of curvature less than but of the order of 1 AU.NAS/NRC Postdoctoral Resident Research Associate.  相似文献   

A Modification of Lomnitz's Law of Creep in Rocks     

Harold Jeffieys 《Geophysical Journal International》1958,1(1):92-95

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Differential rotation of the solar electron corona     

Richard T. Hansen  Shirley F. Hansen  Harold G. Loomis 《Solar physics》1969,10(1):135-149

Autocorrelation analyses of K-coronameter observations made at Haleakala and Mauna Loa, Hawaii, during 1964–1967 have established average yearly rotation rates of coronal features as a function of latitude and height above the limb. At low latitudes the corona was found to rotate at the same rate as sunspots but at higher latitudes was consistently faster than the underlying photosphere. There were differences as large as 3–4% in the rate at specific latitudes from year to year and between the two hemispheres. In 1967 a nearly constant rotation was found for heights ranging from 1.125 to 2.0 R ₀. For 1966 there was a more complicated pattern of height dependence, with the rate generally decreasing with height at low latitudes and increasing at high latitudes.At Hawaii Institute of Geophysics.  相似文献   

The Reduction of Gravity Observations     

Harold Jeffreys 《Geophysical Journal International》1959,2(1):42-44

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Dynamics of the moon     

Harold Jeffreys 《Physics of the Earth and Planetary Interiors》1971

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TREND SURFACE ANALYSIS OF GLACIALLY BURIED PLEISTOCENE ORGANIC DEPOSITS IN CENTRAL MICHIGAN*     

Bruce L. Rhoads  Richard L. Rieck  Harold A. Winters 《The Professional geographer》1984,36(1):64-73

Trend surfaces were determined and compared for the bedrock surface, two characteristics of the present topography, and 42 water well log reports of glacially buried carbonaceous horizons within drift from an area in central Michigan. Data almost certainly indicate that the glacially buried Pleistocene organic deposits represent two or more pre-Woodfordian paleosurfaces. Trend surface analysis of buried organic horizons may be useful for recognizing paleosurfaces and separating drift sheets in other areas with limited subsurface data.  相似文献   

Keep it clean and do the research     

Wanless HR 《Ground water》2004,42(2):157-157

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Considerations on the magnitude distributions of the Kuiper belt and of the Jupiter Trojans     

Alessandro Morbidelli  Harold F. Levison  Luke Dones 《Icarus》2009,202(1):310-315

By examining the absolute magnitude (H) distributions (hereafter HD) of the cold and hot populations in the Kuiper belt and of the Trojans of Jupiter, we find evidence that the Trojans have been captured from the outer part of the primordial trans-neptunian planetesimal disk. We develop a sketch model of the HDs in the inner and outer parts of the disk that is consistent with the observed distributions and with the dynamical evolution scenario known as the ‘Nice model’. This leads us to predict that the HD of the hot population should have the same slope of the HD of the cold population for 6.5<H<9, both as steep as the slope of the Trojans' HD. Current data partially support this prediction, but future observations are needed to clarify this issue. Because the HD of the Trojans rolls over at H∼9 to a collisional equilibrium slope that should have been acquired when the Trojans were still embedded in the primordial trans-neptunian disk, our model implies that the same roll-over should characterize the HDs of the Kuiper belt populations, in agreement with the results of Bernstein et al. [Bernstein, G.M., and 5 colleagues, 2004. Astron. J. 128, 1364-1390] and Fuentes and Holman [Fuentes, C.I., Holman, M.J., 2008. Astron. J. 136, 83-97]. Finally, we show that the constraint on the total mass of the primordial trans-neptunian disk imposed by the Nice model implies that it is unlikely that the cold population formed beyond 35 AU.  相似文献