Search Results - "Merrill, R. T"

Evolution of the geomagnetic reversal rate since 160 Ma: Is the process continuous? by McFadden, P. L., Merrill, R. T.

“…Two main interpretations have been advanced for the evolution of the geomagnetic reversal rate λ since about 160 Ma. These interpretations have quite different…”
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Do virtual geomagnetic poles follow preferred paths during geomagnetic reversals? by McFadden, P. L, Barton, C. E, Merrill, R. T

“…Much controversy has surrounded the assertion that during reversals of the Earth's magnetic field, the virtual geomagnetic poles (VMPs) show a preference for…”
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Single-domain critical sizes for coercivity and remanence by Newell, Andrew J., Merrill, Ronald T.

“…It is usually assumed that magnetic parameters such as coercivity and saturation remanence are single‐domain (SD) over the same size range. In reality, there…”
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Paleomagnetism and the Nature of the Geodynamo by Merrill, R. T., McFadden, P. L.

“…Records of direct observations of the earth's magnetic field cover less than a ten-millionth of the known lifetime of the field. Thus our knowledge of several…”
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The Character of the Field During Geomagnetic Reversals by Bogue, S W, Merrill, R T

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The geomagnetic axial dipole field assumption by Merrill, Ronald T, McFadden, Phillip L

“…The time-average geomagnetic field is commonly assumed to be a geocentric axial dipole field (GAD). This assumption is crucial to many subfields of…”
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The two states of paleomagnetic field intensities for the past 320 million years by Heller, Rainer, Merrill, Ronald T., McFadden, Phillip L.

“…Virtual dipole moments (VDM) from the past 320 million years show bimodal distributions when averaged over time intervals of several tens of millions of years…”
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Nucleation and stability of ferromagnetic states by Newell, Andrew J., Merrill, Ronald T.

“…Each ferromagnetic state, such as the single‐domain (SD) state, has critical fields and grain sizes at which it becomes unstable. To determine the properties…”
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GUFMEX: A Study of Return Flow in the Gulf of Mexico by Lewis, J. M., Hayden, C. M., Merrill, R. T., Schneider, J. M.

“…During February and March 1988, a limited field experiment was conducted over the Gulf of Mexico to gather data on two phenomena: air mass modification over…”
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Size dependence of hysteresis properties of small pseudo-single-domain grains by Newell, Andrew J., Merrill, Ronald T.

“…The Day plot (Mrs/Ms versus Hcr/Hc) is widely used by paleomagnetists to estimate the size of ferromagnetic grains and classify them as single‐domain (SD),…”
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Asymmetry in the reversal rate before and after the Cretaceous Normal Polarity Superchron by McFadden, P.L., Merrill, R.T.

“…The geomagnetic reversal chronology shows a decreasing reversal rate, λ, from about 160 Ma to about 118 Ma, a cessation in the reversal process (the Cretaceous…”
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Synoptic Analysis of the GUFMEX Return-Flow Event of 10–12 March 1988 by Merrill, Robert T.

“…Return flow is the moist southerly wind that develops over the Gulf of Mexico after an outbreak of polar air. Surface, aircraft, and special rawinsonde data…”
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Fundamental transitions in the geodynamo as suggested by paleomagnetic data by McFadden, P.L., Merrill, R.T.

“…Analysis of the reversal chronology shows that the reversal process effectively ceases during the Cretaceous Superchron. The geodynamo appears to have two…”
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Sawtooth paleointensity and reversals of the geomagnetic field by McFadden, P.L., Merrill, R.T.

“…Valet and Meynadier (Valet, J.P., Meynadier, L., 1993) noted an intriguing sawtooth intensity pattern in sequences drilled during Leg 138 of the Ocean Drilling…”
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Simulations of Physical Retrieval of Tropical Cyclone Thermal Structure Using 55-GHz Band Passive Microwave Observations from Polar-Orbiting Satellites by Merrill, Robert T.

“…A method for estimating the horizontal structure of the upper-tropospheric warm anomaly of tropical cyclones from 55-GHz microwave observations is presented…”
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The Cyclone Game: Simulation of a Tropical-Cyclone Warning Center by Holland, Greg J., Berzins, I. A., Merrill, Robert T.

“…A brief description is given of the Cyclone Game, a direct simulation of many of the operational aspects of the Perth Tropical Cyclone Warning Centre. The…”
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Use and abuse of intensity data by Merrill, Ronald T

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Non-linear processes in the geodynamo: palaeomagnetic evidence by McFadden, P. L., Merrill, R. T., McElhinny, M. W.

“…Palaeomagnetic data relating to secular variation, westward drift, non-dipole field scatter, field intensities and polarity transitions are considered together…”
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A Report on the Recent Demonstration of NOAA's Upgraded Capability to Derive Cloud Motion Satellite Winds by Merrill, Robert T., Menzel, W. Paul, Baker, Wayman, Lynch, James, Legg, Eugene

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The origin of rotational remanent magnetization by Smith, Guy, Merrill, R. T.

“…Rotational remanent magnetization, RRM, is the magnetization acquired when a sample is rotated during alternating field demagnetization. Although the existence…”
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