Издательство Wiley по журналам "Geophysical Research Letters"
Отображаемые элементы 1-20 из 3919
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(1984-11)Air is extracted from bubbles of polar ice samples by a dry extraction method, and the 13C/12C ratio is measured on CO2 separated from the air.Ice samples of typically 700 g are crushed at ca. −20°C, the evolving air is ...
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(1984-01)Daily solar irradiance measurements in the spectral interval 120‐305 nm have been made since 6 October 1981 with an instrument on the Solar Mesosphere Explorer. The instrument operates with a spectral resolution of about ...
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(1988-08)Measurements of 222Rn, 226Ra, and 238U in formation waters derived from granitic rocks surrounding the Cajon Pass borehole indicate concentrations of about 700, 1, and 0.01 dpm/1, respectively. The radon profile in the ...
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(1996-08-15)We report the 238U‐230Th age derived from samples from three basalt flows from the Albuquerque Volcanoes Field, central New Mexico (USA), interpreted to have erupted during one of the Bruhnes Chron geomagnetic field polarity ...
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(1992-07-06)The activities of members of the 238U and 232Th decay chains have been determined in water from well J‐13 at the Nevada Test Site near Yucca Mountain. Using 222Rn as a measure of recoil flux, adsorption (k1) and desorption ...
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(1996-05-15)We analyze 2fp radio emission observed during a perigee pass in August 1995 when the WIND spacecraft was between 47 and 72 RE from Earth and upstream of the electron foreshock. The WAVES experiment on WIND measures the ...
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(1984-12)The chlorine‐36 content of three thermal waters from Valles Caldera, New Mexico has been analyzed to investigate the use of chlorine‐36 as a geothermal tracer.
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(1986-04)To improve the lateral resolution of the first global 3 ‐ dimensional models of seismic wave velocities, regional studies have to be undertaken. The dispersion of Rayleigh waves along 86 paths across the Indian Ocean and ...
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(1993-11-05)3‐dimensional (3D) proton velocity data measured by the ASPERA mass spectrometer onboard the Phobos‐2 spacecraft are presented. The mass spectrometer was capable of providing 3D plasma distribution data by scanning through ...
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(1990-11)The 40Ar−39Ar dating of the amphibole from the Beja gabbro (Southern Portugal) yields a plateau age at 336.4 ± 0.8 Ma (2σ level). The corresponding calculated isotopic closure temperature is around 800°C. The comparison ...
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(1992-09-04)The iron‐oxide mineral magnetite is widely used to study the past geomagnetic field because of its ability to record the ancient field at the time of its crystallization (or cooling), and because of its common occurrence ...
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(1995-09-01)Histograms of the 4He/³He ratios analysed in MORB glasses from individual ridge segments show a linar correlation between the ridge spreading rate and the standard deviation of the corresponding averaged 4He/³He ratio. We ...
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(1988-08)Winter time variability of heights over the Antarctic peninsula, Weddell Sea and Queen Maud Land are shown to have important contributions from correlations between the zonally averaged height field ([Z]) and longitudinally ...
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(1996-03-01)The relative abundance of 7Be and 210Pb in aerosols, represented as the “normalized fraction”, 7Be/(7Be + n210Pb), is unaffected by aerosol scavenging. This normalized fraction is an index of the relative influence on an ...
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(1995-09-01)We have carried out a high‐resolution study of fluctuations in upwelling intensity along the Oman Margin, western Arabian Sea, through the last 19,130 years based on several marine microfossil indices of upwelling. We ...
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(1990-11)A 2‐D stratospheric and mesospheric dynamical model including drag and diffusion due to gravity wave breaking is used to simulate winter mesospheric temperature inversions similar to those observed by Rayleigh lidar. It ...
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(1996-02-15)Relict plunge‐pool sedimentary sequences provide much longer paleoflood records than normally provided by slackwater deposits and other previously reported paleoflood sedimentary signatures. The only two relict plunge‐pool ...
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(1988-10)Three‐dimensional seismic modeling demonstrates that the intragraben horst‐like feature imaged on COCORP's Socorro‐Abo Pass survey in the Albuquerque Basin, New Mexico likely corresponds to the northeast‐plunging continuation ...
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(1990-12)A 400 year deuterium record has been obtained from a 154.3 m ice core drilled on Dalinger Dome (James Ross Island, Antarctic Peninsula). Based on a comparison between the isotope profile and the temperature data over the ...
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(1989-08)The split window method for retrieving sea surface temperatures (SST) from satellite‐based observations is evaluated from radiative transfer calculations, and shown to have an inherent limitation that arises from a linear ...
Отображаемые элементы 1-20 из 3919