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Amplified North Atlantic warming in the late Pliocene by changes in Arctic gateways
Under previous reconstructions of late Pliocene boundary conditions, climate models have failed to reproduce the warm sea surface temperatures reconstructed in the North...- publication PDF
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Sources of error in dual-wavelength radar remote sensing of cloud liquid...
Dual-wavelength ratio (DWR) techniques offer the prospect of producing high-resolution mapping of cloud microphysical properties, including retrievals of cloud liquid water...- publication PDF
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Atmospheric wake of Madeira: First aerial observations and numerical simulations
The island of Madeira is well known for giving rise to atmospheric wakes. Strong and unsteady atmospheric wakes, resembling a von Kármán vortex street, are frequently observed...- publication PDF
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Secondary planetary waves in the middle and upper atmosphere following the...
The role of planetary waves in causing stratospheric sudden warmings (SSWs) is well understood and quantified. However, recent studies have indicated that secondary planetary...- publication PDF
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Simulating precipitation efficiency across the deep convective gray zone
Precipitation efficiency (PE) relates cloud condensation to precipitation and thus reflects how much of the total atmospheric condensate reaches the surface as precipitation....- publication PDF
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The three-cornered hat method for estimating error variances of three or...
The three-cornered hat (3CH) method, which was originally developed to assess the random errors of atomic clocks, is a means for estimating the error variances of three...- publication PDF
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Efficient in-cloud removal of aerosols by deep convection
Convective systems dominate the vertical transport of aerosols and trace gases. The most recent in situ aerosol measurements presented here show that the concentrations of...- publication PDF
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Internal Gravity and Acoustic Waves - a Colloquium
Between 17 June and 26 July 1968 the Advance Study Program at NCAR and the Astro-Geophysics Department of the University of Colorado conducted a six-week colloquium on the...- publication PDF
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Feedback of tropical instability wave induced atmospheric variability onto the ocean
The effects of atmospheric feedbacks on tropical instability waves (TIWs) in the equatorial Atlantic Ocean are examined using a regional high-resolution coupled climate model....- publication PDF
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GPS profiling of the lower troposphere from space: Inversion and...
Global Positioning System (GPS) radio occultation (RO) is a space-borne remote sensing technique providing accurate, all-weather, high vertical resolution atmospheric...- publication PDF
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Assessing Responses and Impacts of Solar Climate Intervention on the Earth...
Solar climate intervention using stratospheric aerosol injection is a proposed method of reducing global mean temperatures to reduce the worst consequences of climate change. A...- publication PDF
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Assimilation of radar reflectivity via a full-hydrometeor assimilation...
The microphysical parameterization scheme employed in four-dimensional variational data assimilation (4DVar) plays an important role in the assimilation of humidity and cloud-...- publication PDF
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Demonstration of a diode-laser-based high spectral resolution lidar (HSRL)...
We present a demonstration of a diode-laser-based high spectral resolution lidar. It is capable of performing calibrated retrievals of aerosol and cloud optical properties at a...- publication PDF
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The origin of the "seasons" in space weather
Powerful 'space weather' events caused by solar activity pose serious risks to human health, safety, economic activity and national security. Spikes in deaths due to heart...- publication PDF
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Theoretical expressions for the ascent rate of moist deep convective thermals
An approximate analytic expression is derived for the ratio lambda of the ascent rate of moist deep convective thermals and the maximum vertical velocity within them; lambda is...- publication PDF
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Initial validation of ozone measurements from the High Resolution Dynamics...
Comparisons of the latest High Resolution Dynamics Limb Sounder (HIRDLS) ozone retrievals (v2.04.09) are made with ozonesondes, ground-based lidars, airborne lidar measurements...- publication PDF
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Airborne flux measurements of BVOCs above Californian oak forests:...
Airborne flux measurements of isoprene were performed over the Californian oak belts surrounding the Central Valley. The authors demonstrate for the first time 1) the...- publication PDF
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Vertical variations in the Nâ mass mixing ratio during a thermospheric...
The Center for Integrated Space Weather Modeling's (CISM) suite of models was run together to simulate the passage of an idealized coronal mass ejection (CME) from the Sun's...- publication PDF
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The North American Multimodel Ensemble: Phase-1 seasonal-to-interannual...
The recent U.S. National Academies report, Assessment of Intraseasonal to Interannual Climate Prediction and Predictability, was unequivocal in recommending the need for the...- publication PDF
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Limb Darkening and Rotation Broadening of Neutral Helium and Ionized...
The primary purpose of this paper is to describe an efficient method of computing rotation-broadening effects allowing for the full limb-distance variation of both the continuum...- publication PDF