Climate dynamics

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Understanding stratosphere-troposphere links using new diagnostics of the polar vortex

EGU General Assembly Conference Abstracts 12 (2010) 2334-2334

Authors:

Daniel Mitchell, Lesley Gray, Andrew Charlton-Perez

Variability and Extreme Variability of the Stratospheric Polar Vortices Using 2D Moments

AGU Fall Meeting Abstracts (2010)

Authors:

DM Mitchell, L Gray, A Charlton Perez

Sensitivity of stable water isotopic values to convective parameterization schemes

Geophysical Research Letters American Geophysical Union (AGU) 36:23 (2009)

Authors:

Jung‐Eun Lee, Raymond Pierrehumbert, Abigail Swann, Benjamin R Lintner
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Global warming, convective threshold and false thermostats

Geophysical Research Letters American Geophysical Union (AGU) 36:21 (2009)

Authors:

Ian N Williams, Raymond T Pierrehumbert, Matthew Huber
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The atmospheric charged kaon/pion ratio using seasonal variation methods

ArXiv 0909.5382 (2009)

Authors:

EW Grashorn, JK de Jong, MC Goodman, A Habig, ML Marshak, S Mufson, S Osprey, P Schreiner

Abstract:

Observed since the 1950's, the seasonal effect on underground muons is a well studied phenomenon. The interaction height of incident cosmic rays changes as the temperature of the atmosphere changes, which affects the production height of mesons (mostly pions and kaons). The decay of these mesons produces muons that can be detected underground. The production of muons is dominated by pion decay, and previous work did not include the effect of kaons. In this work, the methods of Barrett and MACRO are extended to include the effect of kaons. These efforts give rise to a new method to measure the atmospheric K/$\pi$ ratio at energies beyond the reach of current fixed target experiments. These methods were applied to data from the MINOS far detector. A method is developed for making these measurements at other underground detectors, including OPERA, Super-K, IceCube, Baksan and the MINOS near detector.
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