Climate dynamics

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The Effect of Host Star Spectral Energy Distribution and Ice-Albedo Feedback on the Climate of Extrasolar Planets

Astrobiology Mary Ann Liebert 13:8 (2013) 715-739

Authors:

Aomawa L Shields, Victoria S Meadows, Cecilia M Bitz, Raymond T Pierrehumbert, Manoj M Joshi, Tyler D Robinson
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Report on the 3rd SPARC DynVar Workshop on Modelling the Dynamics and Variability of the Stratosphere-Troposphere System

(2013) 41

Authors:

E Manzini, A Charlton-Perez, E Gerber, T Birner, A Butler, S Hardiman, A Karpechko, F Lott, A Maycock, SM Osprey, O Tripathi, T Shaw, M Sigmond

Robust elements of Snowball Earth atmospheric circulation and oases for life

Journal of Geophysical Research: Atmospheres American Geophysical Union (AGU) 118:12 (2013) 6017-6027

Authors:

Dorian S Abbot, Aiko Voigt, Dawei Li, Guillaume Le Hir, Raymond T Pierrehumbert, Mark Branson, David Pollard, Daniel DB Koll
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Atmospheric composition, irreversible climate change, and mitigation policy.

Chapter in Climate Science for Serving Society Research, Modeling and Prediction Priorities, Springer Science & Business Media (2013) 15

Authors:

S Solomon, RT Pierrehumbert, HD matthews, JS Daniel, P Friedlingstein

Abstract:

This volume offers a comprehensive survey and a close analysis of efforts to develop actionable climate information in support of vital decisions for climate adaptation, risk management and policy.
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Revisiting the controversial issue of tropical tropospheric temperature trends

Geophysical Research Letters 40:11 (2013) 2801-2806

Authors:

DM Mitchell, PW Thorne, PA Stott, LJ Gray

Abstract:

Controversy remains over a discrepancy between modeled and observed tropical upper tropospheric temperature trends. This discrepancy is reassessed using simulations from the Coupled Climate Model Inter-comparison Project phase 5 (CMIP 5) together with radiosonde and surface observations that provide multiple realizations of possible "observed" temperatures given various methods of homogenizing the data. Over the 1979-2008 period, tropical temperature trends are not consistent with observations throughout the depth of the troposphere, and this primarily stems from a poor simulation of the surface temperature trends. This discrepancy is substantially reduced when (1) atmosphere-only simulations are examined or (2) the trends are considered as an amplification of the surface temperature trend with height. Using these approaches, it is shown that within observational uncertainty, the 5-95 percentile range of temperature trends from both coupled-ocean and atmosphere-only models are consistent with the analyzed observations at all but the upper most tropospheric level (150 hPa), and models with ultra-high horizontal resolution (≤ 0.5° × 0.5°) perform particularly well. Other than model resolution, it is hypothesized that this remaining discrepancy could be due to a poor representation of stratospheric ozone or remaining observational uncertainty. © 2013 American Geophysical Union. All Rights Reserved.
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