A central issue for understanding past climates involves the use of sparse time-integrated data to recover the physical properties of the coupled climate system. We explore this issue in a simple model of the midlatitude climate system that has attributes consistent with the observed climate. A quasigeostrophic (QG) model thermally coupled to a slab ocean is used to approximate midlatitude coup...

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During my 2006-2007 VSGC fellowship I modeled the O2 atmosphere of Jupiter’s moon Europa. By assuming that atmospheric O2 can react with species contained in portions of Europa’s surface, my coauthors and I have been able to reproduce the O2 density variations seen by a previously-unexplained HST observation. This work included further refinements to a regolith model that I published previous t...

[1] Interaction between impact-induced vapor clouds and the ambient atmosphere may play an important role in planetary evolution. In the companion study, Sugita and Schultz [2003] conducted a series of impact experiments detailing observation of this interaction process. The laboratory experiments using diatomic molecular spectroscopy provide several well-defined observational constraints on th...

Phase differences and amplitude ratios at different colour photometric bands are currently being used to discriminate pulsation modes in order to facilitate mode identification of κ-driven non-radial pulsating stars. In addition to physical inputs (e.g., mass, T e f f , etc.), these quantities depend on the non-adiabatic treatment of the atmosphere. This paper presents theoretical results conce...

[1] Recent analysis of sedimentary dN records over the last 200,000 years has shown an expansion of water column denitrification zones during warmer periods and a shrinkage of these oxygen-poor regions during glacial periods. Two different mechanisms could be responsible for driving the changes in the denitrification records: variations in local productivity leading to a change in remineralizat...

Introduction. The primitive equations of the atmosphere and of the ocean have been studied, from the mathematical viewpoint, in Lions, Temam, and Wang ([6], [7]; see also [8], [9]) for the coupling of the atmosphere and the ocean. Concerning the equations of temperature, the classical methods used for the maximum principle apply to the temperature equation for the ocean but they seemingly do no...

[1] We present a physical model to calculate production of cosmogenic isotope Be in the atmosphere. The model is based on a full Monte Carlo simulation of an electromagneticmuon-nucleonic cascade in the atmosphere, using CORSIKA and FLUKA packages. The present results are in broad agreement with earlier empirical and semiempirical models but predict higher production rate than some recent theor...

The Earth climate is a complex, interactive system, determined by a number of complex connected physical, chemical and biological processes occurring in the atmosphere, land and ocean. The terrestrial biosphere plays many pivotal roles in the coupled Earth system providing both positive and negative feedbacks to climate change (Treut et al., 2007). Terrestrial vegetation via photosynthesis conv...