Browsing FAS Scholarly Articles by FAS Department "Earth and Planetary Sciences"
Now showing items 1-20 of 512
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The 1-by-3 Tandem Differential Mobility Analyzer for Measurement of the Irreversibility of the Hygroscopic Growth Factor
(Taylor & Francis Ltd, 2009)A new instrument, namely the 1 × 3 tandem differential mobility analyzer (1 × 3-TDMA), has been developed. Its primary measurement is the irreversibility of the hygroscopic growth factor of aerosol particles. The instrument ... -
3D modelling of the climatic impact of outflow channel formation events on early Mars
(Elsevier BV, 2017)Mars was characterized by cataclysmic groundwater-sourced surface flooding that formed large outflow channels and that may have altered the climate for extensive periods during the Hesperian era. In particular, it has been ... -
Abrupt Climate Shifts in Greenland Due to Displacements of the Sea Ice Edge
(American Geophysical Union, 2005)An atmospheric circulation model is used to show that a reduction in sea ice extent in the North Atlantic produces a climatic response consistent with abrupt changes in temperature and snow accumulation recorded in Greenland ... -
Absence of Extraterrestrial 3He in Permian–Triassic Age Sedimentary Rocks
(Elsevier Science BV, 2005)Helium concentration and isotopic composition were measured in a suite of samples across the Permian–Triassic boundary at Opal Creek, Canada, to determine whether high extraterrestrial helium concentrations are associated ... -
Adakitic Dacites Formed by Intracrustal Crystal Fractionation of Water-Rich Parent Magmas at Nevado de Longav Volcano (36.2 Degrees S; Andean Southern Volcanic Zone, Central Chile)
(Oxford University Press, 2007)The mid-Holocene eruptive products of Nevado de Longav volcano (362S, Chile) are the only reported occurrence of adakitic volcanic rocks in the Quaternary Andean Southern Volcanic Zone (3346S). Dacites of this volcano are ... -
Adaptation of US maize to temperature variations
(Nature Publishing Group, 2013)High temperatures are associated with reduced crop yields1, 2, and predictions for future warming3 have raised concerns regarding future productivity and food security4, 5, 6, 7, 8. However, the extent to which adaptation ... -
Agglutinated tests in post-Sturtian cap carbonates of Namibia and Mongolia
(Elsevier BV, 2011)Paleomagnetic data suggest that the early Cryogenian (Sturtian) glaciation extended to sea level at low latitude. The impact of this dramatic environmental change on biota, and the composition of ecosystems in the immediate ... -
Air-Sea Exchange in the Global Mercury Cycle
(American Geophysical Union, 2007)We present results from a new global atmospheric mercury model coupled with a mixed layer slab ocean. The ocean model describes the interactions of the mixed layer with the atmosphere and deep ocean, as well as conversion ... -
ALD of Tin Monosulfide, SnS
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Algorithms for the Calculation of Exact Displacements, Strains, and Stresses for Triangular Dislocation Elements in a Uniform Elastic Half Space
(Elsevier, 2007)We present algorithms for analytically calculating the displacements, strains, and stresses associated with slip on a triangular dislocation element (TDE) in a homogeneous elastic half space. Following previous efforts, ... -
Anaerobic Methane Oxidation in Metalliferous Hydrothermal Sediments: Influence on Carbon Flux and Decoupling from Sulfate Reduction
(Wiley-Blackwell, 2012)The anaerobic oxidation of methane (AOM) is a globally significant sink that regulates methane flux from sediments into the oceans and atmosphere. Here we examine mesophilic to thermophilic AOM in hydrothermal sediments ... -
Analysis of Atmospheric Energy Transport in ERA40 and Implications for Simple Models of the Mean Tropical Circulation
(American Meterological Society, 2008)An analysis of atmospheric energy transport in 22 years (1980-2001) of the 40-yr ECMWF Re-Analysis (ERA-40) is presented. In the analyzed budgets, there is a large cancellation between divergences of dry static and latent ... -
Ancient Aqueous Environments at Endeavour Crater, Mars
(American Association for the Advancement of Science (AAAS), 2014)Opportunity has investigated in detail rocks on the rim of the Noachian age Endeavour crater, where orbital spectral reflectance signatures indicate the presence of Fe+3-rich smectites. The signatures are associated with ... -
Andean Growth and the Deceleration of South American Subduction: Time Evolution of a Coupled Orogen-subduction System
(Elsevier, 2008)Present-day orography at the Andean margin is a result of isostasy, tectonic accretion, and erosional processes. The resulting excess mass of the Andes gives rise to frictional stresses on the seismogenic plate interface ... -
Animals in a Bacterial World, A New Imperative for the Life Sciences
(Proceedings of the National Academy of Sciences, 2013)In the last two decades, the widespread application of genetic and genomic approaches has revealed a bacterial world astonishing in its ubiquity and diversity. This review examines how a growing knowledge of the vast range ... -
Antarctic Temperature at Orbital Timescales Controlled by Local Summer Duration
(Nature Publishing Group, 2008)During the late Pleistocene epoch, proxies for Southern Hemisphere climate from the Antarctic ice cores vary nearly in phase with Northern Hemisphere insolation intensity at the precession and obliquity timescales. This ... -
Antarctica's Orbital Beat
(American Association for the Advancement of Science (AAAS), 2009)Alternating glacial and interglacial conditions have dominated Earth's climate for at least the past 800,000 years (1, 2). Such a global rhythm of glaciation is surprising—at least if summer solar radiation controls ... -
Aqueous-Phase Reactive Uptake of Dicarbonyls as a Source of Organic Aerosol Over Eastern North America
(Elsevier, 2009)We use a global 3-D atmospheric chemistry model (GEOS-Chem) to simulate surface and aircraft measurements of organic carbon (OC) aerosol over eastern North America during summer 2004 (ICARTT aircraft campaign), with the ... -
Are the 41kyr Glacial Oscillations a Linear Response to Milankovitch Forcing?
(Elsevier, 2004)The characteristics of glacial oscillations changed drastically ~0.8Ma ago, at the ‘‘mid-Pleistocene transition’’. During the past 0.8Ma the ~100 kyr glacial–interglacial oscillations were strongly asymmetric (i.e., long ... -
Assimilation of the Plutonic Roots of the Andean Arc Controls Variations in U-series Disequilibria at Volcan Llaima, Chile
(Elsevier, 2011)U-series disequilibria provide important constraints on the processes and time scales of melt production, differentiation, and transport in subduction settings. Such constraints, which are essential for understanding the ...