scholarly journals The role of clouds and oceans in global greenhouse warming

1992 ◽  
Author(s):  
M.I. Hoffert
Keyword(s):  
Greenhouse Warming

scholarly journals Methane, oxygen, photosynthesis, rubisco and the regulation of the air through time

2008 ◽  
Vol 363 (1504) ◽  
pp. 2745-2754 ◽  
Author(s):  
Euan G Nisbet ◽  
R. Ellen R Nisbet
Keyword(s):  
Greenhouse Gas ◽  
Greenhouse Warming ◽  
Biological Productivity ◽  
Stable States ◽  
Mixing Ratios ◽  
The Past ◽  
Glacial Epoch ◽  
Air Control ◽  
Carbon Gases

Rubisco I's specificity, which today may be almost perfectly tuned to the task of cultivating the global garden, controlled the balance of carbon gases and O 2 in the Precambrian ocean and hence, by equilibration, in the air. Control of CO 2 and O 2 by rubisco I, coupled with CH 4 from methanogens, has for the past 2.9 Ga directed the global greenhouse warming, which maintains liquid oceans and sustains microbial ecology. Both rubisco compensation controls and the danger of greenhouse runaway (e.g. glaciation) put limits on biological productivity. Rubisco may sustain the air in either of two permissible stable states: either an anoxic system with greenhouse warming supported by both high methane mixing ratios as well as carbon dioxide, or an oxygen-rich system in which CO 2 largely fulfils the role of managing greenhouse gas, and in which methane is necessarily only a trace greenhouse gas, as is N 2 O. Transition from the anoxic to the oxic state risks glaciation. CO 2 build-up during a global snowball may be an essential precursor to a CO 2 -dominated greenhouse with high levels of atmospheric O 2 . Photosynthetic and greenhouse-controlling competitions between marine algae, cyanobacteria, and terrestrial C3 and C4 plants may collectively set the CO 2  : O 2 ratio of the modern atmosphere (last few million years ago in a mainly glacial epoch), maximizing the productivity close to rubisco compensation and glacial limits.

scholarly journals Arctic Oscillation responses to greenhouse warming and role of synoptic eddy feedback

2010 ◽  
Vol 115 (D17) ◽  
Author(s):  
Da-Hee Choi ◽  
Jong-Seong Kug ◽  
Won-Tae Kwon ◽  
Fei-Fei Jin ◽  
Hee-Jeong Baek ◽  
...  
Keyword(s):  
Arctic Oscillation ◽  
Greenhouse Warming ◽  
Synoptic Eddy

Will the sky fall in? Global warming – an alternative view

Antiquity ◽  
2010 ◽  
Vol 84 (326) ◽  
pp. 1163-1171 ◽  
Author(s):  
Michael J. Rowland
Keyword(s):  
Global Warming ◽  
Climate Science ◽  
Government Policies ◽  
Alternative View ◽  
Greenhouse Warming ◽  
Archaeological Record ◽  
The World ◽  
Political Milieu ◽  
Key Questions

Peter Mitchell (2008) has recently suggested in this journal that the world is facing a ‘catastrophe’ due to anthropogenic climate warming. Mitchell divides his commentary into two parts, and asks two key questions: what is the role of the archaeological community and individual archaeologists in this impending catastrophe and, how will this affect our day-to-day practice? I support most points in the second part (see Rowland 2008) but offer some alternative perspectives to issues raised in the first section of Mitchell's paper. There is a multiplicity of dimensions to the debate about ‘global warming’ (also referred to as ‘enhanced greenhouse warming’, ‘human-induced climate change’ or ‘anthropogenic warming’), including the socio-political milieu, the climate science itself and resulting government policies and guidelines. Archaeologists/anthropologists have a role to play in each of these areas; in particular the longue durée of the archaeological record can provide some fresh insights, a point on which bothMitchell and I agree. Where I differ fromMitchell is that I see a need to refocus the debate toward issues of sustainability and away from the current over-emphasis on global warming.

Role of dactinomycin in the improved survival of children with Wilms' tumor

JAMA ◽  
1966 ◽  
Vol 195 (12) ◽  
pp. 1005-1009 ◽  
Author(s):  
D. J. Fernbach
Keyword(s):  
Wilms Tumor

Role of the allergist in diagnosis and management of patients with uveitis

JAMA ◽  
1966 ◽  
Vol 195 (3) ◽  
pp. 167-172 ◽  
Author(s):  
T. E. Van Metre
Keyword(s):  
Diagnosis And Management
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