On the Present Halting of Global Warming

Syun-Ichi Akasofu International Arctic Research Center, University of Alaska Fairbanks, USA; E-Mail: sakasofu@iarc.uaf.edu; Tel.: 1-907-474-6012; Fax: 1-907-474-5662 Received: 28 January 2012; in revised form: 15 April 2013/ Accepted: 15 April 2013/ Published: 3 May 2013 Abstract: The rise in global average temperature over the last century has halted since roughly the year 2000, despite the fact that the release of CO2 into the atmosphere is still increasing. It is suggested here that this interruption has been caused by the suspension of the near linear (+ 0.5° C/100 years or 0.05° C/10 years) temperature increase over the last two centuries, due …

The Green New Deal: Scope, Scale, and Implications

Douglas Holtz-Eakin, Dan Bosch, Ben Gitis, Dan Goldbeck, Philip Rossetti EXECUTIVE SUMMARY The Green New Deal (GND) is a sweeping policy plan setting out ambitious objectives for energy and economic policy. The breadth of its proposals makes it daunting to assess the GND using the standard tools of policy analysis. Nevertheless, this short paper is an initial foray. We have three broad conclusions: The GND’s proposed goals, “mobilization,” and specific policy projects encompass social and institutional changes far exceeding the narrow policy goals, but these changes are impossible to quantify at this point; Many of the policies proposed in the …

The phase relations among atmospheric CO2 content, temperature and global ice volume over the past 420 ka

Quaternary Science Reviews 20 (2001) 583}589 Manfred Mudelsee Institute of Meteorology, University of Leipzig, Stephanstr. 3, D-04103 Leipzig, Germany Abstract The phase relations (leads/lags) among atmospheric CO2 content, temperature and global ice volume are key to understanding the causes of glacial-interglacial (G-IG) climate transitions. Comparing the CO2​ record with other proxy variables from the Vostok ice core and stacked marine oxygen isotope records, allows the phase relations among these variables, over the last four G-IG cycles, to be estimated. Lagged, generalized least-squares regression provides an efficient and precise technique for this estimation. Bootstrap resampling allows account to be taken of …

Climate Impact of Increasing Atmospheric Carbon Dioxide

Science 28 August 1981, Volume 213, Number 4511 J. Hansen, D. Johnson, A. Lacis, S. Lebedeff, P. Lee, D. Rind, G. Russell Summary. The global temperature rose by 0.20C between the middle 1960’s and 1980, yielding a warming of 0.4°C in the past century. This temperature increase is consistent with the calculated greenhouse effect due to measured increases of atmospheric carbon dioxide. Variations of volcanic aerosols and possibly solar luminosity appear to be primary causes of observed fluctuations about the mean trend of increasing temperature. It is shown that the anthropogenic carbon dioxide warming should emerge from the noise level …

The Relationship between Atmospheric Carbon Dioxide Concentration and Global Temperature for the Last 425 Million Years

MDPI climate W. Jackson Davis Received: 8 August 2017 / Revised: 15 September 2017 / Accepted: 22 September 2017 / Published: 29 September 2017 Abstract Assessing human impacts on climate and biodiversity requires an understanding of the relationship between the concentration of carbon dioxide (CO2) in the Earth’s atmosphere and global temperature (T). Here I explore this relationship empirically using comprehensive, recently-compiled databases of stable-isotope proxies from the Phanerozoic Eon (~540 million years before the present) and through complementary modeling using the atmospheric absorption/transmittance code MODTRAN. Atmospheric CO2 concentration is correlated weakly but negatively with linearly-detrended T proxies over the …

Of discount rates and candy-canes

“The time has come,” the Walrus said, “To talk of many things: Of shoes and ships and sealing-wax, Of cabbages and kings, And why the sea is boiling hot, And whether pigs have wings.” Lewis Carroll, Aliciae per speculum transitus WUWT By Christopher Monckton of Brenchley | January 11, 2019

CO2 is not causing (statistically relevant) global warming

Bud Bromley January 15, 2019 CO2, water, and CH4 (methane) and some other minor gases are so-called “greenhouse gases” because they absorb infrared energy.  However, be careful to avoid the common misunderstanding that the earth and its atmosphere behave like a garden greenhouse; that is not true.  Greenhouses are closed systems except to incoming energy.  Earth is an open system, open to receive energy, as well receive gases and other matter from space and also open to transmit energy, gases and matter back into space.  A greenhouse is a poor analogy for earth’s climate.

180 YEARS OF ATMOSPHERIC CO2 GAS ANALYSIS BY CHEMICAL METHODS

by Ernst-Georg Beck Reprinted from ENERGY & ENVIRONMENT VOLUME 18 No. 2 2007 ABSTRACT More than 90,000 accurate chemical analyses of CO2 in air since 1812 are summarised. The historic chemical data reveal that changes in CO2 track changes in temperature, and therefore climate in contrast to the simple, monotonically increasing CO2 trend depicted in the post-1990 literature on climate-change. Since 1812, the CO2 concentration in northern hemispheric air has fluctuated exhibiting three high level maxima around 1825, 1857 and 1942 the latter showing more than 400 ppm. Between 1857 and 1958, the Pettenkofer process was the standard analytical method …

The potency of carbon dioxide (CO2) as a greenhouse gas

By Antero Ollila September 2014 Abstract According to this study the commonly applied radiative forcing (RF) value of 3.7 Wm-2 for CO2 concentration of 560 ppm includes water feedback. The same value without water feedback is 2.16 Wm-2 which is 41.6 % smaller. Spectral analyses show that the contribution of CO2 in the greenhouse (GH) phenomenon is about 11 % and water’s strength in the present climate in comparison to CO2 is 15.2. The author has analyzed the value of the climate sensitivity (CS) and the climate sensitivity parameter () using three different calculation bases. These methods include energy balance …