Global Climate Facts• The “Greenhouse Effect” (interaction of sunshine, atmosphere and surface) is

responsible for a habitable climate on Earth– Average temperature of deep space (distant from any sun) is:

-520 F– Average temperature on earth is:

+57 F– Max Temp. range of objects in near-earth orbit (above the

atmosphere) is: +500 F to -150 F (in direct sun or in earth’s shadow) 650 F range

– Record seasonal range of earth’s surface (summer to winter in Siberia) is: +98 F to -90 F 188 F range

– Record daily range of earth’s surface (Montana) is:+44 F to -56 F 100 F range

Comparison of Temperature Ranges 1 week in April in Montrose, CO

45 F actual temp range (1 week)

Global Climate Facts• The “Greenhouse Effect”

From: National Center for Atmospheric Research, Boulderhttp://www.ucar.edu/learn/1_3_1.htm

30% of sun’s energyIs reflected back into space.

19% is absorbed by theatmosphere

51% is absorbed by theearth.

Global Climate Facts• The “Greenhouse Effect”

– Man made emissions of total CO2 into the atmosphere are increasing

Estimated Total Carbon Dioxide emitted by human activity

Global Climate Facts• The “Greenhouse Effect”

– Water vapor dwarfs all other greenhouse gases• As much as 95% of the greenhouse effect on earth is due to water vapor and

clouds.• As little as 3.6% of greenhouse effect is due to CO2

From: http://www.geocraft.com/WVFossils/greenhouse_data.html

Global Climate Facts• The “Greenhouse Effect”

– Man-made gases account for as little as 1/3 % of the greenhouse effect.

From: http://www.geocraft.com/WVFossils/greenhouse_data.html

Global Climate Facts

From: http://en.wikipedia.org/wiki/Sunlight

Global Climate Facts

http://homepages.ius.edu/kforinas/ClassRefs/Climate/greenhouseeffect.htm

Surface Temperature Records Trend for about the last 150 years shows an overall warming trend

From: http://www.seed.slb.com/en/scictr/watch/climate_change/change.htm

Surface Temperature Records Trend for about the last 150 years shows an overall warming trend

From: http://www.seed.slb.com/en/scictr/watch/climate_change/change.htm

Surface Temperature Records Compared at the same scales

Proxy data about the last 450,000 years shows warm and cold trends about evenly spaced

From: http://www.seed.slb.com/en/scictr/watch/climate_change/change.htm

150

200

250

300

350

400

Surface Temperature Records Compared to CO2 and Airborne Dust ConcentrationData over the last 450,000 years shows temperature positively correlated to C02

(CO2 increases lag temperature increases by about 300-400 years, not so with dust)

0100000200000300000400000500000600000700000800000-450

-440

-430

-420

-410

-400

-390

-380

-370

-360

-350

0

-5 F

-10 F

-15 F

+5 F

+10 F

1.6

16

160

1600

CO2

Temp.

Dust

Surface Temperature Records Compared to atmospheric dust-concentrationsDetailed study of the last 23,000 years shows temperature tracking dust concentration

(1-5 micron size range)

Cool

ing

From: Albani, S. “Interpreting last glacial to Holocene dust changes at Talos Dome (East Antarctica): implications for atmospheric variations from regional to hemispheric scales” (2012)

Older

Atmospheric Chemistry and Biology Through Time

Origin of Photosynthetic

Cellular Activity First Metabolic

Cells (Prokaryotes)

Multicellular Oganisms

First Land Plants

Fluctuations of pCO2 for the last 500 My, normalized by the estimate of pCO2 obtained from the most recent value of ζ.

Rothman D H PNAS 2002;99:4167-4171

©2002 by National Academy of Sciences

Presentday

Grasses evolve

-5

0

+20

+10

+5

+15

Productivity vs. Preservation-Potential

Biologic Productivity

high

er

high

er

Preservation Potential

Native Environments Over Time

Native Environments Over Time

Native Environments Over Time

Native Environments Over Time

Native Environments Over Time

Native Environments Over Time

Native Environments Over Time

Native Environments Over Time

Native Environments Over Time

Native Environments Over Time

Native Environments Over Time

Native Environments Over Time

Native Environments Over Time

Native Environments Over Time

Native Environments Over Time

Native Environments Over Time

Native Environments Over Time

Native Environments Over Time

Native Environments Over Time

Native Environments Over Time

Native Environments Over Time

Native Environments Over Time

U. S. Climate Reference Network114 state-of-the-art ultra-reliable triple redundant weather stations placed on pristine environments

Now operational for almost 10 years

U. S. Climate Reference Network114 state-of-the-art ultra-reliable triple redundant weather stations placed on pristine environments

http://www.ncdc.noaa.gov/temp-and-precip/national-temperature-index/time-series

Average TemperatureContiguous U.S. over 100 years

6/1/1

911

12/1/1

913

6/1/1

916

12/1/1

918

6/1/1

921

12/1/1

923

6/1/1

926

12/1/1

928

6/1/1

931

12/1/1

933

6/1/1

936

12/1/1

938

6/1/1

941

12/1/1

943

6/1/1

946

12/1/1

948

6/1/1

951

12/1/1

953

6/1/1

956

12/1/1

958

6/1/1

961

12/1/1

963

6/1/1

966

12/1/1

968

6/1/1

971

12/1/1

973

6/1/1

976

12/1/1

978

6/1/1

981

12/1/1

983

6/1/1

986

12/1/1

988

6/1/1

991

12/1/1

993

6/1/1

996

12/1/1

998

6/1/2

001

12/1/2

003

6/1/2

006

12/1/2

008

6/1/2

01151

51.5

52

52.5

53

53.5

54

http://www.ncdc.noaa.gov/cag/time-series/us

Aver

age

tem

pera

ture

(deg

rees

F)

0.5 F / 100 years

1.5 F / 100 years

IPCC Climate Assessments

From: IPCC Fifth Climate Assessment Report, 2013

IPCC Climate Assessments

From: IPCC Fifth Climate Assessment Report, 2013

U.S Data 1911-2011

Multi-decadal Oscillation

Multi-decadal Oscillation

U.S Data 1911-2011

“Cloud feedback. This is still an unresolved issue. The few results we have on the role of cloud feedback in climate change is mostly from GCMs.Their treatment of clouds is so rudimentary that we need an observational basis tocheck the model conclusions. We do not know how the net forcing of −18 W m−2**will change in response to global warming.

Thus, the magnitude as well as the sign of the cloud feedback is uncertain..”

The radiative forcing due to clouds and water vapor (2006)V. Ramanathan and Anand Inamdar

Center for Atmospheric Sciences, Scripps Institution of Oceanography, University of California, San Diego, CA

** This study indicates water vapor has a positive forcing of +30 W/m2 (absorption=warming)and a negative forcing of -48 W/m2 (reflection/scattering =net cooling effect)

IPCC reports a CO2 forcing value of 1.66 W/m2 (absorption=warming only).This study suggests that C02 is only 5.5 % as effective as water vapor in absorbing heat into the atmosphere.

“…With a straightforward scheme for allocating overlaps, we find that watervapor is the dominant contributor ( 50% of the effect), followed by clouds ( 25%)∼ ∼and then CO2 with 20%. All other absorbers play only minor roles. ∼

In a doubled CO2 scenario, this allocation is essentially unchanged, even though the magnitude of the total greenhouse effect is significantly larger than the initial radiative forcing, underscoring the importance of feedbacks from water vapor and clouds to climate sensitivity..”

Attribution of the present day total greenhouse effect (2010)‐Gavin A. Schmidt et al.

NASA Goddard Institute for Space Studies, New York, New York, USA.

Cloud-Aerosol Interactions:“…The quantification of cloud and convective effects in models, and of aerosol–cloud interactions, continues to be a challenge. Climate models are incorporating more of the relevant processes than at the time of AR4 (2009), but confidence in the representation of these processes remains weak. …Cloud and aerosol properties vary at scales significantly smaller than those resolved in climate models, ….Until sub-grid scale parameterizations of clouds and aerosol–cloud interactions are able to address these issues, model estimates of aerosol–cloud interactions and their radiative effects will carry large uncertainties…. ”

From IPCC AR5 Physical Science Basis Report (2013)

Water Vapor and Clouds:“Many of the cloudiness and humidity changes simulated by climate models in warmer climates are now understood as responses to large-scale circulation changes …. However, some aspects of the overall cloud response vary substantially among models, and these appear to depend strongly on sub-grid scale processes in which there is less confidence.”

Scientists questioning the accuracy of IPCC climate projectionsScientists in this section have made comments that it is not possible to project global climate accurately enough to justify the ranges projected for temperature and sea-level rise over the next century. They may not conclude specifically that the current IPCC projections are either too high or too low, but that the projections are likely to be inaccurate due to inadequacies of current global climate modeling.Freeman Dyson, professor emeritus of the School of Natural Sciences, Institute for Advanced Study; Fellow of the Royal Society [16]

Richard Lindzen, Alfred P. Sloan emeritus professor of atmospheric science at the Massachusetts Institute of Technology and member of the National Academy of Sciences[17][18][19]

Nils-Axel Mörner, retired head of the Paleogeophysics and Geodynamics department at Stockholm University, former chairman of the INQUA Commission on Sea Level Changes and Coastal Evolution (1999–2003)[20]

Garth Paltridge, retired chief research scientist, CSIRO Division of Atmospheric Research and retired director of the Institute of the Antarctic Cooperative Research Centre, visiting fellow Australian National University[21]

Peter Stilbs, professor of physical chemistry at Royal Institute of Technology, Stockholm[22]

Philip Stott, professor emeritus of biogeography at the University of London[23]

Hendrik Tennekes, retired director of research, Royal Netherlands Meteorological Institute [24]

Fritz Vahrenholt, German politician and energy executive with a doctorate in chemistry[25]

Scientists arguing that global warming is primarily caused by natural processesScientists in this section have made comments that the observed warming is more likely attributable to natural causes than to human activities. Their views on climate change are usually described in more detail in their biographical articles.Khabibullo Abdusamatov, astrophysicist at Pulkovo Observatory of the Russian Academy of Sciences[27]

Sallie Baliunas, astrophysicist, Harvard-Smithsonian Center for Astrophysics[28][29]

Tim Ball, professor emeritus of geography at the University of Winnipeg[30]

Robert M. Carter, former head of the school of earth sciences at James Cook University[31]

Ian Clark, hydrogeologist, professor, Department of Earth Sciences, University of Ottawa[32]

Chris de Freitas, associate professor, School of Geography, Geology and Environmental Science, University of Auckland[33]

David Douglass, solid-state physicist, professor, Department of Physics and Astronomy, University of Rochester[34]

Don Easterbrook, emeritus professor of geology, Western Washington University[35]

William M. Gray, professor emeritus and head of the Tropical Meteorology Project, Department of Atmospheric Science, Colorado State University[36]

William Happer, physicist specializing in optics and spectroscopy, Princeton University[37]

Ole Humlum, professor of geology at the University of Oslo[38]

Wibjörn Karlén, professor emeritus of geography and geology at the University of Stockholm.[39]

William Kininmonth, meteorologist, former Australian delegate to World Meteorological Organization Commission for Climatology [40]

David Legates, associate professor of geography and director of the Center for Climatic Research, University of Delaware [41]

Anthony Lupo, professor of atmospheric science at the University of Missouri[42]

Tad Murty, oceanographer; adjunct professor, Departments of Civil Engineering and Earth Sciences, University of Ottawa[43]

Tim Patterson, paleoclimatologist and professor of geology at Carleton University in Canada.[44][45]

Ian Plimer, professor emeritus of Mining Geology, the University of Adelaide. [46]

Arthur B. Robinson, American politician, biochemist and former faculty member at the University of California, San Diego[47]

Murry Salby, atmospheric scientist, former professor at Macquarie University[48]

Nicola Scafetta, research scientist in the physics department at Duke University[49][50]

Tom Segalstad, geologist; associate professor at University of Oslo[51]

Fred Singer, professor emeritus of environmental sciences at the University of Virginia[52][53][54]

Willie Soon, astrophysicist, Harvard-Smithsonian Center for Astrophysics[55]

Roy Spencer, meteorologist; principal research scientist, University of Alabama in Huntsville[56]

Henrik Svensmark, physicist, Danish National Space Center[57]

George H. Taylor, retired director of the Oregon Climate Service at Oregon State University[58]

Jan Veizer, environmental geochemist, professor emeritus from University of Ottawa[59]

Scientists arguing that the cause of global warming is unknownScientists in this section have made comments that no principal cause can be ascribed to the observed rising temperatures, whether man-made or natural. Their views on climate change are usually described in more detail in their biographical articles.Syun-Ichi Akasofu, retired professor of geophysics and founding director of the International Arctic Research Center of the University of Alaska Fairbanks.[60]

Claude Allègre, French politician; geochemist, emeritus professor at Institute of Geophysics (Paris). [61]

Robert Balling, a professor of geography at Arizona State University.[62]

John Christy, professor of atmospheric science and director of the Earth System Science Center at the University of Alabama in Huntsville, contributor to several IPCC reports.[63][64]

Petr Chylek, space and remote sensing sciences researcher, Los Alamos National Laboratory.[65]

David Deming, geology professor at the University of Oklahoma.[66]

Ivar Giaever, professor emeritus of physics at the Rensselaer Polytechnic Institute.[67]

Vincent R. Gray, New Zealander physical chemist with expertise in coal ashes[68]

Keith Idso, botanist, former adjunct professor of biology at Maricopa County Community College District and the vice president of the Center for the Study of Carbon Dioxide and Global Change[69]

Antonino Zichichi, emeritus professor of nuclear physics at the University of Bologna and president of the World Federation of Scientists.[70]

Scientists arguing that global warming will have few negative consequencesScientists in this section have made comments that projected rising temperatures will be of little impact or a net positive for human society and/or the Earth's environment. Their views on climate change are usually described in more detail in their biographical articles.Craig D. Idso, faculty researcher, Office of Climatology, Arizona State University and founder of the Center for the Study of Carbon Dioxide and Global Change [71]

Sherwood Idso, former research physicist, USDA Water Conservation Laboratory, and adjunct professor, Arizona State University[72]

Patrick Michaels, senior fellow at the Cato Institute and retired research professor of environmental science at the University of Virginia[73]