Presentation on theme: "TOPIC: Anthropogenic Global Warming: You and Your Progeny BY:Gary Przyborski DATE:2010-08-29 Temp Trends base (1951-1980) to (1980-2009),"— Presentation transcript:
TOPIC: Anthropogenic Global Warming: You and Your Progeny BY:Gary Przyborski DATE: Temp Trends base ( ) to ( ),
Global Warming: Climate, Weather & the such Climate versus Weather: – Weather varies locally, globally, daily, seasonally, yearly – Climate is NOT linear! It's chaotic with wind and water currents! Scientist use varied sources: satellites, temperature stations at sea and on land, tree rings, ice cores, pond sediment with varying accuracies. Earth has been hot and cold before: Earth has been hot before (ice free poles) and frozen over. Yet many indicators point to current warming trends as man-made. Upper hemisphere warms twice as fast: Climate models have predicted this.This is due to larger oceans that absorb heat faster, the ocean conveyor belt system, ozone hole, etc..
Visualize Global Warming Several Quicktime movies are available to help visualize the changes. Be patient as these files are large and require good bandwidth. The key point is that warming is not uniform throughout the globe, depending on many variables under this page for example, click on
Atmosphere is chaotic... Ref:
Great Ocean Conveyor Belt (Heat Pump) Diagram: IPCC, Ref: Transports warm tropical heat to the northern latitudes, moderating winter temps. Melt ice & increased northern rainfall can slow, or with a large release, halt this flow.
Modern Day Canaries... Glaciers: - Glaciers are loosing mass everywhere. - Many people rely on them for runoff water. - By 2030, no glaciers in Glacier National Park. - Latest research shows that sea level rise could be 1m by 2100, versus 18-58mm. Greenland - Rate of Ice volume change (04/02-06/07): All Greenland: UPDATED : – 350 km3/yr (-84 mil3/yr) – was 58 mil3/yr (2007) - Aug 3, 2010: Part of the Petermann Glacier broke off, ~100 square miles area. - If all of Greenland melted, sea level would rise 5m (18ft). Ref:
Antarctica: Another Tipping Point? Antarctica melting is largely due to warming ocean water. Since 2002, Antarctica has lost lost more than 100 cubic kilometers (24 cubic miles) of ice each year ref:
Global Warming: CO2 Lags Temperature Ref: Carbon dioxide over geological time has not been a forcer of climate change, but has affected Earth's temperature.
Global Warming: 400,000 years of temperature and CO2
VENUS465 C (870 F) EARTH14 C (57F) Image:Copyright NASA EARTH- JUST RIGHT! Ref:
Sun's Variance is Not Causing Recent Warming Orbital: Milankovitch Cycles... – - orbital eccentricity, 100,000 yr cycle, to – - axial tilt (obliquity). 41,000 yr cycle, varies 22.1º to 24.5º (23.44º) – - axial precession. 26,000 yr cycle – - ref: Sun Irradiance: - Getting brighter over a long period of time: 25-30% compared to billions yrs ago - Variation about 0.07%/11yr period, calculated to change temp 0.2K - Other variations- little ice age? Ref:
CO2 Forensics: Human Civilization Dr. Charles David Keeling links fossil fuel to CO2 rise. Ref: 02/10: CO2 has not exceeded 290 ppm in last 650,000 years. Max levels 55 million years ago: 1000
Anthropogenic Global Warming: Predicted in 1975 (35 years ago) by Broecker Ref: 35 th Birthday of GW: Broecker assumed a 3% growth of fossil fuel emissions, predicting 1.67 trillion tons by June 2010; the actual amount is thought to be about 1.3 trillion tons. This is amazing since Broecker didn't have the data in the most recent data. By the late 1980s this trend was noticed and became common in 1980s.
1. More about CO2: 2. Table Source: CDIAC 12/09: Greenhouse Gas: Concentration & Lifetimes are Important Water vapor is the most potent greenhouse gas but because of its short lifetime in the atmosphere, it is not the driving force, see ref 1 for more detail. There are other less significant gases that have been left off this table, see ref 2.
Global Warming is an Energy Imbalance The energy flux of the sun as defined as black body radiation is... Eflux (W/m 2 ) = ε x σ x T 4 (Ke) = 1 x 5.67 x (W/m 2 /K 4 ) x (K 4 ) = x 10 6 (W/m 2 ) (~6 MW/ft2) – Sun's surface area is a sphere, 4πRs 2 – Rs = x 10 8 (m) (432,164 miles, x 109 of earth) – Rse = x (m) – Using the inverse law of the sun's sphere & Earth's orbit... – 4 π Rs 2 / 4 π Rse 2 = x – Thus, the maximum flux received on the earth (disk) is... – EFfall = x 10 6 x x = 1370 W/m 2 – EFfallavg = 1370 / 4 = 342 W/m 2 insolation disk:sphere... – Next, factor inEarth's albedo 30%, absorbs 70% of the energy – EFeabs = EFfallavg x (1 – 0.3): EFeabs = 240 W/m 2 – Using above equation T = (240/ 0.95 / 5.67 x ) 1/4 – T = 255K (-18ºC, 0ºF ) if Earth was a black body but it's actually 33ºC higher, 288K (15ºC, 59ºF) from GGs. – Due to man-made affects, more of the sun's energy is trapped in the atmosphere instead of back into space. –
Global Warming: Greenhouse Gas Problem Ref: 10/06/09 Our sun's light spectrum is shown in red, while the earth's is shown in blue. Very little of the sun's energy (<5%) is in the infrared, absorbed by greenhouse gases near the earth's surface.
Urban Heat Island Effect (UHIE): Dark Objects Radiate More Heat
The War on Global Warming Science Misinformation deludes the public as to the facts and threats serving short term vested interests (coal, oil, gas, political organizations, news corporations). Business - Put lipstick on a pig: “clean coal”, “America's new natural gas” with an attractive woman. - Stress environmental issues of no consequence: not so many oil platforms... - Cost is too much. Business as usual. Compared to what? A hostile future environment? - Hold onto a broken system. Trillions were committed to subsidize failed banks. Direct attacks - Repeat disparaging catch phrases: alarmists, scam, garbage, tree huggers. - False claims that scientists weren't factoring in heat island effect, solar variation, etc. - Create straw man arguments (that aren't real) and then dissect them. – If temperature leads CO2, this proves that CO2 doesn't cause warming. WRONG - Over blow the significance of unknowns, as if everything was in question. News - News is a business paid for by business with a bias. - Controversy and Manufactured Controversy Sells: Fox News, NY Times, Guardian, etc. - How many ads are paid for by scientists? How about Koch Brothers and ExxonMobil?
IPCC Errors: Facts and Spin - IPCC is a volunteer organization with 10 full-time staff members. Reports come out every 6-7 yrs, taking about 3 yrs to write. Three working groups. - WG1 deals with the physical climate science basis, as assessed by the climatologists. - WG2 deals with impacts of climate change on society and ecosystems, as assessed by social scientists, ecologists, etc. - WG3 deals with mitigation options for limiting global warming, as assessed by energy experts, economists, etc. IPCC 2007 Report Errors #1: Himalayan glaciers: In a regional chapter on Asia in Vol 2, written by authors from the region, it wrongly stated that 80% of Himalayan glacier area would very likely be gone by This is not the proper IPCC projection of future glacier decline, which is found in Volume 1 (Ch4) of the report whose one author, Georg Kaser, found the error. #2: Sea level in the Netherlands: WG2 report states that “The Netherlands is an example of a country highly susceptible to both sea-level rise and river flooding because 55% of its territory is below sea level,” provided by a Dutch government agency, the Netherlands Environmental Assessment Agency, that has published a correction- the sentence should have read “55 per cent of the Netherlands is at risk of flooding; 26 per cent of the country is below sea level, and 29 per cent is susceptible to river flooding”. Ref:
Follow the Money: Vested Interests Attack Climate Science Fossil fuel companies support disinformation to maintain market share. A Carbon Tax would greatly impact their future profits. Koch Industries: Oil-Gas: Out of Balance, ExxonMobil's Impact on Climate Change, IPCC 2007 Errors (2). See Example Contrarian “Science” Web Sites: Competitive Enterprise Institute, American Thinker, etc. Repeats misstatements & known items but misinterprets. “There has been no global warming since 1995! Warming periods have happened before - but NOT due to man-made changes.” “The climate consensus promoted by Big Business, Big Government, Big Media and Big Academia has come unstuck.” 2/16/10 - “Should you believe anything John Christy and Roy Spenser Say?” Excellent little piece about their mistakes and views- Real Science... -Real Climate: -Skeptical Science: Getting skeptical about global warming skepticism: - Science of Doom: Good site for those willing to learn: -Climate Denial with Peter Sinclair: Crock of the Week (videos):
Global warming challenges Personal - Humans adapt. Even the abnormal can seem normal... - Lack of critical thinking. Risk: Nuclear-Coal, Driving-Airplane, Terrorist-Tobacco - We're not good at judging big things. - We like to thing we are good people. If we admit responsibility, what are we going to do? - It costs to do the right thing. Why should we when others don't? - We view the world through colored glasses. Religious, conservative-liberal, love-hates. Systemic - Culture: In America little importance is given to total societal benefit versus personal & corporate freedom. - Culture: Polarized. We don't trust the other guy... - Government and business lie: Iraq War, Tar Sands, Goldman Sachs, tobacco, oil, Enron - Mainstream news ignores greater understanding for a moving foreground with no context. - Special interests control the conversation. See Chomsky's 'Manufacturing Consent'. - Judicial system is designed to protect the existing order. (freedom for elections) - 'An Inconvenient Truth' Our system is destroying the planet but how does it change itself? - Culture: Movies and books often give us the illusion that the good guy wins. - Culture: Practicality of getting elected. Many Republicans can't get elected if they support AGW. President Bill Clinton scrapped the fast breeder reactor for political reasons: - Science: Tends to be conservative. Relative truth progresses slowly as things are tested. - Science doesn't make policy decisions, politicians do. - We only have so much resources. Trillions committed to subsidize failed banks, prop up housing prices, and maintain the status quo.
Inconvenient Truths... Threats... - Rising sea levels threaten coastal areas, a rise of 1m, displaces 10% of population - Rising population levels stress the system for more food supplies. - Rising industrialization throughout the world: China, India, Brazil... - Insect population increases, with higher temperatures - Agricultural yields generally reduced by climate change. Why Don't We Act? - Business as usual is what got us into this mess. - Corrupt political system allows vested interests to write legislation. - Political polarization. - Long term problems take a back seat to short term goals (profits, employment). - Anti-science culture. Only 39% of Americans believe in evolution which correlates well to 43% who believe in anthropogenic climate change. Source: PEW Poll 1/25/09, How Can We Act? - Act individually to make a difference. - Encourage your government(s) to act to raise efficiency standards. - Support a carbon tax to send a clear message to the marketplace. Although many individuals see a carbon trading scheme as an indirect tax and yet another financial bubble, a fair carbon tax would spur on real change, see Climate Models predict an increasing hostile world
Tipping Points- It's been so little... What positive feedback threats? + Permafrost thaws, releases gigatons CO2 + Oceans saturate with CO2 + Glaciers melt, replacing reflective ice with water The Earth's temperature has risen in the last 100 years, about 0.73 C, with sea level rising cm (6-8”) (15 – 20cm) What Can You Do? Cut your energy use. - Drive less. Carpool. Use mass transit. - Increase insulation in your home. - Get a white roof. - Learn more about AGW and talk with someone to learn more, instead of exchanging insults. - Write your congressman and president about a tax on fossil fuel combustion & to quit burning coal. - Support new technologies. Brunt of the Costs Will Be Paid by Future Generations... Image shows methane bubbling up from permafrost