FREE ELECTRONIC LIBRARY - Dissertations, online materials

Pages:     | 1 |   ...   | 7 | 8 || 10 |

«DIRECT TESTIMONY OF JAMES E. HANSEN Q. Please state your name and business address. A. My name is James E. Hansen. My business address is 2880 ...»

-- [ Page 9 ] --

Garzione, C.N., P. Molnar, J.C. Libarkin and B.J. MacFadden, Rapid late Miocene rise of the Bolivian Altiplano:

evidence for removal of mantle lithosphere, Earth Planet. Sci. Lett. 241, 543-556, 2006.

Hansen, J., A. Lacis, D. Rind, G. Russell, P. Stone, I. Fung, R. Ruedy and J. Lerner, Climate sensitivity: Analysis of feedback mechanisms. In Climate Processes and Climate Sensitivity, Geophys. Monogr. Ser. 29 (eds. J.E.

Hansen & T. Takahashi), pp. 130-163. Washington, D.C.: American Geophysical Union, 1984.

Hansen, J., G. Russell, A. Lacis, I. Fung, D. Rind and P. Stone, Climate response times: dependence on climate sensitivity and ocean mixing, Science 229, 857-859, 1985.

Hansen, J., M. Sato, R. Ruedy, A. Lacis and V. Oinas, Global warming in the twenty-first century: an alternative scenario, Proc. Natl. Acad. Sci 97, 9875-9880, 2000.

Hansen, J. and M. Sato, Greenhouse gas growth rates, Proc. Natl. Acad. Sci. 101, 16109-16114, 2004.

Hansen, J., A slippery slope: how much global warming constitutes “dangerous anthropogenic interference”?, Clim. Change 68, 269-279, 2005.

Hansen, J. et al., Efficacy of climate forcings, J Geophys. Res. 110, D18104, 2005a.

Hansen, J. et al., Earth’s energy imbalance: confirmation and implications, Science, 308, 1431-1435, 2005b.

Hansen, J., M. Sato, R. Ruedy, K. Lo, D.W. Lea, and M. Medina-Elizade, Global temperature change, Proc. Natl Acad. Sci. 103, 14288-14293, 2006.

Hansen, J.E., Scientific reticence and sea level rise, Environ. Res. Lett. 2, 1-6, 2007a.

Hansen, J., presentation at American Geophysical Union, December, 2007b.

Hansen, J., How can we avert dangerous climate change? ArXiv: 0706.3720v1, 2007c.

Hansen, J., M. Sato, P. Kharecha, G. Russell, D.W. Lea and M. Siddall, Climate change and trace gases, Phil.

Trans. Royal Soc. A 365, 1925-1954, 2007a.

Hansen, J. and 46 co-authors, Dangerous human-made interference with climate: a GISS modelE study, Atmos.

Chem. Phys., 7, 1-26, 2007b.

Hansen, J. and M. Sato, Climate forcings in the Cenozoic (in preparation).

Hays, J.D., J. Imbrie and N.J. Shackleton, Variations in the Earth’s orbit: pacemaker of the ice ages, Science 194, 1121-1132, 1976.

Iaffaldano, G., H.P. Bunge and M. Bucker, Mountain belt growth inferred from histories of past plate convergence: a new tectonic inverse problem, Earth Planet. Sci. Lett. 260, 516-523, 2007.

Intergovernmental Panel on Climate Change (IPCC) Climate Change 2001: The Scientific Basis (eds. J.T.

Houghton., Y. Ding, D.J. Griggs, M. Noguer, P.J. van der Linden, X. Dai, K. Maskell & C.A. Johnson).

Cambridge University Press, 2001.

33 IPCC, Climate Change 2007: The Physical Basis – Summary for Policymakers.

(http://www.ipcc.ch/SPM2feb07.pdf), 2007.

Keller, E.A. and N. Pinter, Active tectonics: earthquakes, uplift, and landscape, in This Dynamic Earth: The Story of Plate Tectonics, eds. J. Kious and R.I. Tilling, Prentice-Hall, on-line at http://pubs.usgs.gov/publications/text/dynamic.html Lear, C.H., H. Elderfield and P.A. Wilson, Cenozoic deep-sea temperatures and global ice volumes from Mg/Ca in benthic foraminiferal calcite, Science 287, 269-272, 2000.

Lear, C.H., Y. Rosenthal, H.K. Coxall and P.A. Wilson, Late Eocene to early Miocene ice sheet dynamis and the global carbon cycle, Paleooceanography 19, PA4015, 2004.

Lisiecki, L.E. and M.E. Raymo, A Pliocene-Pleistocene stack of 57 globally distributed benthic δ18O records, Paleoceanography 20, PA1003, doi:10.1126/science.1130776, 2005.

Pagani, M., J.C. Zachos, K.H. Freeman, B. Tipple and S. Bohaty, Marked decline in atmospheric carbon dioxide concentrations during the Paleogene, Science 309, 600-603, 2005.

Raymo, M.E. and W.F. Ruddiman, Tectonic forcing of late Cenozoic climate, Nature 359, 117-124, 1992.

Rind, D. and M.A. Chandler, Increased ocean heat transports and warmer climate, J. Geophys. Res. 96, 7437Royer, D.L., R.A. Berner, I.P. Montanez, N.J. Tabor and D.J. Beerling, CO2 as a primary driver of Phanerozoic climate, GSA Today 14, 4-10, 2004.

Royer, D.L., CO2-forced climate thresholds during the Phanerozoic, Geochim. Cosmochim. Acta 70, 5665-5675, 2006.

Sackmann, L.J., A.I. Boothroyd and K.E. Kraemer, Our sun III: present and future, Astrophys. J. 418, 457-468, 1993.

Shindell, D.T. and G.A. Schmidt, Southern Hemisphere climate response to ozone changes and greenhouse gas increases, Geophys. Res. Lett. 31, L18209, 2004.

Siddall, M., E.J. Rohling, A. Almogi-Labin, Ch. Hemleben, D. Meischner, I. Schmelzer and D.A. Smeed, Sealevel fluctuations during the last glacial cycle, Nature 423, 853-858, 2003.

Staudigel, H., S.R. Hart, H.U. Schmincke and B.M. Smith, Cretaceous ocean crust at DSDP sites 417 and 418:

carbon uptake from weathering versus loss by magmatic outgassing, Geochim. Cosmochim. Acta 53, 3091Thompson, D.W.J. and S. Solomon, Interpretation of recent Southern Hemisphere climate change, Science 306, 255-258, 2002.

Vimeux, F., K. M. Cuffey and J. Jouzel, New insights into Southern Hemisphere temperature changes from Vostok ice cores using deuterium excess correction, Earth Planet. Sci. Lett. 203, 829-843, 2002.

Walter, K.M., S.A. Zimov, J.P. Chanton, D. Verbyla and F.S. Chapin, Methane bubbling from Siberian thaw lakes as appositive feedback to climate, Nature 443, 71-75, 2006.

Wilson, E.O., The Creation, W.W. Norton, New York, 2006.

Zachos J., M. Pagani, L. Sloan, E. Thomas and K. Billups, Trends, rhythms, and aberrations in global climate 65 Ma to present, Science 292, 686-693, 2001.

34 Figure 1. (a) Global surface temperature relative to 1951-1980 base period mean, based on surface air measurements at meteorological stations and ship and satellite SST (sea surface temperature) measurements, (b) temperature anomaly for first six years of the 21st century relative to 1951-1980 base period (update of figures of Hansen et al., Proc. Natl. Acad. Sci. 103, 14288-14293, 2006). Green vertical bars in (a) are estimated 2σ error (95% confidence) of annual global mean temperature anomaly.

Figure 2. Temperature change in Antarctica over the past 420,000 as inferred from the isotopic composition of snow preserved in the ice sheet and extracted in the Vostok ice core (Vimeux et al.

, Earth Planet. Sci. Lett. 203, 829-843, 2002).

Figure 3. Temperature, CO2, and sea level.

See Hansen et al. (2007) for original data sources.

Figure 4. Distribution of early urban societies.

Coastal mangroves and salt marshes shown by dark and light shades. (after Day, J.W. et al., EOS Trans. AGU, 88, 169-170, 2007).

Figure 5. CO2, CH4, and temperature from the Vostok Antarctic ice core (Vimeux et al.


Figure 6. (a) sea level records from three sources, (b) climate forcings due to greenhouse gases (CO2, CH4 and N2O) and surface albedo from the Siddall et al.

sea level record, (c) calculated and observed paleo temperature change. Calculated temperature is the product of the sum of the two forcings in (b) and ¾°C per W/m2. Observed temperature is the Vostok temperature (Figure 2) divided by two.

Figure 7. (a) Antarctic temperature from Vostok ice core (Vimeux et al.

2002) and global climate forcing (right scale) due to CO2, CH4 and N2O. (b) Correlation (%) diagram showing lead of temperature over greenhouse forcing.

Figure 8. Extension of Antarctic CO2, CH4 and temperature records of Figure 5 into modern era.

Antarctic temperature is divided by two to make it comparable to global temperature extension.

Figure 9. Continental positions at four times (adapted from Keller and Pinter 1996).

Figure 10. (a) Global compilation of deep-sea benthic foraminifera 18O isotope records from Deep Sea Drilling Program and Ocean Drilling Program sites (Zachos et al 2001), temperatures applying only to ice-free conditions, thus to times earlier than ~35 My BP.

The blue bar shows estimated times with ice present, dark blue being times when ice was equal or greater than at present. (b) Expansion of 18O data for past 3.5 My. (Lisiecki and Raymo 2005) (c) Temperature data based on Vostok ice core (Vimeux et al 2002).

Figure 11. Principal inferences from Cenozoic Era relevant to present-day climate.

Figure 12. Increased tilt of Earth’s spin axis exposes both poles to greater melt of high latitude ice.

Figure 13. Principal inferences from Pleistocene climate variations.

Figure 14. (A) Estimates of CO2 in the Phanerozoic based on proxy CO2 data and GEOCARB-III model of Berner and Kothavala (2001), (B) Intervals of glacial (dark) or cool (light) climates, (C) Latitudinal distribution of direct glacial records (tillites, striated bedrock, etc.

, from Crowley 1998). Figure is from Royer at al. (2004).

Figure 15. (A) Climate forcings since 1880, relative to the forcings in 1880.

The largest forcing is the positive (warming) forcing due to greenhouse gases, but human-made aerosols and occasional volcanoes provide significant negative forcings. (B) Observed global temperature and temperature simulated with the GISS global climate model, which has climate sensitivity 2.8°C for doubled CO2, using the forcings in (A). (C) Climate response function (% of equilibrium response) obtained with GISS atmosphere modelE connected to the Russell ocean model (from Hansen et al. 2007b) Figure 16. Extension of climate simulations through the 21st century. A1B (dark blue line) is a typical “business-as-usual” scenario for future greenhouse gas amounts. The “alternative scenario” has CO2 peaking near 450 ppm, thus keeping additional warming beyond that in 2000 less than 1°C.

Figure 17. Practically all nations in the world, including the United States, have signed the Framework Convention on Climate Change.

The problem is that “dangerous anthropogenic interference” in not defined.

Figure 18. Suggested principal metrics for defining the “dangerous” level of climate change.

Figure 19. Area on Greenland with summer surface melt fluctuates from year to year, but has been increasing during the period of satellite observations.

Recent years, not shown, have broken the record set in 2002.

Figure 20. Summer surface melt-water on Greenland burrows a hole in the ice sheet, more than a mile thick, that carries water to the base of the ice sheet.

There it serves as lubrication between the ice sheet and the ground beneath the ice sheet.

Figure 21. The rate of discharge of giant icebergs from Greenland has doubled in the past decade.

Figure 22. The GRACE satellite mission measures the Earth’s gravitational field with such high precision that changes of the mass of the Greenland and Antarctic ice sheets can be measured.

The ice sheet mass grows with winter snowfall and decreases during the melt season. Overall Greenland and West Antarctica are each now losing mass at rates of the order of 150 cubic kilometers of ice per year.

Figure 23. A majority of the world’s 100 largest cities are located on coast lines.

Figure 24. A sea level rise of 25 meters would displace about 1 billion people.

Even a 5-7 meter sea level rise would affect a few hundred million people, more than 1000 greater than the number of people in New Orleans affected by the Katrina hurricane disaster.

Paleo and Modern Temperatures in Critical Global Regions

Figure 25. Temperatures in the Pacific Warm Pool (a) and Indian Ocean (b), regions of special significance for global climate.

Warm Pool temperature affects the transport of heat to much of the world via ocean and atmosphere;

the Indian Ocean has the highest correlation with global mean temperature. In both regions warming of recent decades has brought the temperature within less than 1°C of the temperature during the warmest interglacial periods.

Figure 26. Unchecked global warming will, in effect, push polar species off the planet.

Mt. Graham Red Squirrel

Figure 27. Alpine species can also be pushed to extinction as global warming causes isotherms to move up the mountains.

The Mt. Graham red squirrel is an example of a threatened species. Impacts of climate change occur in bursts; forest fires in the lower reaches of the forested region cause permanent change, as the forests are unable to recover.

Figure 28. The millions of species on the planet are being stressed in several ways, as humans have taken over much of the planet.

Based on prior global warmings in the Earth’s history, much slower than the present humaninduced climate change, it is expected that the added stress from the large global climate change under business-asusual scenarios would lead to eventual extinction of at least several tens of percent of extant species.

Figure 29. Critical carbon cycle facts.

(a) A pulse of CO2 added to the atmosphere by burning fossil fuels decays rapidly at first, with about half of the CO2 taken up by sinks, principally the ocean, within the first quarter century. However, uptake slows as the CO2 added to the ocean exerts a back-pressure on the atmosphere. Even after 1000 years almost one-fifth of the increase due to the initial pulse is still in the atmosphere. (b) Fossil fuel reservoirs are finite. Oil and gas proven and estimated reserves are sufficient to take atmospheric CO2 to the neighborhood of 450 ppm. Coal and unconventional fossil fuels, if exploited without carbon capture, have the potential to at least double or triple the pre-industrial atmospheric CO2 amount of 280 ppm.

Figure 30. CO2 can be kept below 450 ppm only if coal and unconventional fossil fuels are used only where the CO2 is captured and sequestered.

Pages:     | 1 |   ...   | 7 | 8 || 10 |

Similar works:

«Corporate Finance Corporate Finance Theory and Practice Second Edition Vishwanath S.R. Response Books A division of Sage Publications New Delhi/Thousand Oaks/London Copyright © Vishwanath S.R., 2000, 2007 All rights reserved. No part of this book may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording or by any information storage or retrieval system, without permission in writing from the publisher. First published in 2000 This...»

«ACRN Journal of Finance and Risk Perspectives Vol. 3, Issue 2, June 2014, p. 10 26 ISSN 2305-7394 AN ANALYSIS OF THE EFFECTS OF THE FINANCIAL CRISIS ON ENTERPRISE RISK MANAGEMENT IN THE CANADIAN FINANCIAL SECTOR Michael Maingot, Tony Quon and Daniel Zéghal1 1 Telfer School of Management, University of Ottawa, Canada Abstract. The effect of the financial crisis on enterprise risk management (ERM) disclosures was examined through a content analysis of the 2007 and 2008 annual reports of Canadian...»

«1 Enacted metaphor: the theatricality of the entrepreneurial process Alistair R Anderson Professor of Entrepreneurship The Charles Skene Centre for Entrepreneurship Aberdeen Business School Robert Gordon University Aberdeen AB 10 7QE email a.r.anderson@rgu.ac.uk Abstract The paper proposes the value of theatricality as an addition conceptual tool to aid analysis and understanding of the entrepreneurial process. It explores the application of dramatism and dramaturgy and argues that the...»

«Timba Music in Cuba By this time the seeds planted by the [Cuban] revolution were sprouting up everywhere like weeds. The ENA, the state music conservatory was and still is turning out astonishing numbers of brilliant and hungry virtuoso musicians. Any Cuban bandleader can almost immediately find dozens of teenage musicians of all instruments, any one of whom is capable of simply blowing the socks off of the best American musicians in any major city. The US embargo and the demise of the Soviet...»

«SPEAKERS PROFILE                                                                                                                                                                                                            Discourse 1: Determining Regional Policies and Strategies in Managing Energy...»

«South East Asia Journal of Contemporary Business, Economics and Law, Vol. 4, Issue 1 (June) 2014 ISSN 2289-1560 EFFICIENT MARKET HYPOTHESIS EVALUATION USING PSYCHOLOGY AND NEUROECONOMIC PERSPECTIVE: A CRITICAL ANALYSIS Made Sudarma Ali Djamhuri Zaki Baridwan Satia Nur Maharani Email: tiamaharani@ymail.com ABSTRACT Investment decision-making process involves a relatively complex behavior, and is influenced by several factors. At least there are two fundamental factors that affect the process are...»


«VITA Alan E. Grunewald Professor of FinanceMichigan State University 2010 EDUCATION University of WisconsinMadison Major: Finance and Economics Minors: Law and Public Utilities Ph.D. 1955 Major: Finance M.B.A. 1953 Major: Economics M.S. 1951 University of WisconsinMilwaukee Major: Education. Minors: Economics and Sociology B.S. 1949 U.S. Army ROTC 1951 1953 U.S. Army Air Corp. – 18 months active duty 1945 – 1946 FOREIGN LANGUAGES Speak fluent German and some Portuguese and Spanish Studied...»

«IOSR Journal of Business and Management (IOSR-JBM) ISSN: 2278-487X. Volume 7, Issue 2 (Jan. Feb. 2013), PP 94-100 www.iosrjournals.org Determinants of Corporate Liquidity An Analysis of Cash Holdings 1 Sara Anjum, 2Qaisar Ali Malik 1 FUIRC, Department of Business & Economics. 2 Assistant Professor, FUIRC, Department of Business & Economics. Abstract: The objective of the study is to determine and measure how and to what extent size of the firm, net working capital, leverage, cash conversion...»

«Monetary and Fiscal Policies Post 25th January Revolution: Fighters against Windmills To be presented at the first graduate conference: Egypt in the Arab Spring: Perspectives from Economics and Democratisation Studies London School of Economics, London, 28 September 2012 By Heba Talla Atef Sayed Emam Msc. in Economics Teaching Assistant Economics Department Faculty of Economics and Political Science Abstract The political events that unfolded in Egypt since the 25th January revolution took its...»

«International Journal of Business and Behavioral Sciences Vol. 4, No.3; March 2014 Investing The Relationship Between Size, Financial Leverage and Diversification of Products and Market With Companies' Score Disclosure Nasrin Fallah Zarjo1, & Farzin Rezaei2 1 Department of Accounting, Science and Research Branch, Islamic Azad University, Ghazvin, Iran, 2 Assistant professor Department of Management and Accounting,, Islamic Azad University, Ghazvin Branch, Ghazvin,Iran Abstract The main...»

«Global Economic Governance Initiative G E G I W O R K I N G PA P E R 0 0 2 • 0 5 / 2 0 1 6 GLOBAL ECONOMIC GOVERNANCE Fueling Growth and Financing Risk: The benefits and risks of China’s development finance in the global energy sector K E V I N P. G AL L AG H ER, ROHINI KA MA L, YON G ZHON G WA N G EXECUTIVE SUMMARY Kevin P. Gallagher is Professor of Global Development Policy and In just over a decade Chinese policy banks have emerged as global leaders in development co-director of the...»

<<  HOME   |    CONTACTS
2016 www.dissertation.xlibx.info - Dissertations, online materials

Materials of this site are available for review, all rights belong to their respective owners.
If you do not agree with the fact that your material is placed on this site, please, email us, we will within 1-2 business days delete him.