Lunt et al., EGU 2008 Atmospheric CO 2 decrease led to Greenland glaciation in the Late Pliocene D.J. Lunt, G.L. Foster, A.M. Haywood, E.J. Stone Motivation.

Slides:

Advertisements

Similar presentations

Presenter Name(s) Issue date National Student.

Advertisements

Dan LuntEGU 2013Dan Lunt Can Cretaceous and Eocene Data Inform Estimates of Future Climate Sensitivity? Dan Lunt, Claire Loptson, Paul Markwick Introduction.

New estimates of Earth system sensitivity from the Cenozoic Introduction: Earth system sensitivity Case study 1: The mid Pliocene Case study 2: The PETM.

A mechanism for the orbital pacing of Eocene hyperthermals Dan Lunt, Andy Ridgwell, Appy Sluijs, Jim Zachos Stephen Hunter, Alan Haywood Introduction.

Quaternary modelling case studies 1)Last Glacial Inception : ~115kyrBP 2)Last Glacial Maximum : ~21kyrBP 3)The mid-Holocene : ~6kyrBP.

EGU 2007, CR140 Dan Lunt Introduction. GCM and ice sheet simulations. Conclusions. Other mechanisms for inception. Future plans. The closure of the Panama.

Pliocene Climate Modelling, and the onset of Northern Hemisphere Glaciation 1)The Pliocene 2)Expansion of Greenland glaciation in the Late Pliocene – uncertainties.

The role of the stratosphere in extended- range forecasting Thomas Jung Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Germany.

Changing ENSO regimes and the Asian-Australian monsoon system in a future climate scenario Andrew Turner Pete Inness & Julia Slingo AAMP8, Honolulu,

The effect of doubled CO 2 and model basic state biases on the monsoon- ENSO system Andrew Turner, Pete Inness, Julia Slingo Walker Institute / NCAS-Climate.

The effect of doubled CO 2 and model basic state biases on the monsoon- ENSO system: the mean response and interannual variability Andrew Turner, Pete.

Comparing hypotheses for Pliocene tropical warmth Chris Brierley & Alexey Fedorov Yale University.

1 Back into the Icehouse GEOL 3100 Christina Gallup.

Lecture 7: Back into the Icehouse: Last 55 Myr (Chapter 6)

Paleoclimatology and Climate History – HS 2009 Pliocene, El Niño and Northern / Southern Hemisphere Glaciation Pliocene, El Niño and Northern /

Abrupt Climate Change Evidence of climate changes that are too abrupt to be explained orbitally.

On the Origin of Antarctic Warming Events: A Modeling Study of Causes and Effects Oliver Timm, Laurie Menviel, Axel Timmermann International Pacific Research.

Don’t Discount the Tropics “Challenges to our understanding of the general circulation: abrupt climate change” R. Seager and D.S. Battisti 2007 Laura Zaunbrecher.

Didier Swingedouw (1), Fichefet T. (1), Huybrechts P. (2), Goosse H. (1), Driesschaert E, Loutre M.-F (1), (1) Université catholique de Louvain, Institut.

Variability and Trends of Air Temperature and Pressure in the Maritime Arctic, Air Temp. and press. show strong multidecadal variability on timescales.

Time scale of climate change Rates of forcing vs. response.

Climatic changes in the last 200 years (Ch. 17 & 18) 1. Is it warming? --climate proxy info (recap) -- info from historical & instrumental records 2. What.

Lecture 13 Orbital-Scale Interactions, Feedbacks and Unresolved Problems The Cause of Glacial Cycles? (Chapter 11)

Lecture 5: Plate Tectonics and Climate Last 550 Myr (chapter 4)

O. Elison Timm 1 A. Timmermann 1,4 T. Friedrich 1 A. Abe-Ouchi 2,3 J. Knies 5 Forced response of a Northern Hemisphere ice-sheet model to climate changes.

1. How has the climate changed during the recent past? 2. What can we say about current climate change? 3. How do climate models work and what are their.

Global Warming Winter Storming Ellen E. Martin Dept of Geological Sciences Snow angel Ocala, Florida, Jan. 8, 2010.

EARTH’S CLIMATE PAST and FUTURE SECOND EDITION CHAPTER 16 Climate Changes During the Last 1000 Years WILLIAM F. RUDDIMAN © 2008 W. H. Freeman and Company.

University of Nebraska  Lincoln R School of Natural Resources Atlantic SST influences on North American Drought: A case study on the Medieval Warm period.

AGU, San Francisco, 2013 Modelled insights into climate dynamics of the Cretaceous and Paleogene greenhouse Dan Lunt, Claire Loptson, Alex Farnsworth,

Supplementary information to chapter 5.8: Modelling the end of an interglacial (MIS 1, 5, 7, 9, 11) Claudia Kubatzki*, Martin Claussen**, Reinhard Calov,

Phanerozoic 550 Ma. Cenozoic 65 Ma Late Cretaceous Southern Ocean Not shown – plateaus in the southern Indian Ocean.

Eocene ENSO Matthew Huber Purdue University Breckenridge 2003, PaleoWorking Group All rights reserved by author as applicable.

The von Post Lecture: Can Models Reproduce Climates of the Past? Alan Haywood, Aisling Dolan, Stephen Hunter, Daniel Hill, Ulrich Salzmann, Harry Dowsett,

CDC Cover. NOAA Lab roles in CCSP Strategic Plan for the U.S. Climate Change Science Program: Research Elements Element 3. Atmospheric Composition Aeronomy.

Climate Change and Global Warming Michael E. Mann Department of Environmental Sciences University of Virginia Symposium on Energy for the 21 st Century.

Possible Causes of Climate Change  Plate Tectonics and Mountain Building Theory of plate tectonics Ridge and subduction Mountain interaction with airflow.

Global Energy Balance and the Greenhouse Effect What determines Earth’s surface temperature? What is the history of CO 2 on Earth? ultravioletinfrared.

Long-Term Changes in Global Sea Level Craig S. Fulthorpe University of Texas Institute for Geophysics John A. and Katherine G. Jackson School of Geosciences.

Understanding Pliocene Climate: The Pliocene Model Intercomparison Project Alan Haywood, Aisling Dolan, Stephen Hunter, Daniel Hill, Ulrich Salzmann, Harry.

14.3 – CLIMATIC CHANGES. Ice Age  Periods of extensive glacial coverage  Lots of ice sheets  Average global temperature decreased by about 5°C  Most.

Most of this course is about the basic state of the Earth’s climate system and its governing forces. However the climate state varies across a wide range.

Past and Future Climate Simulation Lecture 5 Geoengineering our Climate  What is geoengineering?  Focus on sunshade geoengineering  Should we geoengineer.

CE 401 Climate Change Science and Engineering geologic past and evolution of climate change since the industrial revolution 3 February 2011

The Pliocene Warm Interval: Is It An Analogue For Future Warming? The Pliocene Epoch (5.3 to 2.6 Ma) is the last “great global warming” before the beginning.

A GCM Reconstruction of the Last Glacial Inception Megan Essig 1, Francis Otieno 2, Robert Oglesby 1, David Bromwich 2 1 Department of Geosciences, University.

1 2009/12/17 闕珮羽. 2 Introduction This paper shows that the internal mechanism has an intrinsic timescale of 100,000 years The 100,000-year cycles and.

Global Climate Change: Past and Future Le Moyne College Syracuse, New York February 3, 2006 Department of Meteorology and Earth and Environmental Systems.

Willie Soon. Introduction 1. The relationship between atmospheric CO2 and CH4 concentrations, temperature, and ice-sheet volume 2. Atmospheric CO2 radiative.

Ice Ages. From the Last class, this implies a change of /160 = 4% change in the incoming solar constant – this is too small of variation.

Factor Influencing Climate Change Tectonics Ocean Circulation Patterns and the Thermohaline Cycle Orbital Forcing Mechanisms Atmospheric Variations.

Climate Change and Global Warming Michael E. Mann Department of Environmental Sciences University of Virginia Waxter Environmental Forum Sweet Briar College.

Boulder, June, 2006 Extremes in Ensemble Simulations of the Maunder Minimum: Midlatitude Cyclones, Precipitation, and Wind speed Christoph Raible (1) M.

Orbital Hypothesis of Climate Change & Pleistocene Ice Ages.

A BOUT MY THESIS 2010/03/02 Pei-Yu Chueh. M OTIVATION An Inconvenient Truth: The temperature was determined by the concentrations of carbon dioxide. (Al.

AGU, San Francisco, 2013 The role of palaeogeography in controlling Pliocene climate and climate variability Dan Lunt, Paul Markwick Gavin Foster, Alan.

Equatorial Atlantic Variability: Dynamics, ENSO Impact, and Implications for Model Development M. Latif 1, N. S. Keenlyside 2, and H. Ding 1 1 Leibniz.

Our water planet and our water hemisphere

Can Geoengineering save the Greenland ice sheet?

Mountains, climate, and carbon

A Fully Coupled GCM Study of a "Geoengineered World"

Global Climate Change: Past and Future

Climate and Global Dynamics Laboratory, NCAR

Modelling Ancient Earth Climates Manchester Geologist Association

Evolution of the Asian monsoon from the Cretaceous to the modern – a modelling study. Dan Lunt, Alex Farnsworth, Claire Loptson, Paul Markwick “How has.

D.J. Lunt, G.L. Foster, A.M. Haywood, E.J. Stone Motivation

Climate Change.

Modelling Climate and Water Isotope Signatures of El Niño in the Pliocene Julia Tindall and Alan Haywood AGU Fall Meeting 15th December 2015.

Global Changes in Climate

Transient simulations of the last 30,000 years, within the GENIE earth-system framework D.J. Lunt (1) M.Williamson (2) A. Price (3) P.J. Valdes (1)

Presentation transcript:

Lunt et al., EGU 2008 Atmospheric CO 2 decrease led to Greenland glaciation in the Late Pliocene D.J. Lunt, G.L. Foster, A.M. Haywood, E.J. Stone Motivation Experimental Design Results Conclusions Future Work / Implications

Lunt et al., EGU 2008 The Causes of Northern Hemisphere Glaciation? Zachos et al, Nature, 2001

Lunt et al., EGU 2008 The Causes of Northern Hemisphere Glaciation? 5 main hypotheses (1) Closure of Panama Seaway (2) Tectonic Uplift (3) Termination of Permanent El Nino (4) Decrease in CO 2 (5) Oribital variations

Lunt et al., EGU 2008 The Causes of Northern Hemisphere Glaciation? 5 main hypotheses (1) Closure of Panama Seaway (2) Tectonic Uplift (3) Termination of Permanent El Nino (4) Decrease in CO 2 (5) Oribital variations Ruddiman, p163

Lunt et al., EGU 2008 The Causes of Northern Hemisphere Glaciation? 5 main hypotheses (1) Closure of Panama Seaway (2) Tectonic Uplift (3) Termination of Permanent El Nino (4) Decrease in CO 2 (5) Oribital variations Bartoli et al, 2005

Lunt et al., EGU 2008 The Causes of Northern Hemisphere Glaciation? 5 main hypotheses (1) Closure of Panama Seaway (2) Tectonic Uplift (3) Termination of Permanent El Nino (4) Decrease in CO 2 (5) Oribital variations

Lunt et al., EGU 2008 The Causes of Northern Hemisphere Glaciation? 5 main hypotheses (1) Closure of Panama Seaway (2) Tectonic Uplift (3) Termination of Permanent El Nino (4) Decrease in CO 2 (5) Oribital variations Ruddiman and Kutzbach, 1989

Lunt et al., EGU 2008 The Causes of Northern Hemisphere Glaciation? 5 main hypotheses (1) Closure of Panama Seaway (2) Tectonic Uplift (3) Termination of Permanent El Nino (4) Decrease in CO 2 (5) Oribital variations Japsen and Chalmers, 2000 Parrish et al, 2007

Lunt et al., EGU 2008 The Causes of Northern Hemisphere Glaciation? 5 main hypotheses (1) Closure of Panama Seaway (2) Tectonic Uplift (3) Termination of Permanent El Nino (4) Decrease in CO 2 (5) Oribital variations

Lunt et al., EGU 2008 The Causes of Northern Hemisphere Glaciation? 5 main hypotheses (1) Closure of Panama Seaway (2) Uplift of Rockies (3) Termination of Permanent El Nino (4) Decrease in CO 2 (5) Oribital variations Molnar and Cane, 2002

Lunt et al., EGU 2008 The Causes of Northern Hemisphere Glaciation? 5 main hypotheses (1) Closure of Panama Seaway (2) Uplift of Rockies (3) Termination of Permanent El Nino (4) Decrease in CO 2 (5) Oribital variations e.g. Wara et al, 2005

Lunt et al., EGU 2008 The Causes of Northern Hemisphere Glaciation? 5 main hypotheses (1) Closure of Panama Seaway (2) Uplift of Rockies (3) Termination of Permanent El Nino (4) Decrease in CO 2 (5) Oribital variations

Lunt et al., EGU 2008 The Causes of Northern Hemisphere Glaciation? 5 main hypotheses (1) Closure of Panama Seaway (2) Uplift of Rockies (3) Termination of Permanent El Nino (4) Decrease in CO 2 (5) Oribital variations

Lunt et al., EGU 2008 The Causes of Northern Hemisphere Glaciation? 5 main hypotheses (1) Closure of Panama Seaway (2) Uplift of Rockies (3) Termination of Permanent El Nino (4) Decrease in CO 2 (5) Oribital variations Raymo et al, ppmv mean, 425ppmv max

Lunt et al., EGU 2008 The Causes of Northern Hemisphere Glaciation? 5 main hypotheses (1) Closure of Panama Seaway (2) Uplift of Rockies (3) Termination of Permanent El Nino (4) Decrease in CO 2 (5) Oribital variations 400ppmv to 280ppmv

Lunt et al., EGU 2008 Spinup of GCM simulations…

Lunt et al., EGU 2008 PanamaENSORockiesCO 2 Temp Precip GCM results…

Lunt et al., EGU 2008 Ice sheet model results…

Lunt et al., EGU 2008 Ice sheet model results…

Lunt et al., EGU 2008 Ice sheet model results…

Lunt et al., EGU 2008 Ice sheet model results…

Lunt et al., EGU 2008 Ice sheet model results…

Lunt et al., EGU 2008 (1) Closure of Panama Seaway (2) Uplift of Rockies (3) Termination of Permanent El Nino (4) Decrease in CO 2 (5) Oribital variations From Berger and Loutre, 1991 The Causes of Northern Hemisphere Glaciation? 5 main hypotheses

Lunt et al., EGU 2008 (1) Closure of Panama Seaway (2) Uplift of Rockies (3) Termination of Permanent El Nino (4) Decrease in CO 2 (5) Oribital variations Maslin et al, 1998 The Causes of Northern Hemisphere Glaciation? 5 main hypotheses

Lunt et al., EGU 2008 (1) Closure of Panama Seaway (2) Uplift of Rockies (3) Termination of Permanent El Nino (4) Decrease in CO 2 (5) Oribital variations The Causes of Northern Hemisphere Glaciation? 5 main hypotheses

Lunt et al., EGU 2008 Ice sheet model results…(2) Extent of cold orbit ice sheet

Lunt et al., EGU 2008 Conclusions Future Work / Implications Enhancement of Greenland glaciation in the late Pliocene driven by decrease in atmospheric CO 2 Greenland ice sheet waxed and waned on orbital timescales prior to 3 Ma. ENSO and tectonic forcing factors, with or without orbital trigger, did not play an important role in Greenland glaciation. Improvement of CO 2 records of the pre-ice core era. Improvement of IRD records in North Atlantic (including provenance). Need for transient model simulations (using fully coupled Earth System Models). Strong dependence on CO 2 has obvious implications for future ice sheet stability.