Inez Fung

Professor of Atmospheric Science
Department of Earth & Planetary Science
Department of Environmental Science, Policy and Management



Office:  399 McCone, 335 Hilgard


Mail Address: 

   307 McCone, Mail Code 4767

   University of California, Berkeley

   Berkeley, CA 94720-4767


Phone: 510.643.9367

Fax:     510.643.9980



Office Hours:  By appointment

Photo by Peg Skorpinski 2007


Fall 2011:      EPS 251  Carbon Cycle Dynamics

Spring 2012: EPS/IB 229  Introduction to Climate Modeling

Spring 2013: EPS 251  Carbon Cycle Dynamics


 Research Group




Academic Background | Honors | Research Interests | Selected Publications | Talks | Links |


A C A D E M I C   B A C K G R O U D

1977 Sc.D., Massachusetts Institute of Technology (Meteorology)
        Thesis: "The organization of spiral rainbands in a hurricane"
        Advisor: Prof. J.G. Charney

1971 S.B., Massachusetts Institute of Technology (Applied Mathematics)

RE S E A R C H    I N T E R E S T S

We study the interactions between climate change and biogeochemical cycles, and focus on the processes that maintain and alter the composition of the atmosphere, and hence the climate. 

A question driving my research is how will atmospheric CO2 and climate co-evolve, and what we can do about it. We continue to analyze atmospheric, land and ocean observations pertinent to the carbon cycle, and to synthesize them in atmospheric transport models to infer how CO2 sources and sinks have been changing.  We are also using the coupled carbon-climate model at NCAR to project how land and ocean carbon sinks will change with accelerating global warming and with human activities.  A not surprising finding is that the droughts have diminished, and will continue to diminish, the land uptake of CO2. 

Our group has taken several approaches towards the hydrologic cycle.  We have incorporated water isotopes into the NCAR atmospheric general circulation model to diagnose the water cycle.  Dust links the carbon cycle and the hydrologic cycle, as dust arises from (certain) arid regions, their deposition to the ocean stimulates marine productivity (at least for 1-2 weeks), and they reflect and absorb radiation.  To understand the life cycle of water itself and how plants both respond to and change the water in the soils, we have embarked on a new and exciting project – the HydroWatch Project  - to monitor and model water in the atmosphere, trees, soils, rock fractures and streams. Our first deployment (in October 2007) was at the Eel River at the Angelo Coast Reserve, one of the UC Natural Reserves.





2010:                          Elected Member, Academia Sinica (Taiwan)

2009-2010                Edward P. Bass Distinguished Visiting Environmental Scholar, Yale University

2009:                          Charney Lecture, American Geophysical Union Spring meeting, Toronto.

2009:                          Outstanding Mentor Award, Department of Energy

2009:                          Distinguished Faculty Mentoring Award, presented by the UC Berkeley Graduate Assembly

2007:                          Contributor to the 2007 Nobel Peace Prize awarded to the United Nations Environmental Programme (UNEP) Intergovernmental Panel for Climate Change (IPCC)

2007:                          National Center for Atmospheric Research (NCAR) Community Climate System Model (CCSM) Distinguished Achievement Award

2006:                          “Scientist of the Month  Ms. Maggie Owens’ 2nd grade class, Marin Elementary School, Albany, California

2006:                          Fellow, World Technology Network; Winner, 2006 World Technology Network Award for the Environment

2005:                          Scientific American 50, Scientific American

2004:                          Roger Revelle Medal, American Geophysical Union

2002:                          Henry W. Kendall Memorial Lecturer in Global Change Science, MIT

2001:                          Member, National Academy of Sciences

1997-2002:               Richard and Rhoda Goldman Distinguished Professor in the Physical Sciences, UC Berkeley

1996                           Fellow, American Geophysical Union

1994                           Fellow, American Meteorological Society

1992 - 1997              NASA Goddard Senior Fellow

1991                           NOAA Distinguished Authorship Award

1990, 1996               NASA Goddard Institute for Space Studies Most Valuable Paper Award

1989                           NASA Exceptional Scientific Achievement Medal

1987, 1993               NASA Goddard Institute for Space Studies Peer Award

1977                           C.G. Rossby Award for the outstanding thesis of the year, Department of Meteorology, MIT




S E L E C T E D    P U B L I C A T I O N S 


Climate Science and Climate Modeling


     Hydrologic Cycle and Climate


·      Swann, A., I. Fung and J.C.H. Chiang (2012).  Mid-latitude afforestation shifts general circulation and tropical precipitation.  Proceedings of the National Academy of Sciences of the USA, 109, 712-716.  doi: 10.1073/pnas.1116706108.

·      Swann, A., I. Fung, S. Levis, G. Bonan and S. Doney (2010).  Changes in Arctic vegetation amplify high-latitude warming through the greenhouse effect.  Proceedings of the National Academy of Sciences, USA, 107, 1295-1300.

·      Lee, JE, K. Johnson and I. Fung (2009). Precipitation over South America during the Last Glacial Maximum:  An analysis of the “amount effect” with a water isotope-enable general circulation model.  Geophys Res. Lett.,  doi:10.1029/2009GL039265

·      Lee JE, Fung I, DePaolo DJ and Otto-Bliesner, B (2008).  Water isotopes during the Last Glacial Maxima:  New GCM Calculations. J Geophys. Res.-Atmosphere, 113, doi:10.1029/2008JD009859.

·      Krakauer, N.Y. and I Fung (2008), Mapping and attribution of change in streamflow in the coterminous United States, Hydrology and Earth System Sciences, 5, 785-810.

·      Lee, J.-E., I. Fung, D. DePaolo and C.C. Henning (2007).  Analysis of the global distribution of water isotopes using the NCAR atmospheric general circulation model.  J. Geophys. Res., 112, doi:10.1029/2006JD007657.

·      Lee, J.-E., R. S. Oliveira, T. E. Dawson, and I. Fung, Root functioning modifies seasonal climate, Proceedings of the National Academy of Sciences of the United States of America, 102, 17576-17581, 2006.



     Modeling Carbon- Climate Interactions


·      Randerson, JR, FM Hoffman, PE Thornton, NM Mahowald, K Lindsay, YH Lee, CD Nevison, SC Doney, G Bonan, R Stockli, C Covey, SW Running, and IY Fung (2009).  Systematic assessment of terrestrial biogeochemistry in coupled climate-carbon models.  Global Change Biology, doi:10.1111/j.1365-2486.2009.01912.x.

·      Thornton, P.E. D. Doney, K. Lindsay, JK Moore, N. Mahowald, J Randerson, I Fung, JF Lamarque, J Feddema, YH Lee (2009).  Carbon-nitrogen interactions regulate climate-carbon cycle feedbacks:  results from an atmosphere-ocean general circulation model.  Biogeosciences, 6, 2099-2120.

·      Denman, K., G.P. Brasseur and others (2007). Coupling between changes in the climate system and biogeochemistry. Chapter 7 in "Climate Change 2007 - The Physical Science Basis".  edited by S. Solomon, D. Qin and others.  Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change.  Published by IPCC and Cambridge University Press.

·      Friedlingstein, P.,  P. Cox, R. Betts, L. Bopp, W. von Bloh, V. Brovkin, S. Doney, M. Eby, I. Fung, B. Govindasamy, J. John, C. Jones, F. Joos,  T. Kato, M. Kawamiya, W. Knorr, K. Lindsay, H. D. Matthews, T. Raddatz, P. Rayner, C. Reick, E. Roeckner, K.-G. Schnitzler, R. Schnur, K. Strassmann, S. Thompson, A. J.Weaver, C. Yoshikawa, and N. Zeng  (2006) Climate –carbon cycle feedback analysis, results from the C4MIP model intercomparison.  J. Climate 19(14):  3337-3353.

·      Doney, S.C., K. Lindsay, Fung, I., and J. John, Natural Variability in a Stable, 1000 Year Global Coupled Climate-Carbon Cycle Simulation, J. Climate, 19, 3033-3054, 2006.

·      Fung, I.Y., S.C. Doney, K. Lindsay, and J. John, Evolution of carbon sinks in a changing climate, Proceedings of the National Academy of Sciences of the United States of America, 102 (32), 11201-11206, 2005.


               Modeling Carbon- Climate Interactions


·      Stine AR, P. Huybers, and I. Fung (2009).  Changes in the phase of the annual cycle of surface temperature.  Nature, 457, 435-441, doi:10.1038/nature07675.

·      Goldstein, AH, CD Koven, C. Heald, and I. Fung (2009).  Biogenic carbon and anthropogenic pollution combine to form a cooling haze over the Southeast United States.  Proceedings of the National Academy of Sciences (USA),  doi:10.1073/pnas.0904128106.

·      Fung, I.  (2007).  Challenges of Climate Modeling.  Discrete and Continuous Dynamical Systems – Series B (DCDS-B), 7 (3), 543-551.



Carbon Cycle, Atmospheric Tracer Transport


Carbon Data Assimilation

§  Liu, J., I. Fung, E. Kalnay, J-S Kang, E.T. Olsen, and L. Chen (2012).  Simultaneous assimilation of AIRS XCO2 and meteorological observations in a carbon climate model with an ensemble Kalman filter.  J. Geophys. Res., 117. doi 10.1029/2011JD016642.

§  Liu, J., I. Fung, E. Kalnay and J-S Kang (2011).  CO2 transport uncertainties from the uncertainties in meteorological fields.  Geophys. Res. Lett., 38.  Doi: 10.1029/2011GL047213.

§  Kang, J.-S., E. Kalnay, J. Liu, I. Fung, T. Miyoshi, and K. Ide (2011), “Variable localization” in an ensemble Kalman filter: Application to the carbon cycle data assimilation, J. Geophys. Res., 116, D09110, doi:10.1029/2010JD014673.


Satellites for the carbon cycle

§  Miller, C. E.; Crisp, D.; DeCola, P. L.; Olsen, S. C.; Randerson, J. T.; Michalak, A. M.; Alkhaled, A.; Rayner, P.; Jacob, D. J.; Suntharalingam, P.; Jones, D. B. A.; Denning, A. S.; Nicholls, M. E.; Doney, S. C.; Pawson, S.; Boesch, H.; Connor, B. J.; Fung, I. Y.; O'Brien, D.; Salawitch, R. J.; Sander, S. P.; Sen, B.; Tans, P.; Toon, G. C.; Wennberg, P. O.; Wofsy, S. C.; Yung, Y. L.; Law, R. M. (2007), Precision requirements for space-based XCO2 data. Journal of Geophysical Research, 112 (D110), 10.1029/2006JD007659.

§  Schimel D, Fung I, DeFries R (2006).  Space-based ecological observations: the NASA decadal survey  FRONTIERS IN ECOLOGY AND THE ENVIRONMENT 4 (4): 171-171.

§  Crisp, D., R.M. Atlas, F.M. Breon, L.R. Brown, J.P. Burrows, P. Ciais, B.J. Connor, S.C. Doney, I.Y. Fung, D.J. Jacob, C.E. Miller, D. O'Brien, S. Pawson, J.T. Randerson, P. Rayner, R.J. Salawitch, S.P. Sander, B. Sen, G.L. Stephens, P.P. Tans, G.C. Toon, P.O. Wennberg, S.C. Wofsy, Y.L. Yung, Z. Kuang, B. Chudasama, G. Sprague, B. Weiss, R. Pollock, D. Kenyon, and S. Schroll, The orbiting carbon observatory (OCO) mission, in Trace Constituents in the Troposphere and Lower Stratosphere, pp. 700-709, 2004.


The changing carbon cycle

§  Buermann, W., Lintner, B.J., Koven, C.D., Angert, A., Pinzon, J., Tucker, C.J., and Fung, I.Y. (2007).  The changing carbon cycle at Mauna Loa Observatory.  Proceedings of the National Academy of Sciences (USA), 104 (11), 4249-4254.

§  Lintner, B., W. Buermann, C.D. Koven and I. Fung. Seasonal circulation and Mauna Loa CO2 Variability. J. Geophys Res.111, D13104, doi:10.1029/2005JD00653, 2006.

§  Patra PK, Gurney KR, Denning AS, Nakazawa T., Baker D, Bousquet P, Bruhwiler L, Chen YH, Ciais, P, Fan SM, Fung, I, Gloor, M, Heimann, M, Higuchi, K, John J, Law RM, Maki T, Pak BC, Peylin P, Prather M, Rayner PJ, Sarmiento J, Taguchi S, Takahashi T, Yuen CW (2006).  Sensitivity of inverse estimation of annual mean CO2 sources and sinks to ocean-only sites versus all-sites observational networks.  GEOPHYSICAL RESEARCH LETTERS 33 (5): Art. No. L05814.

§  Lintner, B., W. Buermann, C.D. Koven and I. Fung. Seasonal circulation and Mauna Loa CO2 Variability. J. Geophys Res.111, D13104, doi:10.1029/2005JD00653, 2006.

§  Angert, A., S. Biraud, C. Bonfils, C.C. Henning, W. Buermann, J. Pinzon, C.J. Tucker, and I. Fung, Drier summers cancel out the CO2 uptake enhancement induced by warmer springs, Proceedings of the National Academy of Sciences of the United States of America, 102 (31), 10823-10827, 2005.

§  Angert, A., S. Biraud, C. Bonfils, W. Buermann, and I. Fung, CO2 seasonality indicates origins of post-Pinatubo sink, Geophysical Research Letters, 31 (11), doi:10.1029/2004GL019760, 2004.

§  Gurney, K.R., R.M. Law, A.S. Denning, P.J. Rayner, B.C. Pak, D. Baker, P. Bousquet, L. Bruhwiler, Y.H. Chen, P. Ciais, I.Y. Fung, M. Heimann, J. John, T. Maki, S. Maksyutov, P. Peylin, M. Prather, and S. Taguchi, Transcom 3 inversion intercomparison: Model mean results for the estimation of seasonal carbon sources and sinks, Global Biogeochemical Cycles, 18 (1), 2004.


Inferences about terrestrial carbon processes

§  Bonfils, C., A. Angert, C.C. Henning, S. Biraud, S.C. Doney, and I. Fung, Extending the record of photosynthetic activity in the eastern United States into the presatellite period using surface diurnal temperature range, Geophysical Research Letters, 32 (8), doi:10.1029/2005GL022583, 2005.

§  Bonfils, C., I. Fung, S. Doney, and J. John, On the detection of summertime terrestrial photosynthetic variability from its atmospheric signature, Geophysical Research Letters, 31 (9), 2004.

§  Still, C.J., J.T. Randerson, and I.Y. Fung, Large-scale plant light-use efficiency inferred from the seasonal cycle of atmospheric CO2, Global Change Biology, 10 (8), 1240-1252, 2004.


Atmospheric processes

§  Hoag, K.J., C.J. Still, I.Y. Fung, and K.A. Boering, Triple oxygen isotope composition of tropospheric carbon dioxide as a tracer of terrestrial gross carbon fluxes, Geophysical Research Letters, 32 (2), 2005.

§  Lintner, B.R., A.B. Gilliland, and I.Y. Fung, Mechanisms of convection-induced modulation of passive tracer interhemispheric transport interannual variability, Journal of Geophysical Research-Atmospheres, 109 (D13), 2004.


Dust, Iron and Marine Productivity


§  Boyd PW, Doney SC, Strzepek R, Dusenberry J, Lindsay K, and Fung I (2008). Climate-mediated changes to mixed-layer properties in the Southern Ocean: assessing the phytoplankton response.  Biogeosciences, 5, 847-864.

§  Koven, C.D. and I. Fung (2008).  Identifying global dust source areas using high-resolution land surface form.  Journal Geophysical Researh – Atmospheres, 113, article number D22204.   

§  Koven C. D., I. Fung (2006), Inferring dust composition from wavelength-dependent absorption in Aerosol Robotic Network (AERONET) data, J. Geophys. Res., 111, D14205, doi:10.1029/2005JD006678.

§  Lam, P.J., J.K.B. Bishop, C. C. Henning, M. A. Marcus, G. Waychunas, and I. Fung (2006). Wintertime phytoplankton bloom in the Subarctic Pacific supported by continental margin iron. Global Biogeochem Cycles, 20(1), GB1006, doi: 10.1029/2005GB002557.

§  Hand, J.L., N.M. Mahowald, Y. Chen, R.L. Siefert, C. Luo, A. Subramaniam, and I. Fung, Estimates of atmospheric-processed soluble iron from observations and a global mineral aerosol model: Biogeochemical implications, Journal of Geophysical Research-Atmospheres, 109 (D17), 2004.

§  Moore, J.K., S.C. Doney, D.M. Glover, and I.Y. Fung, Iron cycling and nutrient-limitation patterns in surface waters of the World Ocean, Deep-Sea Research Part Ii-Topical Studies in Oceanography, 49 (1-3), 463-507, 2002a.

§  Moore, J.K., S.C. Doney, J.A. Kleypas, D.M. Glover, and I.Y. Fung, An intermediate complexity marine ecosystem model for the global domain, Deep-Sea Research Part Ii-Topical Studies in Oceanography, 49 (1-3), 403-462, 2002b.


S E L E C T E D   T A L K S

         Global Warming Mathematical Sciences Research Institute Symposium, San Francisco, April 11 2007

         Climate Modeling  SIAM Meeting, San Diego, January 2008

         Mathematical Challenges in Climate Change Science.  2010 SIAM Annual Meeting, Pittsburg

         Anatomy of a Climate Model:  How Robust are Climate Projections?  GoogleTechTalk, February 11 2011



Climate Change and the Supreme Court  April 2007.   


My Home Departments
 Department of Earth and Planetary Science, UC Berkeley
 Department of Environmental Science, Policy and Management, UC Berkeley


Visualizing and Analyzing Climate and CO2 Data


§                                                               library

§                    gridded  Goddard satellite data and MERRA reanalysis data

§     analysis of NCEP data

§      analysis of NCEP data

§                                 North American Regional Reanalysis; 25 km, 3-hourly.

§ download NCEP reanalysis data

§                                                            up-to-date NOAA climate forecasts


§                                    Fossil Fuel CO2 emissions:  global, regional and national (and US States) time series, including 13C/12C





Dynamics of Climate:  The Proceedings of a Conference on the Application of Numerical Integration Techniques to the Problem of the General Circulation, held October 26-28, 1955.Richard L. Pfeffer (editor). 

      The conference was held after the first successful numerical weather forecast experiment using the ENIAC.  The book includes comments by von Neumann and Oppenheimer, and articles by Charney, Phillips, Pfeffer, Mintz, Eliassen, Smagorinsky, Starr, Benton, Bjerknes,  Fultz, Kuo, Lorenz, Wexler, Fritz, Kaplan, and King.


Hansen et al. (1984). Climate Sensitivity: Analysis of Feedback Mechanisms in Climate Processes and Climate Sensitivity.  J.E. Hansen and T Takahashi (editors).  Geophysical Monograph 29, Maurice Ewing Volume 5.  American Geophysical Union.


All of Ed Lorenz’s publications, some of his lectures, autobiographic works are here: