Papers on Climate and Atmospheric Physics
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Model assessment of regional surface temperature trends (1949–1997)
T. R. Knutson,
T. L. Delworth,
K. W. Dixon,
R. J. Stouffer,
T. R. Knutson
Search for more papers by this authorT. L. Delworth
Search for more papers by this authorK. W. Dixon
Search for more papers by this authorR. J. Stouffer
Search for more papers by this author
T. R. Knutson,
T. L. Delworth,
K. W. Dixon,
R. J. Stouffer,
T. R. Knutson
Search for more papers by this authorT. L. Delworth
Search for more papers by this authorK. W. Dixon
Search for more papers by this authorR. J. Stouffer
Search for more papers by this authorAbstract
Analyses are conducted to assess whether simulated trends in SST and land surface air temperature from two versions of a coupled ocean-atmosphere model are consistent with the geographical distribution of observed trends over the period 1949–1997. The simulated trends are derived from model experiments with both constant and time-varying radiative forcing. The models analyzed are low-resolution (R 15, ∼4°) and medium-resolution (R30, ∼2°) versions of the Geophysical Fluid Dynamics Laboratory (GFDL) coupled climate model. Internal climate variability is estimated from long control integrations of the models with no change of external forcing. The radiatively forced trends are based on ensembles of integrations using estimated past concentrations of greenhouse gases and direct effects of anthropogenic sulfate aerosols (G+S). For the regional assessment, the observed trends at each grid point with adequate temporal coverage during 1949–1997 are first compared with the R15 and R30 model unforced internal variability. Nearly 50% of the analyzed areas have observed warming trends exceeding the 95th percentile of trends from the control simulations. These results suggest that regional warming trends over much of the globe during 1949–1997 are very unlikely to have occurred due to internal climate variability alone and suggest a role for a sustained positive thermal forcing such as increasing greenhouse gases. The observed trends are then compared with the trend distributions obtained by combining the ensemble mean G+S forced trends with the internal variability “trend” distributions from the control runs. Better agreement is found between the ensemble mean G+S trends and the observed trends than between the model internal variability alone and the observed trends. However, the G+S trends are still significantly different from the observed trends over about 30% of the areas analyzed. Reasons for these regional inconsistencies between the simulated and the observed trends include possible deficiencies in (1) specified radiative forcings, (2) simulated responses to specified radiative forcings, (3) simulation of internal climate variability, or (4) observed temperature records.
References
- Alexander, M. A., Simulation of the response of the North Pacific Ocean to the anomalous atmospheric circulation associated with El Niño, Clim. Dyn., 5, 53–65, 1990.
- Barnett, T. P., G. C. Hegerl, B. Santer, K. Taylor, The potential effect of GCM uncertainties and internal atmospheric variability on anthropogenic signal detection, J. Clim., 11, 659–675, 1998.
- Barnett, T. P., D. W. Pierce, M. Latif, D. Dommenget, R. Saravanan, Interdecadal interactions between the tropics and midlatitudes in the Pacific basin, Geophys. Res. Lett., 26, 615–618, 1999.
- Barnett, T. P., M. E. Schlesinger, Detecting changes in global climate induced by greenhouse gases, J. Geophys. Res., 92, 14722–14780, 1987.
- Bell, T. L., Optimal weighting of data to detect climatic change: Application to the carbon dioxide problem, J. Geophys. Res., 87, 11161–11170, 1982.
- Bell, T. L., Theory of optimal weighting of data to detect climatic change, J. Atmos. Sci., 43, 1694–1710, 1986.
- Bloomfield, P., Trends in global temperature, Clim. Change, 21, 1–16, 1992.
- Delworth, T. L., North Atlantic interannual variability in a coupled ocean-atmosphere model, J. Clim., 9, 2356–2375, 1996.
- Delworth, T., S. Manabe, The influence of soil wetness on near-surface atmospheric variability, J. Clim., 2, 1447–1462, 1989.
- Deser, C., M. L. Blackmon, On the relationship between Tropical and North Pacific sea surface temperature variations, J. Clim., 8, 1677–1680, 1995.
- Deser, C., M. A. Alexander, M. S. Timlin, Upper-ocean thermal variations in the North Pacific during 1970–1991, J. Clim., 9, 1840–1855, 1996.
- Dixon, K. W., J. R. Lanzante, Global mean surface air temperature and North Atlantic overturning in a suite of coupled GCM climate change experiments, Geophys. Res. Lett., 26, 1885–1888, 1999.
- Ghil, M., R. Vautard, Interdecadal oscillations and the warming trend in global temperature time series, Nature, 350, 324–327, 1991.
- Graham, N. E., Decadal-scale climate variability in the tropical and North Pacific during the 1970s and 1980s: Observations and model results, Clim. Dyn., 10, 135–162, 1994.
- Hansen, J., et al., Forcings and chaos in interannual to decadal climate change, J. Geophys. Res., 102, 25679–25720, 1997.
- Hasselmann, K., On the signal-to-noise problem in atmospheric response studies, Meteorology Over the Tropical Oceans D. B. Shaw, 251–259, R. Meteorol. Soc., 1979.
- Haywood, J. M., R. J. Stouffer, R. T. Wetherald, S. Manabe, V. Ramaswamy, Transient response of a coupled model to estimated changes in greenhouse gas and sulfate concentrations, Geophys. Res. Lett., 24, 1335–1338, 1997.
- Hegerl, G. C., K. Hasselmann, U. Cubasch, J. F. B. Mitchell, E. Roeckner, R. Voss, J. Waszkewitz, Multi-fingerprint detection and attribution analysis of greenhouse gas, greenhouse gas-plus-aerosol and solar forced climate change, Clim. Dyn., 13, 613–634, 1997.
- , Intergovernmental Panel on Climate Change (IPCC), Climate Change 1992: The Supplementary Report to the IPCC Scientific Assessment J. T. Houghton, B. A. Callender, S. K. Varney, WMO/ UNEP, Cambridge Univ. Press, New York, 1992.
- Johns, T. C., R. E. Carnell, J. F. Crossley, J. M. Gregory, J. F. B. Mitchell, C. A. Senior, S. F. B. Tett, R. A. Wood, The second Hadley Centre coupled ocean-atmosphere GCM: Model description, spinup and validation, Clim. Dyn., 13, 103–134, 1997.
- Jones, P. D., Hemispheric surface air temperature variations: A reanalysis and an update to 1993, J. Clim., 7, 1794–1802, 1994.
- Jones, P. D., G. C. Hegerl, Comparisons of two methods of removing anthropogenically related variability from the near-surface observational temperature field, J. Geophys. Res., 103, 13777–13786, 1998.
- Kachi, M., T. Nitta, Decadal variations of the global atmosphere-ocean system, J. Meteorol. Soc. Jpn., 75, 657–675, 1997.
- Kaplan, A., M. A. Cane, Y. Kushnir, A. Clement, M. Blumenthal, B. Rajagopalan, Analyses of global sea surface temperature 1856–1991, J. Geophys. Res., 103, 18567–18589, 1998.
- Karoly, D. J., J. A. Cohen, G. A. Meehl, J. F. B. Mitchell, A. H. Oort, R. J. Stouffer, R. T. Wetherald, An example of fingerprint detection of greenhouse climate change, Clim. Dyn., 10, 97–105, 1994.
- Kim, K. Y., G. R. North, Regional simulations of greenhouse warming including natural variability, Bull. Am. Meteorol. Soc., 76, 2171–2178, 1995.
- Knutson, T. R., S. Manabe, Model assessment of decadal variability and trends in the tropical Pacific Ocean, J. Clim., 11, 2273–2296, 1998.
- Knutson, T. R., S. Manabe, D. Gu, Simulated ENSO in a global coupled ocean-atmosphere model: Multidecadal amplitude modulation and CO2 sensitivity, J. Clim., 10, 138–161, 1997.
- Latif, M., T. P. Barnett, Decadal climate variability over the North Pacific and North America: Dynamics and predictability, J. Clim., 9, 2407–2423, 1996.
- Lau, N.-C., M. J. Nath, The role of the “atmospheric bridge” in linking tropical Pacific ENSO events to extratropical SST anomalies, J. Clim., 9, 2036–2057, 1996.
- Lau, N.-C., S. G. H. Philander, M. J. Nath, Simulation of ENSO-like phenomena with a low-resolution coupled GCM of the global ocean and atmosphere, J. Clim., 5, 284–307, 1992.
- Leroy, S. S., Detecting climate signals: Some Bayesian aspects, J. Clim., 11, 640–651, 1998.
- Livezey, R. E., W. Y. Chen, Statistical field significance and its determination by Monte Carlo techniques, Mon. Weather Rev., 111, 46–59, 1983.
- Manabe, S., R. J. Stouffer, Low-frequency variability of surface air temperature in a 1000-year integration of a coupled atmosphere-oceanland surface model, J. Clim., 9, 376–393, 1996.
- Manabe, S., R. J. Stouffer, M. J. Spelman, K. Bryan, Transient response of a coupled ocean-atmosphere model to gradual changes of atmospheric CO2, part I, Annual mean response, J. Clim., 4, 785–818, 1991.
- Mann, M. E., R. S. Bradley, M. K. Hughes, Global-scale temperature patterns and climate forcing over the past six centuries, Nature, 392, 779–787, 1998.
- Meehl, G. A., J. M. Arblaster, W. G. Strand Jr., Global scale decadal climate variability, Geophys. Res. Lett., 25, 3983–3986, 1998.
- Miller, A. J., D. R. Cayan, T. P. Barnett, N. E. Graham, J. M. Oberhuber, Interdecadal variability of the Pacific Ocean: Model response to observed heat flux and wind stress anomalies, Clim. Dyn., 10, 135–162, 1994.
- Mitchell, J. F. B., T. C. Johns, J. M. Gregory, S. F. B. Tett, Climate response to increasing levels of greenhouse gases and sulfate aerosols, Nature, 376, 501–504, 1995.
- Nakamura, H., G. Lin, T. Yamagata, Decadal climate variability in the North Pacific during recent decades, Bull. Am. Meteorol. Soc., 78, 2215–2225, 1997.
- Nicholls, N., G. V. Gruza, J. Jouzel, T. R. Karl, L. A. Ogallo, D. E. Parker, Observed climate variability and change, Climate Change 1995: The Science of Climate Change J. T Houghton, L. G. Meira Filho, B. A. Callander, N. Harris, A. Kattenberg, K. Maskell, Cambridge Univ. Press, New York, 1996.
- North, G. A., K.-Y. Kim, S. S. P. Shen, J. W. Hardin, Detection of forced climate signals, part I, Filter theory, J. Clim., 8, 401–408, 1995.
- North, G. A., M. J. Stevens, Detecting climate signals in the surface temperature record, J. Clim., 11, 563–577, 1998.
- Pacanowski, R., K. Dixon, A. Rosati, The GFDL Modular Ocean Model Users Guide version 1GFDL Ocean Group Tech. Rep. 2NOAA/Geophys. Fluid Dyn. Lab., Princeton, N.J., 1991.
- Parker, D. E., P. D. Jones, A. Bevan, C. K. Folland, Interdecadal changes of surface temperature since the late 19th century, J. Geophys. Res., 99, 14,373–14,399, 1994.
- Parker, D. E., C. K. Folland, M. Jackson, Marine surface temperature: Observed variations and data requirements, Clim. Change, 31, 559–600, 1995.
- Rayner, N. A., E. B. Horton, D. E. Parker, C. K. Folland, R. B. Hackett, Version 2.2 of the global sea-ice and sea surface temperature data set, 1903–1994, Clim. Res. Tech. Note, 74, Hadley Centre for Clim. Pred. and Res., Met. Office, Bracknell, U.K., 1996.
- Santer, B. D., et al., A search for human influences on the thermal structure of the atmosphere, Nature, 382, 39–46, 1996a.
- Santer, B. D., K. E. Taylor, T. M. L. Wigley, J. E. Penner, P. D. Jones, U. Cubasch, Towards the detection and attribution of an anthropogenic effect on climate, Clim. Dyn., 12, 77–100, 1995.
- Santer, B. D., T. M. L. Wigley, T. P. Barnett, E. Anyamba, Detection of climate change and attribution of causes, Climate Change 1995: The Science of Climate Change J. T. Houghton, L. G. Meira Filho, B. A. Callander, N. Harris, A. Kattenberg, K. Maskell, Cambridge Univ. Press, New York, 1996b.
- Santer, B. D., T. M. L. Wigley, P. D. Jones, Correlation methods in fingerprint detection studies, Clint. Dyn., 8, 265–276, 1993.
- Schimel, D., et al., Radiative forcing of climate change, Climate Change 1995: The Science of Climate Change J. T Houghton, L. G. Meira Filho, B. A. Callander, N. Harris, A. Kattenberg, K. Maskell, Cambridge Univ. Press, New York, 1996.
- Schlesinger, M. E., N. Ramankutty, An oscillation in the global climate system of period 65–70 years, Nature, 367, 723–726, 1994.
- Smith, T. M., R. W. Reynolds, R. E. Livezey, D. C. Stokes, Reconstruction of historical sea surface temperatures using empirical orthogonal functions, J. Clim., 9, 1403–1420, 1996.
- Stott, P. A., S. F. B. Tett, Scale-dependent detection of climate change, J. Clim., 11, 3282–3294, 1998.
- Stouffer, R. J., S. Manabe, K. Y. Vinnikov, Model assessment of the role of natural variability in recent global warming, Nature, 367, 634–636, 1994.
- Tett, S. F. B., J. F. B. Mitchell, D. E. Parker, M. R. Allen, Human influence on the atmospheric vertical structure: Detection and observations, Science, 274, 1170–1173, 1996.
- Tett, S. F. B., P. A. Stott, M. R. Allen, W. J. Ingram, J. F. B. Mitchell, Causes of twentieth-century temperature changes near the Earth's surface, Nature, 399, 569–572, 1999.
- Trenberth, K. E., Recent observed interdecadal climate changes in the Northern Hemisphere, Bull. Am. Meteorol. Soc., 71, 988–993, 1990.
- Trenberth, K. E., T. J. Hoar, The 1990–1995 El Nino-Southern Oscillation event: Longest on record, Geophys. Res. Lett., 23, 57–60, 1996.
- Trenberth, K. E., J. W. Hurrell, Decadal atmosphere-ocean variations in the Pacific, Clim. Dyn., 9, 303–319, 1994.
- Vinnikov, K. Y., A. Robock, R. J. Stouffer, S. Manabe, Vertical patterns of free and forced climate variations, Geophys. Res. Lett., 23, 1801–1804, 1996.
- White, W. B., D. R. Cayan, Quasi-periodicity and global symmetries in interdecadal upper ocean temperature variability, J. Geophys. Res., 103, 21335–21354, 1998.
- Wigley, T. M. L., S. C. B. Raper, Natural variability of the climate system and detection of the greenhouse effect, Nature, 344, 324–327, 1990.
- Wigley, T. M. L., P. J. Jaumann, B. D. Santer, K. E. Taylor, Relative detectability of greenhouse-gas and aerosol climate change signals, Clim. Dyn., 14, 781–790, 1998.
- Zhang, R.-H., S. Levitus, Structure and cycle of decadal variability of upper-ocean temperature in the North Pacific, J. Clim., 10, 710–727, 1997.
- Zhang, Y., J. M. Wallace, D. S. Battistsi, ENSO-like interdecadal variability: 1900–93, J. Clim., 10, 1004–1020, 1997.
