Warm Season Land Surface — Climate Interactions in the United States Midwest from Mesoscale Observations
The United States Midwest over the last two decades has experienced marked warm season climate anomalies, including droughts and major floods. While the development of these extreme events can usually be traced to anomalies in atmospheric circulation, and may include teleconnections, studies based on model simulations have shown that land surface forcing may be partly responsible for the persistence of these climate anomalies. This study evaluates the presence and strength of long-term land surface-climate interactions in the U.S. Midwest. We do this via an analysis of the cross-seasonal (spring and summer) associations between temperature and moisture (Palmer Drought Severity Index-PDSI, Crop Moisture-Z Index, and precipitation) anomalies. Direct and lag correlations for the 1895–1995 and 1948–1995 periods show that warm and dry summers tend to follow warm spring seasons. These results imply that springtime precipitation anomalies may help to determine the temperature regime of the following summer, possibly via the moisture content of the upper soil. We also show that broad land cover types tend to modulate summer climate anomalies in the U. S. Midwest.
KeywordsLand Surface Land Cover Type Climate Anomaly Climate Division National Climatic Data Center
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- Anderson, J.R., Hardy, E.E., Roach, J.T. and Witmer, R. E., (1976). ‘A land use and land cover classification system for use with remote sensing data’ U.S. Geological Survey Professional Paper, 964, 28p.Google Scholar
- Arnold, D.L., (1994). Synoptic and Mesoscale Climatologies of Severe Local Storms for the American Midwest Ph.D. dissertation, Dept. of Geography, Indiana University, Bloomington. 257p.Google Scholar
- Betts, A. K., Hall, J.H., Beljaars, A.C.M., Miller, M.J., and Viterbo, P.A., (1994). ‘Coupling between land surface boundary layer parameterizations and rainfall on local and regional scales: Lessons from the wet summer of 1993’ Preprints, Fifth Symp. On Global Change Studies, Nashville, Amer. Meteor. Soc., 174–181Google Scholar
- Changnon, S.A. and Kunkel, K.E., (1992). ‘Assessing impacts of a climatologically unique year (1990) in the Midwest’ Phys. Geog., 13, 180–190.Google Scholar
- Goutorbe, J.-P., Noilhan, J., Valancogne, C. and Cuenca, R.H., (1989). ‘Soil moisture variations during HAPEX-MOBILHY’ Annals. Geophysics., 7, 415–425.Google Scholar
- Lott, N., (1993). ‘The summer of 1993: Flooding in the Midwest and drought in the Southeast’ National Climatic Data Center Research Customer Service Group Technical Report, 93–04. 21 p.Google Scholar
- McNab, A. L., (1989). ‘Climate and drought’ EOS, Transactions of the American Geophysics Union, 70, 882–883.Google Scholar
- Namias, J., (1960). ‘Factors in the initiation, perpetuation and termination of drought’ Extract of Publ. No. 51, IASH Commission of Surface Waters, 81–94. [Avail. from IASH, UNESCO, Paris].Google Scholar
- Pielke, R.A., Dalu, G.A., Lee, T.J., Rodriguez, H., Eastman, J. and Kittel, T.G.F., (1993). ‘Mesoscale parameterization of heat fluxes due to landscape variability for use in general circulation models, In: Exchange Processes at the Land Surface for a Range of Space and Time Scales (Proc. of the Yokohama Symp., July 1993). IAHS Publ. No. 212. 331–342.Google Scholar
- Sellers, P.J., Hall, F.G., Asrar, G., Strebel, D.E., and Murphy, R.E., (1992) ‘An overview of the First International Satellite Land Surface Climatology Project (ISLSCP) Field Experiment (FIFE)’ Journal of Geophysical Research, 97, 18,345–18.Google Scholar
- Sellers, P.J., Hall, F.G., Asrar, G., Strebel, D.E., and Murphy, R.E., (1992) ‘An overview of the First International Satellite Land Surface Climatology Project (ISLSCP) Field Experiment (FIFE)’ Journal of Geophysical Research, 97, 18,371.Google Scholar
- Travis, D.J., (1997). ‘An investigation of Wisconsin’s anthropogenically-generated convergence boundary and possible influences on climate’ Wisconsin Geogr., 12, 34–46.Google Scholar