Page 73

Conrad, V., and C. Pollak, 1950. Methods in Climatology, Harvard University Press, Cambridge, Mass., 459 pp.

Cryer, J. D., 1996. Time Series Analysis. Duxbury Press, 286 pp.

Dai, A., K. E. Trenberth, T. R. Karl, 1999. Effects of clouds, soil moisture, precipitation, and water vapor on diurnal temperature range. J. Climate 12, 2451–2473.

De la Mare, W. K., 1997. Abrupt mid-twentieth-century decline in Antarctic sea-ice extent from whaling records. Nature 389, 57–60.

Diaz, H. F. and N. E. Graham, 1996. Recent changes in tropical freezing heights and the role of sea surface temperature. Nature 383, 152–155.

Easterling, D. R., B. Horton, P. D. Jones, T. C. Peterson, T. R. Karl, D. E. Parker, M. J. Salinger, V. Razuvaev, N. Plummer, P. Jamason, and C. K. Folland, 1997. Maximum and minimum temperature trends for the globe. Science 277, 364–367.

Folland, C. K., and D. E. Parker, 1995. Correction of instrumental biases in historical sea surface temperature data. Quart. J. Roy. Meteorol. Soc. 121, 319–367.

Folland, C. K., D. M. H. Sexton, D. J. Karoly, C. E. Johnson, D. P. Rowell, and D. E. Parker, 1998. Influences of anthropogenic and oceanic forcing on recent climate change. Geophys. Res. Lett. 25, 353–356.

Gaffen, D. J., 1993. Historical changes in radiosonde instruments and practices. WMO Instruments and Observing Methods Report No. 50, WMO/TD No. 541, World Meteorological Organization, Geneva, 123 pp.

Gaffen, D. J., 1994. Temporal inhomogeneities in radiosonde temperature records. J. Geophys. Res. 99, 3667–3676.

Gaffen, D. J., 1996. A digitized metadata set of global upper-air station histories, NOAA Technical Memorandum ERL-ARL 211, Silver Spring, MD, 38 pp.

Gaffen, D. J., W. P. Elliott, and A. Robock, 1992. Relationships between tropospheric water vapor and surface temperature as observed by radiosondes. Geophys. Res. Lett. 19, 1839–1842.

Gaffen, D. J., M. A. Sargent, R. E. Habermann, and J. R. Lanzante, 2000. Sensitivity of tropospheric and stratospheric temperature trends to radiosonde data quality. J Climate (in press).

Gaffen, D. J., B. D. Santer, J. S. Boyle, J. R. Christy, N. E. Graham, and R. J. Ross, in review. Multi-decadal changes in the vertical temperature structure of the tropical troposphere. Science.

Gullett, D. W., L. Vincent, and P. J. F. Sajecki, 1990. Testing for Homogeneity in Temperature Time Series at Canadian Climate Stations. CCC Report No. 90-4. Atmospheric Environment Service, Downsview, Ontario. 43 pp.

Gutzler, D., 1992. Climatic variability of temperature and humidity over the tropical western Pacific. Geophys. Res. Lett. 19, 1595–1598.break