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E. Linacre |
2/'99 |
The lower temperatures found at greater height mean that crops take longer to mature. Thus grain crops in Switzerland mature about 4.6 days later for each additional 100 metres elevation (1). The differences can be expressed in term of growing-degree days (Note 3.I).
(1) Pfister, C. 1981. The Little Ice Age. In Rotberg & Rabb 1981 (2), 87-116.
(2) Rotberg, I. & T.K. Rabb (eds) 1981. Climate & History. (Princeton Univ. Press) 280pp.