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- W2174609135 abstract "Lengthening of the growing season at high latitudes, observed by satellites with the Normalized Difference Vegetation Index (NDVI), has been ascribed to climate warming. To test this assumption, and to verify whether changes in vegetation greenness are quantitative or qualitative, we experimentally warmed patches of High Arctic tundra with infrared heating in Northeast Greenland. By analyzing digital images of the vegetation, changes in cover were distinguished from changes in senescence. During the season, experimental warming significantly increased green cover, for example, at the time of peak cover, the total green cover was enhanced from 59.1 to 67.3%. The dominant wavelength (hue) reflected by our tundra plots shifted from yellow-green to yellow. Experimental warming with 2.5°C delayed this hue-shift by 15 d. The results demonstrate that higher summer temperatures do not only promote plant growth at these latitudes but also retard and/or postpone the senescence process, contrary to indications from previous research that late-season phenology in the High Arctic is governed by photoperiod." @default.
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- W2174609135 date "2004-11-01" @default.
- W2174609135 modified "2023-10-12" @default.
- W2174609135 title "Climate Warming Postpones Senescence in High Arctic Tundra" @default.
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- W2174609135 doi "https://doi.org/10.1657/1523-0430(2004)036[0390:cwpsih]2.0.co;2" @default.
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