The footprint of urban climates on vegetation phenology

Details The footprint of urban climates on vegetation phenology The footprint of urban climates on vegetation phenology

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3112209z&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 12, CiteID L12209

Mathematics

Logic

4

Atmospheric Composition And Structure: Biosphere/Atmosphere Interactions, Atmospheric Composition And Structure: Geochemical Cycles, Global Change: Biogeochemical Processes (4805), Global Change: Climate Dynamics (3309), Global Change: Remote Sensing

Scientific paper

Human activity, through changing land use and other activities, is the most fundamental source of environmental change on the Earth. Urbanization and the resultant ``urban heat islands'' provide a means for evaluating the effect of climate warming on vegetation phenology. Using data from the Moderate Resolution Imaging Spectroradiometer, we analyzed urban-rural differences in vegetation phenological transition dates and land surface temperatures for urban areas larger than 10 km2 in eastern North America. The results show that the effect of urban climates on vegetation phenology decays exponentially with distance from urban areas with substantial influence up to 10 km beyond the edge of urban land cover, and that the ecological ``footprint'' of urban climates is about 2.4 times that of urban land use in eastern North America. The net effect is an increase in the growing season by about 15 days in urban areas relative to adjacent unaffected rural areas.

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