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    Author(s): D.Y. Hollinger; S.V. Ollinger; A.D. Richardson; T.P. Meyers; D.B. Dails; M.E. Martin; N.A. Scott; T.J. Arkebauer; D.D. Baldocchi; K.L. Clark; P.S. Curtis; K.J. Davis; A.R. Desai; D. Dragoni; M.L. Goulden; L. Gu; G.G. Katul; S.G. Pallardy; K.T. Paw U; H.P. Schmid; P.C. Stoy; A.E. Suyker; S.B. Verma
    Date: 2010
    Source: Global Change Biology. 16: 696-710.
    Publication Series: Scientific Journal (JRNL)
    Station: Northern Research Station
    PDF: View PDF  (571.87 KB)

    Description

    Vegetation albedo is a critical component of the Earth’s climate system, yet efforts to evaluate and improve albedo parameterizations in climate models have lagged relative to other aspects of model development. Here, we calculated growing season albedos for deciduous and evergreen forests, crops, and grasslands based on over 40 site-years of data from the AmeriFlux network and compared them with estimates presently used in the land surface formulations of a variety of climate models. Generally, the albedo estimates used in land surface models agreed well with this data compilation. However, a variety of models using fixed seasonal estimates of albedo overestimated the growing season albedo of northerly evergreen trees. In contrast, climatemodels that rely on a common two-stream albedo submodel provided accurate predictions of boreal needle-leaf evergreen albedo but overestimated grassland albedos.

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    Citation

    Hollinger, D.Y.; Ollinger, S.V.; Richardson, A.D.; Meyers, T.P.; Dails, D.B.; Martin, M.E.; Scott, N.A.; Arkebauer, T.J.; Clark, K.L. 2010. Albedo estimates for land surface models and support for a new paradigm based on foliage nitrogen concentration. Global Change Biology. 16(2): 696-710.

    Keywords

    albedo, nitrogen, vegetation

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