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footprintfigs

Jun-Aug 2002-2003 Sylvania NEE with wind direction, top – nighttime, NEE corrected to 15 C, 9 pm – 3 am CST, bottom – daytime NEE 10 am – 2 pm, gray line is 30 degree wind sector bin average NEE. Data is u* screened (0.3 cutoff).

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footprintfigs

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  1. Jun-Aug 2002-2003 Sylvania NEE with wind direction, top – nighttime, NEE corrected to 15 C, 9 pm – 3 am CST, bottom – daytime NEE 10 am – 2 pm, gray line is 30 degree wind sector bin average NEE. Data is u* screened (0.3 cutoff)

  2. Jun-Aug 2002-2003 Sylvania daytime aggregated flux footprint climatology, contours are logarithmic influence isopleths, landcover is Michigan Digital GIS Library, Landsat classified image 2001

  3. Jun-Aug 2002-2003 Sylvania nighttime aggregated flux footprint climatology, contours are logarithmic influence isopleths, landcover is Michigan Digital GIS Library, Landsat classified image 2001

  4. Jun-Aug 2002-2003 Sylvania 30-degree wind sector bin average footprint land cover influence - nighttime. Maximum mixed old-growth forest (hemlock / maple) and minimal water influence found in 180-270 degree sector

  5. Jun-Aug 2002-2003 Sylvania 30-degree wind sector bin average footprint land cover influence - daytime. Influence function mostly similar in wind directions – more old growth in SW, minimum in 0-90 sector. Daytime influenced by closer in sugar maple more than nighttime

  6. Jun-Aug 2002-2003 Sylvania bin average footprint influence land cover as a function of nighttime NEE (u* screened) normalized to 15 C. Low NEE values influenced more by water and deciduous.

  7. Jun-Aug 2002-2003 Sylvania bin average footprint influence land cover as a function of daytime NEE. Variability in footprint influence with NEE is minimal.

  8. Jun-Aug 2002-2003 Sylvania footprint influence landcover decomposed NEE as a function of deciduous sugar maple, mixed conifer-deciduous old-growth maple-hemlock and wetland.

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