University of California Press

Figure 4

$(a) CO2 (b) O3 (c) NO (d) NO2 Data over a 20-day period (DOY 52 to 72), when snow depth was relatively stable (∼50 cm), were used to calculate the mean mole fractions and the ±1 s.d. (x-error bar) from each height in the snowpack$

Trace gas profiles in the snowpack by study plot.

(a) CO₂ (b) O₃ (c) NO (d) NO₂ Data over a 20-day period (DOY 52 to 72), when snow depth was relatively stable (∼50 cm), were used to calculate the mean mole fractions and the ±1 s.d. (x-error bar) from each height in the snowpack

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