The urban sites,however, were associated with a generally lower variation of O3 (see Table 2). An example for the spatial variability of O3 along with the onset date of flowering of birch and the corresponding temperatures can be seen in Fig. S1.
The urban sites,however, were associated with a generally lower variation of O3(see Table 2). An example for the spatial variability of O3 along withthe onset date of flowering of birch and the corresponding temperaturescan be seen in Fig. S1.