Table S1. Detailed information about tree bark samples
Site / Latitude (N, º) / Longitude (E, º) / Temperature(℃) / Predominant wind direction / Description of the sampling site
1 / 31.367 / 121.002 / 27-34 / SE / Located at the roadside in the Development zone, Kunshan
2 / 31.362 / 120.864 / 27-34 / SE / Located in a small wood at the riverside in Tianrui industrial park, Kunshan
3 / 31.487 / 120.812 / 28-35 / SE / Located in an agriculture village in Yangchenghu Lake, Suzhou.
4 / 31.371 / 120.641 / 28-35 / SE / Located in a garden of an office building in Xiangcheng district, Suzhou
5 / 31.526 / 120.664 / 28-35 / SE / Located in suburbanarea between Suzhou and Changshu, close to a highway.
6 / 31.671 / 120.751 / 27-34 / SE / Located in the city center near a road with heavy traffic and commercial activities in the Environmental monitoring station of Changshu
7 / 31.755 / 120.934 / 27-34 / SE / Located inside a garden in a street with less vehicles in Development zone, Changshu
8 / 31.863 / 120.949 / 27-34 / SE / Located in a crossroad in Development zone, Nantong
9 / 31.927 / 120.938 / 26-34 / SE / Located in a crossroad in a residential area named Xinghu garden, where several chemical factories are not far from it, Nantong
10 / 31.967 / 120.905 / 26-34 / SE / Inside a garden named Seyuan 400m away from a busy road in the suburban of Nantong
11 / 32.006 / 120.854 / 26-34 / SE / Located in the city center in Environmental monitoring station of Nantong
12 / 32.048 / 120.994 / 26-34 / SE / Located in an agriculture village near a road with light traffic in Jinsha town, Nantong
13 / 32.103 / 120.744 / 26-34 / SE / Located in an agriculture village in the suburban of Pingchao town,Nantong
14 / 31.880 / 120.548 / 27-35 / SE / Located in a residential area in the city center ofZhangjiagang
15 / 31.971 / 120.639 / 27-35 / SE / The area is not far from a steel plant named Shagang in Jinfeng town,Zhangjiagang
16 / 31.903 / 120.281 / 27-36 / SE / Located in a residential area in the city center of Jiangyin
17 / 31.685 / 120.294 / 28-36 / SE / Located in a residential area near a road with heavy traffic and commercial activities in Huishan district, Wuxi
18 / 31.402 / 120.227 / 28-36 / SE / Located at the side of Taihu lake,Shazhu, Wuxi, the area used to be farmland, now is green area.
19 / 31.560 / 120.295 / 28-36 / SE / Located in a residential area in the city center near a road with heavy traffic and commercial activities in the Environmental monitoring station, Wuxi
20 / 31.586 / 120.349 / 28-36 / SE / Located at Xishan district, Wuxi
21 / 31.553 / 120.431 / 28-36 / SE / Located at the roadside in the suburban of Meicun town, Wuxi city andclose to some textile factories
22 / 31.514 / 120.506 / 28-36 / SE / Located at the roadside near Hongshan agriculture park, in the rural area of Wuxi city
23 / 31.380 / 120.500 / 28-35 / SE / Located at the side of Xugan bridge near the Beijing-Hangzhou Grand Canal in Xuguan town, Suzhou and many ships in the Canal
24 / 31.218 / 120.358 / 28-35 / SE / Located at the side of Taihu lake near the Yuyangshan mountain, Suzhou
25 / 31.143 / 120.634 / 28-35 / S / Located in a small wood in Songling town, Wujiang
26 / 30.905 / 120.641 / 28-35 / S / Located in the central square in Shengze town, Wujiang
27 / 31.311 / 120.785 / 28-35 / SE / Located at the roadside in the Changyang street, Suzhou
28 / 31.335 / 120.702 / 28-35 / SE / Located at the roadside in the Development zone, Suzhou
29 / 31.286 / 120.631 / 28-35 / S / Located in a residential area in the city center in Nanmen, Canglang district, Suzhou
30 / 31.302 / 120.599 / 28-35 / S / Located in the city center in Environmental monitoring station of Suzhou
31 / 31.299 / 120.549 / 28-35 / S / Inside a middle school campus in the New district, Suzhou
32 / 31.972 / 120.256 / 26-33 / NE / Located in a small wood at the side of Jingjiang freeway with heavy traffic, Jingjiang
33 / 31.077 / 120.289 / 27-35 / S / Located at the side of Taihu lake near the Jinting town, Suzhou
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