Supporting information:

Table S1. The information of each sampling site

Sampling ID / Name of sample / Functional areas / Longitude / Latitude
1 / Zizhuyuan park / Park / 116.3150 / 39.9350
2 / Huixinli housingestate / Residential area / 116.4189 / 39.9720
3 / Wangfujing street / Commercial area / 116.4105 / 39.9135
4 / Yuyuantan park / Park / 116.3195 / 39.9065
5 / Lize housingestate / Residential area / 116.3682 / 39.9586
6 / street next to national stadium / Street / 116.3960 / 39.9900
7 / Xingtan street / Street / 116.3606 / 39.9577
8 / Beisanhuan road / main-road / 116.3652 / 39.9667
9 / Xisanhuan north road / main-road / 116.3030 / 39.9564
10 / Lianhuachi east road / Commercial area / 116.3128 / 39.8959
11 / Lize street / Street / 116.3193 / 39.8693
12 / Yongdingmen / Commercial area / 116.3840 / 39.8690
13 / Taoranting park / Park / 116.3723 / 39.8715
14 / Baizhifang west street / Commercial area / 116.3647 / 39.8764
15 / Luoma street / Commercial area / 116.3590 / 39.8880
16 / Tiantan park / Park / 116.4116 / 39.8840
17 / Panjiayuan street / Street / 116.4444 / 39.8749
18 / Jingmi road / main-road / 116.4478 / 39.9569
19 / Gongti beilu / Street / 116.4511 / 39.9323
20 / Dongsanhuan Middle Road / main-road / 116.4478 / 39.9022
21 / Dongbianmin qiao / Street / 116.4351 / 39.9096
22 / Qianmendong street / Commercial area / 116.4091 / 39.8995
23 / Xidan / Commercial area / 116.3679 / 39.9099
24 / Wusi street / Commercial area / 116.4038 / 39.9230
25 / Xizhimenwai street / Commercial area / 116.3397 / 39.9385
26 / Fuchengmenwai street / main-road / 116.3486 / 39.9223
27 / Andingmen west street / main-road / 116.4119 / 39.9480
28 / Beijing Normal University campus / Residential area / 116.3660 / 39.9592
29 / Beihang University campus / Residential area / 116.3422 / 39.9799
30 / Fucheng road / Street / 116.2743 / 39.9231
31 / Yuegezhuang north road / Street / 116.2710 / 39.8778
32 / Hualinjiayuan housingestate / Residential area / 116.2941 / 39.8418
33 / Caoqiao east road / Street / 116.3589 / 39.8376
34 / Fangzhuang south road / Street / 116.4329 / 39.8471
35 / Fenzhongsi road / Commercial area / 116.4685 / 39.8572
36 / Huixinli housingestate / Residential area / 116.4214 / 39.9778
37 / Dongsihuan middle road / main-road / 116.4839 / 39.8993
38 / Chaoyang park / Park / 116.4782 / 39.9410