Table 1 Data set of 10 sites used in this study
Location | Symbol used | Data available | Data not available |
|---|---|---|---|
Kunming | KM | 2007–2016 | 2007.1–2007.7 |
Okinawa | OKI | 2007–2016 |  |
Suzhou | SZ | 2009–2016 | 2009.1–2009.5 |
Yamagawa | YAM | 2009–2016 |  |
Lanzhou | LZ | 1997–2016 |  |
Qingdao | QD | 1997–2016 | 1997.1–2000.8 |
Kokubunji | KOK | 1997–2016 |  |
Urumqi | UR | 1997–2016 | 1997.3–1997.12 |
Changchun | CC | 1997–2016 |  |
Wakkanai | WAK | 1997–2016 | 1997.9–1997.11, 1998.1, 3–4, 12, 1999.1, 4–5, 7–12, 2000.3–4, 5–12 |