Isoprene emission from tropical trees in Okinawa Island, Japan.
Isoprene emission from tropical trees in Okinawa Island, Japan.
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DOI：
10.1016/j.chemosphere.2006.06.013
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发表时间：
2006-12
期刊：
影响因子：
8.8
通讯作者：
P. Tambunan;S. Baba;Ayako Kuniyoshi;H. Iwasaki;Takashi Nakamura;H. Yamasaki;H. Oku
中科院分区：
文献类型：
--
作者：
P. Tambunan;S. Baba;Ayako Kuniyoshi;H. Iwasaki;Takashi Nakamura;H. Yamasaki;H. Oku
这项研究调查了日本冲绳42种本土和外来热带树木的异戊二烯排放。在所研究的42棵树中，有4棵异戊二烯的排放速率超过20μgg−1h−1，28棵异戊二烯的排放速率在1-10μgg−1h−1，其余的排放小于1μgg−1h−1。因此，本研究中的大多数树木可能属于排放较低的树种。而产于冲绳的桑科树种释放异戊二烯的速率相对较高，平均为14.2nmolm gg−1h−1。原始无花果的最高释放速率为107.1μgg−1h−1，其面积基础速率为47.4nmolm−2s−1，与高排放物种的速率基本相当。此外，光强与异戊二烯排放之间存在线性关系，直到1700MOLmμ−2s−1。这些发现可能表明亚热带地区作为异戊二烯来源对大气的潜在重要性。
This study surveyed isoprene emission from 42 indigenous and exotic tropical trees in subtropic Okinawa, Japan. Of the 42 trees studied, 4 emitted isoprene at a rate in excess of 20μgg−1h−1, and 28 showed the rates of 1–10μgg−1h−1. The remainder emitted less than 1μgg−1h−1. The majority of trees in this study may therefore fall within the lower emitting species. However, species in Moraceae that is indigenous in Okinawa emitted isoprene at relatively higher rates with an average of 14.2μgg−1h−1. The highest emission rate of 107.1μgg−1h−1for Ficus virgata yielded the area basis rate of 47.4nmolm−2s−1, which is almost equivalent to the rate of high emitting species. Furthermore, a linear relationship between light intensity and isoprene emission was noted with Ficus virgata up to 1700μmolm−2s−1. These findings may show the potential importance of subtropical areas as sources of isoprene to the atmosphere.