Isoprene emission from tropical trees in Okinawa Island, Japan [An article from: Chemosphere]

This digital document is a journal article from Chemosphere, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
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 20@mgg^-^1h^-^1, and 28 showed the rates of 1-10@mgg^-^1h^-^1. The remainder emitted less than 1@mgg^-^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 14.2@mgg^-^1h^-^1. The highest emission rate of 107.1@mgg^-^1h^-^1 for 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 1700@mmolm^-^2s^-^1. These findings may show the potential importance of subtropical areas as sources of isoprene to the atmosphere.