Seasonal temperature variations influence isoprene emission

被引：120

作者：

Pétron, G ^{[1
]}

Harley, P ^{[1
]}

Greenberg, J ^{[1
]}

Guenther, A ^{[1
]}

机构：

[1] Natl Ctr Atmospher Res, Div Atmospher Chem, Boulder, CO 80307 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2001年 / 28卷 / 09期

关键词：

D O I：

10.1029/2000GL011583

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Isoprene (2-methyl-1,3-butadiene) emission from plants is highly temperature dependent. The influence of long-term variations in growth temperature on isoprene emission rates from bur oak (Quercus macrocarpa) leaves was investigated under controlled environmental conditions. Trees were installed in a growth chamber and exposed to a series of daytime temperatures that were varied after a period of 3-6 weeks. Emission capacity (measured at leaf temperature of 25 degreesC and photosynthetic photon flux density of 900 mu mol m(-2) s(-1)) doubled when growth temperature was increased from 25 to 30 degreesC. Ten days after the growth temperature was decreased to 20 degreesC, isoprene emission capacity fell to 25 to 50% of its peak value. When growth temperature was returned to 30 degreesC, emission capacity doubled within 5 hours and continued to increase over several days. The observed behavior can be described by modifying existing algorithms.

引用

页码：1707 / 1710

页数：4

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