Seasonal emissions of isoprene and other reactive hydrocarbon gases from the ocean
Seasonal emissions of isoprene and other reactive hydrocarbon gases from the ocean
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DOI：
10.1029/97gl02736
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发表时间：
1997-11-01
影响因子：
5.2
通讯作者：
Penkett, SA
中科院分区：
文献类型：
--
作者：
Broadgate, WJ;Liss, PS;Penkett, SA
在本文中，我们表明，从海洋中的异戊二烯排放量是强烈的季节性依赖，并与在北海和南大洋的测量水的叶绿素含量。我们估计异戊二烯向大气的季节平均通量为1.7 x 10（7）分子cm（-2）s（-1），这可能对远离陆地的地区的大气化学具有重要意义，因为它是这些地区大气异戊二烯的唯一已知来源。我们观察到一个强大的季节性循环的其他几个NMHCs在高纬度地区的海水中，在夏季最大。这将扭曲目前对非金属碳氢化合物每年海洋通量的估计，可能需要减少一个数量级，以解释冬季排放量的减少。
In this paper we show evidence that isoprene emission from the oceans is strongly seasonally dependent and is correlated with the chlorophyll content of the water from measurements in the North Sea and Southern Ocean. We estimate the seasonally averaged flux of isoprene to the atmosphere to be 1.7 x 10(7) molecules cm(-2) s(-1), which may be significant for atmospheric chemistry in locations remote from land as it is the only known source of atmospheric isoprene in these regions. We observe a strong seasonal cycle of several other NMHCs in seawater at high latitudes, with a maximum in summer. This will distort current estimates of the annual marine flux of NMHCs to the atmosphere which may need to be reduced by up to an order of magnitude to account for lower emissions in winter.