Regularity and estimation of methane emission from marshland in the Sanjiang Plain |
| |
| Authors: | Cui Baoshan Ma Xuehui and Zhang Mingxiang |
| |
| Institution: | (1) Changchun Institute of Geography, the Chinese Academy of Sciences, 130021 Changchun, P. R. China;(2) Ministry of Forestry, the People’s Republic of China, 100714 Beijing, P. R. China |
| |
| Abstract: | The regularity of CH4 emission from marshland in the Sanjiang Plain was studied by sampling in the open field and analyzing under laboratory condition,
the annual emission amount is also estimated. By Grey Relatively Analysis we know that the soil temperature in the 10-cm depth
of grass-root layer is close related with CH4 emission. CH4 emission has different kinds of diurnal emission modes:before-dawn maximum mode, night maximum mode and irregular fluctuation
mode. The seasonal variation trend of CH4 emission rates is going up steadily from May to August and dropping down from September, the maximum lies behind the maximum
of temperature. CH4 emission rates of different marshland types are different, the CH4 emission rate of Glyceriaspiculosa — Carex marshland is always higher than that of Carex lasiocarpa marshland. The paper also studies the difference of CH4 emission rates in different managing modes and analyzes the emission rates between China and U. S. A. The result shows: the
average value of CH4 emission rate is 17.26mg/(m2·h), the annual amount of CH4 emission is about 0.75Tg.
Supported by National Natural Sciences Foundation of China, and thank the Ecological Test Station of Mires and Wetlands in
the Sanjiang Plain, the Chinese Academy of Sciences. |
| |
| Keywords: | Sanjiang Plain marshland methane emission diurnal variation seasonal variation |
| 本文献已被 SpringerLink 等数据库收录！ |
|
