| タイトル | High-Frequency Measurements of Methane Ebullition Over a Growing Season at a Temperate Peatland Site |
| 著者（英） | Frolking, Steve; Varner, Ruth K.; Crill, Patrick M.; Duncan, Bryan N.; Goodrich, Jordan P. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2011-04-15 |
| 言語 | eng |
| 内容記述 | Bubbles can contribute a significant fraction of methane emissions fr om wetlands; however the range of reported fractions is very large an d accurate characterization of this pathway has proven difficult. Her e we show that continuous automated flux chambers combined with an in tegrated cavity output spectroscopy (ICOS) instrument allow us to qua ntify both CH4 ebullition rate and magnitude. For a temperate poor f en in 2009, ebullition rate varied on hourly to seasonal time scales. A diel pattern in ebullition was identified with peak release occurr ing between 20:00 and 06:00 local time, though steady fluxes (i.e., t hose with a linear increase in chamber headspace CH4 concentration) d id not exhibit diel variability. Seasonal mean ebullition rates peake d at 843.5 +/- 384.2 events m(exp -2)/d during the summer, with a me an magnitude of 0.19 mg CH4 released in each event. |
| NASA分類 | Geosciences (General) |
| レポートNO | GSFC.JA.4580.2011 |
| 権利 | Copyright |
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