Three-year decline of magmatic CO2 emissions from soils of a Mammoth Mountain tree kill: Horseshoe Lake, CA, 1995-1997
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Abstract
We used the closed chamber method to measure soil CO2 efflux over a three-year period at the Horseshoe Lake tree kill (HLTK)—the largest tree kill on Mammoth Mountain in central eastern California. Efflux contour maps show a significant decline in the areas and rates of CO2 emission from 1995 to 1997. The emission rate fell from 350 t d−1 (metric tons per day) in 1995 to 130 t d−1 in 1997. The trend suggests a return to background soil CO2 efflux levels by early to mid 1999 and may reflect exhaustion of CO2 in a deep reservoir of accumulated gas and/or mechanical closure or sealing of fault conduits transmitting gas to the surface. However, emissions rose to 220 t d−1 on 23 September 1997 at the onset of a degassing event that lasted until 5 December 1997. Recent reservoir recharge and/or extension-enhanced gas flow may have caused the degassing event.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Three-year decline of magmatic CO2 emissions from soils of a Mammoth Mountain tree kill: Horseshoe Lake, CA, 1995-1997 |
| Series title | Geophysical Research Letters |
| DOI | 10.1029/98GL01298 |
| Volume | 25 |
| Issue | 10 |
| Year Published | 1998 |
| Language | English |
| Publisher | American Geophysical Union |
| Description | 4 p. |
| First page | 1947 |
| Last page | 1950 |
| Google Analytic Metrics | Metrics page |