CO2 discharge from the bottom of volcanic Lake Rotomahana, New Zealand
[1] From April 2010 to February 2011, CO2 flux surveys were performed on Lake Rotomahana, New Zealand. The area has been hydrothermally active with fumaroles and sublacustrine hydrothermal activity before and since the eruption of Mt Tarawera in 1886. The total CO2 emission from the lake calculated...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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2014
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| Online Access: | https://hdl.handle.net/10356/104120 http://hdl.handle.net/10220/19512 |
| _version_ | 1826113251671277568 |
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| author | Mazot, Agnes Schwandner, Florian M. Christenson, Bruce de Ronde, Cornel E. J. Inguaggiato, Salvatore Scott, Brad Graham, Duncan Britten, Karen Keeman, J. Tan, Karine |
| author_facet | Mazot, Agnes Schwandner, Florian M. Christenson, Bruce de Ronde, Cornel E. J. Inguaggiato, Salvatore Scott, Brad Graham, Duncan Britten, Karen Keeman, J. Tan, Karine |
| author_sort | Mazot, Agnes |
| collection | NTU |
| description | [1] From April 2010 to February 2011, CO2 flux surveys were performed on Lake Rotomahana, New Zealand. The area has been hydrothermally active with fumaroles and sublacustrine hydrothermal activity before and since the eruption of Mt Tarawera in 1886. The total CO2 emission from the lake calculated by sequential Gaussian simulation is 549 ± 72 t d−1. Two different mechanisms of degassing, diffusion through the water-air interface and bubbling, are distinguished using a graphical statistical approach. The carbon dioxide budget calculated for the lake confirms that the main source of CO2 to the atmosphere is by diffusion covering 94.5% of the lake area (mean CO2 flux 25 g m−2 d−1) and to a lesser extent, bubbling (mean CO2 flux 1297 g m−2 d−1). Mapping of the CO2 flux over the entire lake, including over lake floor vents detected during the survey, correlates with eruption craters formed during the 1886 eruption. These surveys also follow regional tectonic patterns present in the southeastern sector of Lake Rotomahana suggesting a deep magmatic source (∼10 km) for CO2 and different pathways for the gas to escape to the surface. The values of δ13CCO2 (−2.88 and −2.39‰) confirm the magmatic origin of CO2. |
| first_indexed | 2024-10-01T03:20:28Z |
| format | Journal Article |
| id | ntu-10356/104120 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:20:28Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | ntu-10356/1041202020-09-26T21:26:44Z CO2 discharge from the bottom of volcanic Lake Rotomahana, New Zealand Mazot, Agnes Schwandner, Florian M. Christenson, Bruce de Ronde, Cornel E. J. Inguaggiato, Salvatore Scott, Brad Graham, Duncan Britten, Karen Keeman, J. Tan, Karine DRNTU::Science::Geology [1] From April 2010 to February 2011, CO2 flux surveys were performed on Lake Rotomahana, New Zealand. The area has been hydrothermally active with fumaroles and sublacustrine hydrothermal activity before and since the eruption of Mt Tarawera in 1886. The total CO2 emission from the lake calculated by sequential Gaussian simulation is 549 ± 72 t d−1. Two different mechanisms of degassing, diffusion through the water-air interface and bubbling, are distinguished using a graphical statistical approach. The carbon dioxide budget calculated for the lake confirms that the main source of CO2 to the atmosphere is by diffusion covering 94.5% of the lake area (mean CO2 flux 25 g m−2 d−1) and to a lesser extent, bubbling (mean CO2 flux 1297 g m−2 d−1). Mapping of the CO2 flux over the entire lake, including over lake floor vents detected during the survey, correlates with eruption craters formed during the 1886 eruption. These surveys also follow regional tectonic patterns present in the southeastern sector of Lake Rotomahana suggesting a deep magmatic source (∼10 km) for CO2 and different pathways for the gas to escape to the surface. The values of δ13CCO2 (−2.88 and −2.39‰) confirm the magmatic origin of CO2. Published version 2014-06-03T02:25:41Z 2019-12-06T21:26:52Z 2014-06-03T02:25:41Z 2019-12-06T21:26:52Z 2014 2014 Journal Article Mazot, A., Schwandner, F. M., Christenson, B., de Ronde, C. E. J., Inguaggiato, S., Scott, B., et al. (2014). CO2 discharge from the bottom of volcanic Lake Rotomahana, New Zealand . Geochemistry, Geophysics, Geosystems, 15(3), 577-588. 1525-2027 https://hdl.handle.net/10356/104120 http://hdl.handle.net/10220/19512 10.1002/2013GC004945 en Geochemistry, geophysics, geosystems © 2014 American Geophysical Union. This paper was published in Geochemistry, Geophysics, Geosystems and is made available as an electronic reprint (preprint) with permission of American Geophysical Union. The paper can be found at the following official DOI: http://dx.doi.org/10.1002/2013GC004945. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf |
| spellingShingle | DRNTU::Science::Geology Mazot, Agnes Schwandner, Florian M. Christenson, Bruce de Ronde, Cornel E. J. Inguaggiato, Salvatore Scott, Brad Graham, Duncan Britten, Karen Keeman, J. Tan, Karine CO2 discharge from the bottom of volcanic Lake Rotomahana, New Zealand |
| title | CO2 discharge from the bottom of volcanic Lake Rotomahana, New Zealand |
| title_full | CO2 discharge from the bottom of volcanic Lake Rotomahana, New Zealand |
| title_fullStr | CO2 discharge from the bottom of volcanic Lake Rotomahana, New Zealand |
| title_full_unstemmed | CO2 discharge from the bottom of volcanic Lake Rotomahana, New Zealand |
| title_short | CO2 discharge from the bottom of volcanic Lake Rotomahana, New Zealand |
| title_sort | co2 discharge from the bottom of volcanic lake rotomahana new zealand |
| topic | DRNTU::Science::Geology |
| url | https://hdl.handle.net/10356/104120 http://hdl.handle.net/10220/19512 |
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