Spatial and temporal variability in soil CO2-C emissions and relation to soil temperature at King George Island, maritime Antarctica
Few studies have examined the effects of temperature on spatial and temporal trends in soil CO2-C emissions in Antarctica. In this work, we present in situ measurements of CO2-C emissions and assess their relation with soil temperature, using dynamic chambers. We found an exponential relation betwee...
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ftunivesp:oai:acervodigital.unesp.br:11449/71991 2023-05-15T13:42:17+02:00 Spatial and temporal variability in soil CO2-C emissions and relation to soil temperature at King George Island, maritime Antarctica La Scala, Newton de Sá Mendonça, Eduardo Vanir de Souza, Juliana Panosso, Alan Rodrigo Simas, Felipe N.B. Schaefer, Carlos E.G.R. Universidade Estadual Paulista (UNESP) 2014-05-27T11:24:51Z http://acervodigital.unesp.br/handle/11449/71991 http://hdl.handle.net/11449/71991 https://doi.org/10.1016/j.polar.2010.07.001 eng eng Polar Science Polar Science, v. 4, n. 3, p. 479-487, 2010. 1873-9652 http://hdl.handle.net/11449/71991 http://acervodigital.unesp.br/handle/11449/71991 doi:10.1016/j.polar.2010.07.001 2-s2.0-77957792263 http://dx.doi.org/10.1016/j.polar.2010.07.001 info:eu-repo/semantics/closedAccess Climate change Cryosols Gelisols Soil carbon stock Soil respiration carbon dioxide frozen ground grass in situ measurement moss soil carbon soil emission soil temperature spatiotemporal analysis Antarctica King George Island South Shetland Islands Bryophyta Deschampsia antarctica Poaceae outro 2014 ftunivesp https://doi.org/10.1016/j.polar.2010.07.001 2021-07-18T08:41:32Z Few studies have examined the effects of temperature on spatial and temporal trends in soil CO2-C emissions in Antarctica. In this work, we present in situ measurements of CO2-C emissions and assess their relation with soil temperature, using dynamic chambers. We found an exponential relation between CO2 emissions and soil temperature, with the value of Q10 being close to 2.1. Mean emission rates were as low as 0.026 and 0.072 g of CO2-C m-2 h-1 for bare soil and soil covered with moss, respectively, and as high as 0.162 g of CO2-C m-2 h-1 for soil covered with grass, Deschampsia antarctica Desv. (Poaceae). A spatial variability analysis conducted using a 60-point grid, for an area with mosses (Sannionia uncianata) and D. antarctica, yielded a spherical semivariogram model for CO2-C emissions with a range of 1 m. The results suggest that soil temperature is a controlling factor on temporal variations in soil CO2-C emissions, although spatial variations appear to be more strongly related to the distribution of vegetation types. © 2010 Elsevier B.V. and NIPR. Other/Unknown Material Antarc* Antarctica King George Island Polar Science Polar Science South Shetland Islands Universidade Estadual Paulista São Paulo: Acervo Digital da UNESP / São Paulo State University King George Island South Shetland Islands Polar Science 4 3 479 487 |
institution |
Open Polar |
collection |
Universidade Estadual Paulista São Paulo: Acervo Digital da UNESP / São Paulo State University |
op_collection_id |
ftunivesp |
language |
English |
topic |
Climate change Cryosols Gelisols Soil carbon stock Soil respiration carbon dioxide frozen ground grass in situ measurement moss soil carbon soil emission soil temperature spatiotemporal analysis Antarctica King George Island South Shetland Islands Bryophyta Deschampsia antarctica Poaceae |
spellingShingle |
Climate change Cryosols Gelisols Soil carbon stock Soil respiration carbon dioxide frozen ground grass in situ measurement moss soil carbon soil emission soil temperature spatiotemporal analysis Antarctica King George Island South Shetland Islands Bryophyta Deschampsia antarctica Poaceae La Scala, Newton de Sá Mendonça, Eduardo Vanir de Souza, Juliana Panosso, Alan Rodrigo Simas, Felipe N.B. Schaefer, Carlos E.G.R. Spatial and temporal variability in soil CO2-C emissions and relation to soil temperature at King George Island, maritime Antarctica |
topic_facet |
Climate change Cryosols Gelisols Soil carbon stock Soil respiration carbon dioxide frozen ground grass in situ measurement moss soil carbon soil emission soil temperature spatiotemporal analysis Antarctica King George Island South Shetland Islands Bryophyta Deschampsia antarctica Poaceae |
description |
Few studies have examined the effects of temperature on spatial and temporal trends in soil CO2-C emissions in Antarctica. In this work, we present in situ measurements of CO2-C emissions and assess their relation with soil temperature, using dynamic chambers. We found an exponential relation between CO2 emissions and soil temperature, with the value of Q10 being close to 2.1. Mean emission rates were as low as 0.026 and 0.072 g of CO2-C m-2 h-1 for bare soil and soil covered with moss, respectively, and as high as 0.162 g of CO2-C m-2 h-1 for soil covered with grass, Deschampsia antarctica Desv. (Poaceae). A spatial variability analysis conducted using a 60-point grid, for an area with mosses (Sannionia uncianata) and D. antarctica, yielded a spherical semivariogram model for CO2-C emissions with a range of 1 m. The results suggest that soil temperature is a controlling factor on temporal variations in soil CO2-C emissions, although spatial variations appear to be more strongly related to the distribution of vegetation types. © 2010 Elsevier B.V. and NIPR. |
author2 |
Universidade Estadual Paulista (UNESP) |
format |
Other/Unknown Material |
author |
La Scala, Newton de Sá Mendonça, Eduardo Vanir de Souza, Juliana Panosso, Alan Rodrigo Simas, Felipe N.B. Schaefer, Carlos E.G.R. |
author_facet |
La Scala, Newton de Sá Mendonça, Eduardo Vanir de Souza, Juliana Panosso, Alan Rodrigo Simas, Felipe N.B. Schaefer, Carlos E.G.R. |
author_sort |
La Scala, Newton |
title |
Spatial and temporal variability in soil CO2-C emissions and relation to soil temperature at King George Island, maritime Antarctica |
title_short |
Spatial and temporal variability in soil CO2-C emissions and relation to soil temperature at King George Island, maritime Antarctica |
title_full |
Spatial and temporal variability in soil CO2-C emissions and relation to soil temperature at King George Island, maritime Antarctica |
title_fullStr |
Spatial and temporal variability in soil CO2-C emissions and relation to soil temperature at King George Island, maritime Antarctica |
title_full_unstemmed |
Spatial and temporal variability in soil CO2-C emissions and relation to soil temperature at King George Island, maritime Antarctica |
title_sort |
spatial and temporal variability in soil co2-c emissions and relation to soil temperature at king george island, maritime antarctica |
publishDate |
2014 |
url |
http://acervodigital.unesp.br/handle/11449/71991 http://hdl.handle.net/11449/71991 https://doi.org/10.1016/j.polar.2010.07.001 |
geographic |
King George Island South Shetland Islands |
geographic_facet |
King George Island South Shetland Islands |
genre |
Antarc* Antarctica King George Island Polar Science Polar Science South Shetland Islands |
genre_facet |
Antarc* Antarctica King George Island Polar Science Polar Science South Shetland Islands |
op_relation |
Polar Science Polar Science, v. 4, n. 3, p. 479-487, 2010. 1873-9652 http://hdl.handle.net/11449/71991 http://acervodigital.unesp.br/handle/11449/71991 doi:10.1016/j.polar.2010.07.001 2-s2.0-77957792263 http://dx.doi.org/10.1016/j.polar.2010.07.001 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.polar.2010.07.001 |
container_title |
Polar Science |
container_volume |
4 |
container_issue |
3 |
container_start_page |
479 |
op_container_end_page |
487 |
_version_ |
1766166169311510528 |