High-resolution satellite data reveal an increase in peak growing season gross primary production in a high-Arctic wet tundra ecosystem 1992-2008
Arctic ecosystems play a key role in the terrestrial carbon cycle. Our aim was to combine satellite-based normalized difference vegetation index (NDVI) with field measurements of CO2 fluxes to investigate changes in gross primary production (GPP) for the peak growing seasons 1992-2008 in Rylekaerene...
Published in: | International Journal of Applied Earth Observation and Geoinformation |
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Language: | English |
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ftulundlup:oai:lup.lub.lu.se:0632313e-3282-4999-a2af-d7693894cb13 2023-05-15T14:56:45+02:00 High-resolution satellite data reveal an increase in peak growing season gross primary production in a high-Arctic wet tundra ecosystem 1992-2008 Tagesson, Torbern Mastepanov, Mikhail Tamstorf, Mikkel P. Eklundh, Lars Schubert, Per Ekberg, Anna Sigsgaard, Charlotte Christensen, Torben Ström, Lena 2012 application/pdf https://lup.lub.lu.se/record/2994881 https://doi.org/10.1016/j.jag.2012.03.016 https://portal.research.lu.se/files/45731826/Tagesson_et_al_2012_IJAEOG.pdf eng eng Elsevier https://lup.lub.lu.se/record/2994881 http://dx.doi.org/10.1016/j.jag.2012.03.016 https://portal.research.lu.se/files/45731826/Tagesson_et_al_2012_IJAEOG.pdf wos:000306198900038 scopus:84864506760 info:eu-repo/semantics/openAccess International Journal of Applied Earth Observation and Geoinformation; 18, pp 407-416 (2012) ISSN: 1569-8432 Physical Geography Light use efficiency NDVI Remote sensing Climate change FAPAR GPP contributiontojournal/article info:eu-repo/semantics/article text 2012 ftulundlup https://doi.org/10.1016/j.jag.2012.03.016 2023-02-01T23:26:48Z Arctic ecosystems play a key role in the terrestrial carbon cycle. Our aim was to combine satellite-based normalized difference vegetation index (NDVI) with field measurements of CO2 fluxes to investigate changes in gross primary production (GPP) for the peak growing seasons 1992-2008 in Rylekaerene, a wet tundra ecosystem in the Zackenberg valley, north-eastern Greenland. A method to incorporate controls on GPP through satellite data is the light use efficiency (LUE) model, here expressed as GPP = epsilon(peak) x PAR(in) x FAPAR(green_peak); where epsilon(peak) was peak growing season light use efficiency of the vegetation, PARin was incoming photosynthetically active radiation, and FAPAR(green_peak) was peak growing season fraction of PAR absorbed by the green vegetation. The Speak was measured for seven different high-Arctic plant communities in the field, and it was on average 1.63 g CO2 MJ(-1). We found a significant linear relationship between FAPARgreen_peak measured in the field and satellite-based NDVI. The linear regression was applied to peak growing season NDVI 1992-2008 and derived FAPAR(green_peak) was entered into the LUE-model. It was shown that when several empirical models are combined, propagation errors are introduced, which results in considerable model uncertainties. The LUE-model was evaluated against field-measured GPP and the model captured field-measured GPP well (RMSE was 192 mg CO2 m(-2) h(-1)). The model showed an increase in peak growing season GPP of 42 mg CO2 m(-2) h(-1) y(-1) in Rylekaerene 1992-2008. There was also a strong increase in air temperature (0.15 degrees C y(-1)), indicating that the GPP trend may have been climate driven. (C) 2012 Elsevier B.V. All rights reserved. Article in Journal/Newspaper Arctic Climate change Greenland Tundra Zackenberg Lund University Publications (LUP) Arctic Greenland International Journal of Applied Earth Observation and Geoinformation 18 407 416 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Physical Geography Light use efficiency NDVI Remote sensing Climate change FAPAR GPP |
spellingShingle |
Physical Geography Light use efficiency NDVI Remote sensing Climate change FAPAR GPP Tagesson, Torbern Mastepanov, Mikhail Tamstorf, Mikkel P. Eklundh, Lars Schubert, Per Ekberg, Anna Sigsgaard, Charlotte Christensen, Torben Ström, Lena High-resolution satellite data reveal an increase in peak growing season gross primary production in a high-Arctic wet tundra ecosystem 1992-2008 |
topic_facet |
Physical Geography Light use efficiency NDVI Remote sensing Climate change FAPAR GPP |
description |
Arctic ecosystems play a key role in the terrestrial carbon cycle. Our aim was to combine satellite-based normalized difference vegetation index (NDVI) with field measurements of CO2 fluxes to investigate changes in gross primary production (GPP) for the peak growing seasons 1992-2008 in Rylekaerene, a wet tundra ecosystem in the Zackenberg valley, north-eastern Greenland. A method to incorporate controls on GPP through satellite data is the light use efficiency (LUE) model, here expressed as GPP = epsilon(peak) x PAR(in) x FAPAR(green_peak); where epsilon(peak) was peak growing season light use efficiency of the vegetation, PARin was incoming photosynthetically active radiation, and FAPAR(green_peak) was peak growing season fraction of PAR absorbed by the green vegetation. The Speak was measured for seven different high-Arctic plant communities in the field, and it was on average 1.63 g CO2 MJ(-1). We found a significant linear relationship between FAPARgreen_peak measured in the field and satellite-based NDVI. The linear regression was applied to peak growing season NDVI 1992-2008 and derived FAPAR(green_peak) was entered into the LUE-model. It was shown that when several empirical models are combined, propagation errors are introduced, which results in considerable model uncertainties. The LUE-model was evaluated against field-measured GPP and the model captured field-measured GPP well (RMSE was 192 mg CO2 m(-2) h(-1)). The model showed an increase in peak growing season GPP of 42 mg CO2 m(-2) h(-1) y(-1) in Rylekaerene 1992-2008. There was also a strong increase in air temperature (0.15 degrees C y(-1)), indicating that the GPP trend may have been climate driven. (C) 2012 Elsevier B.V. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Tagesson, Torbern Mastepanov, Mikhail Tamstorf, Mikkel P. Eklundh, Lars Schubert, Per Ekberg, Anna Sigsgaard, Charlotte Christensen, Torben Ström, Lena |
author_facet |
Tagesson, Torbern Mastepanov, Mikhail Tamstorf, Mikkel P. Eklundh, Lars Schubert, Per Ekberg, Anna Sigsgaard, Charlotte Christensen, Torben Ström, Lena |
author_sort |
Tagesson, Torbern |
title |
High-resolution satellite data reveal an increase in peak growing season gross primary production in a high-Arctic wet tundra ecosystem 1992-2008 |
title_short |
High-resolution satellite data reveal an increase in peak growing season gross primary production in a high-Arctic wet tundra ecosystem 1992-2008 |
title_full |
High-resolution satellite data reveal an increase in peak growing season gross primary production in a high-Arctic wet tundra ecosystem 1992-2008 |
title_fullStr |
High-resolution satellite data reveal an increase in peak growing season gross primary production in a high-Arctic wet tundra ecosystem 1992-2008 |
title_full_unstemmed |
High-resolution satellite data reveal an increase in peak growing season gross primary production in a high-Arctic wet tundra ecosystem 1992-2008 |
title_sort |
high-resolution satellite data reveal an increase in peak growing season gross primary production in a high-arctic wet tundra ecosystem 1992-2008 |
publisher |
Elsevier |
publishDate |
2012 |
url |
https://lup.lub.lu.se/record/2994881 https://doi.org/10.1016/j.jag.2012.03.016 https://portal.research.lu.se/files/45731826/Tagesson_et_al_2012_IJAEOG.pdf |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Climate change Greenland Tundra Zackenberg |
genre_facet |
Arctic Climate change Greenland Tundra Zackenberg |
op_source |
International Journal of Applied Earth Observation and Geoinformation; 18, pp 407-416 (2012) ISSN: 1569-8432 |
op_relation |
https://lup.lub.lu.se/record/2994881 http://dx.doi.org/10.1016/j.jag.2012.03.016 https://portal.research.lu.se/files/45731826/Tagesson_et_al_2012_IJAEOG.pdf wos:000306198900038 scopus:84864506760 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.jag.2012.03.016 |
container_title |
International Journal of Applied Earth Observation and Geoinformation |
container_volume |
18 |
container_start_page |
407 |
op_container_end_page |
416 |
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1766328825438797824 |