Influence of ENSO and the NAO on terrestrial carbon uptake in the Texas‐northern Mexico region
Climate extremes such as drought and heat waves can cause substantial reductions in terrestrial carbon uptake. Advancing projections of the carbon uptake response to future climate extremes depends on (1) identifying mechanistic links between the carbon cycle and atmospheric drivers, (2) detecting a...
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ftcdlib:oai:escholarship.org:ark:/13030/qt5rd65831 2024-01-07T09:45:18+01:00 Influence of ENSO and the NAO on terrestrial carbon uptake in the Texas‐northern Mexico region Parazoo, Nicholas C Barnes, Elizabeth Worden, John Harper, Anna B Bowman, Kevin B Frankenberg, Christian Wolf, Sebastian Litvak, Marcy Keenan, Trevor F 1247 - 1265 2015-08-01 application/pdf https://escholarship.org/uc/item/5rd65831 unknown eScholarship, University of California qt5rd65831 https://escholarship.org/uc/item/5rd65831 public Global Biogeochemical Cycles, vol 29, iss 8 Earth Sciences Oceanography Climate Action Atmospheric Sciences Geochemistry Meteorology & Atmospheric Sciences Geoinformatics Climate change impacts and adaptation article 2015 ftcdlib 2023-12-11T19:07:28Z Climate extremes such as drought and heat waves can cause substantial reductions in terrestrial carbon uptake. Advancing projections of the carbon uptake response to future climate extremes depends on (1) identifying mechanistic links between the carbon cycle and atmospheric drivers, (2) detecting and attributing uptake changes, and (3) evaluating models of land response and atmospheric forcing. Here, we combine model simulations, remote sensing products, and ground observations to investigate the impact of climate variability on carbon uptake in the Texas-northern Mexico region. Specifically, we (1) examine the relationship between drought, carbon uptake, and variability of El Niño-Southern Oscillation (ENSO) and the North Atlantic Oscillation (NAO) using the Joint UK Land-Environment Simulator (JULES) biosphere simulations from 1950-2012, (2) quantify changes in carbon uptake during record drought conditions in 2011, and (3) evaluate JULES carbon uptake and soil moisture in 2011 using observations from remote sensing and a network of flux towers in the region. Long-term simulations reveal systematic decreases in regional-scale carbon uptake during negative phases of ENSO and NAO, including amplified reductions of gross primary production (GPP) (-0.42 ± 0.18 Pg C yr-1) and net ecosystem production (NEP) (-0.14 ± 0.11 Pg C yr-1) during strong La Niña years. The 2011 megadrought caused some of the largest declines of GPP (-0.50 Pg C yr-1) and NEP (-0.23 Pg C yr-1) in our simulations. In 2011, consistent declines were found in observations, including high correlation of GPP and surface soil moisture (r = 0.82 ± 0.23, p = 0.012) in remote sensing-based products. These results suggest a large-scale response of carbon uptake to ENSO and NAO, and highlight a need to improve model predictions of ENSO and NAO in order to improve predictions of future impacts on the carbon cycle and the associated feedbacks to climate change. Article in Journal/Newspaper North Atlantic North Atlantic oscillation University of California: eScholarship Jules ENVELOPE(140.917,140.917,-66.742,-66.742) |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Earth Sciences Oceanography Climate Action Atmospheric Sciences Geochemistry Meteorology & Atmospheric Sciences Geoinformatics Climate change impacts and adaptation |
spellingShingle |
Earth Sciences Oceanography Climate Action Atmospheric Sciences Geochemistry Meteorology & Atmospheric Sciences Geoinformatics Climate change impacts and adaptation Parazoo, Nicholas C Barnes, Elizabeth Worden, John Harper, Anna B Bowman, Kevin B Frankenberg, Christian Wolf, Sebastian Litvak, Marcy Keenan, Trevor F Influence of ENSO and the NAO on terrestrial carbon uptake in the Texas‐northern Mexico region |
topic_facet |
Earth Sciences Oceanography Climate Action Atmospheric Sciences Geochemistry Meteorology & Atmospheric Sciences Geoinformatics Climate change impacts and adaptation |
description |
Climate extremes such as drought and heat waves can cause substantial reductions in terrestrial carbon uptake. Advancing projections of the carbon uptake response to future climate extremes depends on (1) identifying mechanistic links between the carbon cycle and atmospheric drivers, (2) detecting and attributing uptake changes, and (3) evaluating models of land response and atmospheric forcing. Here, we combine model simulations, remote sensing products, and ground observations to investigate the impact of climate variability on carbon uptake in the Texas-northern Mexico region. Specifically, we (1) examine the relationship between drought, carbon uptake, and variability of El Niño-Southern Oscillation (ENSO) and the North Atlantic Oscillation (NAO) using the Joint UK Land-Environment Simulator (JULES) biosphere simulations from 1950-2012, (2) quantify changes in carbon uptake during record drought conditions in 2011, and (3) evaluate JULES carbon uptake and soil moisture in 2011 using observations from remote sensing and a network of flux towers in the region. Long-term simulations reveal systematic decreases in regional-scale carbon uptake during negative phases of ENSO and NAO, including amplified reductions of gross primary production (GPP) (-0.42 ± 0.18 Pg C yr-1) and net ecosystem production (NEP) (-0.14 ± 0.11 Pg C yr-1) during strong La Niña years. The 2011 megadrought caused some of the largest declines of GPP (-0.50 Pg C yr-1) and NEP (-0.23 Pg C yr-1) in our simulations. In 2011, consistent declines were found in observations, including high correlation of GPP and surface soil moisture (r = 0.82 ± 0.23, p = 0.012) in remote sensing-based products. These results suggest a large-scale response of carbon uptake to ENSO and NAO, and highlight a need to improve model predictions of ENSO and NAO in order to improve predictions of future impacts on the carbon cycle and the associated feedbacks to climate change. |
format |
Article in Journal/Newspaper |
author |
Parazoo, Nicholas C Barnes, Elizabeth Worden, John Harper, Anna B Bowman, Kevin B Frankenberg, Christian Wolf, Sebastian Litvak, Marcy Keenan, Trevor F |
author_facet |
Parazoo, Nicholas C Barnes, Elizabeth Worden, John Harper, Anna B Bowman, Kevin B Frankenberg, Christian Wolf, Sebastian Litvak, Marcy Keenan, Trevor F |
author_sort |
Parazoo, Nicholas C |
title |
Influence of ENSO and the NAO on terrestrial carbon uptake in the Texas‐northern Mexico region |
title_short |
Influence of ENSO and the NAO on terrestrial carbon uptake in the Texas‐northern Mexico region |
title_full |
Influence of ENSO and the NAO on terrestrial carbon uptake in the Texas‐northern Mexico region |
title_fullStr |
Influence of ENSO and the NAO on terrestrial carbon uptake in the Texas‐northern Mexico region |
title_full_unstemmed |
Influence of ENSO and the NAO on terrestrial carbon uptake in the Texas‐northern Mexico region |
title_sort |
influence of enso and the nao on terrestrial carbon uptake in the texas‐northern mexico region |
publisher |
eScholarship, University of California |
publishDate |
2015 |
url |
https://escholarship.org/uc/item/5rd65831 |
op_coverage |
1247 - 1265 |
long_lat |
ENVELOPE(140.917,140.917,-66.742,-66.742) |
geographic |
Jules |
geographic_facet |
Jules |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Global Biogeochemical Cycles, vol 29, iss 8 |
op_relation |
qt5rd65831 https://escholarship.org/uc/item/5rd65831 |
op_rights |
public |
_version_ |
1787426797387776000 |