Spatial distributions of X CO 2 seasonal cycle amplitude and phase over northern high-latitude regions
Satellite-based observations of atmospheric carbon dioxide (CO 2 ) provide measurements in remote regions, such as the biologically sensitive but undersampled northern high latitudes, and are progressing toward true global data coverage. Recent improvements in satellite retrievals of total column-av...
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ftosti:oai:osti.gov:1969231 2023-07-30T04:07:21+02:00 Spatial distributions of X CO 2 seasonal cycle amplitude and phase over northern high-latitude regions Jacobs, Nicole Simpson, William R. Graham, Kelly A. Holmes, Christopher Hase, Frank Blumenstock, Thomas Tu, Qiansi Frey, Matthias Dubey, Manvendra K. Parker, Harrison A. Wunch, Debra Kivi, Rigel Heikkinen, Pauli Notholt, Justus Petri, Christof Warneke, Thorsten 2023-04-24 application/pdf http://www.osti.gov/servlets/purl/1969231 https://www.osti.gov/biblio/1969231 https://doi.org/10.5194/acp-21-16661-2021 unknown http://www.osti.gov/servlets/purl/1969231 https://www.osti.gov/biblio/1969231 https://doi.org/10.5194/acp-21-16661-2021 doi:10.5194/acp-21-16661-2021 54 ENVIRONMENTAL SCIENCES 2023 ftosti https://doi.org/10.5194/acp-21-16661-2021 2023-07-11T10:26:28Z Satellite-based observations of atmospheric carbon dioxide (CO 2 ) provide measurements in remote regions, such as the biologically sensitive but undersampled northern high latitudes, and are progressing toward true global data coverage. Recent improvements in satellite retrievals of total column-averaged dry air mole fractions of CO 2 (X CO 2 ) from the NASA Orbiting Carbon Observatory 2 (OCO-2) have allowed for unprecedented data coverage of northern high-latitude regions, while maintaining acceptable accuracy and consistency relative to ground-based observations, and finally providing sufficient data in spring and autumn for analysis of satellite-observed X CO 2 seasonal cycles across a majority of terrestrial northern high-latitude regions. Here, we present an analysis of X CO 2 seasonal cycles calculated from OCO-2 data for temperate, boreal, and tundra regions, subdivided into 5° latitude by 20° longitude zones. We quantify the seasonal cycle amplitudes (SCAs) and the annual half drawdown day (HDD). OCO-2 SCAs are in good agreement with ground-based observations at five high-latitude sites, and OCO-2 SCAs show very close agreement with SCAs calculated for model estimates of X CO 2 from the Copernicus Atmosphere Monitoring Services (CAMS) global inversion-optimized greenhouse gas flux model v19r1 and the CarbonTracker2019 model (CT2019B). Model estimates of X CO 2 from the GEOS-Chem CO 2 simulation version 12.7.2 with underlying biospheric fluxes from CarbonTracker2019 (GC-CT2019) yield SCAs of larger magnitude and spread over a larger range than those from CAMS, CT2019B, or OCO-2; however, GC-CT2019 SCAs still exhibit a very similar spatial distribution across northern high-latitude regions to that from CAMS, CT2019B, and OCO-2. Zones in the Asian boreal forest were found to have exceptionally large SCA and early HDD, and both OCO-2 data and model estimates yield a distinct longitudinal gradient of increasing SCA from west to east across the Eurasian continent. In northern high-latitude regions, spanning ... Other/Unknown Material Tundra SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Atmospheric Chemistry and Physics 21 22 16661 16687 |
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Open Polar |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
54 ENVIRONMENTAL SCIENCES |
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54 ENVIRONMENTAL SCIENCES Jacobs, Nicole Simpson, William R. Graham, Kelly A. Holmes, Christopher Hase, Frank Blumenstock, Thomas Tu, Qiansi Frey, Matthias Dubey, Manvendra K. Parker, Harrison A. Wunch, Debra Kivi, Rigel Heikkinen, Pauli Notholt, Justus Petri, Christof Warneke, Thorsten Spatial distributions of X CO 2 seasonal cycle amplitude and phase over northern high-latitude regions |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
Satellite-based observations of atmospheric carbon dioxide (CO 2 ) provide measurements in remote regions, such as the biologically sensitive but undersampled northern high latitudes, and are progressing toward true global data coverage. Recent improvements in satellite retrievals of total column-averaged dry air mole fractions of CO 2 (X CO 2 ) from the NASA Orbiting Carbon Observatory 2 (OCO-2) have allowed for unprecedented data coverage of northern high-latitude regions, while maintaining acceptable accuracy and consistency relative to ground-based observations, and finally providing sufficient data in spring and autumn for analysis of satellite-observed X CO 2 seasonal cycles across a majority of terrestrial northern high-latitude regions. Here, we present an analysis of X CO 2 seasonal cycles calculated from OCO-2 data for temperate, boreal, and tundra regions, subdivided into 5° latitude by 20° longitude zones. We quantify the seasonal cycle amplitudes (SCAs) and the annual half drawdown day (HDD). OCO-2 SCAs are in good agreement with ground-based observations at five high-latitude sites, and OCO-2 SCAs show very close agreement with SCAs calculated for model estimates of X CO 2 from the Copernicus Atmosphere Monitoring Services (CAMS) global inversion-optimized greenhouse gas flux model v19r1 and the CarbonTracker2019 model (CT2019B). Model estimates of X CO 2 from the GEOS-Chem CO 2 simulation version 12.7.2 with underlying biospheric fluxes from CarbonTracker2019 (GC-CT2019) yield SCAs of larger magnitude and spread over a larger range than those from CAMS, CT2019B, or OCO-2; however, GC-CT2019 SCAs still exhibit a very similar spatial distribution across northern high-latitude regions to that from CAMS, CT2019B, and OCO-2. Zones in the Asian boreal forest were found to have exceptionally large SCA and early HDD, and both OCO-2 data and model estimates yield a distinct longitudinal gradient of increasing SCA from west to east across the Eurasian continent. In northern high-latitude regions, spanning ... |
author |
Jacobs, Nicole Simpson, William R. Graham, Kelly A. Holmes, Christopher Hase, Frank Blumenstock, Thomas Tu, Qiansi Frey, Matthias Dubey, Manvendra K. Parker, Harrison A. Wunch, Debra Kivi, Rigel Heikkinen, Pauli Notholt, Justus Petri, Christof Warneke, Thorsten |
author_facet |
Jacobs, Nicole Simpson, William R. Graham, Kelly A. Holmes, Christopher Hase, Frank Blumenstock, Thomas Tu, Qiansi Frey, Matthias Dubey, Manvendra K. Parker, Harrison A. Wunch, Debra Kivi, Rigel Heikkinen, Pauli Notholt, Justus Petri, Christof Warneke, Thorsten |
author_sort |
Jacobs, Nicole |
title |
Spatial distributions of X CO 2 seasonal cycle amplitude and phase over northern high-latitude regions |
title_short |
Spatial distributions of X CO 2 seasonal cycle amplitude and phase over northern high-latitude regions |
title_full |
Spatial distributions of X CO 2 seasonal cycle amplitude and phase over northern high-latitude regions |
title_fullStr |
Spatial distributions of X CO 2 seasonal cycle amplitude and phase over northern high-latitude regions |
title_full_unstemmed |
Spatial distributions of X CO 2 seasonal cycle amplitude and phase over northern high-latitude regions |
title_sort |
spatial distributions of x co 2 seasonal cycle amplitude and phase over northern high-latitude regions |
publishDate |
2023 |
url |
http://www.osti.gov/servlets/purl/1969231 https://www.osti.gov/biblio/1969231 https://doi.org/10.5194/acp-21-16661-2021 |
genre |
Tundra |
genre_facet |
Tundra |
op_relation |
http://www.osti.gov/servlets/purl/1969231 https://www.osti.gov/biblio/1969231 https://doi.org/10.5194/acp-21-16661-2021 doi:10.5194/acp-21-16661-2021 |
op_doi |
https://doi.org/10.5194/acp-21-16661-2021 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
21 |
container_issue |
22 |
container_start_page |
16661 |
op_container_end_page |
16687 |
_version_ |
1772820615339704320 |