On the ability of space‐based passive and active remote sensing observations of CO2 to detect flux perturbations to the carbon cycle
Space-borne observations of CO2 are vital to gaining understanding of the carbon cycle in regions of the world that are difficult to measure directly, such as the tropical terrestrial biosphere, the high northern and southern latitudes, and in developing nations such as China. Measurements from pass...
Published in: | Journal of Geophysical Research: Atmospheres |
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Language: | English |
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2018
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Online Access: | https://doi.org/10.1002/2017JD027836 |
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ftncar:oai:drupal-site.org:articles_21392 2023-09-05T13:22:33+02:00 On the ability of space‐based passive and active remote sensing observations of CO2 to detect flux perturbations to the carbon cycle Crowell, Sean M. R. (author) Randolph Kawa, S. (author) Browell, Edward V. (author) Hammerling, Dorit M. (author) Moore, Berrien (author) Schaefer, Kevin (author) Doney, Scott C. (author) 2018-01-29 https://doi.org/10.1002/2017JD027836 en eng Journal of Geophysical Research: Atmospheres--J. Geophys. Res. Atmos.--2169897X articles:21392 ark:/85065/d7th8qcd doi:10.1002/2017JD027836 Copyright 2018 American Geophysical Union. article Text 2018 ftncar https://doi.org/10.1002/2017JD027836 2023-08-14T18:48:05Z Space-borne observations of CO2 are vital to gaining understanding of the carbon cycle in regions of the world that are difficult to measure directly, such as the tropical terrestrial biosphere, the high northern and southern latitudes, and in developing nations such as China. Measurements from passive instruments such as GOSAT and OCO-2, however, are constrained by solar zenith angle limitations as well as sensitivity to the presence of clouds and aerosols. Active measurements such as those in development for the Active Sensing of CO2 Emissions over Nights, Days and Seasons (ASCENDS) mission show strong potential for making measurements in the high-latitude winter and in cloudy regions. In this work we examine the enhanced flux constraint provided by the improved coverage from an active measurement such as ASCENDS. The simulation studies presented here show that with sufficient precision, ASCENDS will detect permafrost thaw and fossil fuel emissions shifts at annual and seasonal time scales, even in the presence of transport errors, representativeness errors, and biogenic flux errors. While OCO-2 can detect some of these perturbations at the annual scale, the seasonal sampling provided by ASCENDS provides the stronger constraint. Article in Journal/Newspaper permafrost OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Journal of Geophysical Research: Atmospheres 123 2 1460 1477 |
institution |
Open Polar |
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OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
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ftncar |
language |
English |
description |
Space-borne observations of CO2 are vital to gaining understanding of the carbon cycle in regions of the world that are difficult to measure directly, such as the tropical terrestrial biosphere, the high northern and southern latitudes, and in developing nations such as China. Measurements from passive instruments such as GOSAT and OCO-2, however, are constrained by solar zenith angle limitations as well as sensitivity to the presence of clouds and aerosols. Active measurements such as those in development for the Active Sensing of CO2 Emissions over Nights, Days and Seasons (ASCENDS) mission show strong potential for making measurements in the high-latitude winter and in cloudy regions. In this work we examine the enhanced flux constraint provided by the improved coverage from an active measurement such as ASCENDS. The simulation studies presented here show that with sufficient precision, ASCENDS will detect permafrost thaw and fossil fuel emissions shifts at annual and seasonal time scales, even in the presence of transport errors, representativeness errors, and biogenic flux errors. While OCO-2 can detect some of these perturbations at the annual scale, the seasonal sampling provided by ASCENDS provides the stronger constraint. |
author2 |
Crowell, Sean M. R. (author) Randolph Kawa, S. (author) Browell, Edward V. (author) Hammerling, Dorit M. (author) Moore, Berrien (author) Schaefer, Kevin (author) Doney, Scott C. (author) |
format |
Article in Journal/Newspaper |
title |
On the ability of space‐based passive and active remote sensing observations of CO2 to detect flux perturbations to the carbon cycle |
spellingShingle |
On the ability of space‐based passive and active remote sensing observations of CO2 to detect flux perturbations to the carbon cycle |
title_short |
On the ability of space‐based passive and active remote sensing observations of CO2 to detect flux perturbations to the carbon cycle |
title_full |
On the ability of space‐based passive and active remote sensing observations of CO2 to detect flux perturbations to the carbon cycle |
title_fullStr |
On the ability of space‐based passive and active remote sensing observations of CO2 to detect flux perturbations to the carbon cycle |
title_full_unstemmed |
On the ability of space‐based passive and active remote sensing observations of CO2 to detect flux perturbations to the carbon cycle |
title_sort |
on the ability of space‐based passive and active remote sensing observations of co2 to detect flux perturbations to the carbon cycle |
publishDate |
2018 |
url |
https://doi.org/10.1002/2017JD027836 |
genre |
permafrost |
genre_facet |
permafrost |
op_relation |
Journal of Geophysical Research: Atmospheres--J. Geophys. Res. Atmos.--2169897X articles:21392 ark:/85065/d7th8qcd doi:10.1002/2017JD027836 |
op_rights |
Copyright 2018 American Geophysical Union. |
op_doi |
https://doi.org/10.1002/2017JD027836 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
123 |
container_issue |
2 |
container_start_page |
1460 |
op_container_end_page |
1477 |
_version_ |
1776203063011311616 |