{"id":2639,"date":"2020-11-24T14:38:39","date_gmt":"2020-11-24T17:38:39","guid":{"rendered":"http:\/\/www.ccst.inpe.br\/lagee\/?p=2639"},"modified":"2020-11-24T14:38:42","modified_gmt":"2020-11-24T17:38:42","slug":"a-global-synthesis-inversion-analysis-of-recent-variability-in-co2-fluxes-using-gosat-and-in-situ-observations","status":"publish","type":"post","link":"https:\/\/www.ccst.inpe.br\/lagee\/a-global-synthesis-inversion-analysis-of-recent-variability-in-co2-fluxes-using-gosat-and-in-situ-observations\/","title":{"rendered":"A global synthesis inversion analysis of recent variability in CO2 fluxes using GOSAT and in situ observations"},"content":{"rendered":"\n<p><strong>Autores:<\/strong>  Wang, J. S. ; Kawa, S. R.; Collatz, G. J.; Sasakawa, M.; Gatti, L. V.; Machida, T.; Liu, Y.; Manyin, M. E.<\/p>\n\n\n\n<p><strong>Link do artigo: <\/strong><a rel=\"noreferrer noopener\" aria-label=\" (abre numa nova aba)\" href=\"https:\/\/acp.copernicus.org\/articles\/18\/11097\/2018\/\" target=\"_blank\">https:\/\/acp.copernicus.org\/articles\/18\/11097\/2018\/<\/a><\/p>\n\n\n\n<p><strong>Revista<\/strong>: Atmospheric Chemistry and Physics, 2018.<\/p>\n\n\n\n<p><strong>Abstract:<\/strong>  <br>The precise contribution of the two major sinks for anthropogenic\u00a0CO<sub>2<\/sub>\u00a0emissions, terrestrial vegetation and the ocean, and their location and year-to-year variability are not well understood. Top-down estimates of the spatiotemporal variations in emissions and uptake of\u00a0CO<sub>2<\/sub>\u00a0are expected to benefit from the increasing measurement density brought by recent in situ and remote\u00a0CO<sub>2<\/sub>\u00a0observations. We uniquely apply a batch Bayesian synthesis inversion at relatively high resolution to in situ surface observations and bias-corrected GOSAT satellite column\u00a0CO<sub>2<\/sub>\u00a0retrievals to deduce the global distributions of natural\u00a0CO<sub>2<\/sub>\u00a0fluxes during 2009\u20132010. The GOSAT inversion is generally better constrained than the in situ inversion, with smaller posterior regional flux uncertainties and correlations, because of greater spatial coverage, except over North America and northern and southern high-latitude oceans. Complementarity of the in\u00a0situ and GOSAT data enhances uncertainty reductions in a joint inversion; however, remaining coverage gaps, including those associated with spatial and temporal sampling biases in the passive satellite measurements, still limit the ability to accurately resolve fluxes down to the sub-continental or sub-ocean basin scale. The GOSAT inversion produces a shift in the global\u00a0CO<sub>2<\/sub>\u00a0sink from the tropics to the north and south relative to the prior, and an increased source in the tropics of\u00a0\u223c\u20092\u2009Pg\u2009C\u2009yr<sup>\u22121<\/sup>\u00a0relative to the in\u00a0situ inversion, similar to what is seen in studies using other inversion approaches. This result may be driven by sampling and residual retrieval biases in the GOSAT data, as suggested by significant discrepancies between posterior\u00a0CO<sub>2<\/sub>\u00a0distributions and surface in\u00a0situ and HIPPO mission aircraft data. While the shift in the global sink appears to be a robust feature of the inversions, the partitioning of the sink between land and ocean in the inversions using either in\u00a0situ or GOSAT data is found to be sensitive to prior uncertainties because of negative correlations in the flux errors. The GOSAT inversion indicates significantly less\u00a0CO<sub>2<\/sub>\u00a0uptake in the summer of 2010 than in 2009 across northern regions, consistent with the impact of observed severe heat waves and drought. However, observations from an in\u00a0situ network in Siberia imply that the GOSAT inversion exaggerates the 2010\u20132009 difference in uptake in that region, while the prior CASA-GFED model of net ecosystem production and fire emissions reasonably estimates that quantity. The prior, in\u00a0situ posterior, and GOSAT posterior all indicate greater uptake over North America in spring to early summer of 2010 than in 2009, consistent with wetter conditions. The GOSAT inversion does not show the expected impact on fluxes of a 2010 drought in the Amazon; evaluation of posterior mole fractions against local aircraft profiles suggests that time-varying GOSAT coverage can bias the estimation of interannual flux variability in this region. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>Autores: Wang, J. S. ; Kawa, S. R.; Collatz, G. J.; Sasakawa, M.; Gatti, L. V.; Machida, T.; Liu, Y.; Manyin, M. E. Link do artigo: https:\/\/acp.copernicus.org\/articles\/18\/11097\/2018\/ Revista: Atmospheric Chemistry and Physics, 2018. Abstract: The precise contribution of the two major sinks for anthropogenic\u00a0CO2\u00a0emissions, terrestrial vegetation and the ocean, and their location and year-to-year variability [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-2639","post","type-post","status-publish","format-standard","hentry","category-publicacoes"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>A global synthesis inversion analysis of recent variability in CO2 fluxes using GOSAT and in situ observations - Projeto Lagee<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ccst.inpe.br\/lagee\/a-global-synthesis-inversion-analysis-of-recent-variability-in-co2-fluxes-using-gosat-and-in-situ-observations\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"A global synthesis inversion analysis of recent variability in CO2 fluxes using GOSAT and in situ observations - Projeto Lagee\" \/>\n<meta property=\"og:description\" content=\"Autores: Wang, J. S. ; Kawa, S. R.; Collatz, G. J.; Sasakawa, M.; Gatti, L. V.; Machida, T.; Liu, Y.; Manyin, M. E. Link do artigo: https:\/\/acp.copernicus.org\/articles\/18\/11097\/2018\/ Revista: Atmospheric Chemistry and Physics, 2018. 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