2020
DOI: 10.5194/amt-13-4295-2020
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Improved SIFTER v2 algorithm for long-term GOME-2A satellite retrievals of fluorescence with a correction for instrument degradation

Abstract: Abstract. Solar-induced fluorescence (SIF) data from satellites are increasingly used as a proxy for photosynthetic activity by vegetation and as a constraint on gross primary production. Here we report on improvements in the algorithm to retrieve mid-morning (09:30 LT) SIF estimates on the global scale from the GOME-2 sensor on the MetOp-A satellite (GOME-2A) for the period 2007–2019. Our new SIFTER (Sun-Induced Fluorescence of Terrestrial Ecosystems Retrieval) v2 algorithm improves over a previous version by… Show more

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Cited by 19 publications
(22 citation statements)
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“…Socioeconomic factors, such as industrialization and farming activities, could alter both pollution and agricultural productivity across the study region, which might confound the spatial relationship between SIF and AOD. In addition, the current algorithm employed for GOME‐2 SIF retrieval cannot completely eliminate the impacts of aerosol on the transmission of SIF through the atmosphere (van Schaik et al., 2020). Moreover, the overpass time of GOME‐2 is drifting toward the early morning, when plants are less stressed and inclined solar angles increase the diffuse radiation fraction.…”
Section: Discussionmentioning
confidence: 99%
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“…Socioeconomic factors, such as industrialization and farming activities, could alter both pollution and agricultural productivity across the study region, which might confound the spatial relationship between SIF and AOD. In addition, the current algorithm employed for GOME‐2 SIF retrieval cannot completely eliminate the impacts of aerosol on the transmission of SIF through the atmosphere (van Schaik et al., 2020). Moreover, the overpass time of GOME‐2 is drifting toward the early morning, when plants are less stressed and inclined solar angles increase the diffuse radiation fraction.…”
Section: Discussionmentioning
confidence: 99%
“…Solar‐induced chlorophyll fluorescence (SIF), which has been suggested to be a direct proxy of ecosystem photosynthesis, especially for heavily managed agricultural ecosystems, was used to approximate ecosystem photosynthetic activity of the croplands (Guanter et al., 2014; Miao et al., 2018, 2020; Sun et al., 2017). We used the new long‐term GOME‐2A SIF data set with SIFTER v2 algorithm, which corrected the instrument degradation of GOME‐2A satellite (Kooreman et al., ; van Schaik et al., 2020). SIF retrievals at daily scale were prescreened to exclude data with cloud fraction ≥ 0.4 (van Schaik et al., 2020).…”
Section: Methodsmentioning
confidence: 99%
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“…In determining African net ecosystem exchange (NEE), GPP was more important than total ecosystem respiration (TER) (Ciais et al, 2011;Ardö, 2015). It dominates the interannual variability in the terrestrial ecosystem carbon uptake, and as a consequence of fertilization, it is likely to continue its substantial increase and play an important role in carbon-climate coupling (Vermote et al, 1997;Friedlingstein et al, 2019). Therefore, quantification of the spatiotemporal variations in GPP is important to assess biogeochemical cycling in the terrestrial biosphere, ecosystem functioning, carbon budgets, and food production in the context of global climate change.…”
Section: Introductionmentioning
confidence: 99%
“…Since then, a number of global SIF datasets have been produced from spaceborne spectrometers originally intended for atmospheric research, such as GOME-2 (e.g. Joiner et al, 2013;Köhler et al, 2014;van Schaik et al, 2020), SCIAMACHY (Köhler et al, 2014;Khosravi et al, 2015;Joiner et al, 2016), OCO-2 (e.g. Frankenberg et al, 2014;Sun et al, 2018), and TanSat (e.g.…”
Section: Introductionmentioning
confidence: 99%