Satellite-observed pantropical carbon dynamics
Lei Fan
(1)
,
Jean-Pierre Wigneron
(2)
,
Philippe Ciais
(3, 4)
,
Jérôme Chave
(5)
,
Martin Brandt
,
Rasmus Fensholt
(6)
,
Sassan Saatchi
(7)
,
Ana Bastos
(3)
,
Amen Al-Yaari
(2)
,
Koen Hufkens
,
Yuanwei Qin
,
Xiangming Xiao
,
Chi Chen
(8)
,
Ranga Myneni
(9)
,
Roberto Fernández-Morán
(10)
,
Arnaud Mialon
(11)
,
Nemesio Rodriguez‐fernandez
(12)
,
Yann H. Kerr
(12)
,
Feng Tian
(13)
,
Josep Penuelas
(14)
1
UMR ISPA -
Interactions Sol Plante Atmosphère
2 EPHYSE - Écologie fonctionnelle et physique de l'environnement
3 LSCE - Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette]
4 ICOS-ATC - ICOS-ATC
5 EDB - Evolution et Diversité Biologique
6 IGN - Department of Geosciences and Natural Resource Management [Copenhagen]
7 CALTECH - California Institute of Technology
8 National University of Defense Technology [China]
9 Department of Earth and Environment [Boston]
10 Department of Earth Physics and Thermodynamics [Valencia]
11 CARTEL - Centre d'Applications et de Recherches en TELédétection [Sherbrooke]
12 CESBIO - Centre d'études spatiales de la biosphère
13 THU - Tsinghua University [Beijing]
14 CREAF - Centre for Ecological Research and Applied Forestries = Centre de Recerca Ecologica i Aplicacions Forestals
2 EPHYSE - Écologie fonctionnelle et physique de l'environnement
3 LSCE - Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette]
4 ICOS-ATC - ICOS-ATC
5 EDB - Evolution et Diversité Biologique
6 IGN - Department of Geosciences and Natural Resource Management [Copenhagen]
7 CALTECH - California Institute of Technology
8 National University of Defense Technology [China]
9 Department of Earth and Environment [Boston]
10 Department of Earth Physics and Thermodynamics [Valencia]
11 CARTEL - Centre d'Applications et de Recherches en TELédétection [Sherbrooke]
12 CESBIO - Centre d'études spatiales de la biosphère
13 THU - Tsinghua University [Beijing]
14 CREAF - Centre for Ecological Research and Applied Forestries = Centre de Recerca Ecologica i Aplicacions Forestals
Jean-Pierre Wigneron
- Fonction : Auteur
- PersonId : 736098
- IdHAL : jean-pierre-wigneron
- ORCID : 0000-0001-5345-3618
- IdRef : 090178858
Philippe Ciais
- Fonction : Auteur
- PersonId : 756308
- ORCID : 0000-0001-8560-4943
- IdRef : 092241700
Jérôme Chave
- Fonction : Auteur
- PersonId : 180171
- IdHAL : jerome-chave
- ORCID : 0000-0002-7766-1347
- IdRef : 069913935
Martin Brandt
- Fonction : Auteur
- PersonId : 982093
Rasmus Fensholt
- Fonction : Auteur
- PersonId : 791486
- ORCID : 0000-0003-3067-4527
Ana Bastos
- Fonction : Auteur
- PersonId : 783776
- ORCID : 0000-0002-7368-7806
Amen Al-Yaari
- Fonction : Auteur
- PersonId : 1136662
Koen Hufkens
- Fonction : Auteur
Yuanwei Qin
- Fonction : Auteur
Xiangming Xiao
- Fonction : Auteur
Arnaud Mialon
- Fonction : Auteur
- PersonId : 737456
- IdHAL : arnaud-mialon
- ORCID : 0000-0001-7970-0701
- IdRef : 104518529
Nemesio Rodriguez‐fernandez
- Fonction : Auteur
- PersonId : 21349
- IdHAL : nemesio-rodriguez-fernandez
- ORCID : 0000-0003-3796-149X
- IdRef : 224630679
Yann H. Kerr
- Fonction : Auteur
- PersonId : 1150234
- IdHAL : yann-kerr
- ORCID : 0000-0001-6352-1717
- IdRef : 081995490
Josep Penuelas
- Fonction : Auteur
- PersonId : 765109
- ORCID : 0000-0002-7215-0150
Résumé
Changes in terrestrial tropical carbon stocks have an important role in the global carbon budget. However, current observational tools do not allow accurate and large-scale monitoring of the spatial distribution and dynamics of carbon stocks'. Here, we used low-frequency L-band passive microwave observations to compute a direct and spatially explicit quantification of annual aboveground carbon (AGC) fluxes and show that the tropical net AGC budget was approximately in balance during 2010 to 2017, the net budget being composed of gross losses of -2.86 PgC yr(-1) offset by gross gains of -2.97 PgC yr(-1) between continents. Large interannual and spatial fluctuations of tropical AGC were quantified during the wet 2011 La Nina year and throughout the extreme dry and warm 2015-2016 El Nino episode. These interannual fluctuations, controlled predominantly by semiarid biomes, were shown to be closely related to independent global atmospheric CO2 growth-rate anomalies (Pearson's r = 0.86), highlighting the pivotal role of tropical AGC in the global carbon budget.