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New constraints on the Amazonian carbon balance from airborne observations of the stable isotopes of CO2

Total Cost €


EC-Contrib. €






 ASICA project word cloud

Explore the words cloud of the ASICA project. It provides you a very rough idea of what is the project "ASICA" about.

break    scarce    magnitude    forest    understand    2005    science    question    drought    almost    isotopes    measuring    plant    contact    leveraging    sup3    metrics    droughts    coming    gross    amazon    discovery    renowned    13c    answer    breakthroughs    sup1    amazonia    17o    carbon    observation    ground    predicted    leaf    estimate    square    fuel    ratios    annual    18o    stomata    observations    soil    dangerous    inference    co2    intensities    twice    biosphere    amazonian    carbontracker    terrestrial    air    7000    emissions    16o    gpp    suggests    atmospheric    impossible    kilometers    modeling    removed    2010    caused    basin    moisture    climate    stable    regime    builds    balance    vary    delta    relative    deficits    variations    primary    water    cycle    scales    severe    though    span    inside    burning    interpretation    intense    monitoring    anomaly    efficiency    facilitated    vegetation    integrating    atmosphere    scientific    millions    pan    plants    anomalous    first    fossil    numerical    individual    decades    consensus    brazil    basic    precisely    exchange    hence    aircraft    quantitative    stratosphere    possibility    sensitivity   

Project "ASICA" data sheet

The following table provides information about the project.


Organization address
postcode: 6708 PB

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Netherlands [NL]
 Project website
 Total cost 2˙269˙688 €
 EC max contribution 2˙269˙688 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2014-CoG
 Funding Scheme ERC-COG
 Starting year 2015
 Duration (year-month-day) from 2015-09-01   to  2020-08-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    WAGENINGEN UNIVERSITY NL (WAGENINGEN) coordinator 827˙975.00
3    UNIVERSITEIT UTRECHT NL (UTRECHT) participant 296˙409.00
5    UNIVERSITY OF LEEDS UK (LEEDS) participant 68˙735.00


 Project objective

Severe droughts in Amazonia in 2005 and 2010 caused widespread loss of carbon from the terrestrial biosphere. This loss, almost twice the annual fossil fuel CO2 emissions in the EU, suggests a large sensitivity of the Amazonian carbon balance to a predicted more intense drought regime in the next decades. This is a dangerous inference though, as there is no scientific consensus on the most basic metrics of Amazonian carbon exchange: the gross primary production (GPP) and its response to moisture deficits in the soil and atmosphere. Measuring them on scales that span the whole Amazon forest was thus far impossible, but in this project I aim to deliver the first observation-based estimate of pan-Amazonian GPP and its drought induced variations. My program builds on two recent breakthroughs in our use of stable isotopes (13C, 17O, 18O) in atmospheric CO2: (1) Our discovery that observed δ¹³C in CO2 in the atmosphere is a quantitative measure for vegetation water-use efficiency over millions of square kilometers, integrating the drought response of individual plants. (2) The possibility to precisely measure the relative ratios of 18O/16O and 17O/16O in CO2, called Δ17O. Anomalous Δ17O values are present in air coming down from the stratosphere, but this anomaly is removed upon contact of CO2 with leaf water inside plant stomata. Hence, observed Δ17O values depend directly on the magnitude of GPP. Both δ¹³C and Δ17O measurements are scarce over the Amazon-basin, and I propose more than 7000 new measurements leveraging an established aircraft monitoring program in Brazil. Quantitative interpretation of these observations will break new ground in our use of stable isotopes to understand climate variations, and is facilitated by our renowned numerical modeling system “CarbonTracker”. My program will answer two burning question in carbon cycle science today: (a) What is the magnitude of GPP in Amazonia? And (b) How does it vary over different intensities of drought?


year authors and title journal last update
List of publications.
2019 Getachew A. Adnew, Magdalena E.G. Hofmann, Dipayan Paul, Amzad Laskar, Jakub Surma, Nina Albrecht, Andreas Pack, Johannes Schwieters, Gerbrand Koren, Wouter Peters, Thomas Röckmann
Determination of the triple oxygen and carbon isotopic composition of CO 2 from atomic ion fragments formed in the ion source of the 253 Ultra high‐resolution isotope ratio mass spectrometer
published pages: 1363-1380, ISSN: 0951-4198, DOI: 10.1002/rcm.8478
Rapid Communications in Mass Spectrometry 33/17 2020-03-20
2019 Gerbrand Koren, Linda Schneider, Ivar R. van der Velde, Erik van Schaik, Sergey S. Gromov, Getachew A. Adnew, Dorota J. Mrozek Martino, Magdalena E. G. Hofmann, Mao-Chang Liang, Sasadhar Mahata, Peter Bergamaschi, Ingrid T. van der Laan-Luijkx, Maarten C. Krol, Thomas Röckmann, Wouter Peters
Global 3-D Simulations of the Triple Oxygen Isotope Signature Δ 17 O in Atmospheric CO 2
published pages: , ISSN: 2169-897X, DOI: 10.1029/2019jd030387
Journal of Geophysical Research: Atmospheres 2020-03-20
2017 I. T. van der Laan-Luijkx; I. T. van der Laan-Luijkx; I. R. van der Velde; I. R. van der Velde; I. R. van der Velde; I. R. van der Velde; E. van der Veen; A. Tsuruta; K. Stanislawska; A. Babenhauserheide; H. F. Zhang; H. F. Zhang; Y. Liu; W. He; W. He; H. Chen; H. Chen; K. A. Masarie; K. A. Masarie; M. C. Krol; M. C. Krol; M. C. Krol; W. Peters; W. Peters
The CarbonTracker Data Assimilation Shell (CTDAS) v1.0: implementation and global carbon balance 2001–2015
published pages: , ISSN: 1991-959X, DOI: 10.5445/IR/1000073025
VOLUME=10;ISSUE=7;STARTPAGE=2785;ENDPAGE=2800;ISSN=1991-959X;TITLE=Geoscientific Model Development 1 2020-03-20
2018 Wouter Peters, Ivar R. van der Velde, Erik van Schaik, John B. Miller, Philippe Ciais, Henrique F. Duarte, Ingrid T. van der Laan-Luijkx, Michiel K. van der Molen, Marko Scholze, Kevin Schaefer, Pier Luigi Vidale, Anne Verhoef, David WÃ¥rlind, Dan Zhu, Pieter P. Tans, Bruce Vaughn, James W. C. White
Increased water-use efficiency and reduced CO2 uptake by plants during droughts at a continental scale
published pages: 744-748, ISSN: 1752-0894, DOI: 10.1038/s41561-018-0212-7
Nature Geoscience 11/10 2020-03-20
2018 Wei He, Ivar R. van der Velde, Arlyn E. Andrews, Colm Sweeney, John Miller, Pieter Tans, Ingrid T. van der Laan-Luijkx, Thomas Nehrkorn, Marikate Mountain, Weimin Ju, Wouter Peters, Huilin Chen
CTDAS-Lagrange v1.0: A high-resolution data assimilation system for regional carbon dioxide observations
published pages: 1-41, ISSN: 1991-962X, DOI: 10.5194/gmd-2017-222
Geoscientific Model Development Discussions 2020-03-20

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