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LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00004279naa a2200493 4500
001oai:lup.lub.lu.se:52bb7da3-ec84-41af-bb1a-76ff3cc07e06
003SwePub
008160401s2010 | |||||||||||000 ||eng|
0247 a https://lup.lub.lu.se/record/15707852 URI
0247 a https://doi.org/10.1111/j.1365-2486.2009.01991.x2 DOI
040 a (SwePub)lu
041 a engb eng
042 9 SwePub
072 7a art2 swepub-publicationtype
072 7a ref2 swepub-contenttype
1001 a Schwalm, Christopher R.4 aut
2451 0a Assimilation exceeds respiration sensitivity to drought: A FLUXNET synthesis
264 1b Wiley,c 2010
520 a The intensification of the hydrological cycle, with an observed and modeled increase in drought incidence and severity, underscores the need to quantify drought effects on carbon cycling and the terrestrial sink. FLUXNET, a global network of eddy covariance towers, provides dense data streams of meteorological data, and through flux partitioning and gap filling algorithms, estimates of net ecosystem productivity (F-NEP), gross ecosystem productivity (P), and ecosystem respiration (R). We analyzed the functional relationship of these three carbon fluxes relative to evaporative fraction (EF), an index of drought and site water status, using monthly data records from 238 micrometeorological tower sites distributed globally across 11 biomes. The analysis was based on relative anomalies of both EF and carbon fluxes and focused on drought episodes by biome and climatic season. Globally P was approximate to 50% more sensitive to a drought event than R. Network-wide drought-induced decreases in carbon flux averaged -16.6 and -9.3 g C m-2 month-1 for P and R, i.e., drought events induced a net decline in the terrestrial sink. However, in evergreen forests and wetlands drought was coincident with an increase in P or R during parts of the growing season. The most robust relationships between carbon flux and EF occurred during climatic spring for F-NEP and in climatic summer for P and R. Upscaling flux sensitivities to a global map showed that spatial patterns for all three carbon fluxes were linked to the distribution of croplands. Agricultural areas exhibited the highest sensitivity whereas the tropical region had minimal sensitivity to drought. Combining gridded flux sensitivities with their uncertainties and the spatial grid of FLUXNET revealed that a more robust quantification of carbon flux response to drought requires additional towers in all biomes of Africa and Asia as well as in the cropland, shrubland, savannah, and wetland biomes globally.
650 7a NATURVETENSKAPx Geovetenskap och miljövetenskapx Naturgeografi0 (SwePub)105072 hsv//swe
650 7a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Physical Geography0 (SwePub)105072 hsv//eng
653 a evaporative fraction
653 a eddy covariance
653 a drought
653 a biome
653 a carbon cycling
653 a FLUXNET
653 a synthesis
7001 a Williams, Christopher A.4 aut
7001 a Schaefer, Kevin4 aut
7001 a Arneth, Almutu Lund University,Lunds universitet,Institutionen för naturgeografi och ekosystemvetenskap,Naturvetenskapliga fakulteten,Dept of Physical Geography and Ecosystem Science,Faculty of Science4 aut0 (Swepub:lu)nate-aar
7001 a Bonal, Damien4 aut
7001 a Buchmann, Nina4 aut
7001 a Chen, Jiquan4 aut
7001 a Law, Beverly E.4 aut
7001 a Lindroth, Andersu Lund University,Lunds universitet,Institutionen för naturgeografi och ekosystemvetenskap,Naturvetenskapliga fakulteten,Dept of Physical Geography and Ecosystem Science,Faculty of Science4 aut0 (Swepub:lu)ngeo-ali
7001 a Luyssaert, Sebastiaan4 aut
7001 a Reichstein, Markus4 aut
7001 a Richardson, Andrew D.4 aut
7102 a Institutionen för naturgeografi och ekosystemvetenskapb Naturvetenskapliga fakulteten4 org
7730 t Global Change Biologyd : Wileyg 16:2, s. 657-670q 16:2<657-670x 1354-1013x 1365-2486
8564 u http://dx.doi.org/10.1111/j.1365-2486.2009.01991.xy FULLTEXT
8564 8u https://lup.lub.lu.se/record/1570785
8564 8u https://doi.org/10.1111/j.1365-2486.2009.01991.x

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