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Net primary productivity in Kazakhstan, its spatio-temporal patterns and relation to meteorological variables

Eisfelder, Christina and Klein, Igor and Niklaus, Markus and Künzer, Claudia (2014) Net primary productivity in Kazakhstan, its spatio-temporal patterns and relation to meteorological variables. Journal of Arid Environments, 103, pp. 17-30. Elsevier. ISSN 0140-1963

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Official URL: http://authors.elsevier.com/sd/article/S0140196313002346

Abstract

Arid and semiarid environments are susceptible to environmental degradation and desertification. Modelling net primary productivity (NPP) and analysis of spatio-temporal patterns help to understand ecological functioning especially in these areas. In this study, we apply the Biosphere Energy Transfer Hydrology Model (BETHY/DLR) to derive NPP for Kazakhstan for 2003-2011. Results are analyzed regarding spatial, monthly, and inter-annual variations. Mean annual NPP for Kazakhstan is 143 g C m2 and maximum productivity is reached in June. Most monthly NPP anomalies occur in semiarid North of Kazakhstan. These regions seem to be most strongly affected by changes in meteorology and are likely to be vulnerable to changing climate. Arid ecosystems show lower inter-annual NPP variability than semiarid lands. Correlations between NPP and meteorological parameters reveal variable influence of temperature, PAR, and precipitation on vegetation productivity during the year. Reaction of vegetation growth to precipitation is delayed 1-2 months. Temperature is most critical in spring and precipitation in summer affects NPP in August-October. The results presented in this study help to identify regions that are vulnerable to global change. They allow predictions on possible effects of expected future climate change on vegetation productivity in arid and semiarid Kazakhstan and support sustainable land management.

Item URL in elib:https://elib.dlr.de/87953/
Document Type:Article
Title:Net primary productivity in Kazakhstan, its spatio-temporal patterns and relation to meteorological variables
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Eisfelder, Christinachristina.eisfelder (at) dlr.deUNSPECIFIED
Klein, Igorigor.klein (at) dlr.deUNSPECIFIED
Niklaus, MarkusUNSPECIFIEDUNSPECIFIED
Künzer, Claudiaclaudia.kuenzer (at) dlr.deUNSPECIFIED
Date:2014
Journal or Publication Title:Journal of Arid Environments
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:103
Page Range:pp. 17-30
Publisher:Elsevier
ISSN:0140-1963
Status:Published
Keywords:Net primary productivity, vegetation dynamics, arid regions, semiarid regions, Kazakhstan, time-series analyses
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Fernerkundung der Landoberfläche (old)
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Land Surface
Deposited By: Eisfelder, Christina
Deposited On:29 Jan 2014 08:41
Last Modified:31 Jul 2019 19:45

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