A global analysis of the impact of drought on net primary productivity

T. Chen, G.R. van der Werf, R.A.M. de Jeu, G. Wang, A.J. Dolman

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

We investigated the impact of drought on interannual variability of net primary productivity (NPP) from 1997 to 2009, using the standardized precipitation evapotranspiration index (SPEI) drought index and satellite-derived vegetation greenness converted to NPP. SPEI is positive for wet conditions and negative for dry conditions. We found that SPEI and NPP were coupled and showed in-phase behaviour on a global scale. We then used the Köppen climate classification to study the SPEI-NPP relations regionally and found that while NPP and SPEI were positively related (high SPEI, high NPP) in arid and in seasonal dry regions, the opposite occurs in most boreal regions (high SPEI, low NPP). High intensity drought events, such as the 2003 drought in Europe were picked up by our analysis. Our findings suggest that the strong positive relation between global average moisture availability and NPP consists of a composite of the positive relation across dry regions and the coherent NPP decline during and after intensive drought events in humid regions. Importantly, we also found that there are many areas on the globe that show no strong correlation between drought and NPP. © Author(s) 2013. CC Attribution 3.0 License.
Original languageEnglish
Pages (from-to)3885-3894
JournalHydrology and Earth System Sciences
Volume17
DOIs
Publication statusPublished - 2013

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drought
productivity
evapotranspiration
arid region
climate classification
analysis
index
moisture
vegetation

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@article{751a1874d7db4abe9595bca7bac21ad6,
title = "A global analysis of the impact of drought on net primary productivity",
abstract = "We investigated the impact of drought on interannual variability of net primary productivity (NPP) from 1997 to 2009, using the standardized precipitation evapotranspiration index (SPEI) drought index and satellite-derived vegetation greenness converted to NPP. SPEI is positive for wet conditions and negative for dry conditions. We found that SPEI and NPP were coupled and showed in-phase behaviour on a global scale. We then used the K{\"o}ppen climate classification to study the SPEI-NPP relations regionally and found that while NPP and SPEI were positively related (high SPEI, high NPP) in arid and in seasonal dry regions, the opposite occurs in most boreal regions (high SPEI, low NPP). High intensity drought events, such as the 2003 drought in Europe were picked up by our analysis. Our findings suggest that the strong positive relation between global average moisture availability and NPP consists of a composite of the positive relation across dry regions and the coherent NPP decline during and after intensive drought events in humid regions. Importantly, we also found that there are many areas on the globe that show no strong correlation between drought and NPP. {\circledC} Author(s) 2013. CC Attribution 3.0 License.",
author = "T. Chen and {van der Werf}, G.R. and {de Jeu}, R.A.M. and G. Wang and A.J. Dolman",
year = "2013",
doi = "10.5194/hess-17-3885-2013",
language = "English",
volume = "17",
pages = "3885--3894",
journal = "Hydrology and Earth System Sciences",
issn = "1027-5606",
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}

A global analysis of the impact of drought on net primary productivity. / Chen, T.; van der Werf, G.R.; de Jeu, R.A.M.; Wang, G.; Dolman, A.J.

In: Hydrology and Earth System Sciences, Vol. 17, 2013, p. 3885-3894.

Research output: Contribution to JournalArticleAcademicpeer-review

TY - JOUR

T1 - A global analysis of the impact of drought on net primary productivity

AU - Chen, T.

AU - van der Werf, G.R.

AU - de Jeu, R.A.M.

AU - Wang, G.

AU - Dolman, A.J.

PY - 2013

Y1 - 2013

N2 - We investigated the impact of drought on interannual variability of net primary productivity (NPP) from 1997 to 2009, using the standardized precipitation evapotranspiration index (SPEI) drought index and satellite-derived vegetation greenness converted to NPP. SPEI is positive for wet conditions and negative for dry conditions. We found that SPEI and NPP were coupled and showed in-phase behaviour on a global scale. We then used the Köppen climate classification to study the SPEI-NPP relations regionally and found that while NPP and SPEI were positively related (high SPEI, high NPP) in arid and in seasonal dry regions, the opposite occurs in most boreal regions (high SPEI, low NPP). High intensity drought events, such as the 2003 drought in Europe were picked up by our analysis. Our findings suggest that the strong positive relation between global average moisture availability and NPP consists of a composite of the positive relation across dry regions and the coherent NPP decline during and after intensive drought events in humid regions. Importantly, we also found that there are many areas on the globe that show no strong correlation between drought and NPP. © Author(s) 2013. CC Attribution 3.0 License.

AB - We investigated the impact of drought on interannual variability of net primary productivity (NPP) from 1997 to 2009, using the standardized precipitation evapotranspiration index (SPEI) drought index and satellite-derived vegetation greenness converted to NPP. SPEI is positive for wet conditions and negative for dry conditions. We found that SPEI and NPP were coupled and showed in-phase behaviour on a global scale. We then used the Köppen climate classification to study the SPEI-NPP relations regionally and found that while NPP and SPEI were positively related (high SPEI, high NPP) in arid and in seasonal dry regions, the opposite occurs in most boreal regions (high SPEI, low NPP). High intensity drought events, such as the 2003 drought in Europe were picked up by our analysis. Our findings suggest that the strong positive relation between global average moisture availability and NPP consists of a composite of the positive relation across dry regions and the coherent NPP decline during and after intensive drought events in humid regions. Importantly, we also found that there are many areas on the globe that show no strong correlation between drought and NPP. © Author(s) 2013. CC Attribution 3.0 License.

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