The Effect of Drought on Vegetation Gross Primary Productivity under Different Vegetation Types across China from 2001 to 2020

Wu, X; Zhang, R; Bento, VA; Leng, S; Qi, J; Zeng, J; Wang, Q

The Effect of Drought on Vegetation Gross Primary Productivity under Different Vegetation Types across China from 2001 to 2020

Wu, X Zhang, R Bento, VA Leng, S Qi, J Zeng, J Wang, Q

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Publisher:: MDPI AG
Publication Type:: Journal Article
Citation:: Remote Sensing, 2022, 14, (18), pp. 1-21
Issue Date:: 2022-09-01

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Field	Value	Language
dc.contributor.author	Wu, X
dc.contributor.author	Zhang, R
dc.contributor.author	Bento, VA
dc.contributor.author	Leng, S
dc.contributor.author	Qi, J
dc.contributor.author	Zeng, J
dc.contributor.author	Wang, Q
dc.date.accessioned	2023-07-10T08:55:57Z
dc.date.available	2023-07-10T08:55:57Z
dc.date.issued	2022-09-01
dc.identifier.citation	Remote Sensing, 2022, 14, (18), pp. 1-21
dc.identifier.issn	2072-4292
dc.identifier.issn	2072-4292
dc.identifier.uri	http://hdl.handle.net/10453/171411
dc.description.abstract	Highlights: Two drought indices (SPEI and VPD) were used to characterize the degree of dryness/wetness. The water deficit represented by two drought indices was mostly negatively correlated with vegetation GPP, especially in summer and autumn. The negative impact of water deficit/drought as measured by SPEI on vegetation GPP was more severe than that revealed by VPD. During drought, both SPEI and VPD showed that drought had a negative impact on vegetation GPP in North China, Southwest China, and the Qinghai–Tibet Plateau. Climate change has exacerbated the frequency and severity of droughts worldwide. Evaluating the response of gross primary productivity (GPP) to drought is thus beneficial to improving our understanding of the impact of drought on the carbon cycle balance. Although many studies have investigated the relationship between vegetation productivity and dry/wet conditions, the capability of different drought indices of assessing the influence of water deficit is not well understood. Moreover, few studies consider the effects of drought on vegetation with a focus on periods of drought. Here, we investigated the spatial-temporal patterns of GPP, the standardized precipitation evapotranspiration index (SPEI), and the vapor pressure deficit (VPD) in China from 2001 to 2020 and examined the relationship between GPP and water deficit/drought for different vegetation types. The results revealed that SPEI and GPP were positively correlated over approximately 70.7% of the total area, and VPD was negatively correlated with GPP over about 66.2% of the domain. Furthermore, vegetation productivity was more negatively affected by water deficit in summer and autumn. During periods of drought, the greatest negative impact was on deciduous forests and croplands, and woody savannas were the least impacted. This research provides a scientific reference for developing mitigation and adaptation measures to lessen the impact of drought disasters under a changing climate.
dc.language	en
dc.publisher	MDPI AG
dc.relation.ispartof	Remote Sensing
dc.relation.isbasedon	10.3390/rs14184658
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0203 Classical Physics, 0406 Physical Geography and Environmental Geoscience, 0909 Geomatic Engineering
dc.subject.classification	3701 Atmospheric sciences
dc.subject.classification	3709 Physical geography and environmental geoscience
dc.subject.classification	4013 Geomatic engineering
dc.title	The Effect of Drought on Vegetation Gross Primary Productivity under Different Vegetation Types across China from 2001 to 2020
dc.type	Journal Article
utslib.citation.volume	14
utslib.for	0203 Classical Physics
utslib.for	0406 Physical Geography and Environmental Geoscience
utslib.for	0909 Geomatic Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Life Sciences
utslib.copyright.status	open_access	*
pubs.consider-herdc	false
dc.date.updated	2023-07-10T08:55:51Z
pubs.issue	18
pubs.publication-status	Published
pubs.volume	14
utslib.citation.issue	18

Abstract:

Highlights: Two drought indices (SPEI and VPD) were used to characterize the degree of dryness/wetness. The water deficit represented by two drought indices was mostly negatively correlated with vegetation GPP, especially in summer and autumn. The negative impact of water deficit/drought as measured by SPEI on vegetation GPP was more severe than that revealed by VPD. During drought, both SPEI and VPD showed that drought had a negative impact on vegetation GPP in North China, Southwest China, and the Qinghai–Tibet Plateau. Climate change has exacerbated the frequency and severity of droughts worldwide. Evaluating the response of gross primary productivity (GPP) to drought is thus beneficial to improving our understanding of the impact of drought on the carbon cycle balance. Although many studies have investigated the relationship between vegetation productivity and dry/wet conditions, the capability of different drought indices of assessing the influence of water deficit is not well understood. Moreover, few studies consider the effects of drought on vegetation with a focus on periods of drought. Here, we investigated the spatial-temporal patterns of GPP, the standardized precipitation evapotranspiration index (SPEI), and the vapor pressure deficit (VPD) in China from 2001 to 2020 and examined the relationship between GPP and water deficit/drought for different vegetation types. The results revealed that SPEI and GPP were positively correlated over approximately 70.7% of the total area, and VPD was negatively correlated with GPP over about 66.2% of the domain. Furthermore, vegetation productivity was more negatively affected by water deficit in summer and autumn. During periods of drought, the greatest negative impact was on deciduous forests and croplands, and woody savannas were the least impacted. This research provides a scientific reference for developing mitigation and adaptation measures to lessen the impact of drought disasters under a changing climate.

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