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

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...

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Vydané v:Remote sensing (Basel, Switzerland) Ročník 14; číslo 18; s. 4658
Hlavní autori: Wu, Xiaoping, Zhang, Rongrong, Bento, Virgílio A., Leng, Song, Qi, Junyu, Zeng, Jingyu, Wang, Qianfeng
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Basel MDPI AG 01.09.2022
Predmet:
Accuracy
Agricultural land
Autumn
Carbon
Carbon cycle
China
climate
Climate change
Correlation
Deciduous forests
Drought
Drought index
Ecology
Ecosystems
Environmental economics
Environmental impact
Evapotranspiration
Forests
GPP
Grasslands
gross primary productivity
Humidity
Precipitation
Productivity
SPEI
Summer
Topography
Vapor pressure
vapor pressure deficit
Vegetation
VPD
Water deficit
China
ISSN:2072-4292, 2072-4292
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Shrnutí: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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ISSN:2072-4292
2072-4292
DOI:10.3390/rs14184658