Results 231 to 240 of about 14,065 (269)

Photochemical reflectance index (PRI) can be used to improve the relationship between gross primary productivity (GPP) and sun-induced chlorophyll fluorescence (SIF)

, 2020
Despite much progress has been made in recent years, the estimation of terrestrial gross primary productivity (GPP) remains highly uncertain. Recent studies have demonstrated the usefulness of sun-induced chlorophyll fluorescence (SIF) from plants for ...
Xiaoping Wang, Jing M. Chen, W. Ju
semanticscholar   +1 more source

Increasing Gross Primary Production (GPP) in the Urbanizing Landscapes of Southeastern Michigan

Photogrammetric Engineering & Remote Sensing, 2007
In order to understand the impact of urbanizing landscapes on regional gross primary production (GPP), we analyzed changes in land-cover and annual GPP over an urban-rural gradient in ten Southeastern Michigan counties between 1991 and 1999. Landsat and AVHRR remote sensing data and biophysical parameters corresponding to three major landcover types (i.
Tingting Zhao, Daniel G. Brown, Kathleen M. Bergen   +2 more
openaire   +1 more source

Evaluating gross primary productivity over 9 ChinaFlux sites based on random forest regression models, remote sensing, and eddy covariance data.

Science of the Total Environment, 2023
Accurate modeling of Gross Primary Productivity (GPP) in terrestrial ecosystems is a major challenge in quantifying the carbon cycle. Many light use efficiency (LUE) models have been developed, but the variables and algorithms used for environmental ...
X. Chang, Y. Xing, Weishu Gong, Cheng Yang, Zhen Guo, Dejun Wang, Jiaqi Wang, Han Yang, Gang Xue, Shuhang Yang   +9 more
semanticscholar   +1 more source

Soil moisture dominates the variation of gross primary productivity during hot drought in drylands.

Science of the Total Environment, 2023
The frequency and severity of hot drought will increase in the future due to impact of climate change and human activities, threatening the sustainability of terrestrial ecosystems and human societies. Hot drought is a typical type of drought event, high
Ruonan Qiu, Ge Han, Siwei Li, Fengli Tian, Xin Ma, W. Gong   +5 more
semanticscholar   +1 more source

Global prediction of gross primary productivity under future climate change.

Science of the Total Environment, 2023
The ecosystem gross primary productivity (GPP) is crucial to land-atmosphere carbon exchanges, and changes in global GPP as well as its influencing factors have been well studied in recent years.
Qikai Lu, Hui Liu, Lifei Wei, Yanfei Zhong, Zheng Zhou   +4 more
semanticscholar   +1 more source

Modeling China's terrestrial ecosystem gross primary productivity with BEPS model: Parameter sensitivity analysis and model calibration

Agricultural and Forest Meteorology, 2023
Terrestrial ecosystems are the largest sink for carbon, and their ecosystem gross primary productivity (GPP) regulates variations in atmospheric carbon dioxide (CO 2 ) concentrations.
Xiuli Xing, Mousong Wu, Wenxin Zhang, W. Ju, T. Tagesson, Wei He, Songhan Wang, Jun Wang, Lu Hu, Shu Yuan, Tingting Zhu, Xiaorong Wang, Youhua Ran, Sien Li, Chunyu Wang, Fei Jiang   +15 more
semanticscholar   +1 more source

[Simulated Ozone Damage on Gross Primary Productivity (GPP) in a Winter Wheat Field].

Huan jing ke xue= Huanjing kexue, 2020
An eddy-covariance system combined with a semi-mechanistic model was used to analyze variations in gross primary productivity (GPP) and to simulate the impact of ozone (O3) on GPP under different levels O3 concentrations over a winter wheat field in Nanjing.
Jing-Xin, Xu, You-Fei, Zheng, Sheng, Wang, Li-Wen, Wang, Xiu-Yong, Zhao, Bo-Ru, Mai   +5 more
openaire   +1 more source

Revisiting the cumulative effects of drought on global gross primary productivity based on new long‐term series data (1982–2018)

Global Change Biology, 2022
Drought has broad and deep impacts on vegetation. Studies on the effects of drought on vegetation have been conducted over years. Recently, the cumulative effect of drought is recognized as another key factor affecting plant growth. However, global‐scale
Zhenyu Zhang, W. Ju, Yanlian Zhou, Xiaoyu Li   +3 more
semanticscholar   +1 more source

The Reproducibility of Gross Primary Production Estimation From GPP Capacity and Canopy Conductance Index in Dry Area

IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019
The characteristics of this GPP estimation method correspond to the photosynthesis process. The photosynthesis velocity depends on itś capacity and depression because of weather conditions. The depression part is controlled by the stom-atal opening and closing and the canopy conductance was calculated using Big-leaf model.
openaire   +1 more source

TAVIs: Topographically Adjusted Vegetation Index for a Reliable Proxy of Gross Primary Productivity in Mountain Ecosystems

IEEE Transactions on Geoscience and Remote Sensing
Remotely sensed (RS) vegetation indices (VIs) are increasingly being employed as a direct proxy for gross primary productivity (GPP). When estimating mountain vegetation GPP from VI, efforts often focus on the RS-related topographic effect (i.e., distort
Xinyao Xie, Wei Zhao, Gaofei Yin
semanticscholar   +1 more source