نتایج جستجو برای: growing season precipitation

تعداد نتایج: 303964  

2012
Haiying Yu Jianchu Xu Erick Okuto Eike Luedeling

BACKGROUND Monitoring vegetation dynamics and their responses to climate change has been the subject of considerable research. This paper aims to detect change trends in grassland activity on the Tibetan Plateau between 1982 and 2006 and relate these to changes in climate. METHODOLOGY/PRINCIPAL FINDINGS Grassland activity was analyzed by evaluating remotely sensed Normalized Difference Vegeta...

2018
Dafeng Hui Chih-Li Yu Qi Deng E Kudjo Dzantor Suping Zhou Sam Dennis Roger Sauve Terrance L Johnson Philip A Fay Weijun Shen Yiqi Luo

Climate changes, including chronic changes in precipitation amounts, will influence plant physiology and growth. However, such precipitation effects on switchgrass, a major bioenergy crop, have not been well investigated. We conducted a two-year precipitation simulation experiment using large pots (95 L) in an environmentally controlled greenhouse in Nashville, TN. Five precipitation treatments...

2014
Liming Yan Shiping Chen Jianyang Xia Yiqi Luo

The effect of resource pulses, such as rainfall events, on soil respiration plays an important role in controlling grassland carbon balance, but how shifts in long-term precipitation regime regulate rain pulse effect on soil respiration is still unclear. We first quantified the influence of rainfall event on soil respiration based on a two-year (2006 and 2009) continuously measured soil respira...

2017
Bo Wang Tuo Chen Guobao Xu Guoju Wu Ignacio García-González

Due to the lack of available long-term climatic records, data related to past autumn precipitation variability throughout Northwest China, especially high-frequency variation, remains limited. In this study, it was found that inter-annual changes in Qinghai spruce radial growth were significantly and negatively (p < 0.05) correlated to inter-annual differences in precipitation during the late g...

Journal: :Remote Sensing 2015
Yanlan Liu Huimin Lei

This study investigated the spatiotemporal variation of vegetation growth and the influence of climatic drivers from 1982 to 2011 across China using datasets from the Normalized Difference Vegetation Index (NDVI) and climatic drivers. Long term trends, significance and abrupt change points of interannual NDVI time series were analyzed. We applied both simple regression and multi-regression mode...

2018
Lalasia Bialic-Murphy Orou G Gaoue

Climate projections forecast more extreme interannual climate variability over time, with an increase in the severity and duration of extreme drought and rainfall events. Based on bioclimatic envelope models, it is projected that changing precipitation patterns will drastically alter the spatial distributions and density of plants and be a primary driver of biodiversity loss. However, many othe...

Journal: :Remote Sensing 2014
Zhenxi Shen Gang Fu Chengqun Yu Wei Sun Xianzhou Zhang

Temperature and water conditions affect vegetation growth dynamics and associated spectral measures. We examined the response of the growing season maximum enhanced vegetation index (MEVI) to the growing season temperature, precipitation, vapor pressure and relative humidity on the Tibetan Plateau. The responses of the MEVI to climatic factors changed with the vegetation type, which may be attr...

The present study aims to investigate the structure and trend of climate parameters affecting grape growth in Khorasan Razavi (north eastern Iran) in the period of 1991-2015 in 8 weather stations. Effective climate elements such as temperature, precipitation, the number of hot days, the number of frost days, sunshine hours and parameters such as maximum temperature, annualaverageannual average ...

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