Seasonal vegetation response to climate change in the Northern Hemisphere (1982–2013)

Abstract

This study investigated vegetation response to climate change exhibited by temperature, soil moisture, and solar radiation at Northern Hemisphere (NH) scale during the growing season and seasonal periods by analyzing satellite observations of vegetation activity and climatic data for a period of 1982-2013. Generally, About 75.8% of NH was dominated by increasing NDVI3g during growing season in 1982-2013, and 50.7% significantly increase. Autumn NDVI3g is the main cause, with 77.7% increase (45.0% significantly increase). The increasing tendency of greenness was stalled and even shifted to vegetation browning after 1994-1997 specifically in Central Europe, Northern North America, and Central Siberia. NDVI3g increase during the growing season shifts from 0.017 year-1 to 0.006 year-1 , which mainly due to decreased spring NDVI3g and slowdown of summer NDVI3g increase. Specifically, three time intervals were identified with relatively peak

Spatial and Temporal Variation of NDVI in Response to Climate Change and the Implication for Carbon Dynamics in Nepal

“…The western parts of Nepal are located far from the ocean relative to the eastern parts, so that the rainfall was less but the vegetation distribution and presence of forest carbon were better than in eastern Nepal. Similar types of relationships, i.e., positive with respect to temperature and negative with respect to precipitation between NDVI and climate were reported in global and regional-scale research [16,22,84,92]. Besides the temperature and precipitation, the vegetation can also be influenced by other factors in Nepal which are related to CO 2 [44], topography and human disturbance [85], moisture limitation [93], nitrogen deposition, irrigation, change in croplands, land use practices and ecological restoration.…”

Lower land-use emissions responsible for increased net land carbon sink during the slow warming period

“…However, different mechanisms were proposed 1,2 . Here we analyse recent change in the net land carbon sink (NLS) and its driving factors using atmospheric inversions results 3,4 Coincident with the warming hiatus of 1998-2012 [9][10][11] , the vegetation greening trend observed from several satellite products stalled after 1998 in most regions [12][13][14][15][16] while the global land carbon sink has continued to increase 1,2 . Keenan et al 1 and Ballantyne et al 2 analysed this signal from the residual terrestrial carbon sink (RLS) calculated by difference between emissions from fossil fuel and land use, and ocean uptake and atmospheric CO2 growth rate.…”

Response of vegetation to different time-scales drought across China: Spatiotemporal patterns, causes and implications

“…Besides, other factors such as precipitation, temperature, and solar radiation, were not included in previous researches. However, temperature, solar radiation and water balance usually interact to impose complex impacts and varying constraints on vegetation activities in different parts of the globe (Nemani et al, 2003;Kong et al, 2017). Many researches indicated that NDVI have a good correlation with precipitation and temperature (Piao et al, 2003;Wang et al, 2003), albeit vegetation can also be influenced by other factors such as floods, pet/disease infestation, nutrient deficiency, wild fire, grazing and human activities and so on (Ji Peters, 2003).…”

“…Nevertheless, precipitation can directly determine the water availability in some regions that can constrain vegetation activities, temperature can influence plant photosynthesis and respiration, and accumulated temperature may have a stronger impact on vegetation activities (Shen et al, 2011) which refers to accumulation of daily temperature above 0℃ in this current study. Solar radiation is the energy of photosynthesis, which initiates photosynthesis when absorbed and converted to electronic excitation energy (Kong et al, 2017). Due to the limited observed solar radiation data, we used sunshine hours as a proxy in this current study.…”