6/4/2023 0 Comments Browning timetool![]() ![]() ![]() These difficulties mean that convincing detection and attribution of climate change impacts on ecosystems is limited to a small number of well-studied systems 7. For example, biomass increases that are expected as a consequence of enhanced carbon assimilation by elevated atmospheric CO 2 concentrations may be constrained by water and nutrient availability 8, 9, 10, 11. Attribution is difficult because ecosystem dynamics can be nonlinear and asynchronous and the dynamics are co-limited by environmental drivers that are often highly correlated with one another. Detection is difficult because signals in the data can be diluted by the stochasticity inherent in the system, the short length of available time series, errors in the observation process and the often overriding effect of land-use change. Detecting this change and attributing it to climate change is a major research challenge in Earth systems science 7. Our study reveals a clear fingerprint of climate change in the change exhibited by terrestrial ecosystems over recent decades.Ĭlimate change is impacting the structure and functioning of terrestrial ecosystems 1, 2, 3, 4, 5, 6. Observed trend switching is widespread and dominated by shifts from greening to browning, suggesting many of the ecosystems studied are accumulating less carbon. We find that the effects of CO 2 fertilization on vegetation are limited, potentially due to masking by other environmental drivers. Ecosystems in dry and warm locations responded primarily to changes in soil moisture, whereas ecosystems in cooler locations responded primarily to changes in temperature. We detect a change in vegetation activity for all ecosystem types and find these changes can be attributed to trends in climate-system parameters. Here we analyse the vegetation dynamics of 100 sites representative of the diversity of terrestrial ecosystem types using remote-sensing data spanning the past 40 years and a dynamic model of plant growth, forced by climate reanalysis data. However, detecting changes in ecosystem dynamics and attributing such change to anthropogenic climate change has proved difficult. ![]() Climate change is expected to impact the functioning of the entire Earth system. ![]()
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