Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.1111/gcb.70782 |
Licence  |
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| Title (Primary) | Non-abrupt vegetation changes due to altered nutrient balance make complex scale-dependent warming and cooling effects |
| Author | Hanggara, B.; El-Madany, T.; Carrara, A.; Moreno, G.; Gonzalez-Cascon, R.; Burchard-Levine, V.; Martin, M.P.; Metzger, S.; Hildebrandt, A.; Reichstein, M.; Lee, S.-C. |
| Source Titel | Global Change Biology |
| Year | 2026 |
| Department | CHS |
| Volume | 32 |
| Issue | 3 |
| Page From | e70782 |
| Language | englisch |
| Topic | T5 Future Landscapes |
| Data and Software links | https://doi.org/10.5065/D6F47MT6 https://doi.org/10.5281/zenodo.15799672 https://doi.org/10.5281/zenodo.3594673 https://doi.org/10.6073/pasta/d77b84b11be99ed4d5376d77fe0043d8 |
| Supplements | Supplement 1 |
| Abstract |
Land-atmosphere
exchanges are mediated by biophysical properties (e.g., albedo change,
evaporative cooling) and biogeochemical cycle (e.g., CO2 fluxes), with both
processes exerting global feedback as radiative forcing (RF). While most
research on RF concentrated on the impact of abrupt vegetation changes, this
study investigates the effects on non-abrupt changes due to altered nutrient
levels (i.e., nitrogen [N] and phosphorus [P] deposition). We examined impacts
of these changes by assessing RF, representing global effects, and linked it
with surface temperature (Ts), reflecting local influence. We hypothesized
there are scale-dependent warming and cooling effects due to surface-atmosphere
interactions. We explored this question using a 9-year dataset (2014–2023) from
a large-scale nutrient manipulation experiment in a semi-arid savanna, Spain.
Three co-located eddy-covariance sites are established: control, N-added (NT),
and N + P-added (NPT). The results indicate domination of changes in surface
albedo over CO2 fluxes, producing paradoxical effects: a net cooling at global
scale (RF differences are [mean ± SD]—0.46 ± 0.08 W m−2 [global] m−2 [surface]
at NT and −0.39 ± 0.09 W m−2 m−2 at NPT) due to higher
surface reflectivity, but localized warming at understory ( differences are
0.63°C ± 0.46°C at and 0.80°C ± 0.77°C at ) driven by shifts in energy
partitioning. Furthermore, our findings indicate that N-only addition has more
canopy-level Ts cooling than N + P treatment, although Ts increases at the
understory. These contrasting responses reveal a layered and scale-dependent
interplay of surface-atmosphere interactions. They highlight the critical role
of nutrient stoichiometry in shaping climate feedbacks despite the vegetation
changes are not abrupt, and emphasize that what cools the globe may still warm
the land beneath our feet. |
| Hanggara, B., El-Madany, T., Carrara, A., Moreno, G., Gonzalez-Cascon, R., Burchard-Levine, V., Martin, M.P., Metzger, S., Hildebrandt, A., Reichstein, M., Lee, S.-C. (2026): Non-abrupt vegetation changes due to altered nutrient balance make complex scale-dependent warming and cooling effects Glob. Change Biol. 32 (3), e70782 10.1111/gcb.70782 |
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