Abstract
Greening plays a key role in surface-atmosphere energy exchanges, exerting feedback on the climate. While several studies have examined greening feedback in forested regions, the effect on temperature feedbacks in global drylands remain poorly understood. In this study, we used a combination of satellite and reanalysis data to examine the global dryland greening trends over the past two decades and assessed the changes in the biophysical properties. Results show that the greening-induced changes in surface albedo affected net shortwave radiation; however, evapotranspiration linked to changes in soil moisture dominated the temperature feedback, accounting for approximately 54–83% of the feedback signal. This dominance was most pronounced for daytime surface temperature, where the evapotranspiration effect was up 66% more than that of surface albedo. Significant greening was associated with a decrease in daytime surface temperature of 0.53 and 0.8 °C/decade, while significant browning was associated with an increase of 0.86 and 1.32 °C/ decade. Although greening was significant over the global drylands, soil moisture availability strongly controlled evapotranspiration and its contribution to temperature feedback. As dryland continues to warm, moisture availability is important for plant functioning, which impacts the regional climate through surface and atmosphere feedback and, therefore, the sustainability of drylands.
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Data availability
The MODIS data product is available at https://lpdaac.usgs.gov/. ERA5 reanalysis data are available at https://doi.org/10.24381/cds.f17050d7. The GLEAM data products are available at https://www.gleam.eu/#datasets. CRU TS data is available through Harris, et al.33.
Abbreviations
- AI:
-
Aridity index
- BareE:
-
Baresoil evaporation
- CGIAR:
-
Consultative group for international agriculture research
- CMG:
-
Climate modeling grid
- Ea:
-
Actual vapor pressure
- Es:
-
Saturated vapor pressure
- ENSO:
-
El Niño–Southern oscillation
- ESACCI:
-
European space agency’s climate change initiative
- ET:
-
Evapotranspiration
- GLEAM:
-
Global land evaporation amsterdam model
- H:
-
Sensible heat flux
- IGBP:
-
International geosphere-biosphere programme
- LE:
-
Latent heat flux
- LSA:
-
Land surface albedo
- LST:
-
Land surface temperature
- MODIS:
-
Moderate resolution imaging spectroradiometer
- NAO:
-
North atlantic oscillation
- NDVI:
-
Normalized difference vegetation index
- P:
-
Precipitation
- PET:
-
Potential evapotranspiration
- SM:
-
Soil moisture
- VegT:
-
Vegetation transpiration
- VPD:
-
Vapor pressure deficit
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Acknowledgements
We are grateful for the support from the National Key R&D Program of China (2023YFF0805900-03, 2018YFA0606500). The first author was a recipient of a research studentship provided by the University of Chinese Academy of Sciences (UCAS) Scholarship.
Funding
This research was supported by the Guangdong‐Hong Kong Joint Laboratory for Carbon Neutrality (No.2023B1212120003), the Guangdong Talent Program (No.2023JC10N060), the Guangdong Science and Technology Program (No.2022B1212040001), and the Special Fund for Science and Technology Innovation Strategy of Guangdong Province (Grant No. 2022660500250009604). Mojolaoluwa T. Daramola is currently supported by Research Ireland (RI 22/CC/11103).
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**M.T.D.** : conceptualization, methodology, formal analysis, writing **M.X.** : conceptualization, methodology, supervision, funding acquisition **R.L.** : supervision, resources, project administration.
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Daramola, M.T., Li, R. & Xu, M. Evaporative cooling exceeded albedo-induced warming in greening areas of global drylands. Sci Rep (2026). https://doi.org/10.1038/s41598-026-36781-y
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DOI: https://doi.org/10.1038/s41598-026-36781-y


