Biophysical effects of croplands on land surface temperature

被引:0
|
作者
Chen, Chi [1 ]
Li, Yang [2 ]
Wang, Xuhui [3 ]
Luo, Xiangzhong [2 ]
Li, Yue [4 ]
Cheng, Yu [5 ]
Zhu, Zhe [6 ]
机构
[1] Rutgers State Univ, Dept Ecol Evolut & Nat Resource, New Brunswick, NJ 08854 USA
[2] Natl Univ Singapore, Dept Geog, Singapore, Singapore
[3] Peking Univ, Sino French Inst Earth Syst Sci, Coll Urban & Environm Sci, Beijing, Peoples R China
[4] Univ Calif Los Angeles, Dept Geog, Los Angeles, CA USA
[5] Harvard Univ, Dept Earth & Planetary Sci, Cambridge, MA USA
[6] Univ Connecticut, Dept Nat Resources & Environm, Storrs, CT USA
关键词
BACKGROUND CLIMATE; COVER CHANGE; VEGETATION; IMPACTS; HEAT; ATTRIBUTION; MANAGEMENT;
D O I
10.1038/s41467-024-55319-2
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Converting natural vegetation to croplands alters the local land surface energy budget. Here, we use two decades of satellite data and a physics-based framework to analyse the biophysical mechanisms by which croplands influence daily mean land surface temperature (LST). Globally, 60% of croplands exhibit an annual warming effect, while 40% have a cooling effect compared to their surrounding natural ecosystems. Aerodynamic resistance is identified as the dominant biophysical factor impacting LST by adjusting latent heat flux. The magnitude of cropland-induced LST change is negatively correlated with the difference in leaf area index between croplands and their surrounding biome types. The strongest warming occurs in temperate dry regions where croplands are surrounded by savannas. However, a lower-than-expected LST disturbance is seen in hot and wet regions where croplands are surrounded by rainforests, attributed to lower cropland fraction and energy limitations. These findings highlight the complex interplay of land use, vegetation, and regional climate, providing valuable insights into sustainable agriculture and land-based climate change mitigation.
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页数:10
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