Land management and land-cover change have impacts of similar magnitude on surface temperature
Land management and land-cover change have impacts of similar magnitude on surface temperature
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DOI：
10.1038/nclimate2196
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发表时间：
2014-05-01
影响因子：
30.7
通讯作者：
Dolman, A. Johannes
中科院分区：
文献类型：
--
作者：
Luyssaert, Sebastiaan;Jammet, Mathilde;Dolman, A. Johannes
人为的土地覆盖变化（LCC）仍然很常见，但持续的土地稀缺促进了土地管理变化（LMC）的广泛强化，以更好地满足社会对食物、纤维、燃料和住所的需求(1)。LMC对地表气候的生物物理影响在很大程度上被理解（2-5），特别是对北方地区(6)和热带地区(7)，但很少有研究调查了LMC的生物物理后果；也就是说，不改变土地覆盖类型的人为改造。对LCC和LMC的地面测量和遥感观测的统一分析表明，在温带，反照率增加造成的潜在地表降温通常被感热通量减少造成的增温所抵消，其净效应是地表升温。LMC和LCC的温度变化幅度相同，在植被表面平均为2 K，在行星边界层估计为1.7 K。考虑到土地管理的空间范围（42-58%的陆地表面），这就要求加大努力，将土地管理纳入地球系统科学，以便更好地考虑人类对气候的影响(8)。
Anthropogenic changes to land cover (LCC) remain common, but continuing land scarcity promotes the widespread intensification of land management changes (LMC) to better satisfy societal demand for food, fibre, fuel and shelter(1). The biophysical effects of LCC on surface climate are largely understood(2-5), particularly for the boreal(6) and tropical zones(7), but fewer studies have investigated the biophysical consequences of LMC; that is, anthropogenic modification without a change in land cover type. Harmonized analysis of ground measurements and remote sensing observations of both LCC and LMC revealed that, in the temperate zone, potential surface cooling from increased albedo is typically offset by warming from decreased sensible heat fluxes, with the net effect being a warming of the surface. Temperature changes from LMC and LCC were of the same magnitude, and averaged 2 K at the vegetation surface and were estimated at 1.7 K in the planetary boundary layer. Given the spatial extent of land management (42-58% of the land surface) this calls for increasing the efforts to integrate land management in Earth System Science to better take into account the human impact on the climate(8).