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Biogeosciences
Tue-25 Jun | 8:30 - 12:30 | Level 2, Meadow & Lake Hall, Alpensia Convention Center
BG - Biogeosciences Poster Session
BG04-A003
Sensitivity of Land Surface Temperature to Lengthened Vegetation Growing Season in Boreal Forest
Chang-Eui PARK1#+, Sujong JEONG2
1Korea Institute of Science and Technology, Korea, South, 2Seoul National University, Korea, South
Vegetation phenology are important for shaping seasonal climate over the northern boreal forests. However, the biophysical effects of phenological changes on the land surface temperature (LST) are still unclear. Here, we estimated LST sensitivity to advanced start of growing season (SOS) and delayed end of growing season (EOS) during corresponding green-up and senescence periods over boreal deciduous forests based on experimental set of Community Land Model version 5. Estimated LST sensitivities to advanced SOS and delayed EOS during green-up and senescence periods were −2.1 × 10−2 K day−1 and −2.8 × 10−2 K day−1, respectively, denoting cooling land surface due to phenological changes. Reduced the aerodynamic resistance to SOS and EOS changes and relevant turbulent heat release could explain the higher LST sensitivity to EOS than that to SOS. Hence, the reduced aerodynamic resistance due to phenological shifts could be an important consideration for projecting seasonal climate change.