An earlier start of the thermal growing season enhances tree growth in cold humid areas but not in dry areas
Climatic warming alters the onset, duration and cessation of the vegetative season. While prior studies have shown a tight link between thermal conditions and leaf phenology, less is known about the impacts of phenological changes on tree growth. Here, we assessed the relationships between the start of the thermal growing season (TSOS) and tree growth across the extratropical Northern Hemisphere using 3451 tree-ring chronologies and daily climatic data for 1948-2014. An earlier TSOS promoted growth in regions with high ratios of precipitation to temperature but limited growth in cold dry regions. Path analyses indicated that an earlier TSOS enhanced growth primarily by alleviating thermal limitations on wood formation in boreal forests and by lengthening the period of growth in temperate and Mediterranean forests. Semi-arid and dry subalpine forests, however, did not benefit from an earlier onset of growth and a longer growing season, presumably due to associated water loss and/or more frequent early spring frosts. These broadly relevant patterns of how climatic impacts on wood phenology affect tree growth at regional to hemispheric scales, enhance our understanding of how future phenological changes may affect the carbon sequestration capacity of extra-tropical forest ecosystems.
Filenames of climatic variables (at site-level):
TSOS, GSL：cumdata_SOSEOSpeak_length_20200328.csv
SM：cumdata_SMRZ_20200328.csv
P：cumdata_precipitation_20200328.csv
GDD: cumdata_tas_5sum_20200328.csv
梁尔源, 高姗. (2021). An earlier start of the thermal growing season enhances tree growth in cold humid areas but not in dry areas. 时空三极环境大数据平台,
DOI:
10.11888/Terre.tpdc.271925.
CSTR:
18406.11.Terre.tpdc.271925.
[Liang, E., Gao, S. (2021). An earlier start of the thermal growing season enhances tree growth in cold humid areas but not in dry areas. A Big Earth Data Platform for Three Poles,
DOI:
10.11888/Terre.tpdc.271925.
CSTR:
18406.11.Terre.tpdc.271925.
]
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1. Gao, S., Liang, E. Y., Liu, R.S., Babst, F., Camarero, J. J., Fu, Y.S., Piao, S.L., Rossi, S., Shen, M.G., Wang, T., Peñuelas, J. (2022). An earlier start of the thermal growing season enhances tree growth in cold humid areas but not in dry areas, Nature Ecology & Evolution, 6(4): 397–404.( 查看 | Bibtex格式)
2. Gao, S., Zhou, T., Yi, C., Shi, P., Fang, W., Liu, R., Liang, E., & Julio Camarero, J. (2020). Asymmetric impacts of dryness and wetness on tree growth and forest coverage. Agricultural and Forest Meteorology, 288-289, 107980. doi:10.1016/j.agrformet.2020.107980( 查看 | Bibtex格式)
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1.Zhao, S.， Pederson, N., D'Orangeville, L., HilleRisLambers, J., Boose, E., Penone, C., Bauer, B., Jiang, Y., Manzanedo, R.D. (2019). The International Tree-Ring Data Bank (ITRDB) revisited: Data availability and global ecological representativity. J. Biogeogr. 46, 355–368. (查看 )
2.Sheffield, J. , Goteti, G., Wood, E. F. (2006). Development of a 50-Year High-Resolution Global Dataset of Meteorological Forcings for Land Surface Modeling. J. Clim. 19, 3088-3111. (查看 )
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