Simulated CO2 concentrations at Barrow station for 1979-2020 by ORCHIDEE-LMDz6A model ...

• Main Author: Zhu, Dan
• Format: Text
• Language: unknown
• Published: figshare 2023
• Subjects: Greenhouse gas inventories and fluxes; Ecological impacts of climate change and ecological adaptation; Barrow; Alaska
• Online Access: https://dx.doi.org/10.6084/m9.figshare.24501334; https://figshare.com/articles/journal_contribution/Simulated_CO2_concentrations_at_Barrow_station_for_1979-2020_by_ORCHIDEE-LMDz6A_model/24501334

Supplement to Zhu et al., 2023, Temperature dependence of spring carbon uptake in northern high latitudes during the past four decades, in final submission to Global Change Biology.Abstract: In the northern high-latitudes, warmer spring temperatures generally lead to earlier leaf onsets, higher vegetation production and enhanced spring carbon uptake. Yet, whether this positive linkage has diminished under climate change remains debated. Here we used atmospheric CO 2 measurements at Barrow (Alaska) during 1979-2020 to investigate the strength of temperature dependence of spring carbon uptake reflected by two indicators, spring zero-crossing date (SZC) and CO 2 drawdown (SCC). We found a fall-and-rise in the interannual correlation of temperature with SZC and SCC (R SZC-T and R SCC-T ), showing a recent reversal of the previously reported weakening trend of R SZC-T and R SCC-T . We used a terrestrial biosphere model coupled with an atmospheric transport model to reproduce this fall-and-rise phenomenon, and ...