East Asian CO2 level change caused by Pacific Decadal Oscillation

Accurate projection of CO2 concentration in time and space remains challenging because complex interplay between anthropogenic emissions, biospheric responses, climatic variabilities. While the increase atmospheric is due primarily to fossil fuel burning, natural climate variabilities are known introduce intermittent changes global growth rates. Thus, understanding correlation carbon cycling systems important assessing impacts. Here, we report decadal western Pacific based on data from several ground-based stations region Atmospheric Infrared Sounder (AIRS). In addition well-established El Niño–Southern Oscillation (ENSO), there exists a changing trend datasets mentioned above. Analysis measurements northern Taiwan shows signal at amplitudes ~5 ppm. contrast, AIRS similar but reduced amplitude ~1 We attribute dynamical factors related Decadal (PDO). This signal, however, not reproduced by state-of-the-art assimilation system, CarbonTacker, suggesting gap our knowledge modulation climate.