Remotely Sensed Carbonyl Sulfide Constrains Model Estimates of Amazon Primary Productivity
J. Stinecipher, Philip Cameron‐Smith, Le Kuai, N. Glatthor, M. Höpfner, Ian Baker, Christian Beer, K. W. Bowman, Meemong Lee, Scot M. Miller, Nicholas C. Parazoo, J. Elliott Campbell
Abstract
Abstract Understanding the magnitude of tropical gross primary production (GPP) is critical for carbon cycle modeling and climate projections, but this quantity is poorly constrained at regional scales. Biospheric uptake of carbonyl sulfide (OCS) provides a promising approach to estimating regional GPP. Here, we simulate OCS concentrations driven by surface flux scenarios encompassing a wide range of GPP estimates for the Amazon basin. We compare the model output to satellite retrievals and find a regional GPP estimate of 2375 ± 914 g(C) m −2 yr −1 , consistent with previous estimates, including the TRENDY model ensemble range of 1431–3812 g(C) m −2 yr −1 .