Primary Production, an Index of Climate Change in the Ocean: Satellite-Based Estimates over Two Decades

作者：Gemma Kulk, Trevor Platt, James Dingle, T. J. Jackson, Bror Fredrik Jönsson, Heather A. Bouman, Marcel Babin, Robert J. W. Brewin, Martina A. Doblin, Marta Estrada, F. G. Figueiras, Ken Furuya, Natalia González, Hafsteinn G. Guðfinnsson, Kristinn Guðmundsson, Bangqin Huang, Tomonori Isada, Žarko Kovač, Vivian A. Lutz, Emilio Marañón, Mini Raman, Katherine Anne Koren Richardson, Patrick D. Rozema, Willem H. van de Poll, Valeria Segura, Gavin H. Tilstone, Julia Uitz, Virginie van Dongen‐Vogels, Takashi Yoshikawa, Shubha Sathyendranath · 发表于：Remote Sensing · 年份：2020 · DOI：10.3390/rs12050826 · 被引用次数：189 · 研究领域：Marine and coastal ecosystems、Marine Biology and Ecology Research、Marine and fisheries research

Primary production by marine phytoplankton is one of the largest fluxes of carbon on our planet. In the past few decades, considerable progress has been made in estimating global primary production at high spatial and temporal scales by combining in situ measurements of primary production with remote-sensing observations of phytoplankton biomass. One of the major challenges in this approach lies in the assignment of the appropriate model parameters that define the photosynthetic response of phytoplankton to the light field. In the present study, a global database of in situ measurements of photosynthesis versus irradiance (P-I) parameters and a 20-year record of climate quality satellite observations were used to assess global primary production and its variability with seasons and locations as well as between years. In addition, the sensitivity of the computed primary production to potential changes in the photosynthetic response of phytoplankton cells under changing environmental conditions was investigated. Global annual primary production varied from 38.8 to 42.1 Gt C yr − 1 over the period of 1998–2018. Inter-annual changes in global primary production did not follow a linear trend, and regional differences in the magnitude and direction of change in primary production were observed. Trends in primary production followed directly from changes in chlorophyll-a and were related to changes in the physico-chemical conditions of the water column due to inter-annual and multid...