Fig. 6 Net primary productivity after nuclear war.

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Fig. 6 Net primary productivity after nuclear war. Net primary productivity after nuclear war. Globally integrated monthly averaged NPP as a percentage of the baseline (control run) values as a function of time: over the oceans (A) and landmasses (B). Results are shown for each of the war scenarios described in the text. Color coding designates the corresponding BC injection amounts. As in Fig. 5, the full nuclear winter injection case (150 Tg, green line) is shown for contrast. (C) Global distribution of annual average NPP for the baseline control run. (D) Change from the baseline averaged over the second calendar year following a nuclear conflict, which starts in May of year 1 for the scenario with 50-kt weapons and a 27-Tg injection of BC. Owen B. Toon et al. Sci Adv 2019;5:eaay5478 Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).