Influence of anthropogenic aerosol deposition on the relationship between oceanic productivity and warming

• Published in: Geophysical Research Letters
• Main Authors: Wang, Rong, Balkanski, Yves, Bopp, Laurent, Aumont, Olivier, Boucher, Olivier, Ciais, Philippe, Gehlen, Marion, Penuelas, Josep, Ethe, Christian, Hauglustaine, Didier, Li, Bengang, Liu, Junfeng, Zhou, Feng, Tao, Shu
• Other Authors: Wang, R (reprint author), CEA CNRS UVSQ, Lab Sci Climat & Environm, Gif Sur Yvette, France., CEA CNRS UVSQ, Lab Sci Climat & Environm, Gif Sur Yvette, France., Peking Univ, Coll Urban & Environm Sci, Lab Earth Surface Proc, Beijing 100871, Peoples R China., Peking Univ, Coll Urban & Environm Sci, Sinofrench Inst Earth Syst Sci, Beijing 100871, Peoples R China., Univ Paris 06, Univ Paris 04, CNRS IRD MNHN, LOCEAN IPSL, Paris, France., Univ Paris 06, Meteorol Dynam Lab, IPSL CNRS, Paris, France., CREAF CEAB UAB, CSIC, Global Ecol Unit, Cerdanyola Del Valles, Catalonia, Spain., CREAF, Cerdanyola Del Valles, Catalonia, Spain., IPSL, Lab Oceanog & Climatol, Paris, France.
• Format: Journal/Newspaper
• Language: English
• Published: GEOPHYSICAL RESEARCH LETTERS 2015
• Subjects: ocean productivity; anthropogenic aerosols; nutrient limitation; ocean biogeochemical model; MARINE PRIMARY; CLIMATE-CHANGE; DESERT DUST; IRON; MODEL; CARBON; PHYTOPLANKTON; SOLUBILITY; TRENDS; DRIVEN; Indian; Pacific; North Atlantic
• Online Access: https://hdl.handle.net/20.500.11897/435515; https://doi.org/10.1002/2015GL066753

Satellite data and models suggest that oceanic productivity is reduced in response to less nutrient supply under warming. In contrast, anthropogenic aerosols provide nutrients and exert a fertilizing effect, but its contribution to evolution of oceanic productivity is unknown. We simulate the response of oceanic biogeochemistry to anthropogenic aerosols deposition under varying climate from 1850 to 2010. We find a positive response of observed chlorophyll to deposition of anthropogenic aerosols. Our results suggest that anthropogenic aerosols reduce the sensitivity of oceanic productivity to warming from -15.21.8 to -13.31.6PgCyr(-1)degrees C-1 in global stratified oceans during 1948-2007. The reducing percentage over the North Atlantic, North Pacific, and Indian Oceans reaches 40, 24, and 25%, respectively. We hypothesize that inevitable reduction of aerosol emissions in response to higher air quality standards in the future might accelerate the decline of oceanic productivity per unit warming. FABIO project, a Marie Curie International Incoming Fellowship from European Commission [PIIF-GA-2013-628735]; European Research Council [ERC-2013-SyG-610028]; GENCI-TGCC [2015-t2015012201]; National Natural Science Foundation of China [41201077] SCI(E) EI ARTICLE [e-mail] 24 10745-10754 42