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Projected changes in NOx emissions from lightning as a result of 2000–2050 climate change |
JIANG Hui1,2, LIAO Hong1 |
1State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
2Graduate University of Chinese Academy of Sciences, Beijing 100029, China |
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Abstract Lightning is one of the most important natural sources of atmospheric NOx. The authors investigate the 2000-2050 changes in NOxemissions from lightning using the global three-dimensional Goddard Earth Observing System chemical transport model (GEOS-Chem) driven by meteorological fields from the Goddard Institute for Space Studies (GISS) general circulation model (GCM) 3. Projected changes in climate over 2000-2050 are based on the Intergovernmental Panel on Climate Change (IPCC) A1B scenario. The global NOxemission from lightning is simulated to be 4.8 Tg N in present day and to increase by about 16.7% over 2000-2050 as a result of the future climate change. The largest present-day emissions and climate-induced changes are found in the upper troposphere in the tropics. Regionally in eastern China (20-55°N, 98-125°E), NOxemissions from lighting is simulated to be 0.3 Tg N (6.3% of the global total emission) in present day and to increase by 26.7% over 2000-2050. The simulated changes in NOxfrom lightening correspond well with the projected future changes in convective precipitation.
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Received: 23 April 2013
Revised: 03 May 2013
Accepted: 14 May 2013
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Corresponding Author:
LIAO Hong
E-mail: hongliao@mail.iap.ac.cn
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