Atmospheric observations show accurate reporting and little growth in India's methane emissions.
Atmospheric observations show accurate reporting and little growth in India's methane emissions.
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DOI：
10.1038/s41467-017-00994-7
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发表时间：
2017-10-10
影响因子：
16.6
通讯作者：
Krummel PB
中科院分区：
文献类型：
--
作者：
Ganesan AL;Rigby M;Lunt MF;Parker RJ;Boesch H;Goulding N;Umezawa T;Zahn A;Chatterjee A;Prinn RG;Tiwari YK;van der Schoot M;Krummel PB
据认为，热带湿地、反刍动物或水稻排放量的变化在最近大气甲烷（CH 4）浓度的变化中发挥了作用。印度拥有世界上最大的反刍动物种群，生产世界上约20%的大米。因此，这些来源的变化可能对全球变暖产生重大影响。在这里，我们推断印度的CH 4排放量为2010-2015年期间使用卫星，地面和飞机数据的组合。我们应用一个高分辨率的大气传输模型来模拟来自这些平台的数据，以推断次国家尺度的通量，并量化水稻排放的变化。我们发现，这一时期的平均排放量为22.0（19.6-24.3）Tg yr-1，这与印度向联合国气候变化框架公约报告的排放量一致。2010年至2015年间，年排放量没有显著变化（0.2 ± 0.7 Tg yr−1），这表明主要的CH 4来源没有明显变化。这些发现与另一个主要经济体中国形成了鲜明对比，中国近年来由于化石燃料排放的增加而显示出显着的增长。然而，由于化石燃料增长率不正确，全球排放清单的趋势对中国被高估了。在这里，我们发现印度的增长被高估了，但可能是由于反刍动物和废物部门。印度的甲烷排放量是利用大气测量进行量化的，以便与报告的排放量进行独立比较。Ganesan等人发现，衍生的甲烷排放量与印度的报告一致，并且在2010-2015年之间没有观察到显著的趋势。
Changes in tropical wetland, ruminant or rice emissions are thought to have played a role in recent variations in atmospheric methane (CH4) concentrations. India has the world’s largest ruminant population and produces ~ 20% of the world’s rice. Therefore, changes in these sources could have significant implications for global warming. Here, we infer India’s CH4 emissions for the period 2010–2015 using a combination of satellite, surface and aircraft data. We apply a high-resolution atmospheric transport model to simulate data from these platforms to infer fluxes at sub-national scales and to quantify changes in rice emissions. We find that average emissions over this period are 22.0 (19.6–24.3) Tg yr−1, which is consistent with the emissions reported by India to the United Framework Convention on Climate Change. Annual emissions have not changed significantly (0.2 ± 0.7 Tg yr−1) between 2010 and 2015, suggesting that major CH4 sources did not change appreciably. These findings are in contrast to another major economy, China, which has shown significant growth in recent years due to increasing fossil fuel emissions. However, the trend in a global emission inventory has been overestimated for China due to incorrect rate of fossil fuel growth. Here, we find growth has been overestimated in India but likely due to ruminant and waste sectors. India’s methane emissions have been quantified using atmospheric measurements to provide an independent comparison with reported emissions. Here Ganesan et al. find that derived methane emissions are consistent with India’s reports and no significant trend has been observed between 2010–2015.
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影响因子：
4.4
作者：
FUNG, I;JOHN, J;FRASER, PJ
通讯作者：
FRASER, PJ
影响因子：
4.4
作者：
Manning, A. J.;O'Doherty, S.;Derwent, R. G.
通讯作者：
Derwent, R. G.
DOI：
10.1073/pnas.1314392110
发表时间：
2013-12-10
影响因子：
11.1
作者：
Miller, Scot M.;Wofsy, Steven C.;Sweeney, Colm
通讯作者：
Sweeney, Colm
影响因子：
3.8
作者：
O'Dell, C. W.;Connor, B.;Wunch, D.
通讯作者：
Wunch, D.
影响因子：
6.3
作者：
Ganesan, A. L.;Manning, A. J.;O'Doherty, S.
通讯作者：
O'Doherty, S.